为什么要使用全局异常处理器:如果不加以异常处理,错误信息肯定会抛在浏览器页面上,这样很不友好,所以必须进行异常处理。
异常处理思路
系统的dao、service、controller出现都通过throws Exception向上抛出,最后由springmvc前端控制器交由异常处理器进行异常处理,如下图:
创建异常处理器:GlobalException:
/*
* Copyright (c) 2020, 2024, All rights reserved.
*
*/
package com.by.exception;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* <p>Project: SpringMVC - GlobleException</p>
* <p>Powered by scl On 2024-01-10 14:09:52</p>
* <p>描述:<p>
*
* @author 孙臣龙 [1846080280@qq.com]
* @version 1.0
* @since 17
*/
@Component
public class GlobalException implements HandlerExceptionResolver {
@Override
public ModelAndView resolveException(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) {
/**
* 1.发邮件、发信息
* 2.跳转到错误页面
*/
ModelAndView modelAndView = new ModelAndView();
modelAndView.addObject("msg",e.getMessage());
modelAndView.setViewName("exception");
return modelAndView;
}
}
编写controller:ExceptionController:
/*
* Copyright (c) 2020, 2024, All rights reserved.
*
*/
package com.by.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
/**
* <p>Project: SpringMVC - execptionController</p>
* <p>Powered by scl On 2024-01-10 14:14:44</p>
* <p>描述:<p>
*
* @author 孙臣龙 [1846080280@qq.com]
* @version 1.0
* @since 17
*/
@Controller
@RequestMapping("/account")
public class ExceptionController {
@RequestMapping("/findException")
public String findException() throws Exception{
System.out.println(4/0);
return "exception";
}
}
在index.jsp里面定义超链接:
<a href="/account/findException">全局异常处理器</a>
结果展示:
项目结构:
文章来源:https://www.toymoban.com/news/detail-791506.html
项目配置可参考:Spring MVC文件上传!!!-CSDN博客文章来源地址https://www.toymoban.com/news/detail-791506.html
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