1，修改HeadFirstStruts2chapter02-02，改名：HeadFirstStruts2chapter02-03，修改web Project settings檔案，ForeStudent類繼承ActionSupport，BackStudent類繼承ActionSupport，
ForeStudent如下：
package com.cruise.action;

import com.opensymphony.xwork2.Action;

public class ForeStudent implements Action{


    @Override
    public

 String execute() throws Exception {
       System.out.println("ForeStudent執行了");
       return "success";
    }
}
BackStudent如下：
package com.cruise.action;

import com.opensymphony.xwork2.Action;

public class BackStudent implements Action{


    @Override
    public String execute() throws Exception {
       System.out.println("BackStudent執行了");
       return "success";
    }
}
2，修改struts.xml檔案，增加名稱空間，標籤的的name包名沒有什麼特殊的含義，namespace名稱空間，定義了名稱空間，需要在瀏覽器的位址列上增加名稱空間的字首，
3，刪除多餘的包和jsp，保留success.jsp 檔案，新建ForeAaction和BackAshley
4，struts.xml檔案：
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>
<package name="foreground" namespace="/fore" extends="struts-default">
    <action name="studentList" class="com.cruise.action.ForeStudent">
       <result name="success">${pageContext.request.comtextPath}/success.jspresult>
    action>
package>

<package name="background" namespace="/back" extends="struts-default">
    <action name="studentList" class="com.cruise.action.BackStudent">
       <result name="success">${pageContext.request.comtextPath}/success.jspresult>
    action>
package>
struts>

4, 測試瀏覽器輸入http://localhost:8080/HeadFirstStruts2chapter02_03/back/studentList
http://localhost:8080/HeadFirstStruts2chapter02_03/fore/studentList
5，修改struts.xml檔案，在back包下的action標籤中增加method屬性，用於指定哪個方法。
<?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>
<package name="foreground" namespace="/fore" extends="struts-default">
    <action name="studentList" class="com.cruise.action.ForeStudent">
       <result name="success">${pageContext.request.comtextPath}/success.jsp</result>
    </action>
</package>

<package name="background" namespace="/back" extends="struts-default">
    <action name="studentList" class="com.cruise.action.BackStudent" method="show">
       <result name="success">${pageContext.request.comtextPath}/success.jsp</result>
    </action>
</package>
</struts>
6，修改BackStudent類，增加show方法，
package com.cruise.action;

import com.opensymphony.xwork2.Action;

public class BackStudent implements Action{


    @Override
    public String execute() throws Exception {
       System.out.println("BackStudent執行了");
       return "success";
    }
    public String show()throws Exception{
       System.out.println("執行了BackStudent的show()方法");
       return "success";
    }
}
7, 測試瀏覽器輸入http://localhost:8080/HeadFirstStruts2chapter02_03/back/studentList