Spring Cloud微服务集成配置中心

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1. 搭建Spring Cloud Config配置中心（见上一篇博客）

2. 创建微服务项目bounter-simon-app，pom文件如下：

<?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>cn.bounter</groupId>
    <artifactId>bounter-simon-app</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>bounter-simon-app</name>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.4.RELEASE</version>
    </parent>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Finchley.SR1</spring-cloud.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>
        </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>

3. 配置从配置中心获取配置信息，application.properties文件如下：

server.port=8081

# 配置中心仓库的配置文件名
spring.application.name=simon
# 配置中心服务器地址
spring.cloud.config.uri=http://localhost:8888

4.控制器返回从配置中心获取到的配置信息，SimonController.java 内容如下：

@RestController
@CrossOrigin
@RequestMapping("/api/simon")
public class SimonController {

    @Value("${name}")
    private String name;
    
    @GetMapping("/name")
    public ResponseData<?> get() {
        return new ResponseData<>().success().data(name);
    }

}

5. 启动bounter-simon-app服务，浏览器访问：http://localhost:8081/api/simon/name，页面如下：

{
　　success: true,
　　data: "simon",
　　errorMsg: null,
　　timestamp: 1534917807,
　　sign: null
}

data里就显示了从配置中心获取到的name属性值，是不是觉得很简单啊，那就自己动手试一试吧！

源代码Github地址：

https://github.com/13babybear/bounter-simon-app

https://github.com/13babybear/bounter-susan-app