struts2 访问不存在的action时,自动跳转 博客分类: JavaJava Web struts404not foundaction不存在404跳转
struts 中访问不存在的action时,默认的会显示如下页面:
这显然不友好。能不能跳转到统一的action进行处理呢?
struts 可以做到。
struts.xml配置文件如下:
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd"> <struts> <constant name="struts.enable.DynamicMethodInvocation" value="false" /> <constant name="struts.devMode" value="true" /> <constant name="struts.ui.theme" value="simple" /> <constant name="struts.objectFactory" value="spring" /> <constant name="struts.xwork.chaining.copyMessages" value="true" /> <constant name="struts.multipart.maxSize" value="58871540" /><!-- 50 MB --> <constant name="struts.xwork.chaining.copyErrors" value="true" /> <package name="default" namespace="/" extends="struts-default"> <interceptors> <!-- <interceptor name="authorityInterceptor" class="com.shop.jn.interceptor.AuthorityInterceptor"></interceptor> --> <interceptor name="loggerInterceptor" class="com.shop.jn.interceptor.LoggerInterceptor"></interceptor> <interceptor name="loginTimesLimitInterceptor" class="com.shop.jn.interceptor.LoginTimesLimitInterceptor"></interceptor> <interceptor name="jsonIntercept" class="com.shop.jn.interceptor.JSONInterceptor"></interceptor> <!-- minimum interceptor stack --> <interceptor-stack name="minStack"> <interceptor-ref name="defaultStack"></interceptor-ref> <interceptor-ref name="loggerInterceptor"></interceptor-ref> <!-- --> </interceptor-stack> <!-- authority check when access resource --> <interceptor-stack name="authorityStack"> <interceptor-ref name="defaultStack"></interceptor-ref> <!-- <interceptor-ref name="authorityInterceptor"></interceptor-ref> --> <interceptor-ref name="loggerInterceptor"></interceptor-ref> </interceptor-stack> <!-- <interceptor-stack name="loginTimesLimitStack"> <interceptor-ref name="defaultStack"></interceptor-ref> <interceptor-ref name="loggerInterceptor"></interceptor-ref> <interceptor-ref name="loginTimesLimitInterceptor"></interceptor-ref> </interceptor-stack> --> </interceptors> <default-interceptor-ref name="authorityStack"></default-interceptor-ref> <!-- <default-action-ref name="index" /> --> <default-action-ref name="notFound" /> <global-results> <result name="error">/error.jsp</result> <result name="login2">/user/loginInput.jsp</result> </global-results> <action name="notFound" class="com.shop.jn.action.error.NotFoundErrerAction"> <result name="success">/not_found.jsp</result> </action> <!--<global-exception-mappings> <exception-mapping exception="java.lang.Exception" result="error" /> </global-exception-mappings> --><!--<action name="index"> <result type="redirectAction"> </result> </action> --> </package> <package name="goods22" extends="struts-default" namespace="/goods"> <action name="*Goods" class="{1}GoodsAction"> <result type="redirectAction"> <param name="namespace">/goods</param> <param name="actionName">viewGoods</param> </result> <result name="input">/input.jsp</result> </action> <!-- this is a exception ,must not use wildcard --> <action name="viewGoods" class="viewGoodsAction"> <result>/goods/viewGoods.jsp</result> </action> <action name="addInputGoods" class="addInputGoodsAction"> <result>/goods/addGoods.jsp</result> </action> <action name="updateInputGoods" class="updateInputGoodsAction"> <result>/goods/addGoods.jsp</result> </action> </package> <package name="supermarket22" extends="default" namespace="/supermarket"> <action name="*Supermarket" class="{1}SupermarketAction"> <result type="redirectAction"> <param name="namespace">/supermarket</param> <param name="actionName">viewSupermarket</param> </result> </action> <!-- this is a exception ,must not use wildcard --> <action name="viewSupermarket" class="viewSupermarketAction"> <result>/supermarket/viewSupermarket.jsp</result> </action> <action name="updateInputSupermarket" class="updateInputSupermarketAction"> <result>/supermarket/addSupermarket.jsp</result> </action> </package> </struts>
