SpringCloud Eureka Provider及Consumer的实现

<properties>
    <java.version>1.8</java.version>
    <spring-cloud.version>Greenwich.SR3</spring-cloud.version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
    </dependency>

    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
    </dependency>
  </dependencies>

  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-dependencies</artifactId>
        <version>${spring-cloud.version}</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    </dependencies>
  </dependencyManagement>

  <build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
    </plugins>
  </build>

@SpringBootApplication
@EnableDiscoveryClient // 这个注解加不加都可以，因为Eureka
public class EurekaProviderApplication {
  public static void main(String[] args) {
    SpringApplication.run(EurekaProviderApplication.class, args);
  }
}

@RestController
public class EurekaProviderController {
  @GetMapping("/provider")
  public String provider(@RequestParam String aaa){
    return "eureka-provider-return" + aaa;
  }
}

@SpringBootApplication  // 另一个发现服务的注解可以不用谢（SpringCloud版本要在Edgware之后）
public class EurekaConsumerApplication {
  @Bean
  @LoadBalanced
  RestTemplate restTemplate(){
    return new RestTemplate();
  }
  public static void main(String[] args) {
    SpringApplication.run(EurekaConsumerApplication.class, args);
  }
}

@RestController
public class EurekaConsumerController {
  @Autowired
  private RestTemplate restTemplate;
  @GetMapping("/consumer")
  @GetMapping("/consumer")
  public String consumer(@RequestParam String aaa){
    return restTemplate.getForObject("http://EUREKA-PROVIDER/provider?aaa=" + aaa,String.class );
  }
}

@Configuration
@EnableConfigurationProperties
@ConditionalOnClass(EurekaClientConfig.class)
@Import(DiscoveryClientOptionalArgsConfiguration.class)
@ConditionalOnBean(EurekaDiscoveryClientConfiguration.Marker.class)
@ConditionalOnProperty(value = "eureka.client.enabled", matchIfMissing = true)
@ConditionalOnDiscoveryEnabled
@AutoConfigureBefore({ NoopDiscoveryClientAutoConfiguration.class,
   CommonsClientAutoConfiguration.class, ServiceRegistryAutoConfiguration.class })
@AutoConfigureAfter(name = {
   "org.springframework.cloud.autoconfigure.RefreshAutoConfiguration",
   "org.springframework.cloud.netflix.eureka.EurekaDiscoveryClientConfiguration",
   "org.springframework.cloud.client.serviceregistry.AutoServiceRegistrationAutoConfiguration" })
public class EurekaClientAutoConfiguration {
}