基于SSM框架简易项目“书籍管理系统”，超详细讲解，附源码

本文介绍: 本文是基于SSM框架的简易项目“书籍管理系统”，超适合新手，内容说明超详细，几乎每个地方都加了注释。

我有话说:

我有话说:

首先内容比较多,篇幅比较长,有需要的可以耐心看完.

这个项目最开始是跟着狂神写下来的,附上狂神的详细视频链接及详细笔记:

17、ssm 整合：My bat i s层_哔哩哔哩_bilibilihttps://www.bilibili.com/video/BV1aE41167Tu?p=17&v d _source=b1036c3d2e010aa91f6cc b4fe d6293ec狂神SSM 教程– 专栏 -KuangStud yhttps://www.k uang stu dy.com/zl/ssm#1377532368339955713

“如果没有SSM框架的基础,建议先学完SSM的基础知识,这样听起来会容易很多”.

跟着狂神写项目的期间没有遇到报错,但是写完之后觉得如果只是这样我并不满足,所以把我会的内容基本上都在这个项目中写出来了,我认为这是我的一种进步.

正常来说一个项目从开始到结束应该是一步一步来的,这里因为时间问题,无法一步一步展示.

虽然内容是整个项目的,但是建议还是再纯手打一遍,因为复制粘贴总会有些不必要的问题,哪怕正确的代码,复制粘贴可能还是有问题.

项目中的jsp 页面可以先用vscode写一遍然后复制到jsp 页面即可.

所谓框架,就是搭好一个架子,然后所有的操作都在框架的内部进行,不需要对框架进行其他的修改,而且一些操作交给Spr in g框架就可以帮你完成.

在写这个项目中遇到的一些问题:前段信息乱码,分页查询,大部分的js 操作,有的时候可能并不是代码的问题…等等,但是好在坚持下来并逐一解决,这个项目在一些方面还是可以改进,比如多表查询,页面跳转动画,分页的信息,一些好看的css 样式等.

知识没有白学的,学无止境.

1 项目简介

1.开发环境:

JDK1.8; mysql8.0.31; mybatis3.5.2; mybatis–spring2.0.2; spring–web mvc及spring jdbc都是5.1.9.RELEASE(个人认为目前是用的最舒服的一版)

2.开发软件:

可视化前段:VSCod e; 数据库:navicat; 后端: IDEA2021.3.3; 服务器: To m cat

3.其他类插件:lombok Pa g eHel per fileupload

4.该项目通过SSM框架实现,功能包括”基本的CRUD; 用户的登录注册注销; 拦截器; 分页; 文件上传及文件下载,及一些前段操作等”

2 项目展示

2.1 首先创建 数据库和表信息

1. book表

CREATE DATABASE javawork;
USE javawork;
DROP TABLE IF EXISTS `book`;
CREATE TABLE `book`  (
  `bookid` int(0) NOT NULL AUTO_INCREMENT COMMENT 'uuid',
  `bookname` varchar(20) CHARACTER SET utf8mb3 COLLATE utf8mb3_general_ci NOT NULL COMMENT '图书名称',
  `author` varchar(30) CHARACTER SET utf8mb3 COLLATE utf8mb3_general_ci NOT NULL COMMENT '作者',
  `publish` varchar(30) CHARACTER SET utf8mb3 COLLATE utf8mb3_general_ci NULL DEFAULT NULL COMMENT '出版社',
  `introduction` varchar(50) CHARACTER SET utf8mb3 COLLATE utf8mb3_general_ci NULL DEFAULT NULL COMMENT '简介',
  `price` double NOT NULL COMMENT '价格',
  `booktype` varchar(10) CHARACTER SET utf8mb3 COLLATE utf8mb3_general_ci NOT NULL COMMENT '书籍类型',
  PRIMARY KEY (`bookid`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 19 CHARACTER SET = utf8mb3 COLLATE = utf8mb3_general_ci COMMENT = '图书信息' ROW_FORMAT = Dynamic;


INSERT INTO `book` VALUES (1, '西游记', '吴承恩', '人民文学出版社', '师徒四人去西天取真经', 42, '奇幻类');
INSERT INTO `book` VALUES (2, '三国演义', '罗贯中', '清华大学出版社', '东汉末年分三国。。。', 48, '历史类');
INSERT INTO `book` VALUES (3, '红楼梦', '曹雪芹', '机械工业出版社', '宝玉与众多男女之间故事', 39, '历史类');
INSERT INTO `book` VALUES (4, '资本论', '马克思', '原子能出版社', '马克思的剩余价值理论', 42, '经济类');
INSERT INTO `book` VALUES (5, '经济学原理', '马歇尔', '机械工业出版社', '西方经济学界公认为划时代的著作', 66, '经济类');
INSERT INTO `book` VALUES (6, '大变局下的中国法治', '李卫东', '北京大学出版社', '十大经典法学著作', 42, '政治类');
INSERT INTO `book` VALUES (7, '从你的全世界路过', '张嘉佳', '湖南文艺出版社', '38个爱情故事的小说集', 36, '爱情类');
INSERT INTO `book` VALUES (8, '天才在左,疯子在右', '高铭', '武汉大学出版社', '国内第一本精神病人访谈手记', 30, '教育类');
INSERT INTO `book` VALUES (9, '追风筝的人', '卡勒德·胡赛尼', '上海人民出版社', '人性的背叛与救赎', 36, '情感类');
INSERT INTO `book` VALUES (10, '水浒传', '施耐庵', '人民文学出版社', '108位梁山好汉', 52, '武侠类');
INSERT INTO `book` VALUES (11, '羊脂球', '莫泊桑', '北京联合出版公司', '法国社会各阶层的丑恶嘴脸', 41, '社会类');
INSERT INTO `book` VALUES (12, '百年孤独', '加西亚·马尔克斯', '上海译文出版社', '布恩迪亚家族七代人的百年兴衰', 55, '文学类');
INSERT INTO `book` VALUES (13, '平凡的世界', '路遥', '北京十月文艺出版社', '中国西北农村的历史变革', 58, '文学类');
INSERT INTO `book` VALUES (14, '三体', '刘慈欣', '科幻世界出版社', '征服世界的中国科幻神作', 62, '科幻类');
INSERT INTO `book` VALUES (15, '解忧杂货店', '东野圭谷', '南海出版公司', '收集烦恼和困扰的杂货店', 54, '文学类');
INSERT INTO `book` VALUES (16, '白鹿原', '陈忠实', '人民文学出版社', '中国农村的50年变革', 40, '文学类');
INSERT INTO `book` VALUES (17, '茶馆', '舒庆春(老舍)', '社会科学文献出版社', '一个茶馆的近50年经历', 35, '文学类');
INSERT INTO `book` VALUES (18, '围城', '钱锺书', '上海晨光出版社', '外边的人想进去，里面的人想出来', 30, '文学类');
INSERT INTO `book` VALUES (19, '海边的卡夫卡', '村上春树', '上海译文出版社', '田村卡夫卡的精神救赎', 40, '文学类');
INSERT INTO `book` VALUES (20, '我这一辈子', '舒庆春(老舍)', '中国华侨出版社', '舒庆春的一生', 36, '其他类');
INSERT INTO `book` VALUES (21, '世上另一个我', '萨拉·帕坎南', '湖南文艺出版社', '我在别人设定的角色里拼命挣扎,以为那是我想要的人生', 28, '亲情类');
INSERT INTO `book` VALUES (22, '看见', '柴静', '广西师范大学出版社', '中国社会十年变迁的备忘录', 40, '社会文学类');

2. user表

DROP TABLE IF EXISTS `user`;
CREATE TABLE `user`  (
  `id` int(0) NOT NULL AUTO_INCREMENT COMMENT '用户id',
  `username` varchar(255) CHARACTER SET utf8mb3 COLLATE utf8mb3_general_ci NOT NULL COMMENT '用户名',
  `password` varchar(255) CHARACTER SET utf8mb3 COLLATE utf8mb3_general_ci NOT NULL COMMENT '用户密码rn',
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 16 CHARACTER SET = utf8mb3 COLLATE = utf8mb3_general_ci ROW_FORMAT = Dynamic;


INSERT INTO `user` VALUES (1, 'admin', '123456');

2.2 预先 准备 操作

新建Maven项目”Book”

1. 右键单击Book模块,选择框架支持,选择 web 应用程序(4.0版本);也可以在选择Maven项目是使用 web–app 模板,但是不推荐.

