struts2的分页标签

1、准备tld文件

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<taglib xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.0" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd">
  <description><![CDATA["To make it easier to access dynamic data;
                        the Apache Struts framework includes a library of custom tags.
                        The tags interact with the framework's validation and internationalization features;
                        to ensure that input is correct and output is localized.
                        The Struts Tags can be used with JSP FreeMarker or Velocity."]]></description>
  <display-name>LetGo</display-name>
  <tlib-version>1.0</tlib-version>
  <short-name>voice</short-name>
  <uri>/page-tags</uri>
  <tag>
    <description><![CDATA[Render a paging link tag]]></description>
    <name>paging</name>
    <tag-class>com.page.PagingAction</tag-class>
    <body-content>empty</body-content>
    <attribute>
      <description><![CDATA[current page index]]></description>
      <name>currPage</name>
      <required>true</required>
      <rtexprvalue>false</rtexprvalue>
    </attribute>
    <attribute>
      <description><![CDATA[The total page]]></description>
      <name>totalPage</name>
      <required>true</required>
      <rtexprvalue>false</rtexprvalue>
    </attribute>
    <attribute>
      <description><![CDATA[The page max]]></description>
      <name>pageMax</name>
      <required>true</required>
      <rtexprvalue>false</rtexprvalue>
    </attribute>
    <attribute>
      <description><![CDATA[total link number for show]]></description>
      <name>count</name>
      <required>true</required>
      <rtexprvalue>false</rtexprvalue>
    </attribute>
  </tag>
</taglib>

2、写相应的处理类 继承的是 jsp-api.jar 中 SimpleTagSupport，在该类中同时也可以设置各个按钮的js事件....

package com.page;

import java.io.IOException;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.SimpleTagSupport;

import com.opensymphony.xwork2.ActionContext;

public class PagingAction extends SimpleTagSupport{

    private String currPage;
    private String totalPage;
    private String pageMax;
    private String count;

    /**
     * 返回  
     * @return 
     */
    public String getCurrPage() {
        return currPage;
    }

    /**
     * 设置  
     * @param 
     */
    public void setCurrPage(String currPage) {
        this.currPage = currPage;
    }

    /**
     * 返回  
     * @return 
     */
    public String getTotalPage() {
        return totalPage;
    }

    /**
     * 设置  
     * @param 
     */
    public void setTotalPage(String totalPage) {
        this.totalPage = totalPage;
    }

    /**
     * 返回  
     * @return 
     */
    public String getPageMax() {
        return pageMax;
    }

    /**
     * 设置  
     * @param 
     */
    public void setPageMax(String pageMax) {
        this.pageMax = pageMax;
    }

    /**
     * 返回  
     * @return 
     */
    public String getCount() {
        return count;
    }

    /**
     * 设置  
     * @param 
     */
    public void setCount(String count) {
        this.count = count;
    }

    @Override
    public void doTag() throws JspException, IOException {
        JspWriter write = getJspContext().getOut();
        StringBuffer sb = new StringBuffer();
        sb.append("<div>")
        .append("<button name="first"><<</button>")
        .append("<button name="pre"><</button>")
        .append("<input type="text" name="inputName" style=" 45px;"/>")
        .append("<label>"+getValueFromStack(this.getCurrPage())+"/共"+getValueFromStack(this.getTotalPage())+"</label>")
        .append("<button name="next">></button>")
        .append("<button name="last">>></button>")
        .append("<div>");
        write.write(sb.toString());
    }
    
    /**
     * 在值栈中取出值
     * @param str
     * @return
     */
    private String getValueFromStack(String str){
        //取出时不要加%{},直接是存放在值栈中的变量名，此处获取到str是从页面标签传过的值，jia
        //加%{}用以区分这个是从值栈中取出，对于不加%{}的属性表示表单提交的变量名称 相当于<input 中的 name属性
        //action中的get方法名与之相同，则可获取由标签传递的值
        if(str.startsWith("%{")){
            str = str.substring(2,str.length()-1);
        }
        return (String) ActionContext.getContext().getValueStack().findValue(str);
    }

}

3、在jsp页面引用改标签

OK！！！