Struts.xml
 <?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="resultTypes" namespace="/resultType" extends="struts-default">
              <!--默认重定向-->
              <action name="result1">
             <result type="dispatcher" >/jsp/resultType/resultType_result1.jsp</result>
         </action>

         <!---转发-->
         <action name="result2">
             <result type="redirect">/jsp/resultType/resultType_result2.jsp</result>
         </action>

         <!--重定向至result1Action-->
         <action name="result3">
             <result type="chain">result1</result>
         </action>

         <!--转发到转发result2Action-->
         <action name="result4">
             <result type="redirectAction">result2</result>
         </action>
     </package>
 </struts>

 <?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">

         <!--共享于package的全局文件-->
         <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>

     <!--通过exrtend获得全局文件-->
     <package name="admin" namespace="/admin" extends="user">
         <action name="admin" class="com.bjsxt.struts2.user.action.AdminAction">
             <result>/admin.jsp</result>
         </action>
     </package>
 </struts>

 1、Struts.xml
   <package name="user" namespace="/user" extends="struts-default">
         <action name="hello" class="com.aaron.UserAction">
             <result>${result}</result>
         </action>
     </package>
 2、UserAction.java
 public class UserAction extends ActionSupport {
     int type;
     String result;

     @Override
     public String execute() throws Exception {
         System.out.println(type);
         if (type == 1) {
             result = "/jsp/DynamicResult/success.jsp";
         } else if (type == 2) {
             result = "/jsp/DynamicResult/error.jsp";
         }
         return SUCCESS;
     }

     public int getType() {
         return type;
     }

     public void setType(int type) {
         this.type = type;
     }

     public String getResult() {
         return result;
     }

     public void setResult(String result) {
         this.result = result;
     }
 }

 1、Struts.xml
url?type=${type}