然后在项目中会多出来一个 web的文件夹,注意:文件夹图标的小圆点一定要是亮着的,否则去Facet中调整选择到当前的项目.

2. 引入依赖

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.gcx</groupId>
    <artifactId>Book</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>
    <!--    导入依赖-->
    <dependencies>
        <!--Junit单元测试-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
        <!--数据库驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.31</version>
        </dependency>
        <!-- 数据库连接池 -->
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.2</version>
        </dependency>
        <!--Servlet - JSP -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.2</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <!--Mybatis-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.2</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.2</version>
        </dependency>
        <!--Spring/SpringMVC-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.1.9.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.1.9.RELEASE</version>
        </dependency>
<!--        实体类插件-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.24</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.7</version>
        </dependency>
<!--        文件上传-->
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.4</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.1</version>
        </dependency>
<!--        myBatis分页插件-->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>5.3.2</version>
        </dependency>
    </dependencies>
    <!--    静态资源导出-->
    <build>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
        </resources>
    </build>

</project>

3.为了避免出现404,创建 lib 文件(必须确保所有依赖已加入到maven中)

单击加号后选择库文件,全选,添加,应用即可

4. 配置Tomcat 服务器

然后应用,确认即可

5. 测试Tomcat 服务器能否正常运行

启动Tomcat后浏览器进入名为$Title$的index.jsp页面,并显示$END信息,表示Tomcat 配置没问题

2.3 开始配置项目

1. 创建项目结构

java 文件夹下属于源码文件,resources 文件夹下属于资源文件,web下是前端的一些配置文件及页面.

2. 开始编写实体类

实体类名需要与数据库表名一致

Book

package com.gcx.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
@SuppressWarnings("all")
public class Book {
    private int bookid;
    private String bookname;
    private String author;
    private String publish;
    private String introduction;
    private Double price;
    private String booktype;
}

User

package com.gcx.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class User {
    private String username;
    private String password;
}

3. 编写持久层(dao层)

BookMap per 接口

package com.gcx.dao;

import com.gcx.pojo.Book;
import com.gcx.pojo.User;
import org.apache.ibatis.annotations.Param;

import java.util.List;

public interface BookMapper {
    //    增加一本书
    int addBook(Book book);
    //    删除一本书
    int deleteBookById(@Param("bookid") int id);
    //    更新一本书
    int updateBook(Book book);
    //    查询一本书
    Book queryBookById(@Param("bookid") int id);
    //    通过书名查询书籍,因为可能是一个集合,所以用List
    List<Book> queryBookByName(@Param("bookname") String bookname);
    //    获取登录信息
    User findUserByNameAndPassword(User user);
    //    分页
    List<Book> findList();
    //    注册
    int adduser(User user);


}

因为要通过 my batis链接数据库,所以要配置它的核心配置文件: my batis-config.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <typeAliases>
        <package name="com.gcx.pojo"/>
    </typeAliases>
    <mappers>
        <mapper class="com.gcx.dao.BookMapper"/>
    </mappers>
</configuration>

database.properties

jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/javawork?useSSL=true&amp;useUnicode=true&amp;characterEncoding=utf8&amp;ServerTimezone=Asia/Shanghai
jdbc.username=root
jdbc.password=123456

spring-dao.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:Context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
    <Context:property-placeholder location="classpath:database.properties"/>
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="password" value="${jdbc.password}"/>
        <property name="user" value="${jdbc.username}"/>
        <property name="jdbcUrl" value="${jdbc.url}"/>
        <property name="driverClass" value="${jdbc.driver}"/>
        <!--    配置数据库连接池属性-->
        <property name="maxPoolSize" value="30"/>
        <property name="minPoolSize" value="10"/>
        <!-- 关闭连接后不自动commit -->
        <property name="autoCommitOnClose" value="false"/>
        <!-- 获取连接超时时间 -->
        <property name="checkoutTimeout" value="10000"/>
        <!-- 当获取连接失败重试次数 -->
        <property name="acquireRetryAttempts" value="2"/>
    </bean>
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
        <!--        配置分页插件-->
        <property name="plugins">
            <array>
                <bean class="com.github.pagehelper.PageInterceptor">
                    <property name="properties">
                        <value>
                            helperDialect = mysql
                            reasonable = true
                        </value>
                    </property>
                </bean>
            </array>
        </property>
    </bean>

    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <property name="basePackage" value="com.gcx.dao"/>
    </bean>

</beans>

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd">
    <import resource="classpath:spring-service.xml"/>
    <import resource="classpath:spring-dao.xml"/>
    <import resource="classpath:spring-mvc.xml"/>
</beans>

有报错先不用管,是因为还没有配置对应的XML文件.

注意,这里上边会提示要配置应用程序的上下文

点击配置应用程序上下文,创建新的程序上下文

点击确定就可以了,进入项目设置,点击模块,查看是否配置成功

到此数据库链接完成,配置BookMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.gcx.dao.BookMapper">
    <insert id="addBook" parameterType="book">
        insert into book(bookname,author,publish,introduction,price,booktype)
        values(#{bookname},#{author},#{publish},#{introduction},#{price},#{booktype});
    </insert>
    <delete id="deleteBookById" parameterType="int">
        delete from book where bookid =#{bookid};
    </delete>
    <update id="updateBook" parameterType="book">
        update book set bookname=#{bookname},author=#{author},publish=#{publish},introduction=#{introduction},price=#{price},booktype=#{booktype}
        where bookid=#{bookid};
    </update>
    <select id="queryBookById" resultType="book">
        select *from book where bookid = #{bookid};
    </select>
    <select id="queryBookByName" resultType="book">
        select *from book where bookname = #{bookname};
    </select>
    <select id="findUserByNameAndPassword" resultType="User">
        select *
        from user
        where username = #{username} and password = #{password};
    </select>
    <select id="findList" resultMap="booksresultmap">
        select *
        from book
    </select>
    <resultMap id="booksresultmap" type="com.gcx.pojo.Book">
        <id property="bookid" column="bookid" jdbcType="INTEGER"/>
        <result property="bookname" column="bookname" jdbcType="VARCHAR"/>
        <result property="author" column="author" jdbcType="VARCHAR"/>
        <result property="publish" column="publish" jdbcType="VARCHAR"/>
        <result property="introduction" column="introduction" jdbcType="VARCHAR"/>
        <result property="price" column="price" jdbcType="DOUBLE"/>
        <result property="booktype" column="booktype" jdbcType="INTEGER"/>
    </resultMap>
    <insert id="adduser" parameterType="user">
        insert into user(username,password)
        values (#{username},#{password});
    </insert>
</mapper>

4. 编写业务层代码(service 接口及实现类)

BookServi ce

package com.gcx.service;

import com.gcx.pojo.Book;
import com.gcx.pojo.User;
import com.github.pagehelper.PageInfo;

public interface BookService {
    //    增加一本书
    int addBook(Book book);
    //    删除一本书
    int deleteBookById(int id);
    //    更新一本书
    int updateBook(Book book);
    //    查询一本书
    Book queryBookById(int id);
    //    通过书名查询书籍
    PageInfo<Book> queryBookByName(String bookname);
    //    获取登录信息
    User findUserByNameAndPassword(User user);
    //    分页查询
    PageInfo<Book> findList(Integer pageNum, Integer pageSize);
    //    注册
    int adduser(User user);
}

