春季：如何在运行时选择响应类型？

另一种可能性是在上述两种解决方案之间采用混合方法：

@ControllerAdvicepublic class MyExceptionHandler extends ResponseEntityExceptionHandler {@ExceptionHandler({ MyDataException.class })protected ResponseEntity<Object> handleInvalidRequest(RuntimeException e, WebRequest request) {    MyDataExceptionire = (MyDataException) e;    List<FieldErrorResource> fieldErrorResources = new ArrayList<>();    List<FieldError> fieldErrors = ire.getErrors().getFieldErrors();    for (FieldError fieldError : fieldErrors) {        FieldErrorResource fieldErrorResource = new FieldErrorResource();        fieldErrorResource.setResource(fieldError.getObjectName());        fieldErrorResource.setField(fieldError.getField());        fieldErrorResource.setCode(fieldError.getCode());        fieldErrorResource.setMessage(fieldError.getDefaultMessage());        fieldErrorResources.add(fieldErrorResource);    }    ErrorResource error = new ErrorResource("MyDataException", ire.getMessage());    error.setFieldErrors(fieldErrorResources);    HttpHeaders headers = new HttpHeaders();    headers.setContentType(MediaType.APPLICATION_JSON);    return handleExceptionInternal(e, error, headers, HttpStatus.UNPROCESSABLE_ENTITY, request);}}

在此博客上提出的解决方案

编辑 ：

我还从博客中添加了FieldError和ErrorResource类，因为将来可能会删除它：

错误资源：

@JsonIgnoreProperties(ignoreUnknown = true)public class ErrorResource {private String pre;private String message;private List<FieldErrorResource> fieldErrors;public ErrorResource() { }public ErrorResource(String pre, String message) {    this.pre = pre;    this.message = message;}public String getCode() { return pre; }public void setCode(String pre) { this.pre = pre; }public String getMessage() { return message; }public void setMessage(String message) { this.message = message; }public List<FieldErrorResource> getFieldErrors() { return fieldErrors; }public void setFieldErrors(List<FieldErrorResource> fieldErrors) {    this.fieldErrors = fieldErrors;}}

FieldErrorResource：

@JsonIgnoreProperties(ignoreUnknown = true)public class FieldErrorResource {private String resource;private String field;private String pre;private String message;public String getResource() { return resource; }public void setResource(String resource) { this.resource = resource; }public String getField() { return field; }public void setField(String field) { this.field = field; }public String getCode() { return pre; }public void setCode(String pre) { this.pre = pre; }public String getMessage() { return message; }public void setMessage(String message) { this.message = message; }}