Spring Cloud Config 使用本地配置文件方式

一、简介

在分布式系统中，由于服务数量巨多，为了方便服务配置文件统一管理，实时更新，所以需要分布式配置中心组件。

在Spring Cloud中，有分布式配置中心组件spring cloud config ，它支持配置服务放在配置服务的内存中（即本地），也支持放在远程Git仓库中。

在spring cloud config 组件中，分两个角色，一是config server，二是config client。

二、配置

2.1 Spring Cloud Config Server项目

1 pom.xml中导入Config Server需要的包

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-server</artifactId>
        </dependency>

2 在Application类中添加@EnableConfigServer注解

package com.sunbufu;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.config.server.EnableConfigServer;
@EnableConfigServer
@SpringBootApplication
public class ConfigServerApplication {
    public static void main(String[] args) {
        SpringApplication.run(ConfigServerApplication.class, args);
    }
}

3 修改配置文件application.yml，指定本地客户端配置文件的路径

spring:
  profiles:
    active: native
  cloud:
    config:
      server:
        native:
          searchLocations: F:/conf

4 准备客户端配置文件

client-dev.yml文件的内容：

server:
  #设置成0，表示任意未被占用的端口
  port: 8081
nickName: world

2.2 Spring Cloud Config Client项目

1 pom.xml中导入Config Client需要的包（注意，此处跟Config Server的配置不同）

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

2 在src/main/resources中，新建bootstrap.yml文件

bootstrap文件会在application文件之前加载，一般是不会变的。

spring:
  application:
    name: client
  cloud:
    config:
      uri: http://127.0.0.1:8888
      profile: dev
      label: master

资源文件映射如下：

/{application}/{profile}[/{label}]
/{application}-{profile}.yml
/{label}/{application}-{profile}.yml
/{application}-{profile}.properties
/{label}/{application}-{profile}.properties

3 新建HelloController用来显示读取到的配置

package com.sunbufu.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 HelloController {
    @Value("${nickName}")
    private String nickName;
    @RequestMapping("/hello")
    public String hello() {
        return "hello " + nickName;
    }
}

三、总结

源码地址 ：https://github.com/sunbufu/sunbufu-cloud

总觉的使用svn或者git不如直接修改配置文件方便，特此记录下来。

spring cloud config本地读取配置文件

1、创建maven项目，引入spring boot 起步依赖

<?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>2.1.7.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.wxz</groupId>
    <artifactId>cloud-config-demo3</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>cloud-config-demo3</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</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>
</project>

新建config-server 模块，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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>com.wxz</groupId>
        <artifactId>cloud-config-demo3</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.wxz</groupId>
    <artifactId>config-server</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>config-server</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-server</artifactId>
            <version>2.1.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

2、配置文件：

spring:
  cloud:
    config:
      server:
        native:
          search-locations: classpath:/shared
  profiles:
    active: native
  application:
    name: config-server
server:
  port: 8769

在resources下新建目录shared，里面新建文件config-client-dev

server:
  port: 8762
foo: foo version 1

在启动类添加

@EnableConfigServer

新建config-client模块

<?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>com.wxz</groupId>
        <artifactId>cloud-config-demo3</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.wxz</groupId>
    <artifactId>config-client</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>config-client</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
            <version>2.1.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

新建配置文件bootstrap.yml(bootstrap比application具有优先的读取顺序)

spring:
  cloud:
    config:
      uri: http://localhost:8769
      fail-fast: true
  application:
    name: config-client
  profiles:
    active: dev

新建一个controller进行测试：

package com.wxz.configclient.controller;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
/**
 * @author Wangxingze
 * @date 2019-08-26 12:58
 */
@RestController
public class Test {
    @Value("${foo}")
    public String  foo;
    @GetMapping("/t")
    public String t(){
        return foo;
    }
}

依次启动server client,启动时可以看到读取了配置文件和启动黛安克，访问：

注意：spring boot 和cloud的版本以及config依赖的版本

<groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.7.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->

我这里好像没有指定spring cloud 的版本呀

config的相关依赖使用：<version>2.1.2.RELEASE</version>

以上为个人经验，希望能给大家一个参考，也希望大家多多支持我们。