Spring Cloud + Vue前后端分离-第2章 使用Maven搭建SpringCloud项目

Maven两大核心功能

        依赖管理(Jar管理

        构建项目(项目打包

使用Eureka搭建注册中心

使用spring initializr创建spring cloud项目

SpringCloud和Maven简介

SpringBoot和SpringCloud:SpringBoot是单应用开发框架,SpringCloud是管理多个SpringBoot应用的微服务框架

GENERATE下载可以

下载完成后是个压缩包解压后,打开idea点击filer>open可以导入项目了

项目初始化,要把代码管理优先做后,不管是学习还是工作,养成阶段提交代码的习惯。代码管理选择git

一个项目里不是所有的文件需要提交到git,比如.iml这个idea本地项目文件比如maventarget文件夹。所以用.gitignore我们自动排除

1.增加eureka模块作为注册服务端

2.将单maven项目改造成maven子项目

pom.xml(course)

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.2.2.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.course</groupId>
	<artifactId>course</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>pom</packaging>
	<name>course</name>
	<description>Demo project for Spring Boot</description>
	<modules>
		<module>eureka</module>
	</modules>
	<properties>
		<java.version>1.8</java.version>
		<spring-cloud.version>Hoxton.RELEASE</spring-cloud.version>
	</properties>
	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>
	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>${spring-cloud.version}</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
		</dependencies>
	</dependencyManagement>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>
	<repositories>
		<repository>
			<id>spring-milestones</id>
			<name>Spring Milestones</name>
			<url>https://repo.spring.io/milestone</url>
			<snapshots>
				<enabled>false</enabled>
			</snapshots>
		</repository>
	</repositories>

</project>

pom.xml(eureka)

<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>
    <parent>
        <groupId>com.course</groupId>
        <artifactId>course</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>

    <artifactId>eureka</artifactId>
    <packaging>jar</packaging>

    <name>eureka</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>
    </dependencies>
</project>

搭建业务模块system

1.解决注册中心服务启动失败问题
1.解决注册中心服务启动失败问题

支持application.properties或application.yml文件默认读取resources目录下或resources/config目录下,后续会有读/config目录示例

spring.application.name=eureka
server.port=8761
eureka.client.fetch-registry=false
eureka.client.register-with-eureka=false

springboot默认集成slf4j框架,它定义了一些日志接口规范日志输出,真正的实现logbacklog4j,我们代码中写的都是slf4j的代码

2.优化启动日志显示

启动日志可以按需扩展,甚至可以打印一些有趣的字符

package com.course;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.core.env.Environment;

/**
 * Hello world!
 *
 */
@SpringBootApplication
@EnableEurekaServer
public class EurekaApplication {

    private static final Logger logger = LoggerFactory.getLogger(EurekaApplication.class);
    //    public static void main(String[] args) {
//        SpringApplication.run(EurekaApplication.class, args);
//    }
    public static void main(String[] args) {

        SpringApplication app = new SpringApplication(EurekaApplication.class);
        Environment env = app.run(args).getEnvironment();
        logger.info("启动成功!!");
        logger.info("Eureka地址: thttp://127.0.0.1:{}", env.getProperty("server.port"));
    }

}

logback.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <!-- 修改一下路径-->
    <property name="PATH" value="/log/imooc/course/eureka"></property>

    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
<!--            <Pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %highlight(%-5level) %blue(%-50logger{50}:%-4line) %msg%n</Pattern>-->
            <Pattern>%d{ss.SSS} %highlight(%-5level) %blue(%-30logger{30}:%-4line) %msg%n</Pattern>
        </encoder>
    </appender>

    <appender name="TRACE_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>${PATH}/trace.log</file>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <FileNamePattern>${PATH}/trace.%d{yyyy-MM-dd}.%i.log</FileNamePattern>
            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>10MB</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
        </rollingPolicy>
        <layout>
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %-5level %-50logger{50}:%-4line %green(%-8X{UUID}) %msg%n</pattern>
        </layout>
    </appender>

    <appender name="ERROR_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>${PATH}/error.log</file>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <FileNamePattern>${PATH}/error.%d{yyyy-MM-dd}.%i.log</FileNamePattern>
            <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                <maxFileSize>10MB</maxFileSize>
            </timeBasedFileNamingAndTriggeringPolicy>
        </rollingPolicy>
        <layout>
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %-5level %-50logger{50}:%-4line %green(%-8X{UUID}) %msg%n</pattern>
        </layout>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>ERROR</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>

    <root level="ERROR">
        <appender-ref ref="ERROR_FILE" />
    </root>

    <root level="TRACE">
        <appender-ref ref="TRACE_FILE" />
    </root>

    <root level="INFO">
        <appender-ref ref="STDOUT" />
    </root>
</configuration>

建议:养成阶段提交代码的习惯,可以完成一个小功能。并且每天下班前提交本地代码,前提是不能编译报错影响已有的功能 

2.新建Maven子项目system

maven父子模块配置: 在子模块中使用parent标签指向模块,在父模块中使用module标签引入模块

system配置成最简单的SpringBoot项目

(注意:javaresources同级目录!!!小编大意,求原谅)

package com.course.system;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.core.env.Environment;


@SpringBootApplication

public class SystemApplication {

    private static final Logger logger = LoggerFactory.getLogger(SystemApplication.class);

    public static void main(String[] args) {

        SpringApplication app = new SpringApplication(SystemApplication.class);
        Environment env = app.run(args).getEnvironment();
        logger.info("启动成功!!");
        logger.info("System地址: thttp://127.0.0.1:{}", env.getProperty("server.port"));
    }

}
spring.application.name=system
server.port=9001

<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>
    <parent>
        <groupId>com.course</groupId>
        <artifactId>course</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>

    <artifactId>system</artifactId>
    <packaging>jar</packaging>
    <dependencies>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    </dependencies>
</project>

3.将system注册到注册中心

第1步:增加eureka-client依赖

第2步:增加配置指向注册中心地址

第3步:增加@EnableEurekaClient

搭建路由模块-gateway

SpringCloug网关组件可以gateway或zuul,最早使用的是zuul,后面spring自己出了gateway

网关主要功能:

        限流(流量控制);

        重试(请求失败重试慎用);

        跨域(前后端不在同一个域);

        路由(转发请求);

        鉴权(登录校验签名校验)等…

新建Maven子项目gateway

步骤system模块一样改一些参数

新增gateway子模块,增加gateway依赖,并注册到注册中心

(注意:javaresources同级目录!!!小编大意,求原谅) 

spring.application.name=gateway
server.port=9000
eureka.client.service-url.defaultZone=http://localhost:8761/eureka/

#路由转发
spring.cloud.gateway.routes[0].id=system
spring.cloud.gateway.routes[0].uri=http://127.0.0.1:9001
spring.cloud.gateway.routes[0].predicates[0].name=Path
spring.cloud.gateway.routes[0].predicates[0].args[0]=/system/**

<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>
    <parent>
        <groupId>com.course</groupId>
        <artifactId>course</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>

    <artifactId>gateway</artifactId>
    <packaging>jar</packaging>
    <dependencies>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
    </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
        </dependency>
    </dependencies>
</project>

路由转发

路由转发:将外部请求转发到实际的业务模块进行处理

1.在gateway增加system路由转发配置调试成功

我们做的所有的改动都需要重启应用才能生效,后续我们介绍部署,不再需要手动重启,从而提高开发效率

原文地址:https://blog.csdn.net/qq_52963857/article/details/134773712

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