spring入参校验注解与全局异常处理器

背景：@Validated 注解参数信息没有返回前端

接口入参

接口参数添加了相关校验注解

PS：若使入参对象校验注解生效，接口入参一定要加@Validated 或者@Valid注解

spring全局异常处理器

//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by FernFlower decompiler)
//

package com.test.web.error.handle;

import com.test.core.exception.BizException;
import com.test.core.vo.response.R;
import java.util.List;
import javax.validation.ConstraintViolationException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.validation.BindingResult;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.multipart.MaxUploadSizeExceededException;

@RestControllerAdvice
public class GlobalExceptionHandler {
    private static final Logger log = LoggerFactory.getLogger(GlobalExceptionHandler.class);
    private static final String UPLOAD_FILE_LIMIT = "上传的文件过大";

    public GlobalExceptionHandler() {
    }

    @ExceptionHandler({MethodArgumentNotValidException.class})
    @ResponseBody
    public R userCenterExceptionHandler(MethodArgumentNotValidException exception) {
        BindingResult result = exception.getBindingResult();
        StringBuilder sb = new StringBuilder();
        if (result.hasErrors()) {
            List<ObjectError> errors = result.getAllErrors();
            errors.forEach((p) -> {
                sb.append(p.getDefaultMessage()).append(" ");
            });
        }

        log.error(sb.toString());
        return R.error(sb.toString());
    }

    @ExceptionHandler({ConstraintViolationException.class})
    @ResponseBody
    public R validationConstraintViolationExceptionHandle(ConstraintViolationException ce) {
        StringBuilder sb = new StringBuilder();
        ce.getConstraintViolations().forEach((p) -> {
            sb.append(p.getMessage()).append(" ");
        });
        log.error(sb.toString());
        return R.error(ce.getMessage());
    }

    @ExceptionHandler({BizException.class})
    public R handleRRException(BizException e) {
        log.error(e.getMessage(), e);
        return R.error(e.getCode(), e.getMessage());
    }

    @ExceptionHandler({Exception.class})
    public R handleException(Exception e) {
        log.error(e.getMessage(), e);
        return e instanceof MaxUploadSizeExceededException ? R.error("上传的文件过大") : R.error();
    }
}

因为全局异常处理器，没有针对注解抛出的BindException异常类进行单独处理拦截，所以异常信息被Exception异常拦截住了，消化掉，没有返回给前端。
如果想前端直接看到参数拦截，需添加@ExceptionHandler({BindException.class})及其自定义实现方法，在异常e对象里面获取相关错误参数字段一级错误信息。拼装返回给前端。