一、创建服务提供者service-hi

1、创建子项目方法类似eureka，略

2、修改pom文件，主要是添加jar包

4.0.0

com.landcode

land

1.0.0-SNAPSHOT

land-service-hi

com.landcode

land-common

1.0.0-SNAPSHOT

org.springframework.cloud

spring-cloud-starter-netflix-eureka-server

land-service-hi // jar包名

org.springframework.boot

spring-boot-maven-plugin

repackage

org.apache.maven.plugins

maven-compiler-plugin

utf-8

1.8

1.8

3、resource目录下添加配置文件application.yml

server:

port: 8855

spring:

application:

name: service-hi

eureka:

instance:

prefer-ip-address: true #开启显示IP地址

instance-id: ${spring.cloud.client.ip-address}:${server.port} #eureka页面显示IP地址：端口号

client:

serviceUrl:

defaultZone: http://localhost:8761/eureka/

4、新建启动类，注意加上@EnableEurekaClient 注解，到eureka 注册服务

@SpringBootApplication

@EnableEurekaClientpublic classHiApplication {public static voidmain(String[] args) {

SpringApplication.run(HiApplication.class, args);

}

}

5、新建一个测试controller，方便服务调用方测试。测试功能中会返回服务方的端口号，方便做负载均衡测试

@RestControllerpublic classHiController {

@Value("${server.port}")privateString port;

@RequestMapping(value= "/hi")publicString hi() {return "hi " + port; //返回端口号，方便负载均衡功能测试

}

}

6、新建子项目service-consumer 作为服务调用方，方法类似eureka(略)，修改pom文件，添加eureka、openfeign的jar包

4.0.0

com.landcode

land

1.0.0-SNAPSHOT

land-service-consumer

com.landcode

land-common

1.0.0-SNAPSHOT

org.springframework.cloud

spring-cloud-starter-netflix-eureka-server

org.springframework.cloud

spring-cloud-starter-openfeign

land-service-consumer

org.springframework.boot

spring-boot-maven-plugin

repackage

org.apache.maven.plugins

maven-compiler-plugin

utf-8

1.8

1.8

7、resource目录添加项目配置文件application.yml

server:

port: 8866

spring:

application:

name: service-consumer

eureka:

instance:

prefer-ip-address: true #开启显示IP地址

instance-id: ${spring.cloud.client.ip-address}:${server.port} #eureka页面显示IP地址：端口号

client:

serviceUrl:

defaultZone: http://localhost:8761/eureka/

8、添加项目启动类，@EnableFeignClients 表示使用feign调用服务接口，Ribbonclient 注解表示采用ribbon做负载均衡，configuration = RibbonConfig.class， RibbonConfig 是Ribbon 负载均衡机制配置类

@SpringBootApplication

@EnableEurekaClient

@EnableFeignClients(basePackages= { "com.landcode.service.consumer.service"})

@RibbonClient(name= "service-hi", configuration = RibbonConfig.class)public classConsumerApplication {public static voidmain(String[] args) {//TODO Auto-generated method stub

SpringApplication.run(ConsumerApplication.class, args);

}

@Bean

@LoadBalancedpublicRestTemplate restTemplate() {return newRestTemplate();

}

}

9、RibbonConfig配置类，指定使用某种负载均衡策略

@Configurationpublic classRibbonConfig {

@Resource

IClientConfig clientConfig;

@BeanpublicIRule ribbonRule(IClientConfig clientConfig) {//return new RandomRule();//随机选择策略

return newWeightedResponseTimeRule();

}

}

10、新建service，调用服务service-hi，会自动采用ribbon的负载均衡策略

@FeignClient(value = "service-hi")public interfaceITestHi {

@RequestMapping("/hi")publicString testHi();

}

11、新建测试 controller，测试服务调用和负载均衡。这里注意：如果ITestHi还有实现类bean的话，注入时注意通过name区分

@RestControllerpublic classTestHiController {

@AutowiredprivateITestHi testHi;

@RequestMapping("/consumer/hi")publicString testHi() {returntestHi.testHi();

}

}

12、启动eureka，启动几个service-hi服务(只需修改为不同端口号)，启动service-consumer服务，打开浏览器输入http://192.168.0.3:8866/consumer/hi 调用服务消费测试接口，可以看见每次调用打印了服务提供方不同的端口号。