BookServiceImpl

package com.gcx.service;

import com.gcx.dao.BookMapper;
import com.gcx.pojo.Book;
import com.gcx.pojo.User;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import org.springframework.web.bind.annotation.RequestParam;

import java.util.List;

public class BookServiceImpl implements BookService {
    private BookMapper bookMapper;

    public void setBookMapper(BookMapper bookMapper) {
        this.bookMapper = bookMapper;
    }

    @Override
    public int addBook(Book book) {
        return bookMapper.addBook(book);
    }

    @Override
    public int deleteBookById(int id) {
        return bookMapper.deleteBookById(id);
    }

    @Override
    public int updateBook(Book book) {
        return bookMapper.updateBook(book);
    }

    @Override
    public Book queryBookById(int id) {
        return bookMapper.queryBookById(id);
    }

    @Override
    public PageInfo<Book> queryBookByName(String bookname) {
        List<Book> list = bookMapper.queryBookByName(bookname);
        return new PageInfo<>(list);
    }

    @Override
    public User findUserByNameAndPassword(User user) {
        return bookMapper.findUserByNameAndPassword(user);
    }

    @Override
    public PageInfo<Book> findList(@RequestParam Integer pageNum,
                                   @RequestParam Integer pageSize) {
        //        每页显示多少数据
        if (pageSize== null){
            pageSize=5;
        }
        PageHelper.startPage(pageNum,pageSize);
        List<Book> list = bookMapper.findList();
//        for (Books books : list) {
//            System.out.println("书籍信息:"+books);
//        }
        PageInfo PageInfo = new PageInfo(list);
        System.out.println("总页数:"+PageInfo.getPages());
        System.out.println("总记录数:"+PageInfo.getTotal());
        System.out.println("当前页数:"+PageInfo.getPageNum());
        System.out.println("当前页面记录数:"+PageInfo.getPageSize());
        return new PageInfo<>(list);
    }

    @Override
    public int adduser(User user) {
        return bookMapper.adduser(user);
    }
}

配置spring-service.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:Context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/cache"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd">
    <Context:component-scan base-package="com.gcx.service"/>
    <bean id="BookServiceImpl" class="com.gcx.service.BookServiceImpl">
        <property name="bookMapper" ref="bookMapper"/>
    </bean>
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

</beans>

配置上下文为applicationContext.xml.

5. 配置spring-mvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:Context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
<!--    开启注解-->
    <mvc:annotation-driven/>
<!--    过滤静态资源-->
    <mvc:default-servlet-handler/>
<!--    扫描包下注解-->
    <Context:component-scan base-package="com.gcx.controller"/>
<!--    视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
<!--    配置拦截器-->
    <mvc:interceptors>
        <mvc:interceptor>
            <mvc:mapping path="/book/**"/>
            <bean class="com.gcx.interceptor.LoginInterceptor"/>
        </mvc:interceptor>
    </mvc:interceptors>
    <!--文件上传配置-->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <!-- 请求的编码格式，必须和jSP的pageEncoding属性一致，以便正确读取表单的内容，默认为ISO-8859-1 -->
        <property name="defaultEncoding" value="utf-8"/>
        <!-- 上传文件大小上限，单位为字节（10485760=10M） -->
        <property name="maxUploadSize" value="10485760"/>
        <property name="maxInMemorySize" value="40960"/>
    </bean>
</beans>

如果在配置拦截器的地方报错,是因为还没有些拦截器的类,可以先创建一个不写内容.

配置上下文为applicationContext.xml

此时在Spring的模块中显示如下:

到这里,底层代码基本完成了.然后就是前后端的链接:

在mvc中是通过Servlet层的HttpServlet来实现的,在SpringMVC中,则是通过Controller层的添加注解或继承Controller接口来实现的.

6. BookController

package com.gcx.controller;

import com.gcx.pojo.Book;
import com.gcx.pojo.User;
import com.gcx.service.BookService;
import com.github.pagehelper.PageInfo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.commons.CommonsMultipartFile;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.*;
import java.net.URLEncoder;
/**
 * author: labixiaoxin@
 * advice: Controller层可以写的更分工明确;
 * 新建LoginController来写登录.注册.注销的实现;
 * 新建PageController用来写分页的实现;
 * ...其他类似
 */

@Controller
@RequestMapping("/book")
@SuppressWarnings("all")
public class BookController {
    @Autowired
    @Qualifier("BookServiceImpl")
    private BookService bookService;

    //    跳转到登录页
    @RequestMapping("toLogin")
    public String Login() {
        return "Login";
    }
    
//    进入登录页
    /**
     *
     * @param session 将数据保存在session中
     * @param user    数据库内的用户登录信息
     * @param model   将数据通过el表达式显示在页面
     * @return 跳转页面
     */
    @RequestMapping("Login")
    public String Login(HttpSession session, User user, Model model) {
//        用来获取user内的信息
        User userByNP = bookService.findUserByNameAndPassword(user);
        /**
         *
         * 调用业务层接口内方法
         * 判断用户信息是否正确,且用户信息不为空.
         * 将user信息保存在session中,并进入首页
         * 否则返回error1信息
         */
        if (userByNP != null) {
            session.setAttribute("userLoginInfo", user);
            System.out.println(user);
            return "redirect:/book/allbook/1";
        } else {
            model.addAttribute("error1", "账号或密码错误,请重新输入");
            return "Login";
        }
    }

    //   跳转注册
    @RequestMapping("toregisterPage")
    public String toregisterPage() {
        return "register";
    }

    //    注册sql
    /**
     *
     * @param username
     * @param password 用@RequestParam获取前段传递的信息获取用户名和密码
     * @param session
     * @return
     */
    @GetMapping("register")
    public String register(
            @RequestParam("username") String username,
            @RequestParam("password") String password, HttpSession session) {
        User user = new User();
        user.setUsername(username);
        user.setPassword(password);
        bookService.adduser(user);
        session.setAttribute("userLoginInfo", user);
        System.out.println(user);
        return "Login";
    }

    /**
     *
     * 两种方法:
     *      1.removeAttribute 移除指定的信息
     *      2.invalidate 移除session中所有信息
     * @param
     * @return
     */
    @RequestMapping("destory")
    public String destory(HttpSession session) {
        session.removeAttribute("userLoginInfo");
//        session.invalidate();
//        User user = new User();
//         验证是否注销成功
//        System.out.println(user.toString());
        return "Login";
    }

    //    登录页面进入首页
    @RequestMapping("toallbook")
    public String toallbook() {
        return "allbook";
    }
    
    //    查询全部书籍(首页)
    /**
     *
     *对展示页面进行分页
     * @param pageIndex 当前页码
     * @param model     给前端传信息
     *                  if:如果当前页码<=1,则设置为第一页
     *                  pageSize=null=5
     * 在Service接口中返回PageInfo类型,保存到"PageInfo"中,方便前段调用PageInfo属性
     * @return
     */
    @GetMapping("allbook/{num}")
    public String list(@PathVariable("num") Integer pageIndex, Model model) {
        if (pageIndex <= 1) {
            pageIndex = 1;
        }
        PageInfo<Book> list = bookService.findList(pageIndex, null);
        model.addAttribute("PageInfo", list);
        return "allbook";
    }
    
    //跳转到新增书籍页面
    @RequestMapping("toAddBook")
    public String toAddPaper() {
        return "addBook";
    }

    //执行sql新增书籍
    @RequestMapping("addBook")
    public String addBook(Book book) {
        bookService.addBook(book);
        return "redirect:/book/allbook/1";
    }

    //    跳转到更改书籍页面
    @RequestMapping("toupdateBook")
    public String toupdatePaper(int id, Model model) {
        Book book = bookService.queryBookById(id);
        model.addAttribute("Book", book);
        return "updatebook";
    }

    //    执行sql更改书籍
    @RequestMapping("updateBook")
    public String updateBook(Book book) {
        bookService.updateBook(book);
        return "redirect:/book/allbook/1";
    }
    
