Struts2学习 Result

1. 常用四种类型：

a)         dispatcher(默认，常用)——服务器跳转，url地址为action地址

b)         redirect（常用）——客户端跳转，url地址为jsp地址

c)         chain——forward到action

d)         redirectAction

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"><struts> <constant name="struts.devMode" value="true" /> <package name="resultType" namespace="/r" extends="struts-default"> <action name="r1" > <result type="dispatcher" > /r1.jsp </result> </action> <action name="r2" > <result type="redirect" > /r2.jsp </result> </action> <action name="r3" > <result type="chain" > r1 </result> </action> <action name="r4" > <result type="redirectAction" > r2 </result> </action> </package> </struts>

 

 

2.全局结果集——global-results | extends

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"><struts> <constant name="struts.devMode" value="true" /> <package name="user" namespace="/user" extends="struts-default"> <global-results> <result name="mainpage">/main.jsp</result> </global-results> <action name="index"> <result>/index.jsp</result> </action> <action name="user" class="com.bjsxt.struts2.user.action.UserAction"> <result>/user_success.jsp</result> <result name="error">/user_error.jsp</result> </action> </package> <package name="admin" namespace="/admin" extends="user"> <action name="admin" class="com.bjsxt.struts2.user.action.AdminAction"> <result>/admin.jsp</result> </action> </package></struts>

3. 动态结果（了解）——在action中保存一个属性，存储具体的结果location

${r}可以读取Value Stack中的内容（r）

在配置文件里网值栈中取值：

一定不要忘了为动态结果的保存值设置set get方法<ol> <li><a href="user/user?type=1" mce_href="user/user?type=1">返回success</a></li> <li><a href="user/user?type=2" mce_href="user/user?type=2">返回error</a></li>

 

  

4.传递参数—— 客户端跳转才需要传递

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"><struts> <constant name="struts.devMode" value="true" /> <package name="user" namespace="/user" extends="struts-default"> <action name="user" class="com.struts2.user.action.UserAction" > <result type="redirect" > /user_success.jsp?t=${type} </result> </action> </package> </struts>