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Spring MVC -- 异常处理

程序员文章站 2024-03-15 18:19:36
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1.自定义一个异常处理器。当系统出现任何异常都会跳转到当前页面。

自定义异常处理器：

package com.allen.spring;

import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;

public class MyExceptionResolver implements HandlerExceptionResolver {
    @Override
    public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
        ModelAndView mv = new ModelAndView("error");
        if(ex instanceof IllegalArgumentException){
            mv.addObject("errorType","arguments is illegal");
        }
        mv.addObject("message",ex.getMessage());
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        ex.printStackTrace(new PrintStream(out,true));
        mv.addObject("stack",out.toString());
        return mv;
    }
}

controller：

package com.allen.spring;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Controller
public class RequestMappingControl {

    @RequestMapping("/hello.do")
    public ModelAndView helloWorld1(HttpServletRequest request, HttpServletResponse response){
        ModelAndView mv = new ModelAndView("user");
       if(request.getParameter("name").length() < 2){
           throw new IllegalArgumentException("argument count is less than 2, please check !");
       }
        return mv;
    }
}

error 页面：

<%--
  Created by IntelliJ IDEA.
  User: Administrator
  Date: 2019/11/13
  Time: 21:09
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Error Page</title>
</head>
<body>
   <b> you see this page because system have fatal error!!! </b>
<h3>error Message: ${message}</h3>
<h4>errorType : ${errorType}</h4>
<h5>stack : ${stack}</h5>
</body>
</html>

需要不自定义的异常处理器加入到spring bean管理。

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    <bean class="com.allen.spring.RequestMappingControl"/>

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"/>
        <property name="suffix" value=".jsp"/>
        <property name="viewClass" value="org.springframework.web.servlet.view.InternalResourceView"/>
    </bean>
<bean class="com.allen.spring.MyExceptionResolver"/>


</beans>

结果测试：

Spring MVC -- 异常处理

Spring MVC -- 异常处理

相关标签： HandlerExceptionResolver Springmvc Exception

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