//    执行sql删除书籍
    /**
     *
     * @param id restful风格
     * @return
     */
    @RequestMapping("deletebook/{bookid}")
    public String deleteBook(@PathVariable("bookid") int id) {
        bookService.deleteBookById(id);
        return "redirect:/book/allbook/1";
    }
    
//    执行SQL(根据书籍名称)查询书籍
    /**
     *
     * @param queryBookname 查询书籍的名字
     * @param model
     * @return
     */
    @GetMapping("querybook")
    public String queryBook(@RequestParam("queryBookname") String queryBookname,
                            Model model) {
        PageInfo<Book> list = bookService.queryBookByName(queryBookname);
//        如果输入为空或输入的信息不存在,返回error信息
//        if (queryBookname == null) {
//            list = bookService.queryAllBook();
//            model.addAttribute("error1", "没有该书籍,请重新查询");
//        }
            System.out.println(list);
            model.addAttribute("PageInfo", list);
            return "allbook";
    }
    
    /**
     * 文件上传
     * @param file
     * @param request
     * @return
     * @throws IOException
     *
     * @RequestParam("file") 将name=file控件得到的文件封装成CommonsMultipartFile 对象
     * 批量上传CommonsMultipartFile则为数组即可
     */
    @RequestMapping("/upload")
    public String fileUpload(@RequestParam("file") CommonsMultipartFile file , HttpServletRequest request) throws IOException {
//      file.getOriginalFilename() :获取文件名;
        String uploadFileName = file.getOriginalFilename();
//      如果文件名为空，直接回到首页！
            if ("".equals(uploadFileName)){
                return "redirect:/book/allbook/1";
            }
        System.out.println("上传文件名 : "+uploadFileName);
//      上传路径保存设置(绝对路径)
        String path = "C:\Users\Gu_cx\Desktop\Book\web\upload";
//      如果路径不存在，创建一个
        File realPath = new File(path);
            if (!realPath.exists()){
                realPath.mkdir();
            }
        System.out.println("上传文件保存地址："+realPath);
        InputStream is = file.getInputStream(); //文件输入流
        OutputStream os = new FileOutputStream(new File(realPath,uploadFileName)); //文件输出流
//      读取写出
        int len=0;
        byte[] buffer = new byte[1024];
        while ((len=is.read(buffer))!=-1){
            os.write(buffer,0,len);
            os.flush();
        }
        os.close();
        is.close();
        return "redirect:/book/allbook/1";
    }
    
//    下载图片
    @RequestMapping(value="/download")
    public String downloads(HttpServletResponse response , HttpServletRequest request) throws Exception{
//      要下载的图片地址(绝对路径)
        String path = "C:\Users\Gu_cx\Desktop\Book\web\img\idea.png";
        String fileName = path.substring(path.lastIndexOf("\")+1);
//      1、设置response 响应头
            response.reset(); //设置页面不缓存,清空buffer
            response.setCharacterEncoding("UTF-8"); //字符编码
            response.setContentType("multipart/form-data"); //二进制传输数据
//      设置响应头(百度web下载文件的头信息)
            response.setHeader("Content-Disposition",
                "attachment;fileName="+ URLEncoder.encode(fileName, "UTF-8"));
//      2、 读取文件--输入流
        InputStream input=new FileInputStream(path);
//      3、 写出文件--输出流
        OutputStream out = response.getOutputStream();
        byte[] buff =new byte[1024];
        int index=0;
//      4、执行 写出操作
        while((index= input.read(buff))!= -1){
            out.write(buff, 0, index);
            out.flush();
        }
        out.close();
        input.close();
        return null;
    }
}

7. LoginInterceptor拦截器

package com.gcx.interceptor;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
/**
*
*因为是boolean 的返回类型,true代表可以通过拦截器,false代表被拦截器拦截,不能够通过
*/
//      设置编码格式
        request.setCharacterEncoding("UTF-8");
        HttpSession session = request.getSession();
//     通过Controller中的setAttribute保存的信息,在这里通过get获取到,如果userLoginInfo内不为空时可以通过
        if ( session.getAttribute("userLoginInfo")!=null){
            System.out.println("执行了登录拦截器=>111");
            return true;
        }
//     getRequestURI().contains属于获取URL的地址,让URL进入到toLogin;Login;toregisterPage;register时可以通过
        if (request.getRequestURI().contains("toLogin")){
            System.out.println("执行了登录拦截器=>222");
            return true;
        }
        if (request.getRequestURI().contains("Login")){
            System.out.println("执行了登录拦截器=>333");
            return true;
        }
        if (request.getRequestURI().contains("toregisterPage")){
            System.out.println("执行了登录拦截器=>444");
            return true;
        }
        if (request.getRequestURI().contains("register")){
            System.out.println("执行了登录拦截器=>555");
            return true;
        }
//        判断当不满足以上条件使,都要被拦截器拦截,不能通过并重定向到Login.jsp页面
        request.getRequestDispatcher("/WEB-INF/jsp/Login.jsp").forward(request,response);
        return false;
    }
}

到这里,源码及配置文件层都已经完成

2.4 开始web层

首先,因为视图解析器中的前缀是WEB-INF下的jsp文件夹,所以在WEB-INF下新建 jsp文件

1. 首先index.jsp(跳转进入页)

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%--
  Created by IntelliJ IDEA.
  User: 蜡笔小鑫
  Date: 2022/12/29
  Time: 15:11
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
  <meta charset="utf-8">
  <title>首页</title>
<%--    使用纯jquery实现轮播图;
优点:适合新手;
缺点:浪费资源,每次加载页面都要更新请求,占用内存和网络--%>
  <script src="https://cdn.bootcss.com/jquery/1.10.2/jquery.min.js"></script>
  <link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
  <link rel="stylesheet" href="${pageContext.request.contextPath}/css/index.css">
  <script src="js/index.js">
  </script>
</head>
<body>
<table>
    <tr>
        <td>
            <header>

                <div class="bigBox" id="oImg">
                    <!-- 轮流播放图片 -->
                    <img id="insert" src="indexImg/1.jpg"/>
                </div>
                <p class="left" onclick="goBack()"></p>
                <p class="right" onclick="goForward()"></p>
                <ul id="nav">
                    <!-- 指定某张图片 -->
                    <li id="1" onclick="move(this)">1</li>
                    <li id="2" onclick="move(this)">2</li>
                    <li id="3" onclick="move(this)">3</li>
                    <li id="4" onclick="move(this)">4</li>
                    <li id="5" onclick="move(this)">5</li>
                    <li id="6" onclick="move(this)">6</li>
                </ul>
            </header>
        </td>
        <td>
            <h1 class="threesolid">欢迎进入书籍管理系统</h1>
            <div class="texts">
               <!-- 所有的转发地址都要养成写${pageContext.request.contextPath}的习惯 -->
                <a class="btn btn--stripe" href="${pageContext.request.contextPath}/book/toLogin">登录</a><br>
                <a class="btn btn--stripe" href="${pageContext.request.contextPath}/book/allbook">进入书籍页面</a>
            </div>
        </td>
    </tr>

