Struts分页代码

声明：本文代码来自“西安健飞软件”内部，由小洋提供全套技术支持！在此感谢！

PageList 类

package com.hp.struts.util;

import java.util.List;

public class PageList {

private Pages page = null ; // 分页对象

private List objectList = null ; // 对象集合

private String pageStr = "" ; // 分页字符串

public List getObjectList() {

return objectList ;

}

public void setObjectList(List objectList) {

this . objectList = objectList;

}

public Pages getPage() {

return page ;

}

public void setPage(Pages page) {

this . page = page;

pageStr =page.getLastPageBreak();

}

public String getPageStr() {

return pageStr ;

}

public void setPageStr(String pageStr) {

this . pageStr = pageStr;

}

}

Pages 类

package com.hp.struts.util;

import javax.servlet.http.HttpServletRequest;

public class Pages {

private String fileName = "" ;

private int pageSize =2; // 当页显示记录数

private int allPage =1; // 总页数

private int cPage =1; // 当前页

private int sPage =1; // 当前页开始记录数

private int allRecord =1; // 总记录数

private String lastPageBreak = "" ; // 分页字符串

public Pages(){

}

public Pages(String fileName,HttpServletRequest request){

this . fileName =request.getContextPath()+fileName;

// 获得当前页

String cPageStr = request.getParameter( "cpage" )== null ? "1" :request.getParameter( "cpage" );

int cPageInt = 0;

try

{

cPageInt = Integer.parseInt(cPageStr);

} catch (Exception e){

System. out .println( "com.s6.util.Pages = " +e.getMessage());

cPageInt = 1;

} finally {

cPage = cPageInt;

}

}

// 计算总页数 , 判断当前页的合法性，计算当前页的开始记录数，生成分页字符串

public void doPage(){

// 计算总页数

this . allPage =( int )( this . allRecord + this . pageSize -1)/ this . pageSize ;

// 判断当前页的合法性

if ( this . cPage <0){

this . cPage =1;

}

if ( this . cPage > this . allPage ){

this . cPage = this . allPage ;

}

// 计算当前页开始记录数

this . sPage =( this . cPage -1)* this . pageSize +1;

// 生成分页字符串

StringBuffer str= new StringBuffer();

// 判断是否有问号 “ ？ ”

if ( this . fileName .indexOf( "?" )==-1){

this . fileName = this . fileName + "?1=1" ;

}

str.append( "<table width=/"100%/" height=/"100%/">" );

// 添加表单

str.append( "<form name=/"pagelist/" method=/"post/" action=/"" );

str.append( this . fileName + "/">" );

str.append( "<tr><td width=/"100%/" height=/"100%/" align=/"center/" valign=/"middle/">" );

str.append( " 总纪录数 " + this . allRecord + " 条 " );

str.append( "&nbsp;" );

// 首页

if ( this . cPage >1){

str.append( "<a href=" + this . fileName + "&cpage=1> 首页 </a>" );

} else {

str.append( " 首页 " );

}

str.append( "&nbsp;" );

// 上一页

if ( this . cPage >1){

str.append( "<a href=" );

str.append( this . fileName + "&cpage=" );

str.append( this . cPage -1);

str.append( "> 上一页 </a>" );

} else {

str.append( " 上一页 " );

}

str.append( "&nbsp;" );

// 下一页

if ( this . cPage < this . allPage ){

str.append( "<a href=" );

str.append( this . fileName + "&cpage=" );

str.append( this . cPage +1);

str.append( "> 下一页 </a>" );

} else {

str.append( " 下一页 " );

}

str.append( "&nbsp;" );

// 末页

if ( this . cPage < this . allPage ){

str.append( "<a href=" );

str.append( this . fileName + "&cpage=" );

str.append( this . allPage );

str.append( "> 末页 </a>" );

} else {

str.append( " 末页 " );

}

str.append( "&nbsp;" );

// 第几页

str.append( " 第 " );

str.append( this . cPage );

str.append( " 页 " );

str.append( "&nbsp;" );

// 共几页

str.append( " 共 " );

str.append( this . allPage );

str.append( " 页 " );

str.append( "&nbsp;" );

// 跳转页

for ( int i=1;i<= this . allPage ;i++){

str.append( "&nbsp;" );

if (i== this . cPage ){

str.append(i);

} else {

str.append( "<a href=" );

str.append( this . fileName + "&cpage=" );

str.append(i);

str.append( ">" +i+ "</a>" );

}

}

//str.append("&nbsp;&nbsp; 跳转到 ");

//str.append("<select name=/"cpage/" onchange=/"document.pagelist.submit()/" >");

//for(int i=1;i<=this.allPage;i++){

// str.append("<option value=/"");

// str.append(i);

// str.append("/"");

// if(this.cPage==i){

// str.append(" selected");

// }

// str.append(">");

// str.append(i);

// str.append("</option>");

//}

//str.append("</select> 页 ");

str.append( "</td></tr></form>" );

str.append( "</table>" );

lastPageBreak =str.toString();

}

public int getAllPage() {

return allPage ;

}

public void setAllPage( int allPage) {

this . allPage = allPage;

}

public int getCPage() {

return cPage ;

