spring - 引发javax.validation.ConstraintViolationException时获取字段名称

当PathVariable的“名称”未通过验证时，将引发javax.validation.ConstraintViolationException。有没有办法在抛出的javax.validation.ConstraintViolationException中检索参数名称？

@RestController
@Validated
public class HelloController {

@RequestMapping("/hi/{name}")
public String sayHi(@Size(max = 10, min = 3, message = "name should    have between 3 and 10 characters") @PathVariable("name") String name) {
  return "Hi " + name;
}

最佳答案

以下异常处理程序展示了它是如何工作的:

@ExceptionHandler(ConstraintViolationException.class)

ResponseEntity<Set<String>> handleConstraintViolation(ConstraintViolationException e) {
    Set<ConstraintViolation<?>> constraintViolations = e.getConstraintViolations();

Set<String> messages = new HashSet<>(constraintViolations.size());
messages.addAll(constraintViolations.stream()
        .map(constraintViolation -> String.format("%s value '%s' %s", constraintViolation.getPropertyPath(),
                constraintViolation.getInvalidValue(), constraintViolation.getMessage()))
        .collect(Collectors.toList()));

return new ResponseEntity<>(messages, HttpStatus.BAD_REQUEST);

}

您可以使用以下命令访问无效值(名称)

 constraintViolation.getInvalidValue()

您可以通过以下方式访问属性名称“名称”

constraintViolation.getPropertyPath()