AuthInterceptor

package dzxczx.blog.admin;

import com.opensymphony.xwork2.interceptor.Interceptor;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.ActionContext;
import java.util.Map;
public class AuthInterceptor implements Interceptor{
    public void init() {
        System.out.println("初始化");
    }
    
    public String intercept(ActionInvocation invocation) throws Exception{
        ActionContext ctx = ActionContext.getContext();
        Map<String, Object> session = ctx.getSession();
        System.out.print(1);
        if ((String)session.get("admin") != null) {
            return invocation.invoke();
        } else {
            return "error";
        }
    }
    public void destroy() {
        
    }
}

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
                      http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    version="3.0" metadata-complete="true">
    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>*.action</url-pattern>
    </filter-mapping>
</web-app>

struts.xml

<?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.devMode" value="true" />
    <constant name="struts.action.extension" value="action" />
    
    <package name="index" extends="struts-default">
        <action name="index" class="dzxczx.blog.IndexAction">
            <result name="success">/WEB-INF/content/index.jsp</result>
        </action>
    </package>
    <package name="admin" namespace="admin" extends="struts-default">
        <interceptors>
            <interceptor name="dzxczxauth" class="dzxczx.blog.admin.AuthInterceptor"></interceptor>
            <interceptor-stack name="dzxczxStack">
                <interceptor-ref name="dzxczxauth"/>
                <interceptor-ref name="defaultStack"/>
            </interceptor-stack>
        </interceptors>
        <action name="index" class="dzxczx.blog.admin.IndexAction">
            <result name="success">/WEB-INF/content/admin/index.jsp</result>
            <result name="error">/WEB-INF/content/error.jsp</result>
            <interceptor-ref name="dzxczxStack" />
        </action>
        <action name="login" class="dzxczx.blog.admin.LoginAction">
            <result name="success">/WEB-INF/content/admin/login.jsp</result>
        </action>
    </package>
</struts>

访问admin/index.action 控制台能输出自定义拦截器里的init方法的内容 但是 intercept方法不会输出东西 研究了好一会没研究明白 求助各位大神