Spring Cloud Config入门（本地配置）

柔情只为你懂 2022-04-23 02:10 186阅读 0赞

转载自 [https://www.cnblogs.com/zcr3108346262/p/7602314.html][https_www.cnblogs.com_zcr3108346262_p_7602314.html]

spring cloud config 简介

*  Spring Cloud Config为分布式系统中的外部化配置提供服务器和客户端支持。使用Config Server，您可以在所有环境中管理应用程序的外部属性。
 *  Spring Cloud Config 分为两个部分 ，server端和client端。

server端配置服务器，管理配置信息

client端获取配置信息

创建并运行一个Spring Cloud Config Server

*  创建一个名为config-server的应用,并添加spring-cloud-starter-parent,spring-cloud-config-server依赖,pom信息具体如下
    
    ![复制代码][copycode.gif]
    
        <?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>com.zcr.test</groupId>
            <artifactId>config-server</artifactId>
            <version>1.0-SNAPSHOT</version>
            <packaging>jar</packaging>
            <name>config-server</name>
            <description>Demo project for Spring Boot</description>
            <parent>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-parent</artifactId>
                <version>1.5.2.RELEASE</version>
            </parent>
            <properties>
                <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
                <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
                <java.version>1.8</java.version>
            </properties>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-config-server</artifactId>
                </dependency>
        
                <dependency>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-test</artifactId>
                    <scope>test</scope>
                </dependency>
        
                <dependency>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-starter-eureka</artifactId>
                </dependency>
            </dependencies>
            <dependencyManagement>
                <dependencies>
                    <dependency>
                        <groupId>org.springframework.cloud</groupId>
                        <artifactId>spring-cloud-dependencies</artifactId>
                        <version>Camden.SR6</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>
    
    ![复制代码][copycode.gif]
 *  创建application主类，并添加@EnableConfigServer注解，代码如下
    
    ![复制代码][copycode.gif]
    
        package com.zcr.spring;
        
        import org.springframework.boot.SpringApplication;
        import org.springframework.boot.autoconfigure.SpringBootApplication;
        import org.springframework.cloud.config.server.EnableConfigServer;
        
        @SpringBootApplication
        @EnableConfigServer
        public class ConfigServerApplication {
            public static void main(String[] args) {
                SpringApplication.run(ConfigServerApplication.class,args);
            }
        }
    
    ![复制代码][copycode.gif]
 *  在本地创建一个配置文件db-service-dev.properties，格式如下
    
    按 Ctrl+C 复制代码
    
    按 Ctrl+C 复制代码
 *  在resources文件夹下创建application.properties，内容如下
    
        #tomcat端口号
        server.port=8888
        #配置文件在本地
        spring.profiles.active=native
        #配置文件的目录
        spring.cloud.config.server.native.search-locations=D:/workspace/GitHub/spring-config/config-file
    
          目录结构：

[![1506497479(1)][1506497479_1]][1506497479_1_1506497479_1]

*  运行应用并打开网址[http://localhost:8888/db-service/dev][http_localhost_8888_db-service_dev]，出现如下页面，证明配置文件发布成功

[![image][]][image 1]

创建并运行一个Spring Cloud Config Client

*  创建一个名为config-client的应用,并添加spring-cloud-starter-parent,spring-cloud-starter-config,spring-boot-starter-web依赖,pom信息具体如下
    
    ![复制代码][copycode.gif]
    
        <?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>com.zcr.spring</groupId>
            <artifactId>config-client</artifactId>
            <version>1.0-SNAPSHOT</version>
            <parent>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-parent</artifactId>
                <version>1.5.2.RELEASE</version>
            </parent>
            <properties>
                <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
                <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
                <java.version>1.8</java.version>
            </properties>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-starter-config</artifactId>
                </dependency>
        
                <dependency>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-web</artifactId>
                </dependency>
        
