0.相关项目环境

由于SpringCloud和SpringBoot有一一对应的关系，因此版本的环境尤其重要
spring boot 2.4.2
spring cloud 2020.0.0

0.1 在Github创建仓库

image.png

编写一个测试的配置文件（为了简便，每个配置文件都这样子写）

config:
  info: "wanna,version=1.0"

官网参考：

https://docs.spring.io/spring-cloud-config/docs/current/reference/html/#_spring_cloud_config_server

1.ConfigServer

1.1引入maven依赖（包括config-server，Eureka等）

<?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>2.4.2</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.wanna</groupId>
    <artifactId>springcloud</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>cloud-config-server3344</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>2020.0.0</spring-cloud.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-server</artifactId>
        </dependency>
        <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-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>
        </repository>
    </repositories>

</project>

1.2主启动类

package com.wanna.springcloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.config.server.EnableConfigServer;

@SpringBootApplication
@EnableConfigServer  //激活配置Server
public class CloudConfigServer3344Application {

    public static void main(String[] args) {
        SpringApplication.run(CloudConfigServer3344Application.class, args);
    }

}

1.3yaml配置文件

server:
  port: 3344

spring:
  application:
    name: cloud-config-server
  cloud:
    config:
      server:
        git:
          uri: https://github.com/wanna280/springcloud-config.git #git仓库名字
          #搜索目录
          username: xxxxx  #github用户名，一般是邮箱
          password: xxxxx  #密码
          search-paths:
            - springcloud-config  #github的搜索路径，根据自己来写
        bootstrap: true
      label: main  #分支

eureka:
  client:
    fetch-registry: true
    register-with-eureka: true #将自己注册进Eureka
    service-url:  #Eureka服务的URL
      defaultZone: http://localhost:7001/eureka

2.ConfigClient

在SpringBoot2.4.x中客户端加载云端的配置文件需要引入依赖，但是在之前的版本中是不需要这个依赖的，默认就能加载（baidu了好久没找到解决办法，我还以为是我的什么什么有问题了，于是我上SpringCloud官网才发现了，果然官网才是无敌的）

image.png

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bootstrap</artifactId>
        </dependency>

2.1 引入maven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 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>2.4.2</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.wanna</groupId>
    <artifactId>springcloud</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>cloud-config-client3355</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>2020.0.0</spring-cloud.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bootstrap</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
        <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>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-context</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <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>
        </repository>
    </repositories>

</project>

2.2 主启动类

package com.wanna.springcloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;

@SpringBootApplication
@EnableEurekaClient
public class CloudConfigClient3355Application {

    public static void main(String[] args) {
        SpringApplication.run(CloudConfigClient3355Application.class, args);
    }

}

2.3 yaml配置文件(bootstrap.yaml)

eureka:
  client:
    fetch-registry: false
    register-with-eureka: false
    service-url:
      defaultZone: http://localhost:7001/eureka

server:
  port: 3355

spring:
  application:
    name: cloud-config-client
  cloud:
    config:
      uri:
        - http://localhost:3344
      label: main
      name: config
      profile: dev



#优先级比application.yaml
#bootstrap.yaml是系统级，application.yaml是用户级
#bootstrap.yaml从云端加载配置

2.4 编写一个测试的Controller，测试我们的云端配置文件已经被加载

package com.wanna.springcloud.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class ConfigController {
    @Value("${config.info}")
    private String configInfo;

    @RequestMapping("/configInfo")
    public String GetConfigInfo(){
        return configInfo;
    }

    @RequestMapping("/test")
    public String GetMap(){
        return "3344";
    }


}

3.作用

SpringCloudConfig为我们提供了云端读取配置文件的方法，我们可以很多的微服务都引用同一个配置文件，保证配置文件的统一，也能避免配置文件的冗余，多个配置文件必定会有很多配置文件的冗余，可以提供公共的部分放在云端~