贴上我自己写的一个:
import java.sql.*;
public class page {String strDriver="com.microsoft.jdbc.sqlserver.SQLServerDriver";//加载驱动程序
String strConn="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=equipment_test";
private Connection conn = null;
private Statement stmt = null; //执行SQL语句
ResultSet rs = null;
private int pageSize; //每页显示数据的条数
private int pageCount; //总页数
private int nowPage; //当前页码
private int nextPage,beforePage; //上一页,下一页
private int lastRow;public page()
{
try{Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
}
catch(ClassNotFoundException e) {}
}//执行Select语句,引数sql为要执行的sql语句,currentPage为当前页码,pagS为每页显示的记录数
public ResultSet exeQuery(String sql,int currentPage,int pageS) throws SQLException{
this.nowPage=currentPage;
this.pageSize=pageS;
try {
conn = DriverManager.getConnection(strConn,"sa","sa"); //建立与数据源之间的连接
stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_READ_ONLY);
rs = stmt.executeQuery(sql); //反回结果集
if (!rs.next()) rs=null;
else{
rs.last();
lastRow=rs.getRow();
pageCount=(lastRow%pageSize==0)?(lastRow/pageSize):(lastRow/pageSize+1);
int posion=(nowPage-1)*pageSize+1;
rs.absolute(posion);
}
}catch(SQLException ex) {
System.out.println("执行SQL语句出错:" + ex.getMessage());
throw ex;}
return rs;
}//返回分页栏,为了简化代码,调用分页栏方法时必须先调用exeQuery方法,这样才能保证pageCount,currentPage的准确性
public String getPageStatus(String jspFile) throws SQLException{
String jspPage=jspFile;
String status;
nextPage=nowPage+1;// 下一页
beforePage=nowPage-1;//上一页
status="每页显示<font color=#660066><b>"+pageSize+"</b></font>条数据,总共有<font color=red><b>"+lastRow+"</b></font>条数据,当前页码为<font color=blue><b>"+nowPage+"</b></font>/<font color=green><b>"+pageCount+"</b></font> ";
if (pageCount==1)
status=status+"[首页][上一页][下一页][尾页]";
else if (nowPage==1)
status=status+"[首页][上一页][<a href="+jspPage+"currentPage="+nextPage+">下一页</a>][<a href="+jspPage+"currentPage="+pageCount+">尾页</a>]";
else if(nowPage==pageCount)
status=status+"[<a href="+jspPage+"currentPage=1>首页</a>][<a href="+jspPage+"currentPage="+beforePage+">上一页</a>][下一页][尾页]";
else
status=status+"[<a href="+jspPage+"currentPage=1>首页</a>][<a href="+jspPage+"currentPage="+beforePage+">上一页</a>][<a href="+jspPage+"currentPage="+nextPage+">下一页</a>][<a href="+jspPage+"currentPage="+pageCount+">尾页</a>]";
//跳转选择
status=status+" 转到第<select size=\"1\" name=\"D1\" onChange=\"redirect(this.options[this.selectedIndex].value)\">";
for(int index_loop=1;index_loop<=pageCount;index_loop++){
status=status+"<option value=\""+index_loop+"\"";
if(index_loop==nowPage) status=status+" selected";
status=status+">"+index_loop+"</option>";
}
status=status+"</select>页";
status=status+"<script language=javascript>";
status=status+"function redirect(x){";
status=status+"location=\""+jspPage+"currentPage=\"+x;";
status=status+"}</script>";
//跳转结束
return status;
}
//精简的分页栏
public String getPageStatus1(String jspFile) throws SQLException{
String jspPage=jspFile;
String status;
nextPage=nowPage+1;// 下一页
