本文参考文章：http://blog.csdn.net/qjyong/article/details/3240303
一、标签处理类：
package cn.conris.sys.form; import java.io.IOException; import java.util.Enumeration; import javax.servlet.http.HttpServletRequest; import javax.servlet.jsp.JspException; import javax.servlet.jsp.tagext.TagSupport; import cn.conris.sys.utils.PropertyUtil; public class PageTag extends TagSupport { /** * 版本 */ private static final long serialVersionUID = 1L; private int pageSize = PropertyUtil.getPageSize(); // 每页要显示的记录数 private int pageNo = PropertyUtil.getPageNumber(); // 页号 private int recordCount; // 总记录数 private String url; // 目的地URL public void setPageSize(int pageSize) { this.pageSize = pageSize; } public void setPageNo(int pageNo) { this.pageNo = pageNo; } public void setRecordCount(int recordCount) { this.recordCount = recordCount; } public void setUrl(String url) { this.url = url; } // 主要的逻辑 @Override public int doStartTag() throws JspException { if(recordCount == 0){ return super.doStartTag(); } // 总页数 int pageCount = (recordCount + pageSize - 1) / pageSize; // 页号越界处理 if (pageNo > pageCount) { pageNo = pageCount; } if (pageNo < 1) { pageNo = 1; } StringBuilder sb = new StringBuilder(); sb.append("<form name='pageController' id='pageController' action='' method='post'> ") .append("<input type='hidden' id='pageNo' name='pageNo' value='" + pageNo + "' /> "); //------------------------------------ 获取所有請求中的参数 HttpServletRequest request = (HttpServletRequest) pageContext .getRequest(); Enumeration<String> enumeration = request.getParameterNames(); String name = null; String value = null; //把请求中的所有参数当作隐藏表单域在页面中写出) while (enumeration.hasMoreElements()) { name = enumeration.nextElement(); value = request.getParameter(name); // 去除页号 if (name.equals("pageNo")) { if (null != value && !"".equals(value)) { pageNo = Integer.parseInt(value); } continue; } sb.append("<input type='hidden' name='") .append(name) .append("' value='") .append(value) .append("'/> "); } //---------------------------------------------------- sb.append(" 共" + pageCount + "页  ") .append("当前第" + pageNo + "页   ") .append("共" + recordCount + "条   "); if (pageNo == 1) { sb.append("首页"); sb.append(" "); sb.append("上一页 "); } else { sb.append("<a href='#' onclick='turnOverPage(1)'>首页</a> "); sb.append(" "); sb.append("<a href='#' onclick='turnOverPage(") .append((pageNo - 1)).append(")'>上一页</a> "); } sb.append(" "); if (pageNo == pageCount) { sb.append("下一页"); sb.append(" "); sb.append("尾页 "); } else { sb.append("<a href='#' onclick='turnOverPage(") .append((pageNo + 1)).append(")'>下一页</a> "); sb.append(" "); sb.append("<a href='#' onclick='turnOverPage(").append(pageCount) .append(")'>尾页</a> "); } sb.append(" 跳到<select style='80px;' onChange='turnOverPage(this.value)'> "); for (int i = 1; i <= pageCount; i++) { if (i == pageNo) { sb.append(" <option value='") .append(i) .append("' selected='selected'>第") .append(i) .append("页</option> "); } else { sb.append(" <option value='") .append(i) .append("'>第") .append(i) .append("页</option> "); } } sb.append("</select> "); sb.append("  "); sb.append("</form> "); // 生成提交表单的JS sb.append("<script language='javascript'>"); // sb.append(" //翻页函数/t/n"); sb.append(" function turnOverPage(no){"); sb.append(" var form = document.pageController;"); // sb.append(" //页号越界处理"); sb.append(" if(no").append(">").append(pageCount).append(") {"); sb.append(" no=").append(pageCount).append(";"); sb.append(" }"); sb.append(" if(no").append("< 1){"); sb.append(" no=1;"); sb.append(" }"); sb.append(" form.").append("pageNo").append(".value=no;"); sb.append(" form.action='").append(url).append("';"); sb.append(" form.submit();"); sb.append(" }"); sb.append("</script>"); try { pageContext.getOut().println(sb.toString()); } catch (IOException e) { e.printStackTrace(); } return super.doStartTag(); } }
二、标签库描述文件：
<?xml version="1.0" encoding="UTF-8"?> <taglib version="2.0" 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"> <tlib-version>2.0</tlib-version> <short-name>my</short-name> <uri>http://conris/ModelSystem</uri> <tag> <description>通用分页标签</description> <name>pager</name> <tag-class>cn.conris.sys.form.PageTag</tag-class> <body-content>empty</body-content> <attribute> <name>pageNo</name> <required>true</required> <rtexprvalue>true</rtexprvalue> </attribute> <attribute> <name>recordCount</name> <required>true</required> <rtexprvalue>true</rtexprvalue> </attribute> <attribute> <name>pageSize</name> <required>true</required> <rtexprvalue>true</rtexprvalue> </attribute> <attribute> <name>url</name> <required>true</required> <rtexprvalue>true</rtexprvalue> </attribute> </tag> </taglib>
