利用SpringCloud搭建一个最简单的微服务框架

Posted Archibald Witwicky

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http://blog.csdn.net/caicongyang/article/details/52974406

 

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；

技术分享图片

 

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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  1. <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">  
  2.   <modelVersion>4.0.0</modelVersion>  
  3.   <groupId>com.caicongyang</groupId>  
  4.   <artifactId>spingCloudEurekaServer</artifactId>  
  5.   <version>0.0.1-SNAPSHOT</version>  
  6.   <parent>  
  7.         <groupId>org.springframework.cloud</groupId>  
  8.         <artifactId>spring-cloud-starter-parent</artifactId>  
  9.         <version>Angel.SR6</version>  
  10.     </parent>  
  11.     <dependencies>          
  12.         <dependency>  
  13.             <groupId>org.springframework.cloud</groupId>  
  14.             <artifactId>spring-cloud-starter-eureka-server</artifactId>  
  15.         </dependency>  
  16.     </dependencies>  
  17.     <build>  
  18.         <plugins>  
  19.             <plugin>  
  20.                 <groupId>org.springframework.boot</groupId>  
  21.                 <artifactId>spring-boot-maven-plugin</artifactId>  
  22.             </plugin>  
  23.         </plugins>  
  24.     </build>  
  25. </project>  

Application.java

 

 

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  1. package com.caicongyang.eureka;  
  2.   
  3. import org.springframework.boot.SpringApplication;  
  4. import org.springframework.boot.autoconfigure.SpringBootApplication;  
  5. import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;  
  6.   
  7. /** 
  8.  * Spring could EurekaServer程序主入口 
  9.  *  
  10.  * @author Administrator 
  11.  * 
  12.  */  
  13. @SpringBootApplication  
  14. @EnableEurekaServer  
  15. public class Application {  
  16.     public static void main(String[] args) {  
  17.         SpringApplication.run(Application.class, args);  
  18.     }  
  19. }  

 

application.yml  （可用properties替代）

 

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  1. server:   
  2.       port: 9999  
  3. eureka:  
  4.        instance:   
  5.            hostname: 127.0.0.1  
  6.        client:   
  7.             registerWithEureka: false  
  8.             fetchRegistry: false  
  9.             serviceUrl:   
  10.                      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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  1. <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
  2.     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">  
  3.     <modelVersion>4.0.0</modelVersion>  
  4.     <groupId>com.caicongyang</groupId>  
  5.     <artifactId>spingCloudConfServer</artifactId>  
  6.     <version>0.0.1-SNAPSHOT</version>  
  7.   
  8.     <parent>  
  9.         <groupId>org.springframework.cloud</groupId>  
  10.         <artifactId>spring-cloud-starter-parent</artifactId>  
  11.         <version>Angel.SR6</version>  
  12.     </parent>  
  13.     <dependencies>  
  14.         <dependency>  
  15.             <groupId>org.springframework.cloud</groupId>  
  16.             <artifactId>spring-cloud-config-server</artifactId>  
  17.         </dependency>  
  18.         <!-- sping cloud 注册服务 -->  
  19.         <dependency>  
  20.             <groupId>org.springframework.cloud</groupId>  
  21.             <artifactId>spring-cloud-starter-eureka</artifactId>  
  22.         </dependency>  
  23.         <dependency>  
  24.             <groupId>org.springframework.boot</groupId>  
  25.             <artifactId>spring-boot-starter-test</artifactId>  
  26.             <scope>test</scope>  
  27.         </dependency>  
  28.     </dependencies>  
  29.   
  30.     <build>  
  31.         <plugins>  
  32.             <plugin>  
  33.                 <groupId>org.springframework.boot</groupId>  
  34.                 <artifactId>spring-boot-maven-plugin</artifactId>  
  35.             </plugin>  
  36.         </plugins>  
  37.         <defaultGoal>compile</defaultGoal>  
  38.     </build>  
  39. </project>  

application.java

 

 

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  1. package com.caiconyang.conf;  
  2.   
  3. import org.springframework.boot.SpringApplication;  
  4. import org.springframework.boot.autoconfigure.SpringBootApplication;  
  5. import org.springframework.cloud.config.server.EnableConfigServer;  
  6.   
  7. /** 
  8.  * Spring could conf程序主入口 
  9.  * @author Administrator 
  10.  * 
  11.  */  
  12. @SpringBootApplication  
  13. @EnableConfigServer  
  14. public class Application {  
  15.     public static void main(String[] args) {     
  16.         SpringApplication.run(Application.class,args);     
  17.     }     
  18. }  


application.properties

 

 

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  1. server.port=8888  
  2. ## App配置文件所在git地址  
  3. spring.cloud.config.server.git.uri=https://git.oschina.net/caicongyang/springCloudConfigRepo.git  
  4. spring.cloud.config.server.git.searchPaths=repo  
  5. spring.application.name=spingCloudConfServer  

 

4.App

pom.xml

 

