分页查询的java代码 java分页显示

用JAVA实现分页查询

可以定义一个实体类,该类包含ArrayList(n条记录),havePre(是否有上一页),havaNext(是否有下一个)和index(当前页码)。然后去数据库查数据,将数据封装成以上实体类就能实现了。

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谁能给我个完整的java 分页代码 谢谢了

import java.sql.Connection;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.util.Enumeration;

import javax.servlet.http.HttpServletRequest;

import com.lqh.dao.db.DBCon;

public class PageDAO {

public static final String Text = "text";

public static final String Image = "image";

public static final String BbsText = "bbstext";

public static final String BbsImage = "bbsimage";

private HttpServletRequest request;

private int currentpage = 1; // 当前是第几页

private int pagecount = 0; // 一共有多少页

private int rscount = 0; // 一共有多少行

private int pagesize = 10; // 每页有多少行[默认为20行]

public PageDAO(HttpServletRequest request) {

this.request = request;

}

public int getCurrentpage() {

return currentpage;

}

public void setCurrentpage(int currentpage) {

this.currentpage = currentpage;

}

public int getPagecount() {

return pagecount;

}

public void setPagecount(int pagecount) {

this.pagecount = pagecount;

}

public int getPagesize() {

return pagesize;

}

public void setPagesize(int pagesize) {

this.pagesize = pagesize;

}

public int getRscount() {

return rscount;

}

public void setRscount(int rscount) {

this.rscount = rscount;

}

/**

* 传入SQL语句获取总记录数

*/

public int getRsCountForRs(String sql) {

Connection conn = null;

PreparedStatement ps = null;

ResultSet rs = null;

DBCon dbcon=new DBCon();

try {

conn = dbcon.getConn();

ps = conn.prepareStatement(sql);

rs = ps.executeQuery();

if (rs.next()) {

rs.last();

this.rscount = rs.getRow();

} else {

this.rscount = 0;

}

} catch (Exception ex) {

ex.printStackTrace();

this.rscount = 0;

} finally {

dbcon.tryClose(rs, ps, conn);

}

return this.rscount;

}

public int getRsCountForSQL(String sql) {

Connection conn = null;

PreparedStatement ps = null;

ResultSet rs = null;

DBCon dbcon=new DBCon();

try {

conn = dbcon.getConn();

ps = conn.prepareStatement(sql);

rs = ps.executeQuery();

if (rs.next()) {

this.rscount = rs.getInt("rscount");

} else {

this.rscount = 0;

}

} catch (Exception ex) {

ex.printStackTrace();

this.rscount = 0;

} finally {

dbcon.tryClose(rs, ps, conn);

}

return this.rscount;

}

/**

* 获取总页数

*

* @return int

*/

public int getPageCount() {

try {

this.pagecount = ((this.rscount - 1) / this.pagesize) + 1;

} catch (Exception ex) {

this.pagecount = 0;

}

return this.pagecount;

}

/**

* 获取当前页码的设置

*

* @return int

*/

public int getCurrentPage() {

try {

if (this.request.getParameter("currentpage") != null

Integer.parseInt(this.request

.getParameter("currentpage")) 1) {

this.currentpage = Integer.parseInt(this.request

.getParameter("currentpage"));

} else {

this.currentpage = 1;

}

} catch (Exception ex) {

this.currentpage = 1;

}

return this.currentpage;

}

/**

* 分页工具条

*

* @param fileName

* String

* @return String

*/

public String pagetool(String flag) {

StringBuffer str = new StringBuffer();

String url = this.getParamUrl();

int ProPage = this.currentpage - 1;

int Nextpage = this.currentpage + 1;

