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SpringMVC异常处理之异常处理代码编写
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SpringMVC异常处理之异常处理代码编写
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<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:mvc="http://www.springframework.org/schema/mvc"xmlns:context="http://www.springframework.org/schema/context"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsd"><!-- 開啟注解掃描 --><context:component-scan base-package="com.learn"/><!-- 視圖解析器對象 --><bean id="internalResourceViewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/WEB-INF/pages/"/><property name="suffix" value=".jsp"/></bean><!--配置異常處理器--><bean id="sysExceptionResolver" class="com.learn.exception.SysExceptionResolver"/><!-- 開啟SpringMVC框架注解的支持 --><mvc:annotation-driven /></beans>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head><title>Title</title>
</head>
<body><h3>異常處理</h3><a href="user/testException" >異常處理</a></body>
</html>
package com.learn.controller;import com.learn.exception.SysException;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;@Controller
@RequestMapping("/user")
public class UserController {@RequestMapping("/testException")public String testException() throws SysException{System.out.println("testException執(zhí)行了...");try {// 模擬異常int a = 10/0;} catch (Exception e) {// 打印異常信息e.printStackTrace();// 拋出自定義異常信息throw new SysException("查詢所有用戶出現錯誤了...");}return "success";}}
package com.learn.exception;/*** 自定義異常類*/
public class SysException extends Exception{// 存儲提示信息的private String message;public String getMessage() {return message;}public void setMessage(String message) {this.message = message;}public SysException(String message) {this.message = message;}}
package com.learn.exception;import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;/*** 異常處理器*/
public class SysExceptionResolver implements HandlerExceptionResolver{/*** 處理異常業(yè)務邏輯* @param request* @param response* @param handler* @param ex* @return*/public ModelAndView resolveException(HttpServletRequest request,
HttpServletResponse response, Object handler, Exception ex) {// 獲取到異常對象SysException e = null;if(ex instanceof SysException){e = (SysException)ex;}else{e = new SysException("系統正在維護....");}// 創(chuàng)建ModelAndView對象ModelAndView mv = new ModelAndView();mv.addObject("errorMsg",e.getMessage());mv.setViewName("error");return mv;}}
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head><title>Title</title>
</head>
<body>${errorMsg}</body>
</html>
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