Interceptor用于异常捕获

最新推荐文章于 2025-03-18 10:15:33 发布

hurricane_li

最新推荐文章于 2025-03-18 10:15:33 发布

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Interceptor代码：

package com.hurricane.shop.interceptor;

import java.lang.reflect.Method;

import javax.servlet.http.HttpServletRequest;

import org.apache.log4j.Logger;
import org.apache.struts2.StrutsStatics;

import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.MethodFilterInterceptor;

public class PrivilegeInterceptor extends MethodFilterInterceptor{
	private Logger logger = Logger.getLogger(PrivilegeInterceptor.class);
	@Override
	protected String doIntercept(ActionInvocation invocation) throws Exception {
		logger.info("进入PrivilegeInterceptor");
		HttpServletRequest request = (HttpServletRequest) invocation.getInvocationContext().get(StrutsStatics.HTTP_REQUEST);
		String result;
		try {
			Object action = invocation.getAction();
			String methodName = invocation.getProxy().getMethod();
			Method method = action.getClass().getMethod(methodName, null);
			logger.info("action name is "+action.getClass().getName()+" method name is "+methodName+" method is "+method.toString());
			
			result = invocation.invoke();
			
		} catch (Exception e) {
			String errorMsg = "出现异常，请查看日志";
			if (e instanceof RuntimeException) {
				errorMsg = e.getMessage().trim();
			}
			request.setAttribute("errorMsg", errorMsg);
			logger.error(errorMsg,e);
			return "errorMsg";
		}
		return result;
	}

	

}

struts.xml中添加对该拦截器的使用：

		<interceptors>
			<interceptor name="privilege" class="com.hurricane.shop.interceptor.PrivilegeInterceptor">
				<param name="excludeMethods">regist</param>
			</interceptor>
			<interceptor-stack name="mystack">
				<interceptor-ref name="defaultStack"/>
				<interceptor-ref name="privilege"/>
			</interceptor-stack>
		</interceptors>
		<default-interceptor-ref name="mystack"/>

struts,xml中还应添加全局返回结果：

		<global-results>
			<result name="errorMsg">/WEB-INF/jsp/errorMsg.jsp</result>
		</global-results>

errorMsg.jsp:

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>


</head>
<body>
<h1><font color="red">${requestScope.errorMsg }</font></h1>
</body>
</html>

这样简单的异常处理就做好了