// 文字的分页

if (flag.equals(PageDAO.Text)) {

str.append("form method='post' name='pageform' action=''");

str

.append("table style='color: windowframe' width='100%' border='0' cellspacing='0' cellpadding='0'");

str.append("tr");

str.append("td width='20%'/td");

str.append("td height='26'");

str.append("共有记录" + this.rscount + "条 ");

str.append("共" + this.pagecount + "页 ");

str.append("每页" + this.pagesize + "记录 ");

str.append("现在" + this.currentpage + "/" + this.pagecount + "页");

str.append("/tdtd");

if (this.currentpage 1) {

str.append("a href='" + url + "currentpage=1'首页/a");

str.append(" ");

str.append("a href='" + url + "currentpage=" + ProPage

+ "'上一页/a");

str.append(" ");

} else {

str.append("首页");

str.append(" ");

str.append("上一页");

str.append(" ");

}

if (this.currentpage this.pagecount) {

str.append("a href='" + url + "currentpage=" + Nextpage

+ "'下一页/a");

str.append(" ");

} else {

str.append("下一页");

str.append(" ");

}

if (this.pagecount 1 this.currentpage != this.pagecount) {

str.append("a href='" + url + "currentpage=" + pagecount

+ "'尾页/a");

str.append(" ");

} else {

str.append("尾页");

str.append(" ");

}

str.append("转到");

str

.append("select name='currentpage' onchange='javascript:ChangePage(this.value);'");

for (int j = 1; j = pagecount; j++) {

str.append("option value='" + j + "'");

if (currentpage == j) {

str.append("selected");

}

str.append("");

str.append("" + j + "");

str.append("/option");

}

str.append("/select页");

str.append("/tdtd width='3%' /td/tr/table");

str.append("script language='javascript'");

str.append("function ChangePage(testpage){");

str.append("document.pageform.action='" + url

+ "currentpage='+testpage+'';");

str.append("document.pageform.submit();");

str.append("}");

str.append("/script");

str.append("/form");

} else if (flag.equals(PageDAO.Image)) {

/**

* 图片的分页

*/

} else if (flag.equals(PageDAO.BbsText)) {

/**

* 论坛形式的分页[直接以数字方式体现]

*/

str

.append("table width='100%' border='0' cellspacing='0' cellpadding='0'");

str.append("tr");

str.append("td width='3%' /td");

str.append("td height='26'");

str.append("记录" + this.rscount + "条  ");

str.append("共" + this.pagecount + "页  ");

str.append("每页" + this.pagesize + "记录  ");

str.append("现在" + this.currentpage + "/" + this.pagecount + "页");

str.append("/tdtd");

// 设定是否有首页的链接

if (this.currentpage 1) {

str.append("a href='" + url + "currentpage=1'首页/a");

str.append("  ");

}

// 设定是否有上一页的链接

if (this.currentpage 1) {

str.append("a href='" + url + "currentpage=" + ProPage

+ "'上一页/a");

str.append("   ");

}

// 如果总页数只有10的话

if (this.pagecount = 10) {

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

if (this.currentpage == i) {

str.append("font color=red[" + i

+ "]/font  ");

} else {

str.append("a href='" + url + "currentpage=" + i

+ "'" + i + "/a  ");

}

}

} else {

// 说明总数有超过10页

// 制定特环的开始页和结束页

int endPage = this.currentpage + 4;

if (endPage this.pagecount) {

endPage = this.pagecount;

}

int startPage = 0;

if (this.pagecount = 8 this.currentpage = 8) {

startPage = this.currentpage - 5;

} else {

// 表示从第一页开始算

startPage = 1;

}

System.out.println(startPage);

System.out.println(endPage);

for (int i = startPage; i = endPage; i++) {

if (this.currentpage == i) {

str.append("font color=red[" + i

+ "]/font  ");

} else {

str.append("a href='" + url + "currentpage=" + i

+ "'" + i + "/a  ");

}

}

}

// 设定是否有下一页的链接

if (this.currentpage this.pagecount) {

str.append("a href='" + url + "currentpage=" + Nextpage

+ "'下一页/a");

str.append("  ");

}

// 设定是否有尾页的链接

if (this.pagecount 1 this.currentpage != this.pagecount) {

str.append("a href='" + url + "currentpage=" + pagecount

+ "'尾页/a");

str.append("  ");

