1 在userService專案 新增service serviceImpl 模擬查詢資料庫

@Service
public class UserServiceImpl  implements UserService {
    public   static  final Map<String,User> resMap = new HashMap<String,User>();
    static {
        User u1= new User("1","張三","zhangsan","1234");
        User u2= new User("2","張三1","zhangsan1","1234");
        User u3= new User("3","張三2","zhangsan2","1234");
        User u4= new User("4","張三3","zhangsan3","1234");
        User u5= new User("5","張三4","zhangsan4","1234");
        resMap.put("1",u1);
        resMap.put("2",u2);
        resMap.put("3",u3);
        resMap.put("4",u4);
        resMap.put("5",u5);
    }


    @Override
    public List<User> getList() {
        Collection<User> collection= resMap.values();
        List<User> userList =  new ArrayList<User>(collection);
        return userList;
    }

    @Override
    public User findUser(String id) {

        return resMap.get(id);

    }
}
 

2新建controller

@RestController
@RequestMapping(value="/api/user/")
public class UserController {
    @Autowired
    private UserService userService;

    @RequestMapping(value="list")
    public Object List(){
      
        return   userService.getList();
    }
    @RequestMapping( value="find")
    public Object findById(@RequestParam("id") String  id){
            
        return  userService.findUser(id);
    }

}
 

3 啟動user_service服務測試一下

4  模擬登入login_srvice 呼叫user_service使用者查詢  Feign 

新建login_service專案 

增加依賴

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

5 增加feignClient

FeignClient("USER-SERVICE") // 服務名稱USER-SERVICE
public interface UserFeignClient {
@RequestMapping(method = RequestMethod.GET, value ="/api/user/list")
    List<Object> getUserList();
@RequestMapping(method = RequestMethod.GET,value ="/api/user/find")
Object getById(@RequestParam("id") String  id);


}

6 新增controller

@RestController
public class LoginController {
    @Autowired
    private UserFeignClient userFeignClient;
@RequestMapping("/list")
    public Object getList(){
        return  userFeignClient.getUserList();
    }
}

7 修改yml檔案

server:
  port: 8991

spring:
  application:
    name: login-service

eureka:
 hostname:
  client:
   serviceUrl:
     defaultZone: http://localhost:8761/eureka/



feign:
  client:
    config:
      default:
        connectTimeout: 5000
        readTimeout: 5000
        loggerLevel: basic

8 檢視註冊中心

8 呼叫login_service的list介面