@ResponseStatus，客戶端沒有收到錯誤消息

Question

我有代碼自定義異常：

@ResponseStatus(value = BAD_REQUEST, reason = "Login is busy") 
    public class LoginIsBusyException extends RuntimeException{ 
} 

而一個方法，可以把它：

@RequestMapping(method = POST) 
public void registration(@RequestBody UserRest user) throws 
LoginIsBusyException{ 
    userService.checkAlreadyExist(user.getLogin(), user.getMail()); 
    user.setActive(false); 
    UserRest userRest = userService.addUser(user); 
    Integer randomToken = randomTokenService.getRandomToken(userRest.getMail()); 
    mailService.sendMail(randomToken, userRest.getLogin(), userRest.getMail()); 
} 

的問題是，客戶端只接收錯誤代碼但未收到狀態文本「登錄很忙」，已嘗試添加捕獲此異常的方法

@ExceptionHandler(LoginIsBusyException.class) 
public void handleException(HttpServletResponse response) throws IOException 
{ 
    response.sendError(HttpServletResponse.SC_BAD_REQUEST, "Login is busy"); 
} 

但是，該消息某處丟失，客戶得到這樣的迴應：

Answer 1

你已經錯過了@ResponseBody您handleException方法並且還回報void與當前的代碼，即，你是不是經過response體，如下圖所示：

@ResponseBody 
@ExceptionHandler(LoginIsBusyException.class) 
public String handleException(HttpServletResponse response) throws IOException 
{ 
    response.sendError(HttpServletResponse.SC_BAD_REQUEST, "Login is busy"); 
} 

要不你用ResponseEntity同時生產標題和正文如下圖所示

@ExceptionHandler(LoginIsBusyException.class) 
public ResponseEntity<String> 
       handleException(LoginIsBusyException exe) { 
    return ResponseEntity.status(HttpStatus.BAD_REQUEST).body("Login is busy"); 
}