先看web.xml代码：

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
	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_2_5.xsd">
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  
  <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>
  
  <jsp-config>
	  <taglib>
		<taglib-uri>/tags/lpm</taglib-uri>           //跟上面定义的uri值一样
		<taglib-location>/WEB-INF/lpm.tld</taglib-location>   //写文件所在的路径
	  </taglib>
  </jsp-config>
  
</web-app>

?在看/WEB-INF/lpm.tld文件代码:

<?xml version="1.0" encoding="UTF-8"?>


<!DOCTYPE taglib PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.1//EN" "http://java.sun.com/j2ee/dtds/web-jsptaglibrary_1_1.dtd">

<taglib>
    <tlibversion>1.2</tlibversion>
    <jspversion>1.1</jspversion>
    <shortname>lpm</shortname>           <!-- 使用标签时的前缀 -->
    <uri>/tags/lpm</uri>
    
    <tag>
        <name>mytaglib</name>            <!-- 使用时跟在前缀后的名字，组合成一个标签 -->
        <tagclass>com.china.page.taglibpage</tagclass>      <!-- 在这里写刚才定义好的类 -->
        <bodycontent>jsp</bodycontent>  <!--可以为empty和jsp，如果为empty,开始标签和结束标签之间如果有jsp内容就会出错  -->
        <attribute>
          <name>formid</name>       <!--定义此标签可以用的属性名-->
          <required>true</required>   <!-- 表示这个属性是否可以为空,为true一定要有属性值 -->
          <rtexprvalue>true</rtexprvalue>   <!-- 表示是否可以使用JSP表达式 -->
        </attribute>
    </tag>
    
</taglib>

?

?

首页index.jsp加一个跳转：

     <a href="lpm/step.action">aaa</a>

?action代码:

package com.china.action;


import java.util.ArrayList;
import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.persistence.Query;
import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.ServletActionContext;
import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.Namespace;
import org.apache.struts2.convention.annotation.Result;

import com.china.model.persion;
import com.china.page.Pageinfo;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

@Namespace("/lpm")
public class Lpmcon extends ActionSupport{

	@Action(value="step",
			results={@Result(name="Today",location="/test/abc.jsp")})
	public String getRes(){
		HttpServletRequest request=ServletActionContext.getRequest();
		try{
			EntityManagerFactory ef=Persistence.createEntityManagerFactory("mysql");
		    EntityManager em=ef.createEntityManager();
		    Query qu=em.createQuery("from persion order by userid");
		   
		    int count=qu.getResultList().size();
		    
		    Pageinfo pageinfo=new Pageinfo();
		    pageinfo.setCount(count);
		    String temp=request.getParameter("curpage");
		    if(temp!=null){
		    	pageinfo.setCurpage(Integer.parseInt(temp));
		    }
		   
            List list=qu.setFirstResult((pageinfo.getCurpage()-1)*pageinfo.getPagesize())
		                .setMaxResults(pageinfo.getPagesize())
		                .getResultList();
			
            re