全局异常捕获工具类

package com.test.commons.exception;

import com.alibaba.fastjson.JSONObject;
import com.epro.commons.response.ArgumentCode;
import com.epro.commons.response.ResponseResult;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.StringUtils;
import org.springframework.validation.BindException;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import javax.validation.ConstraintViolation;
import javax.validation.ConstraintViolationException;
import java.util.*;

/**
 * @author 
 * @description: TODO
 * @date 2021/11/3 10:43
 */
@RestControllerAdvice
@Slf4j
public class RestExceptionHandler {


    /**
     * 处理Get请求的验证异常
     *
     * @param result
     * @return com.flyduck.cms.vo.ApiResult
     */
    @ExceptionHandler(BindException.class)
    public ResponseResult bindExceptionHandle(BindingResult result) {

        if (result.hasErrors()) {
            List errors = result.getAllErrors();
          /*  List list = new ArrayList<>();
            errors.forEach(p ->{
                FieldError fieldError = (FieldError) p;
                list.add(fieldError.getDefaultMessage());
            });*/
            HashSet set = new HashSet<>(errors);
            if (!errors.isEmpty() && !StringUtils.isEmpty(set.iterator().next().getDefaultMessage())) {
                return new ResponseResult(false, ArgumentCode.PARAMS_ERROR.getCode(), set.iterator().next().getDefaultMessage(), null);
            }

        }

        return new ResponseResult(ArgumentCode.PARAMS_ERROR);
    }

    /**
     * 处理Post请求的验证异常
     *
     * @param exception
     * @return com.flyduck.cms.vo.ApiResult
     */
    @ExceptionHandler(MethodArgumentNotValidException.class)
    public ResponseResult methodArgumentNotValidHandler(MethodArgumentNotValidException exception) {

        BindingResult result = exception.getBindingResult();
        if (result != null && result.hasErrors()) {
            List errors = result.getAllErrors();
            Set set=new HashSet<>(errors);
            //ArrayList objectErrors = new ArrayList<>(set);
            // 出现参数校验异常时,只需抛出第一条即可
            FieldError fieldError = (FieldError) set.iterator().next();
            if (!errors.isEmpty() && !StringUtils.isEmpty(fieldError.getDefaultMessage())) {
                int errorCode = ArgumentCode.PARAMS_ERROR.getCode();
                String msg =  fieldError.getDefaultMessage();
                return new ResponseResult(false, errorCode, msg, null);
            }

        }

        return new ResponseResult(ArgumentCode.PARAMS_ERROR);
    }

    /**
     * 处理请求参数格式的验证异常
     *
     * @param exception
     * @return com.flyduck.cms.vo.ApiResult
     */
    @ExceptionHandler(ConstraintViolationException.class)
    public ResponseResult constraintViolationHandler(ConstraintViolationException exception) {
        Set> violations = exception.getConstraintViolations();
        if (violations.size() > 0) {
            List list = new ArrayList<>();
            for (ConstraintViolation violation : violations) {
                list.add(violation.getMessage());
            }
            if (!list.isEmpty()) {
                return new ResponseResult(false, ArgumentCode.PARAMS_ERROR.getCode(), list.get(0), null);
            }
        }

        return new ResponseResult(ArgumentCode.PARAMS_ERROR);
    }

    @ExceptionHandler(CustomException.class)
    public ResponseResult exception(Exception e) {
        log.error("---------------------error:{}-------------------------", e.getMessage());
        Map map = JSONObject.parseObject(e.getMessage(), Map.class);
        return ResponseResult.create().msg((Integer) map.get("code"), (String) map.get("msg")).success((Boolean) map.get("success"));
    }

}