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SSH自定义分页标签
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.JspWriter; import javax.servlet.jsp.tagext.SimpleTagSupport; import javax.servlet.jsp.tagext.TagSupport;import cn.conris.sys.utils.PropertyUtil;public class PageTag extends TagSupport { 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=http://www.mamicode.com/‘" + 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=http://www.mamicode.com/‘") .append(value) .append("‘/> "); } //---------------------------------------------------- sb.append(" 共" + pageCount + "页, ") .append("当前第" + pageNo + "页  "); if (pageNo == 1) { sb.append("首页"); sb.append(" "); sb.append("上一页 "); } else { sb.append("<a href=http://www.mamicode.com/‘#‘ onclick=‘turnOverPage(1)‘>首页 "); sb.append(" "); sb.append("<a href=http://www.mamicode.com/‘#‘ 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=http://www.mamicode.com/‘#‘ onclick=‘turnOverPage(") .append((pageNo + 1)).append(")‘>下一页</a> "); sb.append(" "); sb.append("<a href=http://www.mamicode.com/‘#‘ onclick=‘turnOverPage(").append(pageCount) .append(")‘>尾页</a> "); } sb.append(" 跳到<select style=‘width:80px;‘ onChange=‘turnOverPage(this.value)‘> "); for (int i = 1; i <= pageCount; i++) { if (i == pageNo) { sb.append(" <option value=http://www.mamicode.com/‘") .append(i) .append("‘ selected=‘selected‘>第") .append(i) .append("页</option> "); } else { sb.append(" <option value=http://www.mamicode.com/‘") .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=http://www.mamicode.com/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=5pageNumber=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 { List<PlaneLibrary> planeLibraryList = planeLibraryService.findAll(); 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); } } catch (Exception e) { e.fillInStackTrace(); } return "findAllPlaneLibrary"; }
六、web.xml配置
<!-- 配置自定义标签 --> <jsp-config> <taglib> <taglib-uri>/mytaglib</taglib-uri> <taglib-location>/WEB-INF/classes/pageTag.tld</taglib-location> </taglib> </jsp-config>
七、JSP页面配置
添加引用：
<%@ taglib uri="/mytaglib" prefix="mytag"%>
遍历集合：
<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="http://www.mamicode.com/#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>
添加分页条：
<div class="pagination pagination-centered"> <mytag:pager pageNo="${pageNo}" recordCount="${recordCount}" pageSize="${pageSize}" url="planeLibrary_findAllPlaneLibrary.action" />
</div>
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