</table>
</body>
</html>

2. 首页 allbook

<%--
  Created by IntelliJ IDEA.
  User: 蜡笔小鑫
  Date: 2022/12/25
  Time: 14:38
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
    <title>书籍展示</title>
    <link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
    <style>
        .title{
            font-family:"华文彩云";/*设置字体*/
            font-size:64px; /*设置字体大小*/
            font-weight:normal; /*设置字体粗细*/
            -webkit-text-stroke:1px #0000FF;        /*文字描边*/
            -webkit-text-fill-color:transparent;    /*设置文字的填充颜色*/
        }
    </style>
    <script>
    /*页面弹窗*/
    function ok(){
            alert("删除成功");
        }
    </script>
</head>
<body>
<div class="title">书籍展示</div>
<div class="container">
    <div class="row clearfix">
        <div class="col-md-12 column">
            <div class="page-header">
                <h1>
                    <small>书籍列表----显示所有书籍</small>
                </h1>
                <div style="text-align: right">
                    <a href="${pageContext.request.contextPath}/book/allbook/1" title="返回显示全部书籍">首页</a>
                    <a href="${pageContext.request.contextPath}/book/toLogin" title="返回登录页面">登录</a>
                    <a href="${pageContext.request.contextPath}/book/destory" title="注销当前用户信息">注销</a>
                </div>
            </div>
        </div>
        <div class="row">
            <div class="col-md-4 column">
                <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/toAddBook">新增书籍</a>
            </div>
            <div class="col-md-4 column">
            </div>
            <div class="col-md-4 column">
                <form action="${pageContext.request.contextPath}/book/querybook" method="get" style="float: right">
                    <table>
                        <tr>
                            <%--                            <td style="width: 170px">--%>
                            <%--                                <span style="color: red;font-weight: bold;text-align: right">${error1}</span>--%>
                            <%--                            </td>--%>
                            <td>
                                <input type="text" name="queryBookname" class="form-control" placeholder="请输入要查询的书籍名称">
                            </td>
                            <td>&amp;nbsp;</td>
                            <td>
                                <input type="submit" value="查询" class="btn btn-primary">
                            </td>
                        </tr>
                    </table>
                </form>
            </div>
        </div>
    </div>
    <div class="row clearfix ">
        <div col-md-12 column class=" table-responsive" >
            <table class="table table-hover table-striped">
                <thead>
                <tr>
                    <th>书籍名称</th>
                    <th>作者</th>
                    <th>出版社</th>
                    <th>书籍编号</th>
                    <th>详情</th>
                    <th>价格</th>
                    <th>书籍类别</th>
                    <th>操作</th>
                </tr>
                </thead>
                <tbody>
                    /*调用PageInfo里的list属性*/
                <c:forEach items="${PageInfo.list}" var="book" >
                    <tr>
                        <td>${book.bookname}</td>
                        <td>${book.author}</td>
                        <td>${book.publish}</td>
                        <td>${book.bookid}</td>
                        <td>${book.introduction}</td>
                        <td>${book.price}</td>
                        <td>${book.booktype}</td>
                        <td>
                            <a href="${pageContext.request.contextPath}/book/toupdateBook?id=${book.bookid}">修改</a>
                            &amp;nbsp;|&amp;nbsp;
                            <a href="${pageContext.request.contextPath}/book/deletebook/${book.bookid}" onclick="ok()">删除</a>
                            <span>

                            </span>
                        </td>
                    </tr>
                </c:forEach>
                </tbody>
            </table>

            <ul class="pagination">
                <%--    如果当前页码-1>=0,则显示首页,即在第一页时不显示首页--%>
                <c:if test="${PageInfo.prePage-1>=0}">
                    <li><a href="${PageInfo.navigateFirstPage}">首页</a></li>
                </c:if>
                <%--            当有上一页"且"总页数>2时 显示上一页--%>
                <c:if test="${(PageInfo.hasPreviousPage)&amp;&amp;(PageInfo.pages)>2}">
                    <li><a href="${pageContext.request.contextPath}/book/allbook/${num-1}">&lt; 上一页</a></li>
                </c:if>
                <%--                循环显示页数--%>
                <c:forEach items="${PageInfo.navigatepageNums}" var="num">
                    <%--            只需要一个get请求去获得到pageIndex--%>
                    <li><a href="${pageContext.request.contextPath}/book/allbook/${num}">${num}</a></li>
                </c:forEach>
                <%--            当有下一页"且"总页数>2"且"当前页不是最后一页时 显示下一页--%>
                <c:if test="${(PageInfo.hasPreviousPage)&&(PageInfo.pages)>2&&(PageInfo.pageNum!=PageInfo.navigateLastPage)}">
                    <li><a href="${pageContext.request.contextPath}/book/allbook/${num+1}">下一页 &gt;</a></li>
                </c:if>
                <%--            当前页码+1<=总页数,则显尾页,即在最后一页时不显示尾页--%>
                <c:if test="${PageInfo.pageNum+1<=PageInfo.pages}">
                    <li><a href="${PageInfo.navigateLastPage}">尾页</a></li>
                </c:if>
                <span style="font-size: 20px;margin-left: 20px;color: #6363ee">共${PageInfo.pages}页</span>
<%--                <span style="font-size: 20px;margin-left: 20px;color: #6363ee">每页显示--%>
<%--                    <select>--%>
<%--                        <option value="${PageInfo.pageSize==5}">5</option>--%>
<%--                        <option value="${PageInfo.pageSize==10}">10</option>--%>
<%--                    </select>--%>
<%--                    条数据</span>--%>
                <span style="font-size: 20px;margin-left: 20px;color: #6363ee">每页显示${PageInfo.pageSize}条信息</span>
                <span style="font-size: 20px;margin-left: 20px;color: #6363ee">共${PageInfo.total}条信息</span>
            </ul>
            <form style="" action="${pageContext.request.contextPath}/book/upload" enctype="multipart/form-data" method="post">
                <table>
                    <td>
                        <input style="width: 190px" type="file" name="file">
                    </td>
                    <td style="width: 100px">
                        <input type="submit" value="点击上传">
                    </td>
                    <td>
                        <a href="${pageContext.request.contextPath}/img/idea.png">展示图片</a>
                        &nbsp;|&nbsp;
                        <a href="${pageContext.request.contextPath}/book/download">点击下载</a>
                    </td>

                </table>

            </form>
        </div>
    </div>
</div>
</body>
</html>

3. 新增书籍页面 addBook.jsp

<%--
  Created by IntelliJ IDEA.
  User: 蜡笔小鑫
  Date: 2022/12/25
  Time: 17:24
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>添加书籍</title>
    <link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">
    <div class="row clearfix">
        <div class="col-md-12 column">
            <div class="page-header">
                <h1>
                    <small>书籍列表----新增书籍</small>
                </h1>
            </div>
        </div>
    </div>
    <form action="${pageContext.request.contextPath}/book/addBook" method="post">
        <div class="form-group">
            <label for="bkname">书籍名称</label>
            <input type="text" class="form-control" id="bkname" name="bookname" placeholder="书籍名称" required>
        </div>
        <div class="form-group">
            <label for="author">作者</label>
            <input type="text" class="form-control" id="author" name="author" placeholder="作者" required>
        </div>
        <div class="form-group">
            <label for="publish">出版社</label>
            <input type="text" class="form-control" id="publish" name="publish" placeholder="出版社" required>
        </div>
        <div class="form-group">
            <label for="introduction">详情</label>
            <input type="text" class="form-control" id="introduction" name="introduction" placeholder="书籍详情" required>
        </div>
        <div class="form-group">
            <label for="price">价格</label>
            <input type="text" class="form-control" id="price" name="price" placeholder="价格" required>
        </div>
        <div class="select">
            <label for="booktype">书籍类别</label>
            <input type="text" class="form-control" list="optionList" id="booktype" name="booktype" placeholder="书籍类别" required>
            <datalist id="optionList">
                <option value="文学类">文学类</option>
                <option value="历史类">历史类</option>
                <option value="社会类">社会类</option>
                <option value="爱情类">爱情类</option>
                <option value="科幻类">科幻类</option>
                <option value="社会文学类">社会文学类</option>
                <option value="武侠类">武侠类</option>
                <option value="亲情类">亲情类</option>
                <option value="奇幻类">奇幻类</option>
                <option value="政治类">政治类</option>
                <option value="经济类">经济类</option>
                <option value="其他类">其他类</option>
            </datalist>
        </div>
        <button type="submit" class="btn btn-default btn-lg active" style="margin-left:1050px;margin-top: 30px">添加</button>
    </form>
</div>
</body>
</html>