}

str.append("/tdtd width='3%' /td/tr/table");

} else if (flag.equals(PageDAO.BbsImage)) {

/**

* 论坛形式的分页[以图片的方式体现]

*/

// 设定分页显示的CSS

str.append("style");

str

.append("BODY {FONT-SIZE: 12px;FONT-FAMILY:宋体;WIDTH: 60%; PADDING-LEFT: 25px;}");

str

.append("DIV.meneame {PADDING-RIGHT: 3px; PADDING-LEFT: 3px; FONT-SIZE: 80%; PADDING-BOTTOM: 3px; MARGIN: 3px; COLOR: #ff6500; PADDING-TOP: 3px; TEXT-ALIGN: center}");

str

.append("DIV.meneame A {BORDER-RIGHT: #ff9600 1px solid; PADDING-RIGHT: 7px; BACKGROUND-POSITION: 50% bottom; BORDER-TOP: #ff9600 1px solid; PADDING-LEFT: 7px; BACKGROUND-IMAGE: url('"

+ this.request.getContextPath()

+ "/meneame.jpg'); PADDING-BOTTOM: 5px; BORDER-LEFT: #ff9600 1px solid; COLOR: #ff6500; MARGIN-RIGHT: 3px; PADDING-TOP: 5px; BORDER-BOTTOM: #ff9600 1px solid; TEXT-DECORATION: none}");

str

.append("DIV.meneame A:hover {BORDER-RIGHT: #ff9600 1px solid; BORDER-TOP: #ff9600 1px solid; BACKGROUND-IMAGE: none; BORDER-LEFT: #ff9600 1px solid; COLOR: #ff6500; BORDER-BOTTOM: #ff9600 1px solid; BACKGROUND-COLOR: #ffc794}");

str

.append("DIV.meneame SPAN.current {BORDER-RIGHT: #ff6500 1px solid; PADDING-RIGHT: 7px; BORDER-TOP: #ff6500 1px solid; PADDING-LEFT: 7px; FONT-WEIGHT: bold; PADDING-BOTTOM: 5px; BORDER-LEFT: #ff6500 1px solid; COLOR: #ff6500; MARGIN-RIGHT: 3px; PADDING-TOP: 5px; BORDER-BOTTOM: #ff6500 1px solid; BACKGROUND-COLOR: #ffbe94}");

str

.append("DIV.meneame SPAN.disabled {BORDER-RIGHT: #ffe3c6 1px solid; PADDING-RIGHT: 7px; BORDER-TOP: #ffe3c6 1px solid; PADDING-LEFT: 7px; PADDING-BOTTOM: 5px; BORDER-LEFT: #ffe3c6 1px solid; COLOR: #ffe3c6; MARGIN-RIGHT: 3px; PADDING-TOP: 5px; BORDER-BOTTOM: #ffe3c6 1px solid}");

str.append("/style");

str.append("div class=\"meneame\"");

// 判定是否有上一页

if (this.currentpage 1) {

str.append("a href='" + url

+ "currentpage=1' hidefocus=\"true\"首页/a");

str.append("   ");

str.append("a href='" + url + "currentpage=" + ProPage

+ "' hidefocus=\"true\"上一页/a");

str.append("   ");

} else {

str.append("span class=\"disabled\"首页/span");

str.append("  ");

str.append("span class=\"disabled\"上一页/span");

str.append("  ");

}

// 显示中间的图片

if (this.pagecount = 10) {

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

if (this.currentpage == i) {

str.append("span class=\"current\"" + i + "/span");

} else {

str.append("a href='" + url + "currentpage=" + i

+ "' hidefocus=\"true\"" + i

+ "/a  ");

}

}

} else {

// 说明总数有超过10页

// 制定特环的开始页和结束页

int endPage = this.currentpage + 4;

if (endPage this.pagecount) {

endPage = this.pagecount;

}

int startPage = 0;

if (this.pagecount = 8 this.currentpage = 8) {

startPage = this.currentpage - 5;

} else {

// 表示从第一页开始算

startPage = 1;

