Struts2配置拦截器

=============================java==============
import java.util.Map;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.Interceptor;
import com.zr.pojo.aged.home.ZaghUsers;


public class UtilInterceptor implements Interceptor  {

/**
* 实现登录拦截
*/
private static final long serialVersionUID = -532172353763647921L;

public void destroy() {
// TODO Auto-generated method stub

}

public void init() {
// TODO Auto-generated method stub

}

@SuppressWarnings("unchecked")
public String intercept(ActionInvocation invocation) throws Exception {
String methodName=null;
Map map = invocation.getInvocationContext().getParameters();
if (map == null || map.size() == 0) {
System.out.println("0");
} else {
String[] keys = new String[map.size()];
map.keySet().toArray(keys);
for (int i = 0; i < keys.length; i++) {
if (map.get(keys[i]) != null) {
String[] values = (String[])map.get(keys[i]);
for (int j = 0; j < values.length; j++) {
methodName=values[0];
}
}
}
}
  ActionContext ctx = invocation.getInvocationContext();
  Map session = ctx.getSession();
  // 取出名为user的session属性
  ZaghUsers user = (ZaghUsers) session.get("userbean");
  // 如果没有登陆，返回重新登陆
  if (user != null||(methodName!=null&&methodName.equalsIgnoreCase("User.checkUserLogin"))||(methodName!=null&&methodName.equalsIgnoreCase("Home.index"))) {
   return invocation.invoke();
  } else {
   return "/index.jsp";
  }
  //return invocation.invoke();
}



// @Override
// protected String doIntercept(ActionInvocation invocation) throws Exception {
// ActionProxy proxy=invocation.getProxy();
// String methodName=proxy.getMethod();
// Method method=null;
// method = proxy.getAction().getClass().getMethod(methodName, new Class[0]);
//// String methodName=proxy.getClass().getMethod(name, parameterTypes);
// // 取得请求相关的ActionContext实例
//   ActionContext ctx = invocation.getInvocationContext();
//   Map session = ctx.getSession();
//   // 取出名为user的session属性
//   ZaghUsers user = (ZaghUsers) session.get("userbean");
//   // 如果没有登陆，返回重新登陆
//   if (user != null||methodName.equalsIgnoreCase("checkUserLogin")) {
//    return invocation.invoke();
//   } else {
//    return "/tpl/html//home/Home/index.jsp";
//   }
// }

}
=====================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>

<!--*********************struts2 constant************************ -->
    <constant name="struts.i18n.encoding" value="UTF-8"/>
    <constant name="struts.custom.i18n.resources" value="messages"/>
<constant name= "struts.multipart.maxSize" value="52428800" />

<package name="default" extends="struts-default" >
<result-types>
<result-type name="direct" class="com.gctx.framework.struts2.dispatcher.DirectResultDispatcher"/>
</result-types>

  <!-- 定义一个名为 authority的拦截器 --> 
        <interceptors>
            <!-- 定义权限检查拦截器 --> 
            <interceptor name="requestAction"
                class="com.gctx.web.action.home.UtilInterceptor" />
                 
            <!-- 定义一个包含权限检查的拦截器栈 -->
            <interceptor-stack name="myDefaultStack"> 
                <!-- 定义拦截器栈包含authority拦截器 需要过滤的方法 index 要加在此 --> 
                <interceptor-ref name="requestAction">
    <param name="excludeMethods">*.index,*.checkUserLogin</param>
    </interceptor-ref>
                <interceptor-ref name="defaultStack"></interceptor-ref> 
            </interceptor-stack>
        </interceptors>
        <!-- 设置全局默认的拦截器栈-->
        <default-interceptor-ref name="myDefaultStack" />
</package>
<package name="all" extends="default">
<result-types>
<result-type name="direct" class="com.gctx.framework.struts2.dispatcher.DirectResultDispatcher"/>
</result-types>
    <action name="*" class="com.gctx.web.action.GenericBaseAction" >
    <result name="*" type="direct">direct</result>
    </action>
    </package>



</struts>