利用SpringCloud搭建一个最简单的微服务框架

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

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

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）

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

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

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

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

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

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

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

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