}

System.out.println(startPage);

System.out.println(endPage);

for (int i = startPage; i = endPage; i++) {

if (this.currentpage == i) {

str.append("span class=\"current\"" + i + "/span");

} else {

str.append("a href='" + url + "currentpage=" + i

+ "' hidefocus=\"true\"" + i

+ "/a  ");

}

}

}

// 判断下一页和尾页

if (this.currentpage this.pagecount) {

if (this.currentpage this.pagecount - 10) {

str.append("...");

str.append("a href='" + url + "currentpage="

+ (this.pagecount - 1) + "' hidefocus=\"true\""

+ (this.pagecount - 1) + "/a  ");

str.append("a href='" + url + "currentpage="

+ this.pagecount + "' hidefocus=\"true\""

+ this.pagecount + "/a  ");

}

str.append("a href='" + url + "currentpage=" + Nextpage

+ "' hidefocus=\"true\"下一页/a");

str.append("  ");

} else {

str.append("span class=\"disabled\"下一页/span");

str.append("  ");

}

if (this.pagecount 1 this.currentpage != this.pagecount) {

str.append("a href='" + url + "currentpage=" + pagecount

+ "' hidefocus=\"true\"尾页/a");

str.append("  ");

} else {

str.append("span class=\"disabled\"尾页/span");

str.append("  ");

}

str.append("/div");

}

return str.toString();

}

public String getParamUrl() {

String url = "";

url = this.request.getRequestURI().toString();

if (url.indexOf("?") == -1) {

url = url + "?";

}

String totalParams = "";

Enumeration params = this.request.getParameterNames();// 得到所有参数名

while (params.hasMoreElements()) {

String tempName = params.nextElement().toString();

String tempValue = this.request.getParameter(tempName);

if (tempValue != null !tempValue.equals("")

!tempName.equals("currentpage")) {

if (totalParams.equals("")) {

totalParams = totalParams + tempName + "=" + tempValue;

} else {

totalParams = totalParams + "" + tempName + "="

+ tempValue;

}

}

}

String totalUrl = url + totalParams;

return totalUrl;

}

}

求java分页代码,急用!

package common.util;

import java.util.*;

public class PageController implements IPageModel {

private Collection model;

//数据总行数

private int totalRowCount = 0; //

//总页数

private int pageCount = 0;

//每页应显示的行数

private int maxPageRowCount = 0;

//当前页行数

private int currPageRowCount = 0;

//当前页号

private int currPageNum;

//默认构造

public PageController() {

super();

}

//传入模型

public PageController(Collection model) {

setPageController(model);

}

//设一个分页模型

public void setPageController(Collection model) {

this.model = model;

this.totalRowCount = model.size();

}

/**

* 总页数

* @return int

*/

public int getPageCount() {

return this.pageCount;

}

/**

* getPageContents

*

* @param intPageNum int

* @return Object

*/

public Object getPageContents(int intPageNum) {

//非法数据

if(intPageNum1){

intPageNum=1;

}

if(intPageNumpageCount){

intPageNum=pageCount;

}

//指定当前页

this.currPageNum=intPageNum;

int i = 0;

ArrayList arr = new ArrayList();

//如果是合法的范围

if (intPageNum 0 intPageNum = pageCount) {

//计算该页的开始号和结束号

int lfromrow = (intPageNum - 1) * maxPageRowCount;

arr = (ArrayList) getElementsAt(model, lfromrow, lfromrow + maxPageRowCount-1);

}

currPageNum=intPageNum;

return arr;

}

public Object getLastPage() {

return this.getPageContents(pageCount);

}

public Object getFirstPage() {

return this.getPageContents(0);

}

/**

* getCurrentPageRowsCount

*

* @return int

*/

public int getCurrentPageRowsCount() {

if(currPageNumpageCount){

return maxPageRowCount;

}

else{//最后一页

return totalRowCount-(pageCount-1)*maxPageRowCount;

}

}

public int getCurrentPageNum(){

return currPageNum;

