SpringMVC 异常处理-526互联

SpringMVC 异常处理

异常处理类ExceptionHandler

package com.tobie.globalexception;

import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.servlet.ModelAndView;

/**
 * @author Tobieance
 * @description 全局异常处理类
 * @date 2023-09-15 10:11
 */
@ControllerAdvice
public class GlobalExceptionHandler {
    /**
     * <h2>@ExceptionHandler：声明方法可以处理的异常类型</h2>
     *
     * @param e 要处理的异常
     * @return {@link String}
     */
    @ExceptionHandler(NameException.class)
    public ModelAndView doNameException(Exception e){
        ModelAndView modelAndView=new ModelAndView();
        System.out.println("------doNameException------");
        modelAndView.addObject("msg","用户名错误");
        modelAndView.addObject("e",e);
        modelAndView.setViewName("error");
        e.printStackTrace();
        return modelAndView;
    }

    @ExceptionHandler(PasswordException.class)
    public ModelAndView doPasswordException(Exception e){
        ModelAndView modelAndView=new ModelAndView();
        System.out.println("------doPasswordException------");
        modelAndView.addObject("msg","密码错误");
        modelAndView.addObject("e",e);
        modelAndView.setViewName("error");
        e.printStackTrace();
        return modelAndView;
    }

    /**
     * 此方法用于处理任意异常（上面两个方法不能处理的异常）
     *
     * @param e 异常
     * @return {@link ModelAndView}
     */
    @ExceptionHandler
    public ModelAndView doException(Exception e){
        ModelAndView modelAndView=new ModelAndView();
        System.out.println("------doException------");
        modelAndView.addObject("msg","系统异常");
        modelAndView.addObject("e",e);
        modelAndView.setViewName("error");
        e.printStackTrace();
        return modelAndView;
    }
}

ExceptionController异常处理控制器

package com.tobie.globalexception;

import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;

/**
 * @author Tobieance
 * @description 异常处理控制器
 * @date 2023-09-15 09:39
 */
@Controller
public class ExceptionController {
    @RequestMapping("exception")
    public String exception(String name, String password, ModelMap modelMap)throws Exception{
        //用户名判断
        if(!"tobie".equals(name)){
            //抛出用户名错误异常
            throw new NameException("用户名错误异常");
        }
        if(!"123".equals(password)){
            //抛出密码错误异常
            throw new PasswordException("密码错误异常");
        }
        modelMap.addAttribute("msg","账户名密码正确");
        return "result";
    }
}

Exception异常类

自定义用户名异常

package com.tobie.globalexception;

/**
 * @author Tobieance
 * @description 自定义用户名异常
 * @date 2023-09-15 09:46
 */
public class NameException extends Exception{
    public NameException(String message){
        super(message);
    }
}

密码异常

package com.tobie.globalexception;

/**
 * @author Tobieance
 * @description 密码异常
 * @date 2023-09-15 09:48
 */
public class PasswordException extends Exception{
    public PasswordException(String message){
        super(message);
    }
}

异常处理前端页面

<%--
  Created by IntelliJ IDEA.
  User: 87036
  Date: 2023-09-15
  Time: 09:38
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>SpringMVC 异常处理</title>
</head>
<body>
    <form action="exception" method="post">
        姓名：<input type="text" value="tobie" name="name"/><br/>
        密码：<input type="password" value="123" name="password"/><br/>
        <input type="submit" value="提交"/>
    </form>
</body>
</html>