处理分页的java代码 分页工具类 java

怎样用java实现分页显示

实现原理很简单，就是建立一个Page类，里面放当前访问的页数和每一页显示的记录行数。然后通过分页计算就可以得出下列数据。

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总页数 = 总记录数/每页大小,如果0!=总记录数%每页大小，那么总页数再+1。

当前页数。

表记录的起始位置=(当前页数-1)*每页大小。

总记录数（select count(*) from [表名] [where [条件]]。从数据库中查询得到)

每页大小，可以固定，也可以从页面传过来有了这几个参数之后，就用sql语句查出对应的记录就可以了。

Java是一种可以撰写跨平台应用程序的面向对象的程序设计语言。

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它最初被命名为Oak，目标设定在家用电器等小型系统的编程语言，来解决诸如电视机、电话、闹钟、烤面包机等家用电器的控制和通讯问题。

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Java的主要工作是通过编程语言来制作互联网页面、制作动态效果以及网站等技术。

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;

}

}

Java中实现分页效果的详细代码

head

%

const MaxPerPage=20

dim sql

dim rs

dim totalPut

dim CurrentPage

dim TotalPages

dim i,j

%

/head

body

%

conn = "DBQ=" + server.mappath("wj028.mdb") + ";DefaultDir=;DRIVER={Microsoft Access Driver (*.mdb)};"

sql = "SELECT * FROM USER order by id desc"

set rs=server.createobject("adodb.recordset")

rs.open SQL,conn,1,1

rs.MoveFirst

rs.pagesize=MaxPerPage

howmanyfields=rs.Fields.Count-1

If trim(Request("Page"))"" then

CurrentPage= CLng(request("Page"))

If CurrentPage rs.PageCount then

CurrentPage = rs.PageCount

End If

Else

CurrentPage= 1

End If

if rs.eof then

response.write "p align='center'没有记录!/p"

else

totalPut=rs.recordcount

if CurrentPage1 then

if (currentPage-1)*MaxPerPagetotalPut then

rs.move(currentPage-1)*MaxPerPage

dim bookmark

bookmark=rs.bookmark

end if

end if

dim n,k

if (totalPut mod MaxPerPage)=0 then

n= totalPut \ MaxPerPage

else

n= totalPut \ MaxPerPage + 1

end if%

% i=0

do while not rs.EOF and imaxperpage

%

%

rs.movenext

i=i+1

loop

%

第%=currentpage%页

共%=n%页

%

k=currentpage

if k1 then

response.write "[b"+"a href='list.asp?page=1'首页/a/b]"

response.write "[b"+"a href='list.asp?page="+cstr(k-1)+"'上一页/a/b]"

else

Response.Write "[首页][上一页]"

end if

if kn then

response.write "[b"+"a href='list.asp?page="+cstr(k+1)+"'下一页/a/b] "

response.write "[b"+"a href='list.asp?page="+cstr(n)+"'尾页/a/b] "

else

Response.Write "[下一页][尾页]"

end if

%

%

end if

set rs=nothing

set conn=nothing

%

/body