jstl分页标签实现

标签类：
package cn.bugu_tag.page;
import java.io.IOException;
import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.jsp.JspException;
 import javax.servlet.jsp.tagext.TagSupport;/**
 *
 * @author Xiaoping Huang (​​​[e-mail]​​​)
 */
 public class BuguPageTag extends TagSupport {
 private int pageNum = 1;
 private int pages;
 private String url;@Override
 public int doStartTag() throws JspException {HttpServletRequest request = (HttpServletRequest) pageContext.getRequest();
 request.setAttribute("pageNum", pageNum);
 request.setAttribute("pages", pages);
 request.setAttribute("url", url);
 try {
 pageContext.include("/WEB-INF/template/page.jsp");
 } catch (ServletException e) {
 e.printStackTrace();
 } catch (IOException e) {
 e.printStackTrace();
 }
 return SKIP_BODY;
 } public String getUrl() {
 return url;
 }public void setUrl(String url) {
 this.url = url;
 }public int getPageNum() {
 return pageNum;
 } public void setPageNum(int pageNum) {
 this.pageNum = pageNum;
 } public int getPages() {
 return pages;
 } public void setPages(int pages) {
 this.pages = pages;
 }}
 
jsp页面：
<%@ page language="java" pageEncoding="UTF-8"%>
 <​​​%@taglib​​​ uri="​​http://java.sun.com/jsp/jstl/core​​​" prefix="c"%>
 <%@ taglib uri="​​​http://java.sun.com/jsp/jstl/functions​​​" prefix="fn" %>
 <style>
 @charset utf-8;
 .pagination{height:30px;vertical-align:middle;margin:5px 10px 0;}
 .pagination a{display:inline-block;margin-right:5px;width:25px;height:25px;line-height:25px;border:1px solid #ccc;text-align:center;text-decoration:none;color:#555;font-size:14px;overflow:hidden}
 .pagination a:hover{background-color:#FFEDE1;text-decoration:none;font-weight:700;border-color:#FD6D01}
 .pagination .current{display:inline-block;margin-right:5px;width:25px;height:25px;line-height:25px;border:1px solid #FD6D01;text-align:center;color:#555;font-size:14px;overflow:hidden;background-color:#FFEDE1;font-weight:700}
 .pagination a.pagenum{width:52px;height:25px}
 .pagination span{margin-right:5px;width:25px;height:25px;line-height:25px;display:inline-block;font-family:Tahoma,SimSun,Arial;font-size:12px;text-align:center;vertical-align:top;}
 .pagination .prev,.pagination .next{display:inline-block;margin-right:5px;width:50px;height:25px;line-height:25px;border:1px solid #ccc;text-align:center;color:#999;font-size:14px;overflow:hidden}
 .pagination .pagejump{width:auto;color:#666;vertical-align:top;padding:0 5px;}
 .pagination .pagejump input{width:30px;height:20px;text-align:center;font-family:Tahoma,SimSun,Arial;color:#000;border:1px solid #999;margin:0 5px}
 .pagination .pagejump button{width:50px;height:25px;cursor:pointer;border:1px solid #ccc;margin:0 0 0 5px}
 </style>
 <script type="text/javascript" src="/bugu_ui/jquery/jquery.min.js"></script>
 <script type="text/javascript">
 function beforeSubmit(){
 var re = /^[1-9][0-9]*$/;

 if(!re.test($("#pageNum1").val())){
 $("#pageNum1").val(1);
 }
 if($("#pageNum1").val()>${pages}){
 $("#pageNum1").val(${pages});