}

public void setCPage( int page) {

cPage = page;

}

public String getFileName() {

return fileName ;

}

public void setFileName(String fileName) {

this . fileName = fileName;

}

public String getLastPageBreak() {

return lastPageBreak ;

}

public void setLastPageBreak(String lastPageBreak) {

this . lastPageBreak = lastPageBreak;

}

public int getPageSize() {

return pageSize ;

}

public void setPageSize( int pageSize) {

this . pageSize = pageSize;

}

public int getSPage() {

doPage();

return sPage ;

}

public void setSPage( int page) {

sPage = page;

}

public int getAllRecord() {

return allRecord ;

}

public void setAllRecord( int allRecord) {

this . allRecord = allRecord;

}

}

Action 类里的分页方法（函数）

public ActionForward fenye(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response) {

String userId=request.getParameter( "userId" );

UserDAO userDao= new UserDAO();

Pages pages = new Pages( "/user.do?method=fenye" ,request);

pages.setPageSize(5); // 当前页显示的记录数

PageList pageList = userDao.getUserpagelist(pages);

request.setAttribute( "emps" ,pageList);

return mapping.findForward( "fenye" );

}

DAO 里的分页方法

public PageList getUserpagelist(Pages pages)

{

PageList pageList = new PageList();

List list = new ArrayList();

String sql= "select * from T_USER_SYS" ;

// 执行 SQL 语句获得结果集

ResultSet rs= this .doExcuteQuery(sql);

try {

// 首先将光标移动到最后一行

rs.last();

pages.setAllRecord(rs.getRow()); // 记录集总行数

rs.absolute(pages.getSPage()); // 光标定位到页的第一行

int i=0; // 循环变量

// 判断记录总行数是否大于 0 ，并循环创建 USER 对象

if (pages.getAllRecord()>0)

{

do {

UserBean userBean= new UserBean();

userBean.setUserId(rs.getString(1));

userBean.setUserName(rs.getString(2));

userBean.setUserPwd(rs.getString(3));

userBean.setUserState(rs.getString(4));

list.add(userBean);

i++;

} while (rs.next()&&i<pages.getPageSize());

}

} catch (SQLException e) {

e.printStackTrace();

} finally

{

this .closeConn();

}

pageList.setPage(pages);

pageList.setObjectList(list);

return pageList;

}

分页的 JSP 页面

<%@ page language = "java" pageEncoding = "UTF-8" %>

<%@ taglib uri = "http://struts.apache.org/tags-bean" prefix = "bean" %>

<%@ taglib uri = "http://struts.apache.org/tags-html" prefix = "html" %>

<%@ taglib uri = "http://struts.apache.org/tags-logic" prefix = "logic" %>

<%@ taglib uri = "http://struts.apache.org/tags-tiles" prefix = "tiles" %>

<%@ taglib uri = "http://java.sun.com/jsp/jstl/core" prefix = "c" %>

<! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" >

< html:html lang = "true" >

< head >

< html:base />

< title > fenye.jsp </ title >

< meta http-equiv = "pragma" content = "no-cache" >

< meta http-equiv = "cache-control" content = "no-cache" >

< meta http-equiv = "expires" content = "0" >

< meta http-equiv = "keywords" content = "keyword1,keyword2,keyword3" >

< meta http-equiv = "description" content = "This is my page" >

<!--

<link rel="stylesheet" type="text/css" href="styles.css">

-->

</ head >

< body >

< table >

< c:forEach items = "${emps.objectList}"var="emp">

< tr >

< td height = "25" align = "cneter" class = "table3" bgcolor = "dfdfdf" >

< input type = "checkbox" name = "ck2" value = "${emp.userId}"/></td>

< td align = "center" class = "table3" bgcolor = "dfdfdf" > ${emp.userName} </ td >

< td align = "center" valign = "middle" class = "table3" bgcolor = "dfdfdf" > ${emp.userPwd} </ td >

< td align = "center" valign = "middle" class = "table3" bgcolor = "dfdfdf" >

< html:link action = "/deluser.do?userId=${emp.userId}">del</html:link>

</ td >

</ tr >

</ c:forEach >

< tr >

< td align = "left" >< c:out value = "${emps.pageStr}"escapeXml="false"></c:out></td>

</ tr >

</ table >

</ body >

</ html:html >

SSH中的DAO

public PageList userList(Pages pages) {

PageList pageList = new PageList();

List list = new ArrayList();

Session session = this .getSession();

Transaction t = session.beginTransaction();

// 获得结果集

Query query = session.createQuery( "from jfis.bean.JfisUserSys" );

//记录集总行数

pages.setAllRecord(query.list().size());

query.setFirstResult(pages.getSPage()-1);

query.setMaxResults(5);

List rs = query.list();

Iterator iterator = rs.iterator();

// 得到分页字符串

pages.getSPage();

int i = 0; // 循环变量

// 判断记录总行数是否大于0，并循环创建USER对象

if (pages.getAllRecord() > 0) {

do {

list = rs;

i++;

} while (iterator.hasNext() && i < pages.getPageSize());

pageList.setPage(pages);

pageList.setObjectList(list);

t.commit();

session.close();

}

return pageList;

}