4. 修改书籍页面 updatebook.jsp

<%--
  Created by IntelliJ IDEA.
  User: 蜡笔小鑫
  Date: 2022/12/25
  Time: 17:49
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>修改书籍</title>
    <link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">

</head>
<body>
<div class="container">
    <div class="row clearfix">
        <div class="col-md-12 column">
            <div class="page-header">
                <h1>
                    <small>书籍列表----修改书籍</small>
                </h1>
            </div>
        </div>
    </div>
    <form action="${pageContext.request.contextPath}/book/updateBook" method="get">
        <input type="hidden" name="bookid" value="${Book.bookid}">
    <div class="form-group">
        <label for="bookname">书籍名称</label>
        <input type="text" class="form-control" id="bookname" name="bookname" value="${Book.bookname}" placeholder="书籍名称" required>
    </div>
    <div class="form-group">
        <label for="author">作者</label>
        <input type="text" class="form-control" id="author" name="author" value="${Book.author}" placeholder="作者" required>
    </div>
    <div class="form-group">
        <label for="publish">出版社</label>
        <input type="text" class="form-control" id="publish" name="publish" value="${Book.publish}" placeholder="出版社" required>
    </div>
    <div class="form-group">
        <label for="introduction">详情</label>
        <input type="text" class="form-control" id="introduction" name="introduction" value="${Book.introduction}" placeholder="书籍详情" required>
    </div>
    <div class="form-group">
        <label for="price">价格</label>
        <input type="text" class="form-control" id="price" name="price" value="${Book.price}" placeholder="价格" required>
    </div>
    <div class="form-group">
        <label for="booktype">书籍类别</label>
        <input type="text" class="form-control" list="optionList" id="booktype" name="booktype" value="${Book.booktype}" placeholder="书籍类别" required>
        <datalist id="optionList">
            <option value="文学类">文学类</option>
            <option value="历史类">历史类</option>
            <option value="社会类">社会类</option>
            <option value="爱情类">爱情类</option>
            <option value="科幻类">科幻类</option>
            <option value="社会文学类">社会文学类</option>
            <option value="武侠类">武侠类</option>
            <option value="亲情类">亲情类</option>
            <option value="奇幻类">奇幻类</option>
            <option value="政治类">政治类</option>
            <option value="经济类">经济类</option>
            <option value="其他类">其他类</option>
        </datalist>
    </div>
        <button type="submit" class="btn btn-default btn-lg active " style="margin-left:1050px;margin-top: 20px">修改</button>
    </form>
</div>
</body>
</html>

5. 登录页 Login.jsp

<%--
  Created by IntelliJ IDEA.
  User: 蜡笔小鑫
  Date: 2022/12/30
  Time: 14:20
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>登录</title>
    <link rel="stylesheet" href="${pageContext.request.contextPath}/css/style.css">
    <link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>

<body>
<form action="${pageContext.request.contextPath}/book/Login" method="get">
    <div class="box">
        <div class="content">
            <div class="login-wrapper">
                <h1 style="font-family: 华文楷体;font-weight: bolder;font-size: 50px">登录</h1>
                <div class="login-form">
                    <div class="username form-item">
                        <span style="font-weight: bolder;font-family: 华文宋体;font-size: 15px">用户名</span>
                        <input type="text" class="input-item" name="username" placeholder="请输入用户名">
                    </div>
                    <div class="password form-item">
                        <span style="font-weight: bolder;font-family: 华文宋体;font-size: 15px">密码</span>
                        <input type="password" class="input-item" name="password" placeholder="请输入密码">
                    </div>
                    <span style="color: red;font-weight: bolder">${error1}</span>
                    <input type="submit" style="margin-bottom: 20px" class="login-btn" value="登录">
                    <a class="astyle" href="${pageContext.request.contextPath}/book/toregisterPage" title="注册账号">没有账号?点击注册</a>
                </div>
                <div class="divider">
                    <span class="line"></span>
                    <span class="divider-text">其他方式登录</span>
                    <span class="line"></span>
                </div>
                <div class="other-login-wrapper">
                    <div class="other-login-item">
                        <img src="../img/QQ.png" alt="啊!图片去月球度假了" title="使用QQ登录">
                    </div>
                    <div class="other-login-item">
                        <img src="../img/WeChat.png" alt="啊!图片去月球度假了" title="使用微信登录">
                    </div>
                </div>
            </div>
        </div>
    </div>
</form>
</body>

</html>

6. 注册页 register.jsp

<%--
  Created by IntelliJ IDEA.
  User: 蜡笔小鑫
  Date: 2022/12/30
  Time: 15:49
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <link rel="stylesheet" href="${pageContext.request.contextPath}/css/register.css">
    <title>注册</title>
</head>

<body>
<form action="${pageContext.request.contextPath}/book/register"  method="get" >
    <div class="headbox">
        <p style="font-family: 华文新魏,serif;font-size: 40px">
        &nbsp;&nbsp;新用户注册
        </p>
        <h1 style="font-size: 40px">
            USER REGISTER
        </h1>
        <div class="hd_center">
            <div class="hd_form">
                <form action="${pageContext.request.contextPath}/book/register" method="get">
                    <table style="margin-top: 40px">
                        <tr>
                            <td class="td_left">用户名：</td>
                            <td class="td_right">
                                <input type="text" name="username" placeholder="请输入注册用户名">
                            </td>
                        </tr>
                    <tr></tr>
                    <tr></tr>
                        <tr>
                            <td class="td_left">密码：</td>
                            <td class="td_right">
                                <input type="text" name="password" placeholder="请输入注册密码">
                            </td>
                        </tr>
                        <tr></tr>
                        <tr></tr>
                        <tr>
                            <td></td>
                            <td colspan="2">
                                <input type="submit"value="注册" target="_blank">
                            </td>
                        </tr>
                        <tr>
                            <td></td>
                            <td>
                                <p style="text-align: right;">已有账号?<a href="${pageContext.request.contextPath}/book/toLogin" target="_blank">立即登录</a></p>
                            </td>
                        </tr>
                    </table>
                </form>
            </div>
        </div>
    </div>
</form>
</body>

</html>

7. css层

index.css

header {
    width: 1000px;
    height: 600px;
    position: relative;
    margin: 70px 60px auto;
}
.bigBox{
    width:1000px;
    height:600px;
    overflow:hidden;
    overflow-x: auto;
    white-space: nowrap;
}
.bigBox img{
    width: 100%;
    height: 100%;
}
.left{
    width: 70px;
    height: 70px;
    cursor: pointer;
    float: left;
    left: 0;
    top: 50%;
    background: url("../indexImg/left.png") ;
}
.right{
    width: 70px;
    height: 70px;
    cursor: pointer;
    float: right;
    right: 0;
    top: 50%;
    background: url("../indexImg/right.png") ;
}
#nav {
    bottom: 5px;
    left: 30%;
    margin: 10px 10px 150px 150px;
}

#nav li {
    width: 30px;
    height: 30px;
    line-height: 30px;
    text-align: center;
    background: #ccc;
    font-size: 24px;
    border-radius: 9px;
    color: darkslategrey;
    font-family: 'Times New Roman', Times, serif;
    margin: 0 25px;
    float: left;
    cursor: pointer;
    list-style: none;
}

#nav li:hover {
    background: peru;
}

a{
    /*display: inline-block;*/
    /*padding-left: 10px;*/
    /*text-decoration: none;*/
    /*color: black;*/
    /*font-size: 30px;*/
    width: 250px;
    height: 70px;
    /*margin: 100px auto;*/
    /*text-align: center;*/
    /*line-height: 40px;*/
    /*background: green;*/
    /*border-radius: 5px 0px 0px 5px;*/
}

.texts{
    width: 250px;
    height: 70px;
    text-align: center;
    line-height: 40px;
}
h1{
    font-family: 黑体, serif;
    font-size: xx-large;
    font-weight: bold;
    margin: 30px 50px 120px 40px;
}
.threesolid{
     font-size: 30px;
     color:#fefefe;
     text-shadow:0px 1px 0px #c0c0c0,
     0px 2px 0px #b0b0b0,
     0px 3px 0px #a0a0a0,
     0px 4px 0px #909090,
     0px 5px 10px rgba(0, 0, 0, .9);
 }

