利用SpringCloud搭建一个最简单的微服务框架

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；

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

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. <parent>
8. <groupId>org.springframework.cloud</groupId>
9. <artifactId>spring-cloud-starter-parent</artifactId>
10. <version>Angel.SR6</version>
11. </parent>
12. <dependencies>
13. <dependency>
14. <groupId>org.springframework.cloud</groupId>
15. <artifactId>spring-cloud-config-server</artifactId>
16. </dependency>
17. <!-- sping cloud 注册服务 -->
18. <dependency>
19. <groupId>org.springframework.cloud</groupId>
20. <artifactId>spring-cloud-starter-eureka</artifactId>
21. </dependency>
22. <dependency>
23. <groupId>org.springframework.boot</groupId>
24. <artifactId>spring-boot-starter-test</artifactId>
25. <scope>test</scope>
26. </dependency>
27. </dependencies>
28. <build>
29. <plugins>
30. <plugin>
31. <groupId>org.springframework.boot</groupId>
32. <artifactId>spring-boot-maven-plugin</artifactId>
33. </plugin>
34. </plugins>
35. <defaultGoal>compile</defaultGoal>
36. </build>
37. </project>

application.java

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

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

Application.java

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

SwaggerConfig.java

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

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