 }

 return true;
 }
 </script>
 <c:if test="${pages>0}">
 <div id="pagination" class="pagination">
 <form action="${url}" method="post" onSubmit="beforeSubmit()">
 <c:if test="${fn:indexOf(url,'?')==-1}">
 <c:choose>
 <c:when test="${pageNum==1}">
 <span class="prev">首页</span>
 <span class="prev">上一页</span>
 </c:when>
 <c:otherwise>
 <a href="${url}?pageNum=1" class="pagenum" >首页</a>
 <a href="${url}?pageNum=${pageNum-1}" class="pagenum" >上一页</a>
 </c:otherwise>
 </c:choose>
 <c:if test="${pageNum-3>0}">
 <a href="${url}?pageNum=${pageNum-3}" >${pageNum-3}</a>
 </c:if>
 <c:if test="${pageNum-2>0}">
 <a href="${url}?pageNum=${pageNum-2}" >${pageNum-2}</a>
 </c:if>
 <c:if test="${pageNum-1>0}">
 <a href="${url}?pageNum=${pageNum-1}" >${pageNum-1}</a>
 </c:if>
 <span class="current">${pageNum}</span>
 <c:if test="${pageNum+1<=pages}">
 <a href="${url}?pageNum=${pageNum+1}" >${pageNum+1}</a>
 </c:if>
 <c:if test="${pageNum+2<=pages}">
 <a href="${url}?pageNum=${pageNum+2}" >${pageNum+2}</a>
 </c:if>
 <c:if test="${pageNum+3<=pages}">
 <a href="${url}?pageNum=${pageNum+3}" >${pageNum+3}</a>
 </c:if>
 <c:choose>
 <c:when test="${pageNum==pages}">
 <span class="next">下一页</span>
 <span class="next">末页</span>
 </c:when>
 <c:otherwise>
 <a href="${url}?pageNum=${pageNum+1}" class="pagenum">下一页</a>
 <a href="${url}?pageNum=${pages}" class="pagenum" >末页</a>
 </c:otherwise>
 </c:choose>
 <span class="pagejump">共${count}条 跳到第<input type="text" value="${pageNum}" size="3" name="pageNum" id="pageNum1">页<button type="submit">确定</button></span>
 </c:if>
 <c:if test="${fn:indexOf(url,'?')!=-1}">
 <c:choose>
 <c:when test="${pageNum==1}">
 <span class="prev">首页</span>
 <span class="prev">上一页</span>
 </c:when>
 <c:otherwise>
 <a href="${url}&pageNum=1" class="pagenum" >首页</a>
 <a href="${url}&pageNum=${pageNum-1}" class="pagenum" >上一页</a>
 </c:otherwise>
 </c:choose>
 <c:if test="${pageNum-3>0}">
 <a href="${url}&pageNum=${pageNum-3}" >${pageNum-3}</a>
 </c:if>
 <c:if test="${pageNum-2>0}">
 <a href="${url}&pageNum=${pageNum-2}" >${pageNum-2}</a>
 </c:if>
 <c:if test="${pageNum-1>0}">
 <a href="${url}&pageNum=${pageNum-1}" >${pageNum-1}</a>
 </c:if>
 <span class="current">${pageNum}</span>
 <c:if test="${pageNum+1<=pages}">
 <a href="${url}&pageNum=${pageNum+1}" >${pageNum+1}</a>
 </c:if>
 <c:if test="${pageNum+2<=pages}">
 <a href="${url}&pageNum=${pageNum+2}" >${pageNum+2}</a>
 </c:if>
 <c:if test="${pageNum+3<=pages}">
 <a href="${url}&pageNum=${pageNum+3}" >${pageNum+3}</a>
 </c:if>
 <c:choose>
 <c:when test="${pageNum==pages}">
 <span class="next">下一页</span>
 <span class="next">末页</span>
 </c:when>
 <c:otherwise>
 <a href="${url}&pageNum=${pageNum+1}" class="pagenum">下一页</a>
 <a href="${url}&pageNum=${pages}" class="pagenum" >末页</a>
 </c:otherwise>
 </c:choose>
 <span class="pagejump">共${count}条 跳到第<input type="text" value="${pageNum}" size="3" name="pageNum" id="pageNum1">页<button type="submit">确定</button></span>
 </c:if>
 </form>
 </div>
 </c:if>
 <c:if test="${pages==0}">
 没有数据
 </c:if>tld文件
<?xml version="1.0" encoding="utf-8"?>
 <taglib xmlns="​​​http://java.sun.com/xml/ns/j2ee​​​"
 xmlns:xsi="​​​http://www.w3.org/2001/XMLSchema-instance​​​"
 xsi:schemaLocation="​​​http://java.sun.com/xml/ns/j2ee​​​ web-jsptaglibrary_2_0.xsd"
 version="2.0">
 <tlib-version>1.0</tlib-version>
 <short-name>pageTag</short-name>
 <!-- 定义该标签库的URI -->
 <uri>http://www.bugu_tag.cn/page</uri>
 <!-- 定义第一个标签 -->
 <tag>
 <!-- 定义标签名 -->
 <name>page</name>
 <!-- 定义标签处理类 -->
 <tag-class>cn.bugu_tag.page.BuguPageTag</tag-class>
 <!-- 定义标签体为空 -->
 <body-content>jsp</body-content>
 <attribute>
 <name>url</name>
 <required>false</required>
 <rtexprvalue>true</rtexprvalue>
 </attribute>
 <attribute>
 <name>pageNum</name>
 <required>false</required>
 <rtexprvalue>true</rtexprvalue>
 </attribute>
 <attribute>
 <name>pages</name>
 <required>false</required>
 <rtexprvalue>true</rtexprvalue>
 </attribute>

 </tag>
 </taglib>