@-webkit-keyframes stripe-slide {
    0% {
        background-position: 0% 0;
    }
    100% {
        background-position: 100% 0;
    }
}
@keyframes stripe-slide {
    0% {
        background-position: 0% 0;
    }
    100% {
        background-position: 100% 0;
    }
}
body {
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    font-family: sans-serif;
}
.btn {
    overflow: visible;
    margin: 0;
    padding: 0;
    border: 0;
    background: transparent;
    font: inherit;
    line-height: normal;
    cursor: pointer;
    -moz-user-select: text;
    display: block;
    text-decoration: none;
    text-transform: uppercase;
    padding: 16px 36px 22px;
    background-color: #fff;
    color: #666;
    border: 2px solid #666;
    border-radius: 6px;
    margin-bottom: 16px;
    transition: all 0.5s ease;
}
.btn::-moz-focus-inner {
    padding: 0;
    border: 0;
}
.btn--stripe {
    overflow: hidden;
    position: relative;
}
.btn--stripe:after {
    content: "";
    display: block;
    height: 7px;
    width: 100%;
    background-image: repeating-linear-gradient(45deg, #666, #666 1px, transparent 2px, transparent 5px);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-top: 1px solid #666;
    position: absolute;
    left: 0;
    bottom: 0;
    background-size: 7px 7px;
}
.btn--stripe:hover {
    background-color: #666;
    color: #fff;
    border-color: #000;
}
.btn--stripe:hover:after {
    background-image: repeating-linear-gradient(45deg, #fff, #fff 1px, transparent 2px, transparent 5px);
    border-top: 1px solid #000;
    -webkit-animation: stripe-slide 12s infinite linear forwards;
    animation: stripe-slide 12s infinite linear forwards;
}
.btn--large {
    width: 50%;
}
.btn--radius {
    border-radius: 36px;
}

header {
    width: 1000px;
    height: 600px;
    position: relative;
    margin: 70px 60px auto;
}
.bigBox{
    width:1000px;
    height:600px;
    overflow:hidden;
    overflow-x: auto;
    white-space: nowrap;
}
.bigBox img{
    width: 100%;
    height: 100%;
}
.left{
    width: 70px;
    height: 70px;
    cursor: pointer;
    float: left;
    left: 0;
    top: 50%;
    background: url("../indexImg/left.png") ;
}
.right{
    width: 70px;
    height: 70px;
    cursor: pointer;
    float: right;
    right: 0;
    top: 50%;
    background: url("../indexImg/right.png") ;
}
#nav {
    bottom: 5px;
    left: 30%;
    margin: 10px 10px 150px 150px;
}

#nav li {
    width: 30px;
    height: 30px;
    line-height: 30px;
    text-align: center;
    background: #ccc;
    font-size: 24px;
    border-radius: 9px;
    color: darkslategrey;
    font-family: 'Times New Roman', Times, serif;
    margin: 0 25px;
    float: left;
    cursor: pointer;
    list-style: none;
}

#nav li:hover {
    background: peru;
}

a{
    /*display: inline-block;*/
    /*padding-left: 10px;*/
    /*text-decoration: none;*/
    /*color: black;*/
    /*font-size: 30px;*/
    width: 250px;
    height: 70px;
    /*margin: 100px auto;*/
    /*text-align: center;*/
    /*line-height: 40px;*/
    /*background: green;*/
    /*border-radius: 5px 0px 0px 5px;*/
}

.texts{
    width: 250px;
    height: 70px;
    text-align: center;
    line-height: 40px;
}
h1{
    font-family: 黑体, serif;
    font-size: xx-large;
    font-weight: bold;
    margin: 30px 50px 120px 40px;
}
.threesolid{
     font-size: 30px;
     color:#fefefe;
     text-shadow:0px 1px 0px #c0c0c0,
     0px 2px 0px #b0b0b0,
     0px 3px 0px #a0a0a0,
     0px 4px 0px #909090,
     0px 5px 10px rgba(0, 0, 0, .9);
 }

@-webkit-keyframes stripe-slide {
    0% {
        background-position: 0% 0;
    }
    100% {
        background-position: 100% 0;
    }
}
@keyframes stripe-slide {
    0% {
        background-position: 0% 0;
    }
    100% {
        background-position: 100% 0;
    }
}
body {
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    font-family: sans-serif;
}
.btn {
    overflow: visible;
    margin: 0;
    padding: 0;
    border: 0;
    background: transparent;
    font: inherit;
    line-height: normal;
    cursor: pointer;
    -moz-user-select: text;
    display: block;
    text-decoration: none;
    text-transform: uppercase;
    padding: 16px 36px 22px;
    background-color: #fff;
    color: #666;
    border: 2px solid #666;
    border-radius: 6px;
    margin-bottom: 16px;
    transition: all 0.5s ease;
}
.btn::-moz-focus-inner {
    padding: 0;
    border: 0;
}
.btn--stripe {
    overflow: hidden;
    position: relative;
}
.btn--stripe:after {
    content: "";
    display: block;
    height: 7px;
    width: 100%;
    background-image: repeating-linear-gradient(45deg, #666, #666 1px, transparent 2px, transparent 5px);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-top: 1px solid #666;
    position: absolute;
    left: 0;
    bottom: 0;
    background-size: 7px 7px;
}
.btn--stripe:hover {
    background-color: #666;
    color: #fff;
    border-color: #000;
}
.btn--stripe:hover:after {
    background-image: repeating-linear-gradient(45deg, #fff, #fff 1px, transparent 2px, transparent 5px);
    border-top: 1px solid #000;
    -webkit-animation: stripe-slide 12s infinite linear forwards;
    animation: stripe-slide 12s infinite linear forwards;
}
.btn--large {
    width: 50%;
}
.btn--radius {
    border-radius: 36px;
}

style.css(登录页样式)

@charset "UTF-8";
* {
  margin: 0;
  padding: 0;
}

/*公共CSS*/
.box {
  width: 100vw;
  height: 100vh;
  background-color: rgb(29, 67, 89);
}
.box .content .login-wrapper .login-form .astyle{
  color: black;
  margin-left: 200px;
  text-decoration: none;
}
.box .content .login-wrapper .login-form .astyle:hover{
  color: #6363ee;
  font-weight: bolder;
}
.box .content .login-wrapper h1 {
  text-align: center;
}
.box .content .login-wrapper .login-form .form-item {
  margin: 20px 0;
}
.box .content .login-wrapper .login-form .form-item span {
  display: block;
  margin: 5px 20px;
  font-weight: 100;
}
.box .content .login-wrapper .login-form .form-item .input-item {
  width: 100%;
  border-radius: 40px;
  padding: 20px;
  box-sizing: border-box;
  font-size: 20px;
  font-weight: 200;
}
.box .content .login-wrapper .login-form .form-item .input-item:focus {
  outline: none;
}
.box .content .login-wrapper .login-form .login-btn {
  width: 100%;
  border-radius: 40px;
  color: #fff;
  border: 0;
  font-weight: 100;
  margin-top: 10px;
  cursor: pointer;
}
.box .content .login-wrapper .divider {
  width: 100%;
  margin: 20px 0;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
}
.box .content .login-wrapper .divider span:nth-child(1) {
  flex: 1;
}
.box .content .login-wrapper .divider span:nth-child(3) {
  flex: 1;
}
.box .content .login-wrapper .divider .line {
  display: inline-block;
  max-width: 30%;
  width: 30%;
}
.box .content .login-wrapper .divider .divider-text {
  vertical-align: middle;
  margin: 0px 20px;
  line-height: 0px;
  display: inline-block;
  width: 100px;
}
.box .content .login-wrapper .other-login-wrapper {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}
.box .content .login-wrapper .other-login-item {
  border: 1px solid rgb(214, 222, 228);
  padding: 10px;
  margin: 10px;
  cursor: pointer;
}