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  1. <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">  
  2.   <modelVersion>4.0.0</modelVersion>  
  3.   <groupId>com.caicongyang</groupId>  
  4.   <artifactId>springCloudApp</artifactId>  
  5.   <version>0.0.1-SNAPSHOT</version>  
  6.     
  7.     <parent>  
  8.         <groupId>org.springframework.cloud</groupId>  
  9.         <artifactId>spring-cloud-starter-parent</artifactId>  
  10.         <version>Angel.SR6</version>  
  11.     </parent>  
  12.   <properties>  
  13.         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>  
  14.         <java.version>1.7</java.version>  
  15.         <java.encoding>UTF-8</java.encoding>  
  16.         <springfox.swagger.version>2.2.2</springfox.swagger.version>  
  17.     </properties>  
  18.   <dependencies>  
  19.         <dependency>  
  20.             <groupId>org.springframework.boot</groupId>  
  21.             <artifactId>spring-boot-starter-web</artifactId>  
  22.         </dependency>  
  23.         <!-- sping cloud 监控  http://localhost:8080/health -->  
  24.         <dependency>  
  25.             <groupId>org.springframework.boot</groupId>  
  26.             <artifactId>spring-boot-starter-actuator</artifactId>  
  27.         </dependency>  
  28.         <dependency>  
  29.             <groupId>org.springframework.cloud</groupId>  
  30.             <artifactId>spring-cloud-starter-config</artifactId>  
  31.         </dependency>  
  32.         <!-- sping cloud 注册服务 -->  
  33.         <dependency>  
  34.             <groupId>org.springframework.cloud</groupId>  
  35.             <artifactId>spring-cloud-starter-eureka</artifactId>  
  36.         </dependency>  
  37.             <!-- sping cloud 路由 -->  
  38.         <dependency>  
  39.             <groupId>org.springframework.cloud</groupId>  
  40.             <artifactId>spring-cloud-starter-hystrix</artifactId>  
  41.         </dependency>  
  42.   
  43.         <dependency>  
  44.             <groupId>org.springframework.boot</groupId>  
  45.             <artifactId>spring-boot-starter-test</artifactId>  
  46.             <scope>test</scope>  
  47.         </dependency>  
  48.         <dependency>  
  49.             <groupId>io.springfox</groupId>  
  50.             <artifactId>springfox-swagger2</artifactId>  
  51.             <version>${springfox.swagger.version}</version>  
  52.         </dependency>  
  53.         <dependency>  
  54.             <groupId>io.springfox</groupId>  
  55.             <artifactId>springfox-swagger-ui</artifactId>  
  56.             <version>${springfox.swagger.version}</version>  
  57.         </dependency>  
  58.     </dependencies>  
  59.       
  60.     
  61.   <build>  
  62.         <finalName>spingcould</finalName>  
  63.         <plugins>  
  64.             <plugin>  
  65.                 <groupId>org.apache.maven.plugins</groupId>  
  66.                 <artifactId>maven-compiler-plugin</artifactId>  
  67.                 <configuration>  
  68.                     <source>${java.version}</source>  
  69.                     <target>${java.version}</target>  
  70.                     <encoding>${java.encoding}</encoding>  
  71.                     <showWarnings>true</showWarnings>  
  72.                 </configuration>  
  73.             </plugin>  
  74.         </plugins>  
  75.     </build>  
  76.     
  77.     
  78. </project>  


Application.java

 

 

[java] view plain copy
 
  1. package com.caicongyang.springCloudApp.main;  
  2.   
  3. import org.springframework.boot.SpringApplication;  
  4. import org.springframework.boot.autoconfigure.EnableAutoConfiguration;  
  5. import org.springframework.cloud.client.discovery.EnableDiscoveryClient;  
  6. import org.springframework.context.annotation.ComponentScan;  
  7. import org.springframework.context.annotation.Configuration;  
  8.   
  9. /** 
  10.  * Spring could web程序主入口 
  11.  * @author Administrator 
  12.  * 
  13.  */  
  14. @Configuration//配置控制    
  15. @EnableAutoConfiguration//启用自动配置    
  16. @ComponentScan(value={"com.caicongyang.springCloudApp"})//组件扫描    
  17. @EnableDiscoveryClient  
  18. public class Application {  
  19.     public static void main(String[] args) {     
  20.         //第一个简单的应用，     
  21.         SpringApplication.run(Application.class,args);     
  22.     }     
  23. }  

SwaggerConfig.java

 

 

[java] view plain copy
 
  1. package com.caicongyang.springCloudApp.conf;  
  2.   
  3. import org.springframework.beans.factory.annotation.Value;  
  4. import org.springframework.context.annotation.Bean;  
  5. import org.springframework.context.annotation.Configuration;  
  6.   
  7. import springfox.documentation.service.ApiInfo;  
  8. import springfox.documentation.spi.DocumentationType;  
  9. import springfox.documentation.spring.web.plugins.Docket;  
  10. import springfox.documentation.swagger2.annotations.EnableSwagger2;  
  11.   
  12. /** 
  13.  * 
  14.  * @author caicongyang1 
  15.  * @version id: SwaggerConfig, v 0.1 16/4/22 下午4:12 caicongyang1 Exp $$ 
  16.  */  
  17. @Configuration  
  18. @EnableSwagger2  
  19. public class SwaggerConfig {  
  20.   
  21.     @Value("${swagger.ui.enable}") //该配置项在配置中心管理  
  22.     private boolean environmentSpecificBooleanFlag;  
  23.       
  24.     @Bean  
  25.     public Docket docketFactory() {  
  26.         return new Docket(DocumentationType.SWAGGER_2).apiInfo(  
  27.            new ApiInfo("接口文档", "SpingCloud web接口列表", "1.0", "", "", "", "")).enable(environmentSpecificBooleanFlag);  
  28.     }  
  29. }  

application.properties

 

 

[plain] view plain copy
 
  1. server.port=8080  
  2. spring.cloud.config.uri=http://127.0.0.1:8888  
  3. spring.cloud.config.name=springCloudApp  
  4. spring.cloud.config.profile=${config.profile:dev}  
  5. #service discovery url  
  6. eureka.client.serviceUrl.defaultZone=http://localhost:9999/eureka/  
  7. #service name  
  8. 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：

 

https://git.oschina.net/caicongyang/springcloud.git






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