如何在处理绑定结果注释后使用Exceptionhandler注释

@RestController
public class UserController {

    @PostMapping("/users")
    public ResponseEntity<String> createUser(@Valid @RequestBody User user) {
        // 处理用户创建逻辑
        return ResponseEntity.ok("User created successfully");
    }

    @ExceptionHandler(MethodArgumentNotValidException.class)
    public ResponseEntity<String> handleValidationException(MethodArgumentNotValidException ex) {
        // 处理参数验证异常
        BindingResult bindingResult = ex.getBindingResult();
        List<ObjectError> errors = bindingResult.getAllErrors();
        // 构建错误信息
        StringBuilder errorMessage = new StringBuilder();
        for (ObjectError error : errors) {
            errorMessage.append(error.getDefaultMessage()).append("; ");
        }
        return ResponseEntity.badRequest().body(errorMessage.toString());
    }
}