beforePage=nowPage-1;//上一页
status="总共有<font color=red><b>"+lastRow+"</b></font>条数据,当前页码为<font color=blue><b>"+nowPage+"</b></font>/<font color=green><b>"+pageCount+"</b></font> ";
if (pageCount==1)
status=status+"[首页][上一页][下一页][尾页]";
else if (nowPage==1)
status=status+"[首页][上一页][<a href="+jspPage+"currentPage="+nextPage+">下一页</a>][<a href="+jspPage+"currentPage="+pageCount+">尾页</a>]";
else if(nowPage==pageCount)
status=status+"[<a href="+jspPage+"currentPage=1>首页</a>][<a href="+jspPage+"currentPage="+beforePage+">上一页</a>][下一页][尾页]";
else
status=status+"[<a href="+jspPage+"currentPage=1>首页</a>][<a href="+jspPage+"currentPage="+beforePage+">上一页</a>][<a href="+jspPage+"currentPage="+nextPage+">下一页</a>][<a href="+jspPage+"currentPage="+pageCount+">尾页</a>]";
return status;
}public void closeStmt(){
try{
stmt.close();
}catch(SQLException e){
e.printStackTrace();
}
}public void closeConn(){
try{
conn.close();
}catch(SQLException e){
e.printStackTrace();
}
}
}
import java.sql.*;
public class page {String strDriver="com.microsoft.jdbc.sqlserver.SQLServerDriver";//加载驱动程序
String strConn="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=equipment_test";
private Connection conn = null;
private Statement stmt = null; //执行SQL语句
ResultSet rs = null;
private int pageSize; //每页显示数据的条数
private int pageCount; //总页数
private int nowPage; //当前页码
private int nextPage,beforePage; //上一页,下一页
private int lastRow;public page()
{
try{Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
}
catch(ClassNotFoundException e) {}
}//执行Select语句,引数sql为要执行的sql语句,currentPage为当前页码,pagS为每页显示的记录数
public ResultSet exeQuery(String sql,int currentPage,int pageS) throws SQLException{
this.nowPage=currentPage;
this.pageSize=pageS;
try {
conn = DriverManager.getConnection(strConn,"sa","sa"); //建立与数据源之间的连接
stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_READ_ONLY);
rs = stmt.executeQuery(sql); //反回结果集
if (!rs.next()) rs=null;
else{
rs.last();
lastRow=rs.getRow();
pageCount=(lastRow%pageSize==0)?(lastRow/pageSize):(lastRow/pageSize+1);
int posion=(nowPage-1)*pageSize+1;
rs.absolute(posion);
}
}catch(SQLException ex) {
System.out.println("执行SQL语句出错:" + ex.getMessage());
throw ex;}
return rs;
}//返回分页栏,为了简化代码,调用分页栏方法时必须先调用exeQuery方法,这样才能保证pageCount,currentPage的准确性
public String getPageStatus(String jspFile) throws SQLException{
String jspPage=jspFile;
String status;
nextPage=nowPage+1;// 下一页
beforePage=nowPage-1;//上一页
status="每页显示<font color=#660066><b>"+pageSize+"</b></font>条数据,总共有<font color=red><b>"+lastRow+"</b></font>条数据,当前页码为<font color=blue><b>"+nowPage+"</b></font>/<font color=green><b>"+pageCount+"</b></font> ";
if (pageCount==1)
status=status+"[首页][上一页][下一页][尾页]";
else if (nowPage==1)
status=status+"[首页][上一页][<a href="+jspPage+"currentPage="+nextPage+">下一页</a>][<a href="+jspPage+"currentPage="+pageCount+">尾页</a>]";
else if(nowPage==pageCount)
status=status+"[<a href="+jspPage+"currentPage=1>首页</a>][<a href="+jspPage+"currentPage="+beforePage+">上一页</a>][下一页][尾页]";
