@ notnull验证失败时返回响应代码为400

Question

我正在使用javax和Hibernate实现来验证我的请求有效负载。

版本-org.hibernate：hibernate-validator：5.4.1.final

Sample Pojo：

import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;
import java.io.Serializable;

    public class Customer implements Serializable{

        @NotNull(message="name is null")
        @Size(min = 1)
        public String name;
    }

示例控制器：

    @RequestMapping(value = {"/customer"}, method = RequestMethod.POST)
    @ResponseBody
    public Customer doAdd(@RequestBody @Valid Customer inData){
        //some logic
return outData
    }

这里customer.name为null时，我得到的响应代码为422（不可处理的实体）。但是我想返回400（错误请求）。如何在此处覆盖响应代码？任何文件参考将不胜感激。

注意-我不想在控制器端进行这些验证，我可以在哪里检查并相应地发送响应代码。像这样-How to return 400 http status code with @NotNull?

Answer 1

您应该在BindingResult之后立即设置Customer。喜欢：

@RequestMapping(value = {"/customer"}, method = RequestMethod.POST)
@ResponseBody
public Customer doAdd(@RequestBody @Valid Customer inData, BindingResult bindingResult){
    //some logic
    return outData
}

Answer 2

您可以使用RestControllerAdvice相同

@RestControllerAdvice
public class ExceptionRestControllerAdvice {

    @ExceptionHandler({ConstraintViolationException.class})
    @ResponseStatus(value = HttpStatus.BAD_REQUEST)
    public ExceptionResponseMessage handleInvalidParameterException(RuntimeException ex) {

        return sendResponse(HttpStatus.BAD_REQUEST, ex);
    }

    private ExceptionResponseMessage sendResponse(HttpStatus status, RuntimeException ex) {

        return new ExceptionResponseMessage(Instant.now(), status.value(), status.getReasonPhrase(),
                ex.getClass().toString(), ex.getMessage());
    }
}

public class ExceptionResponseMessage {

    private Instant time;
    private int status;
    private String error;
    private String exception;
    private String message;

    // setter and getter and constructor