                <dependency>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-test</artifactId>
                    <scope>test</scope>
                </dependency>
            <dependencyManagement>
                <dependencies>
                    <dependency>
                        <groupId>org.springframework.cloud</groupId>
                        <artifactId>spring-cloud-dependencies</artifactId>
                        <version>Dalston.RC1</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>
    
    ![复制代码][copycode.gif]
 *  在resources中创建bootstrap.properties（bootstrap.yml会在应用启动之前读取），格式如下
    
    ![复制代码][copycode.gif]
    
        #文件名
        spring.application.name=db-service
        #文件模式，默认为default
        spring.cloud.config.profile=dev
        #server端ip地址
        spring.cloud.config.uri= http://localhost:8888/
        #client端ip端口
        server.port=8881
    
    ![复制代码][copycode.gif]
 *  创建一个controller
    
    ![复制代码][copycode.gif]
    
        package com.zcr.spring;
        
        import org.springframework.beans.factory.annotation.Value;
        import org.springframework.boot.SpringApplication;
        import org.springframework.boot.autoconfigure.SpringBootApplication;
        import org.springframework.web.bind.annotation.RequestMapping;
        import org.springframework.web.bind.annotation.RestController;
        
        @SpringBootApplication
        @RestController
        public class ConfigClientApplication {
            public static void main(String[] args) {
                SpringApplication.run(ConfigClientApplication.class, args);
            }
            @Value("${sck.user}")
            String sckUser;
            @Value("${sck.password}")
            String sckPassword;
        
            @RequestMapping("/hello")
            public String showUserAndPassword(){
                String sb = "username is " + sckUser + "," + "password is " +sckPassword;
                return sb;
            }
        }
    
    ![复制代码][copycode.gif]
 *  启动Application，并访问[http://localhost:8881/hello][http_localhost_8881_hello]，出现如下界面，成功

[![image][image 2]][image_image 2]

遗留问题：1.初始化时，注入在static代码块之后，故静态代码块无法获取远程配置信息。

2.对spring了解浅。不懂内部原理，bug调试过程中比较费劲。

3.对spring中的注解不了解。

源码地址：[https://github.com/310834626/spring-cloud-config][https_github.com_310834626_spring-cloud-config]

参考：[http://www.jianshu.com/p/69dea19abf04][http_www.jianshu.com_p_69dea19abf04]

[http://blog.didispace.com/springcloud4/][http_blog.didispace.com_springcloud4]

[http://tech.lede.com/2017/06/12/rd/server/springCloudConfig/][http_tech.lede.com_2017_06_12_rd_server_springCloudConfig]

[https_www.cnblogs.com_zcr3108346262_p_7602314.html]: https://www.cnblogs.com/zcr3108346262/p/7602314.html
[copycode.gif]: /images/20220323/c9275e4c218f48a298b1feedb59db3b9.png
[1506497479_1]: https://images2017.cnblogs.com/blog/1028204/201709/1028204-20170927161121247-1621101836.png
[1506497479_1_1506497479_1]: /images/20220323/63596b406bc6411c80d67702d05200f3.png
[http_localhost_8888_db-service_dev]: http://localhost:8888/db-service/dev
[image]: /images/20220323/bb49d649673a4660a92ecfe2c4cf3953.png
[image 1]: http://images2017.cnblogs.com/blog/1028204/201709/1028204-20170927161121653-1242630831.png
[http_localhost_8881_hello]: http://localhost:8881/hello
[image 2]: https://images2017.cnblogs.com/blog/1028204/201709/1028204-20170927161122794-190135836.png
[image_image 2]: /images/20220323/a9d9a105ea8f4497857549ac372258da.png
[https_github.com_310834626_spring-cloud-config]: https://github.com/310834626/spring-cloud-config
[http_www.jianshu.com_p_69dea19abf04]: http://www.jianshu.com/p/69dea19abf04
[http_blog.didispace.com_springcloud4]: http://blog.didispace.com/springcloud4/
[http_tech.lede.com_2017_06_12_rd_server_springCloudConfig]: http://tech.lede.com/2017/06/12/rd/server/springCloudConfig/