详解利用SpringCloud搭建一个最简单的微服务框架

详解利用SpringCloud搭建一个最简单的微服务框架

Spring Cloud是一个基于Spring Boot实现的云应用开发工具，它为基于JVM的云应用开发中的配置管理、服务发现、断路器、智能路由、微代理、控制总线、全局锁、决策竞选、分布式会话和集群状态管理等操作提供了一种简单的开发方式。

Spring Cloud包含了多个子项目（针对分布式系统中涉及的多个不同开源产品），比如：Spring Cloud Config、Spring Cloud Netflix、Spring Cloud CloudFoundry、Spring Cloud AWS、Spring Cloud Security、Spring Cloud Commons、Spring Cloud Zookeeper、Spring Cloud CLI等项目。

1.微服务

微服务主要包含服务注册，服务发现，服务路由，服务配置，服务熔断，服务降级等一系列的服务，而Spring Cloud为我们提供了个一整套的服务；

本例子为你提供了最简单的一个服务发现例子，包含服务注册发现spingCloudEurekaServer、服务配置中心spingCloudConfServer、以及一个app应用springCloudApp

2.服务注册与发现

spingCloudEurekaServer

pom.xml

4.0.0

com.caicongyang

spingCloudEurekaServer

0.0.1-SNAPSHOT

org.springframework.cloud

spring-cloud-starter-parent

Angel.SR6

org.springframework.cloud

spring-cloud-starter-eureka-server

org.springframework.boot

spring-boot-maven-plugin

Application.java

package com.caicongyang.eureka;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

/**

* Spring could EurekaServer程序主入口

*

* @author Administrator

*

*/

@SpringBootApplication

@EnableEurekaServer

public class Application {

public static void main(String[] args) {

SpringApplication.run(Application.class, args);

}

}

application.yml  （可用properties替代）

server:

port: 9999

eureka:

instance:

hostname: 127.0.0.1

client:

registerWithEureka: false

fetchRegistry: false

serviceUrl:

defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

3.服务配置（全局配置中心）

pom.xml

xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

4.0.0

com.caicongyang

spingCloudConfServer

0.0.1-SNAPSHOT

org.springframework.cloud

spring-cloud-starter-parent

Angel.SR6

org.springframework.cloud

spring-cloud-config-server

org.springframework.cloud

spring-cloud-starter-eureka

org.springframework.boot

spring-boot-starter-test

test

org.springframework.boot

spring-boot-maven-plugin

compile

xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

4.0.0

com.caicongyang

spingCloudConfServer

0.0.1-SNAPSHOT

org.springframework.cloud

spring-cloud-starter-parent

Angel.SR6

org.springframework.cloud

spring-cloud-config-server

org.springframework.cloud

spring-cloud-starter-eureka

org.springframework.boot

spring-boot-starter-test

test

org.springframework.boot

spring-boot-maven-plugin

compile

application.java

package com.caiconyang.conf;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.cloud.config.server.EnableConfigServer;

/**

* Spring could conf程序主入口

* @author Administrator

*

*/

@SpringBootApplication

@EnableConfigServer

public class Application {

public static void main(String[] args) {

SpringApplication.run(Application.class,args);

}

}

application.properties

server.port=8888

## App配置文件所在git地址

spring.cloud.config.server.giCufSDiIDzot.uri=https://git.oschina.net/caicongyang/springCloudConfigRepo.git

spring.cloud.config.server.git.searchPaths=repo

spring.application.name=spingCloudConfServer

4.App

pom.xml

4.0.0

com.caicongyang

springCloudApp

0.0.1-SNAPSHOT

org.springframework.cloud

spring-cloud-starter-parent

Angel.SR6

UTF-8

1.7

UTF-8

2.2.2

org.springframework.boot

spring-boot-starter-web

org.springframework.boot

spring-boot-starter-actuator

org.springframework.cloud

spring-cloud-starter-config

org.springframework.cloud

spring-cloud-starter-eureka

org.springframework.cloud

spring-cloud-starter-hystrix

org.springframework.boot

spring-boot-starter-test

test

io.springfox

springfox-swagger2

${springfox.swagger.version}

io.springfox

springfox-swagger-ui

${springfox.swagger.version}

spingcould

org.apache.maven.plugins

maven-compiler-plugin

${java.version}

${java.version}

${java.encoding}

true

Application.java

package com.caicongyang.springCloudApp.main;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.EnableAutoConfiguration;

import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

import org.springframework.context.annotation.ComponentScan;

import org.springframework.context.annotation.Configuration;

/**

* Spring could web程序主入口

* @author Administrator

*

*/

@Configuration//配置控制

@EnableAutoConfiguration//启用自动配置

@ComponentScan(value={"com.caicongyang.springCloudApp"})//组件扫描

@EnableDiscoveryClient

public class Application {

public static void main(String[] args) {

//第一个简单的应用，

SpringApplication.run(Application.class,args);

}

}

SwaggerConfig.java

package com.caicongyang.springCloudApp.conf;

import org.springframework.beans.factory.annotation.Value;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

import springfox.documentation.service.ApiInfo;

import springfox.documentation.spi.DocumentationType;

import springfox.documentation.spring.web.plugins.Docket;

import springfox.documentation.swagger2.annotations.EnableSwagger2;

/**

*

* @author caicongyang1

* @version id: SwaggerConfig, v 0.1 16/4/22 下午4:12 caicongyang1 Exp $$

*/

@Configuration

@EnableSwagger2

public class SwaggerConfig {

@Value("${swagger.ui.enable}") //该配置项在配置中心管理

private boolean environmentSpecificBooleanFlag;

@Bean

public Docket docketFactory() {

return new Docket(DocumentationType.SWAGGER_2).apiInfo(

new ApiInfo("接口文档", "SpingCloud web接口列表", "1.0", "", "", "", "")).enable(environmentSpecificBooleanFlag);

}

}

application.properties

server.port=8080

spring.cloud.config.uri=http://127.0.0.1:8888

spring.cloud.config.name=springCloudApp

spring.cloud.config.profile=${config.profile:dev}

#service discovery url

eureka.client.serviceUrl.defaultZone=http://localhost:9999/eureka/

#service name

spring.application.name=springCloudApp

5.测试与验证

顺序启动服务注册发现spingCloudEurekaServer、服务配置中心spingCloudConfServer、以及一个app应用springCloudApp

测试与验证

1.访问http://localhost:9999/eureka/  app是否已经注册上来

2.访问 http://localhost:8080/swagger-ui.html 是否正常访问，如果正常访问说明争取读取到config配置中心的swagger.ui.enable配置项

6.源码：以上所有源码：springcloud_jb51.rar

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