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 >
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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);
}
}
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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/
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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 >
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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);
}
}
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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
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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 >
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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);
}
}
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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 ( "${swagger.ui.enable}" ) //该配置项在配置中心管理
private boolean environmentSpecificBooleanFlag;
@Bean
public Docket docketFactory() {
return new Docket(DocumentationType.SWAGGER_2).apiInfo(
new ApiInfo( "接口文档" , "SpingCloud web接口列表" , "1.0" , "" , "" , "" , "" )).enable(environmentSpecificBooleanFlag);
}
}
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application.properties
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server.port=8080
spring.cloud.config.uri=http://127.0.0.1:8888
spring.cloud.config.name=springCloudApp
spring.cloud.config.profile=${config.profile:dev}
#service discovery url
eureka.client.serviceUrl.defaultZone=http://localhost:9999/eureka/
#service name
spring.application.name=springCloudApp
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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