}

/**

* setMaxPageRows

*

* @return int

*/

public void setMaxPageRows(int rowCount) {

maxPageRowCount = rowCount;

//计算总页数

if (totalRowCount % maxPageRowCount 0) { //有余数

pageCount = totalRowCount / maxPageRowCount + 1;

}

else {

pageCount = totalRowCount / maxPageRowCount;

}

}

/**

* getMaxPageRows

*/

public int getMaxPageRows() {

return maxPageRowCount;

}

//私有方法,返回集合中指定范围的数据

private Object getElementsAt(Collection model, int fromIndex, int toIndex) {

Iterator iter = model.iterator();

ArrayList arr = new ArrayList();

if (iter != null) {

int i = 0;

while (iter.hasNext()) {

Object obj=iter.next();

if (i = fromIndex i = toIndex) {

arr.add(obj);

}

if (i toIndex) {

break;

}

i = i + 1;

}

}

return arr;

}

}

各位前辈、求一套经典的java分页查询代码,不基于任何框架的,送上积分10、如够经典,另有积分送上,谢谢.

Pager类:

package bit.dlde.marx.util;

import java.math.*;

public class NewPager {

private int totalRows; //总行数

private int pageSize = 10; //每页显示的行数

private int currentPage; //当前页号

private int totalPages; //总页数

private int startRow; //当前页在数据库中的起始行

public NewPager() {

}

/**默认每页10个

* @param _totalRows

*/

public NewPager(int _totalRows) {

totalRows = _totalRows;

totalPages=totalRows/pageSize;

// System.out.println("总共的页数:"+totalPages);

int mod=totalRows%pageSize;

if(mod0){

totalPages++;

}

currentPage = 1;

startRow = 0;

}

/**可自定义每页显示多少数

* @param _totalRows

* @param _pageSize

*/

public NewPager(int _totalRows, int _pageSize) {

totalRows = _totalRows;

pageSize = _pageSize;

totalPages = totalRows / pageSize;

// System.out.println("总共的页数:"+totalPages);

int mod = totalRows % pageSize;

if (mod 0) {

totalPages++;

}

currentPage = 1;

startRow = 0;

}

public void first() {

currentPage = 1;

startRow = 0;

}

public void previous() {

if (currentPage == 1) {

return;

}

currentPage--;

startRow = (currentPage - 1) * pageSize;

}

public void next() {

if (currentPage totalPages) {

currentPage++;

}

startRow = (currentPage - 1) * pageSize;

}

public void last() {

currentPage = totalPages;

startRow = (currentPage - 1) * pageSize;

}

public void refresh(int _currentPage) {

currentPage = _currentPage;

if (currentPage totalPages) {

last();

}

}

public int getStartRow() {

return startRow;

}

public int getTotalPages() {

return totalPages;

}

public int getCurrentPage() {

return currentPage;

}

public int getPageSize() {

return pageSize;

}

public void setTotalRows(int totalRows) {

this.totalRows = totalRows;

}

public void setStartRow(int startRow) {

this.startRow = startRow;

}

public void setTotalPages(int totalPages) {

this.totalPages = totalPages;

}

public void setCurrentPage(int currentPage) {

this.currentPage = currentPage;

}

public void setPageSize(int pageSize) {

this.pageSize = pageSize;

}

public int getTotalRows() {

return totalRows;

}

}

PageService 类:

package bit.dlde.marx.util;

public class NewPagerService {

/**

* 功能描述:使用默认参数的

* br输入:

* br输出:

* br创建日期:Nov 6, 2008

*/

public NewPager getPager(String currentPage,String pagerMethod,int totalRows) {

// 定义pager对象,用于传到页面

NewPager pager = new NewPager(totalRows);

// System.out.println("执行到getPager了");

// 如果当前页号为空,表示为首次查询该页

// 如果不为空,则刷新pager对象,输入当前页号等信息

if (currentPage != null) {

pager.refresh(Integer.parseInt(currentPage));

// System.out.println("确认完当前的currentPage");

