新建一個客戶端呼叫已經註冊的遠端伺服器方法：

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<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">
    <modelVersion
 
>4.0.0</modelVersion>

    <groupId>demo</groupId>
    <artifactId>cloud-simple-ui</artifactId>
    <version>1.0-SNAPSHOT</version>

    <packaging>jar</packaging>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId
 
>spring-boot-starter-parent</artifactId>
        <version>1.3.5.RELEASE</version>
    </parent>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId
 
>spring-cloud-dependencies</artifactId>
                <version>Brixton.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>1.7</java.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-config</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <!-- 使用eureka -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-feign</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>
        <!-- 使用hystrix -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-hystrix</artifactId>
        </dependency>
        <dependency>
            <groupId>org.jolokia</groupId>
            <artifactId>jolokia-core</artifactId>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
        <defaultGoal>compile</defaultGoal>
    </build>


</project>

user實體類

public class User {

    private String username;
    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }
}

userService 服務類

@Service
public class UserService {
     @Autowired  
     RestTemplate restTemplate;

     final String SERVICE_NAME="遠端呼叫的服務名稱";

     @HystrixCommand(fallbackMethod = "fallbackSearchAll")
     //這裡使用了斷路器，就是@HystrixCommand註解。斷路器的基本作用就是@HystrixCommand註解的方法失敗後，系統將自動切換到fallbackMethod方法執行。斷路器Hystrix具備回退機制、請求快取和請求打包以及監控和配置等功能
     public List<User> readUserInfo() {
         return restTemplate.getForObject("http://"+SERVICE_NAME+"/user", List.class);
    }    
     private List<User> fallbackSearchAll() {
         //這裡是被@HystrixCommand方法註解過的方法失敗後執行的方法
     }
}

UserController 控制器

@RestController
public class UserController {

    @Autowired
    UserService userService;
    @RequestMapping(value="/users")
    public ResponseEntity<List<User>> readUserInfo(){
        List<User> users=userService.readUserInfo();        
        return new ResponseEntity<List<User>>(users,HttpStatus.OK);
    }
}

bootstrap.properties 配置檔案

spring.cloud.config.uri=http://127.0.0.1:${config.port:8888}
spring.cloud.config.name=cloud-config
spring.cloud.config.profile=${config.profile:dev}
eureka.client.serviceUrl.defaultZone=http\://localhost\:8761/eureka/
#service name
spring.application.name=當前專案註冊eureka的名字
#ribbon config
cloud-simple-service.ribbon.ConnectTimeout=5000
cloud-simple-service.ribbon.ReadTimeout=10000
server.port=8080

啟動類

public class WebApplication {

    public static void main(String[] args) throws Exception {
        SpringApplication.run(WebApplication.class, args);
    }
}

啟動程式後就可以在eureka中發現服務，訪問URL即可遠端呼叫方法。