struts2自定义分页标签

struts2自定义分页标签至今一直在从事web开发，现在有个项目用struts2搭建的，做web嘛，分页是必须的，琢磨着写个通用分页标签一劳永逸，也在参考看了下他人写的，加上自己的一些理解，终于搞定，拿出来分享下，好了，费话不多说，coding开始：1:在WebRoot\WEB-INF下new一个tld标签文件：pageTag.tld<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE taglib PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN""/dtd/web-jsptaglibrary_1_2.dtd"><taglib><tlib-version>1.0</tlib-version><jsp-version>1.2</jsp-version><short-name>page_tags</short-name><uri>/page_tags</uri><display-name>"Pages Tags"</display-name><tag><name>pages</name><tag-class>com.page.PageTag</tag-class><attribute><!-- 当前页号--><name>pageNo</name><!-- 属性是否为必要的--><required>true</required><!-- 属性值是否动态产生--><rtexprvalue>true</rtexprvalue><!-- 属性的数据类型--><type>int</type></attribute><attribute><!-- 总记录数--><name>recordCount</name><required>true</required><rtexprvalue>true</rtexprvalue><type>int</type></attribute><attribute><!-- 每页显示多少条--><name>pageSize</name><required>true</required><rtexprvalue>true</rtexprvalue><type>int</type></attribute><attribute><!-- 跳转的Url --><name>url</name><required>true</required><rtexprvalue>true</rtexprvalue><type>ng.String</type></attribute></tag></taglib>2:new一个PageTag类继承TagSupport PageTag.javapackage com.page;import java.io.IOException;import java.util.Enumeration;import javax.servlet.http.HttpServletRequest; import javax.servlet.jsp.JspException;import javax.servlet.jsp.tagext.TagSupport; public class PageTag extends TagSupport{ /****/private static final long serialVersionUID = 1L;private int pageNo;private int recordCount;private int pageSize;private String url;@Overridepublic int doStartTag() throws JspException {// TODO Auto-generated method stubint pageCount = (this.recordCount+this.pageSize-1)/this.pageSize;StringBuilder sb = new StringBuilder();sb.append("<div class='cutpage' >");if(this.recordCount != 0){if(this.pageNo > pageCount){this.pageNo = pageCount;}if(this.pageNo < 1){this.pageNo = 1;}HttpServletRequest request = (HttpServletRequest)this.pageContext.getRequest();Enumeration e = request.getParameterNames();String name = null;String value = null;while (e.hasMoreElements()) {name = (String) e.nextElement();value = request.getParameter(name);if(name.equals("page")){if(value != null && !"".equals(value)){this.pageNo = Integer.parseInt(value);}else{sb.append("<input type='hidden'name=\"").append(name).append("\" value=\"").append(value).append("\"/>");}}}if(this.pageNo==1){sb.append("<a><span>上一页</span></a>");}else{sb.append("<a href='"+this.url+"?page ="+(this.pageNo-1)+"'><span>上一页</span></a>");}int start = 1;if(this.pageNo > 4){start = this.pageNo - 1;sb.append("<a href='"+this.url+"?page =1'><span>1</span></a>");sb.append("<a href='"+this.url+"?page =2'><span>2</span></a>");sb.append("...");}int end = this.pageNo + 1;if (end > pageCount) {end = pageCount;}for (int i = start; i <= end; i++) {if (this.pageNo == i){sb.append("<a href='javascript:void(0);'class=\"current\">").append("<span>"+i+"</span>").append("</a>");}else{sb.append("<ahref='"+this.url+"?page="+i+"'>").append("<span>"+i+"</span>").append("</a> ");}}if (end < pageCount - 2) {sb.append("...");}if (end < pageCount - 1) {sb.append("<a href='"+this.url+"?page="+(pageCount -1)+"'>").append("<span>"+(pageCount - 1)+"</span></a>");}if (end < pageCount) {sb.append("<ahref='"+this.url+"?page="+pageCount+"'>").append("<span>"+pageCount+"</ span></a>");}if (this.pageNo == pageCount)sb.append("<a><span>下一页").append("</a></span>");else {sb.append("<ahref='"+this.url+"?page="+(this.pageNo+1)+"'><span>下一页</span></a>");}}sb.append("</div>");try {this.pageContext.getOut().println(sb.toString());} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();return 0;}public void setPageNo(int pageNo) {this.pageNo = pageNo;}public int getRecordCount() {return recordCount;}public void setRecordCount(int recordCount) {this.recordCount = recordCount;}public void setPageSize(int pageSize) {this.pageSize = pageSize;}public void setUrl(String url) {this.url = url;}}3:Action里面package com.web;import java.util.List;import org.apache.struts2.ServletActionContext;import mon.DaoException;import com.dao.impl.TUserinfoDAOImpl;import erTypePage;import com.opensymphony.xwork2.Action;import com.opensymphony.xwork2.ActionSupport;public class UserTypePageAction extends ActionSupport{ /***/private static final long serialVersionUID = -18522325302568049L; private TUserinfoDAOImpl tuserinfoDAOImpl;private List<UserTypePage> ls;private int pageNo=1;private int pageSize = 6;private int recordCount;private String url;public String userTypeInfo(){try {......//逻辑就不写了} catch (DaoException e) {// TODO Auto-generated catch blocke.printStackTrace();}return Action.SUCCESS;}public TUserinfoDAOImpl getTuserinfoDAOImpl() {return tuserinfoDAOImpl;}public void setTuserinfoDAOImpl(TUserinfoDAOImpl tuserinfoDAOImpl) { this.tuserinfoDAOImpl = tuserinfoDAOImpl;}public void setUrl(String url) {this.url = url;}public String getUrl() {return url;}public void setLs(List<UserTypePage> ls) {this.ls = ls;}public List<UserTypePage> getLs() {return ls;}public void setPageNo(int pageNo) {this.pageNo = pageNo;}public int getPageNo() {return pageNo;}public void setRecordCount(int recordCount) {this.recordCount = recordCount;}public int getRecordCount() {return recordCount;}public void setPageSize(int pageSize) {this.pageSize = pageSize;}public int getPageSize() {return pageSize;}}4.JSP页面头部导入标签文件<%@ taglib prefix="tag" uri="/page_tags" %>………………<!-- 引入分页标签--><div class="page_div"><tag:pages pageSize="${pageSize}" pageNo="${pageNo}"url="userHXPageAction.do" recordCount="${recordCount}"></tag:pages> </div><!-- 分页标签结束-->。