三、PropertyUtil工具类：
package cn.conris.sys.utils; import java.io.IOException; import java.io.InputStream; import java.util.Properties; public class PropertyUtil { private static Properties p = new Properties(); private static InputStream inputStream = null; static { inputStream = PropertyUtil.class .getResourceAsStream("/page.properties"); try { p.load(inputStream); } catch (IOException e) { e.printStackTrace(); } } public static int getPageSize() { return Integer.parseInt(p.getProperty("pageSize")); } public static int getPageNumber() { return Integer.parseInt(p.getProperty("pageNumber")); } public static void main(String[] args) { System.out.println(getPageSize()); } }
四、page.properties配置文件：
pageSize=5
pageNumber=1
五、action方法：
/** * @Title: findAllPlaneLibrary * @Description: 查询所有飞机实体 * @param @return 跳转到/entity_list.jsp * @return String 返回类型 * @throws */ public String findAllPlaneLibrary() { try { /** 查询飞机类型 **/ List<EntityLibrary> entityLibraryList = entityLibraryService .findEntityLibraryByBelongsLibrarycode("1000001"); request.setAttribute("entityLibraryList", entityLibraryList); /**分页条件查询**/ /**获取查询参数**/ String name = planeLibrary.getName(); String type = planeLibrary.getType(); List<PlaneLibrary> planeLibraryList = planeLibraryService.findAll(name,type,speedStart,speedEnd); String pageNoStr = request.getParameter("pageNo"); int pageNo = PropertyUtil.getPageNumber(); if (pageNoStr != null && !pageNoStr.equals("")) { pageNo = Integer.parseInt(pageNoStr); } int recordCount = planeLibraryList.size(); int pageSize = PropertyUtil.getPageSize(); int startNo = (pageNo - 1) * pageSize; List<PlaneLibrary> result = null; if (recordCount <= pageSize) { result = planeLibraryList; } else { if (startNo + pageSize > recordCount) { result = planeLibraryList.subList(startNo, recordCount); } else { result = planeLibraryList.subList(startNo, startNo + pageSize); } } if (planeLibraryList != null && planeLibraryList.size() > 0) { request.setAttribute("result", result); request.setAttribute("recordCount", recordCount); request.setAttribute("pageNo", pageNo); request.setAttribute("pageSize", pageSize); request.setAttribute("name", name); request.setAttribute("type", type); request.setAttribute("speedStart", speedStart); request.setAttribute("speedEnd", speedEnd); } } catch (Exception e) { e.fillInStackTrace(); } return "findAllPlaneLibrary"; }
七、Jsp页面配置
添加引用：
<%@ taglib uri="/mytaglib" prefix="mytag"%>
遍历查询结果集合：
<s:iterator value="#request.result" id="planeLibrary" status="i"> <tr> <td class="center_td"><s:property value="#i.index+1" /></td> <td><a href="#"><img class="thumbnails" alt="#" src="../<s:property value="#planeLibrary.imagepath"/>" width="64px" height="64px" /> <s:property value="#planeLibrary.name" /> </a></td> <td><s:property value="#planeLibrary.type" /></td> <td><s:property value="#planeLibrary.speed" /></td> <td><s:property value="#planeLibrary.bombload" /></td> <td>4200</td> <td> <div class="btn-group"> <a href="../html/entity_view.html" class="btn" title="查看"><i class="icon-file"></i> </a> <a href="../html/entity_add.html" class="btn" title="修改"><i class="icon-pencil"></i> </a> <a class="btn" title="删除"><i class="icon-remove"></i> </a> </div> </td> </tr> </s:iterator>
查询条件回显：
<form class="form-search" action="planeLibrary_findAllPlaneLibrary.action" method="post"> 飞机名称： <input type="text" class="input-medium span2" name="name" value="<s:property value="#request.name"/>"> 飞机类型： <select class="drop_down" name="type"> <option value="全部">全部</option> <s:iterator value="#request.entityLibraryList" id="extendAttribute"> <s:if test="#request.type == #extendAttribute.name"> <option selected="selected" value="<s:property value="#extendAttribute.name"/>"><s:property value="#extendAttribute.name"/></option> </s:if> <s:else> <option value="<s:property value="#extendAttribute.name"/>"><s:property value="#extendAttribute.name"/></option> </s:else> </s:iterator> </select> 航速： <input type="text" name="speedStart" value="<s:property value="#request.speedStart"/>" class="input-medium span2"> ~ <input name="speedEnd" type="text" value="<s:property value="#request.speedEnd"/>" class="input-medium span2"> <button type="submit" class="btn"> <i class="icon-search"></i> 搜索 </button> </form>
添加分页条：
<div class="pagination pagination-centered"> <mytag:pager pageNo="${pageNo}" recordCount="${recordCount}" pageSize="${pageSize}" url="planeLibrary_findAllPlaneLibrary.action" /> </div>
八、注意
该分页标签支持条件查询分页（需要将查询条件回显到jsp页面），点击分页条会对该条件进行分页显示。
原理：点击分页条时，标签会将JSP页面中的所有文本框和下拉列表框转化成form表单提交。