Spring Cloud 配置 Druid（二）

本文介绍: 不废话，直接上代码，Nacos搭建的微服务，可以看。

不废话，直接上代码，

Nacos搭建的微服务，可以看Spring Cloud 配置 Nacos（一）-CSDN博客

一，pom文件

spring-cloud-starter-alibaba-nacos-discovery 和 spring-cloud-starter-openfeign

都是基于spring-cloud-alibaba-dependencies

版本为：2022.0.0.0

<!-- mybatis-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.5.4.1</version>
        </dependency>

        <!-- pojo持久化使用 -->
        <dependency>
            <groupId>jakarta.persistence</groupId>
            <artifactId>jakarta.persistence-api</artifactId>
            <version>3.1.0</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.mysql/mysql-connector-j -->
        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
            <version>8.2.0</version>
        </dependency>
        <!--  druid数据源      -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.2.20</version>
        </dependency>
        <!-- 引入alibaba-nacos-discovery依赖，发现服务 -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <!-- 引入alibaba-nacos-config依赖，可以从Nacos配置中心获得配置信息 -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
        </dependency>

二，修改Nacos的配置文件

配置了druid

spring:
  datasource:
    username: root
    password: root
    url: jdbc:mysql://localhost:3306/test1?useSSL=false&useUnicode=true&characterEncoding=utf-8&serverTimezone=UTC
    driver-class-name: com.mysql.cj.jdbc.Driver
    type: com.alibaba.druid.pool.DruidDataSource
    initialSize: 5
    minIdle: 5
    maxActive: 20
    maxWait: 60000
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: SELECT 1 FROM DUAL
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    poolPreparedStatements: true
    filters: stat,wall,log4j
    maxPoolPreparedStatementPerConnectionSize: 20
    useGlobalDataSourceStat: true
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

name: hello world!

mybatis-plus:
  configuration:
    map-underscore-to-camel-case: false

三，配置model,dao,controller

演示就不创建service了。

model

import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableField;
import com.baomidou.mybatisplus.annotation.TableId;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.io.Serializable;

@Data
@NoArgsConstructor
@AllArgsConstructor
public class User implements Serializable {
    @TableId(value = "id",type = IdType.AUTO)
    private Integer id;
    @TableField(value = "name")
    private String name;
    @TableField(value = "schoolId")
    private Integer schoolId;
}

dao

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.kintech2.test.model.User;
import org.apache.ibatis.annotations.Mapper;

@Mapper
public interface UserDao extends BaseMapper<User> {
}

controller

import com.alibaba.nacos.api.model.v2.Result;
import com.kintech2.test.mapper.UserDao;
import com.kintech2.test.model.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("api/test")
@RefreshScope
public class ApiTestController {

    @Autowired
    private UserDao userDao;

    @RequestMapping(value = "test2", method = RequestMethod.GET)
    @ResponseBody
    public Result test2(Integer id){
        User user=userDao.selectById(id);
        return Result.success(user.getName());
    }
}

四，配置Druid的监控

由于最新版本druid，还使用的javax.servlet，此处无法匹配jakarta.servlet。

所以目前要等druid更新，因此注释此配置类

import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import jakarta.servlet.Filter;
import jakarta.servlet.Servlet;

/**
 * 新版本Druid的监控还使用javax，无法匹配jakarta
 */
@Configuration
public class DruidConfig {

    @Bean
    @ConditionalOnMissingBean
    public ServletRegistrationBean<Servlet> druidServlet() {
        ServletRegistrationBean<Servlet> servletRegistrationBean = new ServletRegistrationBean<Servlet>(new StatViewServlet(), "/druid/*");

        //白名单：
        servletRegistrationBean.addInitParameter("allow", "127.0.0.1");
        //IP黑名单 (存在共同时，deny优先于allow) : 如果满足deny的话提示:Sorry, you are not permitted to view this page.
//        servletRegistrationBean.addInitParameter("deny", "192.168.1.119");
        //登录查看信息的账号密码, 用于登录Druid监控后台
        servletRegistrationBean.addInitParameter("loginUsername", "admin");
        servletRegistrationBean.addInitParameter("loginPassword", "admin");
        //是否能够重置数据.
        servletRegistrationBean.addInitParameter("resetEnable", "true");
        return servletRegistrationBean;

    }

    /**
     * 注册Filter信息, 监控拦截器
     *
     * @return
     */
    @Bean
    @ConditionalOnMissingBean
    public FilterRegistrationBean<Filter> filterRegistrationBean() {
        FilterRegistrationBean<Filter> filterRegistrationBean = new FilterRegistrationBean<Filter>();
        filterRegistrationBean.setFilter(new WebStatFilter());
        //添加过滤规则.
        filterRegistrationBean.addUrlPatterns("/*");
        //添加不需要忽略的格式信息.
        filterRegistrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
        return filterRegistrationBean;
    }
}