spring cloud学习入门之config配置教程

前言

本文主要给大家分享了关于spring cloud的入门教程，主要介绍了config配置的相关内容，下面话不多说了，来一起看看看详细的介绍吧。

简介

Spring cloud config 分为两部分 server client

• config-server 配置服务端，服务管理配置信息
• config-client 客户端，客户端调用server端暴露接口获取配置信息
  

config-server

创建config-server

首先创建config-server工程.

文件结构：

├── config-server.iml
├── pom.xml
└── src
 ├── main
 │ ├── java
 │ │ └── com
 │ │ └── lkl
 │ │ └── springcloud
 │ │ └── config
 │ │  └── server
 │ │  └── Application.java
 │ └── resources
 │ ├── application.properties
 │ └── bootstrap.properties
 └── test
 └── java

pom.xml内容：

<?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>

 <parent>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-parent</artifactId>
 <version>1.2.3.RELEASE</version>
 <relativePath /> <!-- lookup parent from repository -->
 </parent>

 <groupId>com.lkl.springcloud</groupId>
 <artifactId>spring-cloud-config-server</artifactId>
 <version>1.0-SNAPSHOT</version>

 <dependencyManagement>
 <dependencies>
 <dependency>
 <groupId>org.springframework.cloud</groupId>
 <artifactId>spring-cloud-config</artifactId>
 <version>1.0.4.RELEASE</version>
 <type>pom</type>
 <scope>import</scope>
 </dependency>
 </dependencies>
 </dependencyManagement>
 <dependencies>
 <dependency>
 <groupId>org.springframework.cloud</groupId>
 <artifactId>spring-cloud-starter-config</artifactId>
 </dependency>

 <!--表示为web工程-->
 <dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-web</artifactId>
 </dependency>

 <!--暴露各种指标-->
 <dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-actuator</artifactId>
 </dependency>

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

 </dependencies>

 <build>
 <plugins>
 <plugin>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-maven-plugin</artifactId>
 </plugin>
 </plugins>
 </build>

</project>

创建启动类

Application.Java

package com.lkl.springcloud.config.server;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.cloud.config.server.EnableConfigServer;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.bind.annotation.RestController;

/**
 * Created by liaokailin on 16/4/28.
 */
@Configuration
@EnableAutoConfiguration
@RestController
@EnableConfigServer
public class Application {

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

其中 @EnableConfigServer为关键注解

在resources文件下创建application.properties

server.port=8888

配置工程监听端口8888，默认情况下client通过读取http://localhost:8888获取配置信息

创建bootstrap.properties

spring.cloud.config.server.git.uri: https://github.com/liaokailin/config-repo

该配置信息通过fork https://github.com/spring-cloud-samples/config-repo （本地下载）得到

通过spring.cloud.config.server.Git.uri指定配置信息存储的git地址

运行config-server

spring boot工程很方便启动，运行Application.java即可

获取git上的资源信息遵循如下规则：

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

application:表示应用名称,在client中通过spring.config.name配置

profile:表示获取指定环境下配置，例如开发环境、测试环境、生产环境 默认值default，实际开发中可以是 dev、test、demo、

production等

label: git标签，默认值master

如果application名称为foo，则可以采用如下方式访问：

http://localhost:8888/foo/default

http://localhost:8888/foo/development

只要是按照上面的规则配置即可访问.

config-client

创建config-client

目录结构如下：

├── pom.xml
├── spring-cloud-config-client.iml
└── src
 ├── main
 │ ├── java
 │ │ └── com
 │ │ └── lkl
 │ │ └── springcloud
 │ │ └── config
 │ │  └── client
 │ │  └── Application.java
 │ └── resources
 │ └── bootstrap.yml
 └── test
 └── java

pom.xml

<?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.lkl.springcloud</groupId>
 <artifactId>spring-cloud-config-client</artifactId>
 <version>1.0-SNAPSHOT</version>


 <parent>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-parent</artifactId>
 <version>1.2.3.RELEASE</version>
 <relativePath /> <!-- lookup parent from repository -->
 </parent>

 <dependencyManagement>
 <dependencies>
 <dependency>
 <groupId>org.springframework.cloud</groupId>
 <artifactId>spring-cloud-starter-parent</artifactId>
 <version>1.0.1.RELEASE</version>
 <type>pom</type>
 <scope>import</scope>
 </dependency>
 </dependencies>
 </dependencyManagement>


 <dependencies>
 <dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-web</artifactId>
 </dependency>
 <dependency>
 <groupId>org.springframework.cloud</groupId>
 <artifactId>spring-cloud-config-client</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>
 <repositories>
 <repository>
 <id>spring-milestones</id>
 <name>Spring Milestones</name>
 <url>http://repo.spring.io/milestone</url>
 <snapshots>
 <enabled>false</enabled>
 </snapshots>
 </repository>
 </repositories>
 <pluginRepositories>
 <pluginRepository>
 <id>spring-milestones</id>
 <name>Spring Milestones</name>
 <url>http://repo.spring.io/milestone</url>
 <snapshots>
 <enabled>false</enabled>
 </snapshots>
 </pluginRepository>
 </pluginRepositories>

 <build>
 <plugins>
 <plugin>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-maven-plugin</artifactId>
 </plugin>
 </plugins>
 </build>
</project>

创建启动类Application.java

package com.lkl.springcloud.config.client;

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;

/**
 * Created by liaokailin on 16/4/28.
 */
@SpringBootApplication
@RestController
public class Application {
 @Value("${name:World!}")
 String bar;

 @RequestMapping("/")
 String hello() {
 return "Hello " + bar + "!";
 }

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

创建bootstrap.properties文件，其内容如下：

spring.application.name: foo
spring.cloud.config.env:default
spring.cloud.config.label:master
spring.cloud.config.uri:http://localhost:8888

其中 spring.application.name 为应用名称，spring.cloud.config.uri 配置config-server暴露的获取配置接口,其默认值为http://localhost:8888

第二三项配置在前面已经提到过，配置的都为默认值，因此bootstrap.properties只需要配置应用名即可.

运行config-client

访问 http://localhost 得到 `Hello liaokailin` 获取到git上的配置信息

访问 http://localhost/env 得到所有的配置信息，可以发现获取配置信息成功.

{
profiles: [ ],
configService:https://github.com/liaokailin/config-repo/foo.properties: {
name: "liaokailin",
foo: "devoxxfr"
},
configService:https://github.com/liaokailin/config-repo/application.yml: {
info.description: "Spring Cloud Samples--lkl",
info.url: "https://github.com/spring-cloud-samples",
eureka.client.serviceUrl.defaultZone: "http://localhost:8761/eureka/"
},
commandLineArgs: {
spring.output.ansi.enabled: "always"
},
servletContextInitParams: { },
...}

ok ~ it's work ! more about is here（本地下载）

总结

以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作能带来一定的帮助，如果有疑问大家可以留言交流，谢谢大家对小牛知识库的支持。