SpringBoot使用校验框架validation校验

0,maven引入
SpringBoot starter-web自动引入依赖

1, Bean代码

import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableId;
import lombok.Data;

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

@Data
public class UserBill implements Serializable {
    @TableId(type = IdType.INPUT)
    private Long id;

    @NotNull(message = "用户ID不能为空")
    private Long userId;
}

2, Controller代码

import javax.validation.Valid;

@RestController
public class UserBillController extends BaseController{

    @Resource
    private BillService billService;

    @RequestMapping(value = "/add", method = RequestMethod.POST)
    public Object add(@Valid UserBill userBill) {
        return ResponseUtil.getSuccessMap(billService.save(userBill));
    }
}

3, 异常处理

public class BaseController {

    @ExceptionHandler(value = Exception.class)
    public Object handleException(Exception e) throws ServletException, IOException {
        ExceptionUtils.printRootCauseStackTrace(e);

        //Bean校验失败信息返回
        if (e instanceof BindException) {
            List<ObjectError> list = ((BindException) e).getBindingResult().getAllErrors();
            return ResponseUtil.getNotNormalMap(list.get(list.size() - 1).getDefaultMessage());
        }

        return ResponseUtil.getExceptionMap();
    }

}

参考：
https://blog.csdn.net/u012373815/article/details/72049796