Java分页代码（JFIS)

TpageList 类

package jfis.util;

import java.util.List;

public class TPageList {

private TPages 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 TPages getPage() {

return page ;

}

public void setPage(TPages page) {

this . page = page;

pageStr =page.getLastPageBreak();

}

public String getPageStr() {

return pageStr ;

}

public void setPageStr(String pageStr) {

this . pageStr = pageStr;

}

}

Tpages 类

package jfis.util;

import javax.servlet.http.HttpServletRequest;

public class TPages {

private String fileName = "" ;

private int pageSize =2; //页大小

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

private int a ; //分拆list结果集的变量（相当与游标）。可从list中的确定位置开始读数据

// String bian = request.getParameter("aaa")==null?"0":"5";

// this.a = new Integer(bian);

public int getA() {

return a ;

}

public void setA( int a) {

this . a = a;

}

public TPages(){

}

public TPages(String fileName,HttpServletRequest request){

this . fileName =fileName;

//获得当前页

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

this . a = request.getParameter( "aaa" )== null ? 0 : new Integer(request.getParameter( "aaa" ));

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=/"right/" 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( "&aaa=" );

str.append( this . a -5);

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( "&aaa=" );

str.append( this . a +5);

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( "</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;

}

}

DAO 里的方法

// 分页

public TPageList pageSearchlist(TPages pages, List list) {

TPageList pageList = new TPageList();

// 记录集总行数

pages.setAllRecord(list.size());

// rs 用于保存从 list 中截取的记录

List rs = new ArrayList();

// 控制从 list 集合中的第几条开始读取 , 相当于游标

int a = pages.getA();

// for 循环中 "5" 代表一次读出多少条数据 :"a" 控制从 list 集合中的第几条开始读取 , 相当于游标。

for ( int i = 0; i < 5 && a < list.size(); a++) {

rs.add(list.get(a));

i++;

}

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 {

i++;

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

pageList.setPage(pages);

pageList.setObjectList(rs);

}

return pageList;

}

Action 里的方法

public ActionForward pageSearchList(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response) {

TPages pages = new TPages(

"/JFIS_CompanyManager/client/outer.do?method=pageSearchList" ,

request);

pages.setPageSize(5);

TPageList pageList = iouter .pageSearchlist(pages, iouter .getAllOuter());

request.setAttribute( "outers" , pageList);

return mapping.findForward( "outer_list" );

}

SSH 分页

说明：分页的两个类不变，只变Action和DAO。

Action 中

// 分页

public ActionForward pageSearchList(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response) {

Pages pages = new Pages( "/JFIS_CompanyManager/client/outer.do?method=pageSearchList" ,request);

pages.setPageSize(10);

PageList pageList = iouter .outerList(pages);

request.setAttribute( "outers" , pageList);

return mapping.findForward( "outer_list" );

}

DAO 中

// 分页

public PageList outerList(Pages pages) {

PageList pageList = new PageList();

List list = new ArrayList();

/*开启一个HibernateSession对象*/

Session session = this .getSession();

Transaction t = session.beginTransaction();

/* 获得结果集 */

Query query = session

.createQuery( "from jfis.bean.JfisClientItem order by starttime desc" );

/* 记录集总行数 */

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

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

query.setMaxResults(10); /*设置每页显示的记录数*/

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(); /*事务提交*/

session.close();

}

return pageList;

}