/*一般大于手机的尺寸CSS*/
@media (min-width: 767px) {
  .box {
    background-color: rgb(29, 67, 89);
  }
  .box .content {
    width: 85vw;
    height: 90vh;
    background: url('../img/login_two.jpg') no-repeat;
    background-size: 90% 100%;
    position: absolute;
    right: 15%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 20px;
    background-color: #fff;
  }
  .box .content .login-wrapper {
    width: 25vw;
    position: absolute;
    right: 15%;
    top: 50%;
    transform: translateY(-50%);
  }
  .box .content .login-wrapper h1 {
    text-align: center;
    font-size: 45px;
    color: rgb(81, 100, 115);
    margin-bottom: 40px;
  }
  .box .content .login-wrapper .login-form {
    margin: 10px 0;
  }
  .box .content .login-wrapper .login-form .form-item span {
    color: rgb(81, 100, 115);
  }
  .box .content .login-wrapper .login-form .form-item .input-item {
    height: 60px;
    border: 1px solid rgb(214, 222, 228);
  }
  .box .content .login-wrapper .login-form .login-btn {
    height: 50px;
    background-color: rgb(59, 72, 89);
    font-size: 20px;
  }
  .box .content .login-wrapper .divider .line {
    border-bottom: 1px solid rgb(214, 222, 228);
  }
  .box .content .login-wrapper .other-login-item {
    border-radius: 20px;
  }
  .box .content .login-wrapper .other-login-item img {
    width: 40px;
    height: 40px;
  }
}
/*手机端CSS*/
@media (max-width: 768px) {
  .box .content {
    width: 100vw;
    height: 100vh;
    background: url("../img/login_bg_phone.png") no-repeat;
    background-size: 100% 100%;
    display: flex;
    align-items: flex-start;
    justify-content: center;
  }
  .box .content .login-wrapper {
    width: 70%;
    height: 60%;
    padding-top: 15%;
  }
  .box .content .login-wrapper h1 {
    font-size: 30px;
    color: #fff;
  }
  .box .content .login-wrapper .login-form .form-item {
    margin: 10px 0;
  }
  .box .content .login-wrapper .login-form .form-item span {
    color: rgb(113, 129, 141);
  }
  .box .content .login-wrapper .login-form .form-item .input-item {
    height: 30px;
    border: 1px solid rgb(113, 129, 141);
    background-color: transparent;
    color: #fff;
  }
  .box .content .login-wrapper .login-form .login-btn {
    height: 40px;
    background-color: rgb(235, 95, 93);
    font-size: 16px;
  }
  .box .content .login-wrapper .divider .line {
    border-bottom: 1px solid #fff;
  }
  .box .content .login-wrapper .divider .divider-text {
    color: #fff;
  }
  .box .content .login-wrapper .other-login-item {
    border-radius: 15px;
  }
  .box .content .login-wrapper .other-login-item img {
    width: 35px;
    height: 35px;
  }
}/*# sourceMappingURL=style.css.map */

8. js

index.js

// 五张图片的url
var oImg1 = "indexImg/1.jpg";
var oImg2 = "indexImg/2.jpg";
var oImg3 = "indexImg/3.jpg";
var oImg4 = "indexImg/4.jpg";
var oImg5 = "indexImg/5.jpg";
var oImg6 = "indexImg/6.jpg";
// 把5张图片存入一个数组
var arr = [oImg1, oImg2, oImg3, oImg4, oImg5 ,oImg6];

window.onload = function() {
    //刚加载时第一张图片1号背景颜色
    document.getElementById("1").style.background = "peru";
    run()


}

//轮播
function run() {
    timer = setInterval(function() {
        //随机点数字时能接着变化
        var pic = document.getElementById("insert").name;

        //如果为最后一张图片则重新循环
        if (pic == 5) {
            pic = -1;
        }

        //点一个数字该数字背景颜色变化其余的不变
        var aLi = document.getElementsByTagName("li");
        for (var j = 0; j < aLi.length; j++) {
            aLi[j].style.backgroundColor = "#CCCCCC";
        }

        var i = parseInt(pic);
        //  图片地址
        document.getElementById("insert").src = arr[i + 1];

        document.getElementById("insert").name = i + 1;

        //数字随图片变化
        switch (i) {
            case 0:
                var temp = '2';
                break;
            case 1:
                var temp = '3';
                break;
            case 2:
                var temp = '4';
                break;
            case 3:
                var temp = '5';
                break;
            case 4:
                var temp = '6';
                break;
            case -1:
                var temp = '1';
                break;
        }
        document.getElementById(temp).style.background = "peru"

    }, 5000)
}

//右箭头
function goForward() {
    var temp = document.getElementById("insert").name;
    var oBox = document.getElementById("insert");
    var aLi = document.getElementsByTagName("li");
    // 数字跟着图片一起变
    for (var i = 0; i < aLi.length; i++) {
        aLi[i].style.backgroundColor = "#CCCCCC";
    }

    switch (temp) {
        case "0":
            var n = '2';
            break;
        case "1":
            var n = '3';
            break;
        case "2":
            var n = '4';
            break;
        case "3":
            var n = '5';
            break;
        case "4":
            var n = '6';
            break;
        case "5":
            var n = '1';
            break;
    }

    document.getElementById(n).style.background = "peru"
    // 向右移动图片
    for (var j = 0; j < arr.length; j++) {
        if (j < 5) {
            if (temp == j) {
                oBox.src = arr[j + 1];
            }
        } else {
            if (temp == 5) {
                oBox.src = arr[0];
            }
        }
    }
    // 轮到最后一张图片时返回第一张
    if (temp < 5) {
        oBox.name = parseInt(temp) + 1;
    } else {
        oBox.name = 0;
    }
}

//左箭头
function goBack() {
    var temp = document.getElementById("insert").name;
    var oBox = document.getElementById("insert")
    var aLi = document.getElementsByTagName("li");
    // 图片移动时数字也跟着变
    for (var i = 0; i < aLi.length; i++) {
        aLi[i].style.backgroundColor = "#CCCCCC";
    }

    switch (temp) {
        case "0":
            var n = '6';
            break;
        case "1":
            var n = '1';
            break;
        case "2":
            var n = '2';
            break;
        case "3":
            var n = '3';
            break;
        case "4":
            var n = '4';
            break;
        case "5":
            var n = '5';
            break;
    }

    document.getElementById(n).style.background = "peru"
    // 向左移动图片

    for (var j = 0; j < arr.length; j++) {
        if (j > 0) {
            if (temp == j) {
                oBox.src = arr[j - 1];
            }
        } else {
            if (temp == 0) {
                oBox.src = arr[5];
            }
        }
    }
    // 轮到第一张图片时返回最后一张
    if (temp > 0) {
        oBox.name = parseInt(temp) - 1;
    } else {
        oBox.name = 5;
    }
}

//指定图片
function move(num) {
    var oBox = document.getElementById("insert");
    var temp = document.getElementById("insert").name;
    var aLi = document.getElementsByTagName("li");
    for (var i = 0; i < aLi.length; i++) {
        aLi[i].style.backgroundColor = "#CCCCCC";
    }

    document.getElementById(num.innerHTML).style.background = "peru"

    switch (num.innerHTML) {
        case "1":
            oBox.src = arr[0];
            oBox.name = 0;
            break;
        case "2":
            oBox.src = arr[1];
            oBox.name = 1;
            break;
        case "3":
            oBox.src = arr[2];
            oBox.name = 2;
            break;
        case "4":
            oBox.src = arr[3];
            oBox.name = 3;
            break;
        case "5":
            oBox.src = arr[4];
            oBox.name = 4;
            break;
        case "6":
            oBox.src = arr[5];
            oBox.name = 5;
            break;
    }
}