else
status=status+"[<a href="+jspPage+"currentPage=1>首页</a>][<a href="+jspPage+"currentPage="+beforePage+">上一页</a>][<a href="+jspPage+"currentPage="+nextPage+">下一页</a>][<a href="+jspPage+"currentPage="+pageCount+">尾页</a>]";
//跳转选择
status=status+" 转到第<select size=\"1\" name=\"D1\" onChange=\"redirect(this.options[this.selectedIndex].value)\">";
for(int index_loop=1;index_loop<=pageCount;index_loop++){
status=status+"<option value=\""+index_loop+"\"";
if(index_loop==nowPage) status=status+" selected";
status=status+">"+index_loop+"</option>";
}
status=status+"</select>页";
status=status+"<script language=javascript>";
status=status+"function redirect(x){";
status=status+"location=\""+jspPage+"currentPage=\"+x;";
status=status+"}</script>";
//跳转结束
return status;
}
//精简的分页栏
public String getPageStatus1(String jspFile) throws SQLException{
String jspPage=jspFile;
String status;
nextPage=nowPage+1;// 下一页
beforePage=nowPage-1;//上一页
status="总共有<font color=red><b>"+lastRow+"</b></font>条数据,当前页码为<font color=blue><b>"+nowPage+"</b></font>/<font color=green><b>"+pageCount+"</b></font> ";
if (pageCount==1)
status=status+"[首页][上一页][下一页][尾页]";
else if (nowPage==1)
status=status+"[首页][上一页][<a href="+jspPage+"currentPage="+nextPage+">下一页</a>][<a href="+jspPage+"currentPage="+pageCount+">尾页</a>]";
else if(nowPage==pageCount)
status=status+"[<a href="+jspPage+"currentPage=1>首页</a>][<a href="+jspPage+"currentPage="+beforePage+">上一页</a>][下一页][尾页]";
else
status=status+"[<a href="+jspPage+"currentPage=1>首页</a>][<a href="+jspPage+"currentPage="+beforePage+">上一页</a>][<a href="+jspPage+"currentPage="+nextPage+">下一页</a>][<a href="+jspPage+"currentPage="+pageCount+">尾页</a>]";
return status;
}public void closeStmt(){
try{
stmt.close();
}catch(SQLException e){
e.printStackTrace();
}
}public void closeConn(){
try{
conn.close();
}catch(SQLException e){
e.printStackTrace();
}
}
}
可以在持续层考虑一下,
然后在表现层考虑一下,
也就差不多了。
呆鸟越来越懒了哦!
我认为分页现在有两种
1,在持久层就实现分页数据的取得,不过不是所有数据库都支持,oracle就支持。
2,在表现层把从持久层取得的所有数据(一般是个记录集)进行分页,网上好多都是这么做的。
package common;
import java.sql.*;
import javax.servlet.http.*;
/**
*
* <p>Title: 分页显示模块</p>
* <p>Description: 该模块是实现分页的功能</p>
* <p>Copyright: Copyright (c) 2004</p>
*/
public class Pagination {
private String strPage = null; //page参数变量
private int curPages; //page参数内部的值
private int m_rows; //设置每页显示的页数
private int pages; //总页数 //取得记录值
public String strPage(HttpServletRequest request, String page) {
try {
strPage = request.getParameter(page);
}
catch (Exception e) {
System.out.println("strPage" + e.getMessage());
}
return strPage;
} //页面数
public int curPages(String strPage) {
try {
if (strPage == null) {
curPages = 1;
}
else {
curPages = Integer.parseInt(strPage);
if (curPages < 1) {
curPages = 1;
}
}
}
catch (Exception e) {
System.out.print("curPages");
}
return curPages;
} //传递每页显示的记录数
public void setRows(int rows) {
m_rows = rows;
}
public int getRows() {
return m_rows;
}
