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
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.git.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
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
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