一尘不染

当我尝试在Spring Boot应用程序中将自定义错误传递给客户端时发生异常

spring-boot

java.lang.IllegalStateException:提交响应后无法调用sendError()

如上所述,我在行响应.sendError()方法中遇到错误。我已经在互联网上搜索了4天。但是我无法弄清楚问题所在。这个问题可能是什么原因?

我有一个自定义的异常类。在以下代码中,catch块成功捕获了我的自定义异常。但是,当我尝试将其发送到客户端时,它将返回上述异常。

我已经尝试过解决方案1 ​​–控制器级别@ExceptionHandler解决方案2 – HandlerExceptionResolver解决方案3 –
@ControllerAdvice解决方案4 – ResponseStatusException

解决上述问题的方法。但是对我不起作用:(

我已将错误代码和错误消息添加到响应正文。然后,我可以成功获取错误。但这不是我想要的方式。

@RequestMapping(value="/getMemberID/", method=RequestMethod.POST ,headers ="Accept=application/json")
public  ResponseMemberID getMemberID(@RequestBody RequestMemberID request,HttpServletResponse response, @Context HttpServletRequest _request ) throws Exception {

    Member_info memberinfo = new Member_info();
    ResponseMemberID _response =new ResponseMemberID();

    try {
          memberinfo = memberinfoservice.getMemberID(request.getPin(),request.getMsisdn());
          _response.setMember_id(memberinfo.getMember_id());

    }catch(MemberNotFoundException exp) {

                 response.sendError(exp.getErrorCode(), exp.getErrorMessage());
    }

    return _response;
}

我需要使用上述sendError()方法获取错误代码和错误消息作为JSON响应。异常成功进入catch块。


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2020-05-30

共1个答案

一尘不染

@RestController
@CrossOrigin(origins = "*")
public class MemberController {

@Autowired
MemberInfoService memberinfoservice;


@RequestMapping(value="/getMemberID/", method=RequestMethod.POST ,headers = "Accept=application/json")
public ResponseMemberID getMemberID(@RequestBody RequestMemberID request) throws  Exception{

    Member_info memberinfo = new Member_info();
    ResponseMemberID _response =new ResponseMemberID();

       memberinfo = memberinfoservice.getMemberID(request.getPin(),request.getMsisdn());

       if(memberinfo == null) {

           throw new PINNotValidException();

       }
       _response.setMember_id(memberinfo.getMember_id());

    return _response;

}

@ExceptionHandler(PINNotValidException.class)
public ResponseEntity<ErrorResponse> exceptionHandler(Exception ex) {
    ErrorResponse error = new ErrorResponse();
    error.setErrorCode(PSAExceptionCodes.PIN_VALIDATION_FAIL);
    error.setMessage(ex.getMessage());
    return new ResponseEntity<ErrorResponse>(error, HttpStatus.OK);
}

上面提到的是我根据链接http://www.jcombat.com/spring/exception-handling-in-spring-
restful-web-service更改的代码,它满足了我的问题。

此外,我还尝试在我创建的应用程序中使用 HttpServletResponse 类的 sendError() 方法,但该方法始终返回空响应。

但是通过在创建单独的 PINNotValidException.classErrorResponse.class
PSAException.classPSAExceptionCodes.class
时使用@ExceptionHandler作为自定义异常,我可以轻松解决我的问题。下面分别提到了这些类。

PINNotValidException.class

public class PINNotValidException extends PSAException{

private static final long serialVersionUID = 1L;
private static String errorMessage = "Pin Number and Mobile Number mismatch.";
private static int errorCode = PSAExceptionCodes.PIN_VALIDATION_FAIL;

public PINNotValidException() {
    super(errorMessage, errorCode);
 }
}

ErrorResponse.class

public class ErrorResponse {

    private int errorCode;
    private String message;

    public int getErrorCode() {
        return errorCode;
    }
    public void setErrorCode(int errorCode) {
        this.errorCode = errorCode;
    }
    public String getMessage() {
        return message;
    }
    public void setMessage(String message) {
        this.message = message;
    }
}

PSAException.class

public class PSAException extends Exception {
private static final long serialVersionUID= 100L;

private String errorMessage;
private int errorCode;

public String getErrorMessage() {
    return errorMessage;
}
public int getErrorCode(){
    return errorCode;
}
public PSAException(String errorMessage) {
    super(errorMessage);
    this.errorMessage = errorMessage;
}
public PSAException(String errorMessage, int errorCode) {
    super(errorMessage);
    this.errorMessage = errorMessage;
    this.errorCode=errorCode;
}
public PSAException() {
    super();
}
}

PSAExceptionCodes.class

public class PSAExceptionCodes {

public static final int PIN_VALIDATION_FAIL = 251;      //Pin and mobile mismatch 
public static final int ACCOUNT_TYPE_NOT_FOUND = 300;     //Account type mismatch
public static final int NO_MEMBER_FOUND = 250;            //Member Not Found
public static final int MEMBER_NOT_REGISTERED = 256;      //Member not registered

}
2020-05-30