在上述struts.xml文件中,我配置了default-action-ref,默认action的名称是”notFound“,对应的java类是”com.shop.jn.action.error.NotFoundErrerAction“:
package com.shop.jn.action.error; import com.opensymphony.xwork2.ActionSupport; public class NotFoundErrerAction extends ActionSupport { private static final long serialVersionUID = 6218614965524501080L; @Override public String execute() throws Exception { System.out.println("您访问的action 不存在!"); return super.execute(); } }
访问notFound action时,跳转到的页面是:not_found.jsp,
not_found.jsp 内容如下:
<?xml version="1.0" encoding="UTF-8" ?> <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %> <!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" /> <title>Insert title here</title> </head> <body> <h1> <font color="red" >not found</font> </h1> </body> </html>
在浏览器中显示界面如下:
继续说明struts.xml文件:
package goods22继承了struts-default(struts默认的package),命名空间是”/goods“;而package supermarket22 继承了default(default中配置了默认的action),命名空间是”/supermarket“。
default 是我自定义的package。
我们在浏览器地址栏中输入:http://localhost:8080/shop_goods/supermarket/xxx.action
上述url对应的action是不存在的!
结果如下:
达到了我们的需求。
但是我 在浏览器地址栏中输入:
http://localhost:8080/shop_goods/goods/xxx.action
时,结果如下:
没有达到我们的需求,为什么没有跳转到默认action呢?
因为上述url对应的命名空间(namespace)是/goods,而该package 并没有继承default package。访问http://localhost:8080/shop_goods/supermarket/xxx.action 就可以到达默认action,因为supermarket 继承了default package 。
如何解决上述问题呢?
方式一:
删除package default 的namespace,这样不论package 目录结构如何只要找不到action,就会跳转到默认daction;
struts.xml 部分代码如下:
<package name="default" extends="struts-default"> <interceptors> <!-- <interceptor name="authorityInterceptor" class="com.shop.jn.interceptor.AuthorityInterceptor"></interceptor> --> <interceptor name="loggerInterceptor" class="com.shop.jn.interceptor.LoggerInterceptor"></interceptor> <interceptor name="loginTimesLimitInterceptor" class="com.shop.jn.interceptor.LoginTimesLimitInterceptor"></interceptor> <interceptor name="jsonIntercept" class="com.shop.jn.interceptor.JSONInterceptor"></interceptor> <!-- minimum interceptor stack --> <interceptor-stack name="minStack"> <interceptor-ref name="defaultStack"></interceptor-ref> <interceptor-ref name="loggerInterceptor"></interceptor-ref> <!-- --> </interceptor-stack> <!-- authority check when access resource --> <interceptor-stack name="authorityStack"> <interceptor-ref name="defaultStack"></interceptor-ref> <!-- <interceptor-ref name="authorityInterceptor"></interceptor-ref> --> <interceptor-ref name="loggerInterceptor"></interceptor-ref> </interceptor-stack> <!-- <interceptor-stack name="loginTimesLimitStack"> <interceptor-ref name="defaultStack"></interceptor-ref> <interceptor-ref name="loggerInterceptor"></interceptor-ref> <interceptor-ref name="loginTimesLimitInterceptor"></interceptor-ref> </interceptor-stack> --> </interceptors> <default-interceptor-ref name="authorityStack"></default-interceptor-ref> <!-- <default-action-ref name="index" /> --> <default-action-ref name="notFound" /> <global-results> <result name="error">/error.jsp</result> <result name="login2">/user/loginInput.jsp</result> </global-results> <action name="notFound" class="com.shop.jn.action.error.NotFoundErrerAction"> <result name="success">/not_found.jsp</result> </action> <!--<global-exception-mappings> <exception-mapping exception="java.lang.Exception" result="error" /> </global-exception-mappings> --><!--<action name="index"> <result type="redirectAction"> </result> </action> --> </package>
方式二:
让所有的package 都继承我自定义的package default