}else{

// currentPage="1";

pager.refresh(1);

}

// 获取当前执行的方法,首页,前一页,后一页,尾页。

// System.out.println("当前要执行的页面动作为:"+pagerMethod);

if (pagerMethod != null) {

if (pagerMethod.equals("first")) {

pager.first();

} else if (pagerMethod.equals("previous")) {

pager.previous();

} else if (pagerMethod.equals("next")) {

pager.next();

} else if (pagerMethod.equals("last")) {

pager.last();

}

}else{

pager.first();

}

return pager;

}

/**

* 功能描述:可自定义每页显示书目的

* br输入:

* br输出:

* br创建日期:Nov 6, 2008

*/

public NewPager getPager(String currentPage,String pagerMethod,int totalRows,int pageSize) {

// 定义pager对象,用于传到页面

NewPager pager = new NewPager(totalRows,pageSize);

// System.out.println("执行到getPager了");

// 如果当前页号为空,表示为首次查询该页

// 如果不为空,则刷新pager对象,输入当前页号等信息

if (currentPage != null) {

pager.refresh(Integer.parseInt(currentPage));

// System.out.println("确认完当前的currentPage");

}else{

// currentPage="1";

pager.refresh(1);

}

// 获取当前执行的方法,首页,前一页,后一页,尾页。

// System.out.println("当前要执行的页面动作为:"+pagerMethod);

if (pagerMethod != null) {

if (pagerMethod.equals("first")) {

pager.first();

} else if (pagerMethod.equals("previous")) {

pager.previous();

} else if (pagerMethod.equals("next")) {

pager.next();

} else if (pagerMethod.equals("last")) {

pager.last();

}

}else{

pager.first();

}

return pager;

}

}

调用示例:

/**

* 功能描述:前台列表

* br输入:

* br输出:

* br创建日期:Nov 6, 2008

*/

public String ExpListForFront() throws Exception {

int totalRow = expServ.getTotalRowsNum();

System.out.println(totalRow+" :totalRow");

pager = pagerService.getPager(this.getCurrentPage(), this

.getPagerMethod(), totalRow,36);//前台页面一页36个

this.setCurrentPage(String.valueOf(pager.getCurrentPage()));

this.setTotalRows(String.valueOf(totalRow));

availableItems = expServ.getRows(pager.getPageSize(), pager.getStartRow());

System.out.println("准备显示专家列表");

ListExperts explistemp = new ArrayListExperts();

for (Experts es : availableItems) {

es.setName(CharacterTrans.trans8859_1ToGBK(es.getName()));

es.setResume(CharacterTrans.trans8859_1ToGBK(es.getResume()));

es.setPhoto(CharacterTrans.trans8859_1ToGBK(es.getPhoto()));

es.setEditor(CharacterTrans.trans8859_1ToGBK(es.getEditor()));

es.getExpertType().setTempname(CharacterTrans.trans8859_1ToGBK(es.getExpertType().getName()));

explistemp.add(es);

}

this.setItEx(explistemp.iterator());

System.out.println("显示专家列表完毕");

return SUCCESS;

}

页面上设置:

div id="pageflip"

s:property value="totalRows" /

行  第

s:property value="currentPage" /

页  共

s:property value="pager.getTotalPages()" /

页 

a

href="s:url value="expListForFront.action"

s:param name="currentPage" value="currentPage"/

s:param name="pagerMethod" value="'first'"/

/s:url"首页/a

a

href="s:url value="expListForFront.action"

s:param name="currentPage" value="currentPage"/

s:param name="pagerMethod" value="'previous'"/

/s:url"上一页/a

a

href="s:url value="expListForFront.action"

s:param name="currentPage" value="currentPage"/

s:param name="pagerMethod" value="'next'"/

/s:url"下一页/a

a

href="s:url value="expListForFront.action"

s:param name="currentPage" value="currentPage"/

s:param name="pagerMethod" value="'last'"/

/s:url"尾页/a

/div


当前名称:分页查询的java代码 java分页显示
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