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
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< 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.caicongyang</ groupId > < artifactId >spingCloudEurekaServer</ artifactId > < version >0.0.1-SNAPSHOT</ version > < parent > < groupId >org.springframework.cloud</ groupId > < artifactId >spring-cloud-starter-parent</ artifactId > < version >Angel.SR6</ version > </ parent > < dependencies > < dependency > < groupId >org.springframework.cloud</ groupId > < artifactId >spring-cloud-starter-eureka-server</ artifactId > </ dependency > </ dependencies > < build > < plugins > < plugin > < groupId >org.springframework.boot</ groupId > < artifactId >spring-boot-maven-plugin</ artifactId > </ plugin > </ plugins > </ build > </ project > |
Application.java
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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)
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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
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< 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.caicongyang</ groupId > < artifactId >spingCloudConfServer</ artifactId > < version >0.0.1-SNAPSHOT</ version > < parent > < groupId >org.springframework.cloud</ groupId > < artifactId >spring-cloud-starter-parent</ artifactId > < version >Angel.SR6</ version > </ parent > < dependencies > < dependency > < groupId >org.springframework.cloud</ groupId > < artifactId >spring-cloud-config-server</ artifactId > </ dependency > <!-- sping cloud 注册服务 --> < dependency > < groupId >org.springframework.cloud</ groupId > < artifactId >spring-cloud-starter-eureka</ artifactId > </ dependency > < dependency > < groupId >org.springframework.boot</ groupId > < artifactId >spring-boot-starter-test</ artifactId > < scope >test</ scope > </ dependency > </ dependencies > < build > < plugins > < plugin > < groupId >org.springframework.boot</ groupId > < artifactId >spring-boot-maven-plugin</ artifactId > </ plugin > </ plugins > < defaultGoal >compile</ defaultGoal > </ build > </ project > |
application.java
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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
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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
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< 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.caicongyang</ groupId > < artifactId >springCloudApp</ artifactId > < version >0.0.1-SNAPSHOT</ version > < parent > < groupId >org.springframework.cloud</ groupId > < artifactId >spring-cloud-starter-parent</ artifactId > < version >Angel.SR6</ version > </ parent > < properties > < project.build.sourceEncoding >UTF-8</ project.build.sourceEncoding > < java.version >1.7</ java.version > < java.encoding >UTF-8</ java.encoding > < springfox.swagger.version >2.2.2</ springfox.swagger.version > </ properties > < dependencies > < dependency > < groupId >org.springframework.boot</ groupId > < artifactId >spring-boot-starter-web</ artifactId > </ dependency > <!-- sping cloud 监控 http://localhost:8080/health --> < dependency > < groupId >org.springframework.boot</ groupId > < artifactId >spring-boot-starter-actuator</ artifactId > </ dependency > < dependency > < groupId >org.springframework.cloud</ groupId > < artifactId >spring-cloud-starter-config</ artifactId > </ dependency > <!-- sping cloud 注册服务 --> < dependency > < groupId >org.springframework.cloud</ groupId > < artifactId >spring-cloud-starter-eureka</ artifactId > </ dependency > <!-- sping cloud 路由 --> < dependency > < groupId >org.springframework.cloud</ groupId > < artifactId >spring-cloud-starter-hystrix</ artifactId > </ dependency > < dependency > < groupId >org.springframework.boot</ groupId > < artifactId >spring-boot-starter-test</ artifactId > < scope >test</ scope > </ dependency > < dependency > < groupId >io.springfox</ groupId > < artifactId >springfox-swagger2</ artifactId > < version >${springfox.swagger.version}</ version > </ dependency > < dependency > < groupId >io.springfox</ groupId > < artifactId >springfox-swagger-ui</ artifactId > < version >${springfox.swagger.version}</ version > </ dependency > </ dependencies > < build > < finalName >spingcould</ finalName > < plugins > < plugin > < groupId >org.apache.maven.plugins</ groupId > < artifactId >maven-compiler-plugin</ artifactId > < configuration > < source >${java.version}</ source > < target >${java.version}</ target > < encoding >${java.encoding}</ encoding > < showWarnings >true</ showWarnings > </ configuration > </ plugin > </ plugins > </ build > </ project > |
Application.java
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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
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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 ( "${swagger.ui.enable}" ) //该配置项在配置中心管理 private boolean environmentSpecificBooleanFlag; @Bean public Docket docketFactory() { return new Docket(DocumentationType.SWAGGER_2).apiInfo( new ApiInfo( "接口文档" , "SpingCloud web接口列表" , "1.0" , "" , "" , "" , "" )).enable(environmentSpecificBooleanFlag); } } |
application.properties
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server.port=8080 spring.cloud.config.uri=http://127.0.0.1:8888 spring.cloud.config.name=springCloudApp spring.cloud.config.profile=${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.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服务器之家。
原文链接:http://www.jianshu.com/p/599c74a9035e