Springboot 之RestTemplate实现Http请求。

使用RestTemplate 实现Http请求：
服务提供者：
applicatgion.yml

-------------------------
server:
  port: 8080
spring:
  application:
    name: comsumer-order

UserController 控制层：

@RestController
public class UserController
{
    
    

    @Autowired
    private UserService userService;

    @PostMapping("get/user/{id}")
    public UserDTO getUser(@PathVariable String id,@RequestBody UserDTO userDTO )
    {
    
    
        return userService.getUser(id,userDTO);
    }
}
----------------------------------------
@Service
public class UserServiceImpl implements UserService
{
    
    

    @Override
    public UserDTO getUser(String id, UserDTO userDTO)
    {
    
    
        userDTO.setName(String.format("getUserDTO %s-%s",userDTO.getName(),id));
        userDTO.setCurrentTime(new Date());
        return userDTO;
    }
}
----------------------------------------
@Data
public class UserDTO implements Serializable
{
    
    
    private static final long serialVersionUID = -2391272212394096956L;
    private long id;
    private String name;
    private String password;
    @JSONField(format = "yyyy-MM-dd HH:mm:ss,SSS")
    private Date currentTime;
}

---

服务消费者：
application.yml

server:
  port: 8081
spring:
  application:
    name: consumer-1
privide:
  consumer: http://127.0.0.1:8080/get/user/

UserController 控制层：

@RestController
public class UserController
{
    
    

    @Autowired
    private UserService userService;

    @Autowired
    private RestTemplate restTemplate;
    @Value("${privide.consumer}")
    private String baseURL;

    @GetMapping("consumer")
    public ResponseEntity<UserDTO> getUserDTO(long id)
    {
    
    
        UserDTO user = userService.getUser(id);
        String url = baseURL+id;
        ResponseEntity<UserDTO> userDTOResponseEntity = restTemplate.postForEntity(url, user, UserDTO.class);
        return userDTOResponseEntity;
    }
}

UserService 层：

@Service
public class UserServiceImpl implements UserService
{
    
    

    @Value("${spring.application.name}")
    private String appName;

    @Override
    public UserDTO getUser(long id)
    {
    
    
       UserDTO userDTO =  new UserDTO();
       userDTO.setName(appName);
       userDTO.setId(id);
       userDTO.setPassword(appName);
        return userDTO;
    }
}

启动类：

@SpringBootApplication
public class App 
{
    
    
    public static void main( String[] args )
    {
    
    
        SpringApplication.run(App.class);
    }
    @Bean
    public RestTemplate getRestemplate()
    {
    
    
        return new RestTemplate();
    }
}

RestTemplate 中封装了实用的httpclient 工具类方便使用。