public int getPages(int rowcounts) {
int test; //变量
test = rowcounts % m_rows; //取得余数
if (test == 0) {
pages = rowcounts / m_rows;
}
else {
pages = rowcounts / m_rows + 1;
}
return pages;
//页数
}
public ResultSet getPageSet(ResultSet rs, int curPages) {
if (curPages == 1) {
return rs;
}
else {
int i = 1;
try {
while (rs.next()) {
i = i + 1;
if (i > ( (curPages - 1) * m_rows)) {
break; //退出
}
}
return rs; //从退出开始将结果集返回,也就是退出后的rs
}
catch (Exception e) {
System.out.print(e.getMessage());
}
}
return rs;
} /**
//关闭指针
public void close(){
if(rs != null){
rs.close();
rs = null;
}
}
*/
}使用分页的例子
<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
<%@ page import="DCB.*"%>
<%@ page import="common.*"%>
<jsp:useBean id="Pagination" scope="session" class="common.Pagination" />
<jsp:setProperty name="Pagination" property="*" />
<html>
<head>
<meta http-equiv="Content-Language" content="zh-cn">
<meta name="GENERATOR" content="Microsoft FrontPage 5.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title></title>
<link rel=stylesheet href="../sstyle.css" type="text/css">
</head><body><table border="0" cellpadding="0" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111" width="100%" id="AutoNumber1">
<tr>
<td width="100%"> <table border="1" cellpadding="1" cellspacing="1" style="border-collapse: collapse" bordercolor="#111111" width="100%" id="AutoNumber2">
<tr height="20">
<td width="8%" align="center"><font size="2"><b>代码</b></font></td>
<td width="21%" align="center"><font size="2"><b>名称</b></font></td>
<td width="59%" align="center"><font size="2"><b>XXXXX</b></font></td>
</tr>
<%DCBquery D_JJDW=new DCBquery();
D_JJDW.setTable_name_sql("D_JJDW");
int curPages = Pagination.curPages(Pagination.strPage(request,"page"));
Pagination.setRows(10);//每页显示10条
int totalPages = Pagination.getPages(D_JJDW.sum());//取出总页数
if(D_JJDW.sum()>0){
ResultSet rs = Pagination.getPageSet(D_JJDW.rs_record(),curPages);
int i=1;//变量获得每页显示的条数
while(rs.next()){
%>
<tr align="center">
<td><%=rs.getString("DM")%></td>
<td><%=rs.getString("DWMC")%></td>
<td><%=rs.getString("BZ")==null?"":rs.getString("BZ")%></td>
</tr>
<%
i=i+1;
if(i>Pagination.getRows()) break;
}
rs.close();
%>
<tr align="center">
<td colspan="5">
<%if(curPages==1){out.print("首页 上一页");}
else{%>
<a href="D_JJDWList.jsp?page=1">首页</a> <a href="D_JJDWList.jsp?page=<%=curPages-1%>">上一页</a>
<%}%>
<%if(curPages==totalPages)
{
out.print("下一页 尾页");
}
else{%>
<a href="D_JJDWList.jsp?page=<%=curPages+1%>">下一页</a> <a href="D_JJDWList.jsp?page=<%=totalPages%>">尾页</a>
<%}%>
</td>
</tr>
<%
}
else{
%>
<tr align="center">
<td height="27" colspan="5">对不起,目前没有记录!</td>
</tr>
<%}%>
</table></td>
</tr>
</table>
</body></html>
[枉凝眉]一个是阆苑仙葩,一个是美玉无瑕.若说没奇缘,今生偏又遇着他,若说有奇缘,如何心事终虚化?一个枉自嗟呀,一个空劳牵挂.一个是水中月,一个是镜中花.想眼中能有多少泪珠儿,怎经得秋流到冬尽,春流到夏!
跟本没做到表示层和业务层分离
请大家参考sun公司的petstore的分页实现
再自己写一个!
我就是这样的
恕我直言!楼上的几位代码都不好。
跟本没做到表示层和业务层分离
请大家参考sun公司的petstore的分页实现
再自己写一个!
我就是这样的请问sun公司的petstore的分页实现
该上哪里去找??
请把你在jsp页面怎么使用的页贴出来吧