全局异常处理类

package main.java.com.example.demo.exceptionHandler;

import com.example.demo.exceptionHandler.MyException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import java.util.HashMap;
import java.util.Map;

@ControllerAdvice//定义统一的一场处理类
public class GlobalException {

    @ExceptionHandler(value = MyException.class)
    @ResponseBody
    public Map<String, String> jsonErrorHandler(HttpServletRequest request, MyException e) {
        Map<String, String> resultMap = new HashMap<>();
        resultMap.put("status", e.getCode());
        resultMap.put("msg", e.getMessage());
        return resultMap;
    }
    @ExceptionHandler(value = MyException.class)
    public ModelAndView defaultErrorHandler(HttpServletRequest request, MyException e) {
        ModelAndView mv = new ModelAndView();
        mv.addObject("exception",e);
        mv.addObject("url",request.getRequestURL());
        mv.setViewName("error");//定义默认的视图
        return mv;
    }
}

package com.example.demo.exceptionHandler;

public class MyException extends Exception {

    private String code;

    public MyException(String message) {
        super(message);
    }


    public MyException(String message, String code) {
        super(message);
        this.code = code;
    }

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }
}