Spring Boot自定义HTTP异常

Question

我有这个方法来处理所有缺少请求头的异常，但在一个控制器中，希望接收一个json作为主体。如果它是无效的json或为null，则会使用自定义消息删除异常：

@ExceptionHandler(value = {ServletRequestBindingException.class, HttpMessageNotReadableException.class})
public final ResponseEntity<ErrorResponse> handleHeaderException(Exception ex) {
    List<String> details = new ArrayList<>();
    details.add(ex.getMessage());
    return new ResponseEntity<>(new ErrorResponse("Bad Request", details), HttpStatus.BAD_REQUEST);
}

{“消息”：“错误请求”,“详细信息”：[“必需的请求正文丢失：public org.springframework.http.responseentity packages.fazerlogin（packages.bodylogin）throws java.io.ioException”]}

@PostMapping(value = "v1/token", consumes = "application/json;charset=UTF-8")
public ResponseEntity<TokenOutputDto> doLogin(@RequestBody @Valid BodyLogin body) throws IOException {
    return authenticationModel.auth(body.getEmail(), body.getPassword());
}

Answer 1

您可以通过以下方式在方法中处理这些异常处理程序：

@ExceptionHandler(value = {ServletRequestBindingException.class, HttpMessageNotReadableException.class})
public final ResponseEntity<ErrorResponse> handleHeaderException(Exception ex) {
    List<String> details = new ArrayList<>();
    if (ex instanceof IOException ) {
        if (ex.getCause() instanceof JsonParseException) {
            details.add("JSON parse error");
        } else {
            details.add("Required request body");
        }
    } else {
        details.add(ex.getMessage());
    }
    return new ResponseEntity<>(new ErrorResponse("Bad Request", details), HttpStatus.BAD_REQUEST);
}