Spring Cloud是一個基于Spring Boot實現的云應用開發工具，它為基于JVM的云應用開發中的配置管理、服務發現、斷路器、智能路由、微代理、控制總線、全局鎖、決策競選、分布式會話和集群狀態管理等操作提供了一種簡單的開發方式。
Spring Cloud包含了多個子項目（針對分布式系統中涉及的多個不同開源產品），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等項目。
1.微服務
微服務主要包含服務注冊，服務發現，服務路由，服務配置，服務熔斷，服務降級等一系列的服務，而Spring Cloud為我們提供了個一整套的服務；
本例子為你提供了最簡單的一個服務發現例子，包含服務注冊發現spingCloudEurekaServer、服務配置中心spingCloudConfServer、以及一個app應用springCloudApp
2.服務注冊與發現
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@EnableEurekaServerpublic 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.服務配置（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 注冊服務 --> <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@EnableConfigServerpublic 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 監控 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 注冊服務 --> <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//啟用自動配置 @ComponentScan(value={"com.caicongyang.springCloudApp"})//組件掃描 @EnableDiscoveryClientpublic class Application { public static void main(String[] args) { //第一個簡單的應用， 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@EnableSwagger2public class SwaggerConfig { @Value("${swagger.ui.enable}") //該配置項在配置中心管理 private boolean environmentSpecificBooleanFlag; @Bean public Docket docketFactory() { return new Docket(DocumentationType.SWAGGER_2).apiInfo( new ApiInfo("接口文檔", "SpingCloud web接口列表", "1.0", "", "", "", "")).enable(environmentSpecificBooleanFlag); } } |
application.properties
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server.port=8080 spring.cloud.config.uri=http://127.0.0.1:8888 spring.cloud.config.name=springCloudApp spring.cloud.config.profile=${config.profile:dev} #service discovery url eureka.client.serviceUrl.defaultZone=http://localhost:9999/eureka/ #service name spring.application.name=springCloudApp |
5.測試與驗證
順序啟動服務注冊發現spingCloudEurekaServer、服務配置中心spingCloudConfServer、以及一個app應用springCloudApp
測試與驗證
1.訪問http://localhost:9999/eureka/ app是否已經注冊上來
2.訪問 http://localhost:8080/swagger-ui.html 是否正常訪問，如果正常訪問說明爭取讀取到config配置中心的swagger.ui.enable配置項
6.源碼：以上所有源碼：springcloud.rar
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持服務器之家。
原文鏈接：http://www.jianshu.com/p/599c74a9035e
