jsp+servlet+javabean實(shí)現(xiàn)數(shù)據(jù)分頁(yè)方法完整實(shí)例

?xml version="1.0" encoding="utf-8"?>
!DOCTYPE postgres[
 !ELEMENT postgres (driver,url,username,pwd)>
 !ELEMENT driver (#PCDATA)>
 !ELEMENT url (#PCDATA)>
 !ELEMENT username (#PCDATA)>
 !ELEMENT pwd (#PCDATA)>
]>
postgres>
 driver>org.postgresql.Driver/driver>
 url>jdbc:postgresql://localhost:5432/java/url>
 username>admin/username>
 pwd>k42jc/pwd>
/postgres>

package util;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
/** 
 * 用于解析xml屬性文件 
 * @author JohsonMuler 
 * 
 */
public class DOM4JUtil {
 private static Element root=null;
 static{//靜態(tài)代碼塊
  //創(chuàng)建解析對(duì)象
  SAXReader sr=new SAXReader();
  //獲取當(dāng)前工程路徑
//  String url=System.getProperty("user.dir");
  String url=DOM4JUtil.class.getResource("").getPath();
//  System.out.println(url);
  try {
   //通過(guò)文件路徑獲取配置文件信息
   Document doc=sr.read(url+"config.xml");
   //獲取根節(jié)點(diǎn)
   root=doc.getRootElement();
  } catch (DocumentException e) {
   e.printStackTrace();
  }
 }
 public static String getPostgresData(String str){
  //以根節(jié)點(diǎn)為基礎(chǔ)，獲取配置文件數(shù)據(jù)
  Element e=root.element(str);
  String data=e.getText();
  return data;
 }
 public static void main(String[] args) {
//  String url=DOM4JUtil.class.getResource("..").getPath();
//  System.out.println(System.getProperty("user.dir"));
//  System.out.println(url);
  String driver=getPostgresData("driver");
  String url=getPostgresData("url");
  System.out.println(driver);
  System.out.println(url);
 }
}

package util;
import java.sql.PreparedStatement;
import java.sql.Statement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
public class PostgreSQL_Util {
 private static DOM4JUtil dom=new DOM4JUtil();
 private static Connection c=null;
 private static ResultSet rs=null;
 private static String driver=dom.getPostgresData("driver");
 private static String url=dom.getPostgresData("url");
 private static String username=dom.getPostgresData("username");
 private static String pwd=dom.getPostgresData("pwd");
 public PostgreSQL_Util(){
  try {
   Class.forName(driver);
   c=DriverManager.getConnection(url);
  } catch (ClassNotFoundException e) {
   System.out.println("未找到指定類(lèi)："+e.getMessage());
  } catch (SQLException e) {
   System.out.println("獲取連接異常："+e.getMessage());
  }
 }
 /**
  * 數(shù)據(jù)查詢(xún)方法(Statement)
  * @param sql
  * @return
  * @throws SQLException
  */
 public ResultSet executeQuery(String sql) throws SQLException{
  Statement s=c.createStatement();
  rs=s.executeQuery(sql);
  return rs;
 }
 /**
  * 重載方法(PreparedStatement)
  * @param sql
  * @param list
  * @return
  * @throws SQLException
  */
 public ResultSet executeQuery(String sql,ListObject> list) throws SQLException{
  PreparedStatement ps=c.prepareStatement(sql);
  for(int i=0;ilist.size();i++){
   System.out.println(list.get(i));
   System.out.println(i+1);
   ps.setObject(i+1, list.get(i));
  }
  rs=ps.executeQuery();
  c.close();
  return rs;
 }
 /**
  * 數(shù)據(jù)更新方法(添加，刪除，更改)(Statement)
  * @param sql
  * @throws SQLException
  */
 public int executeUpdate(String sql) throws SQLException{
  Statement s=c.createStatement();
  int i=s.executeUpdate(sql);
  c.close();
  return i;
 }
 /**
  * 重載方法(PreparedStatement)
  * @param sql
  * @param list
  * @throws SQLException
  */
 public int executeUpdate(String sql,ListObject> list) throws SQLException{
  PreparedStatement ps=c.prepareStatement(sql);
  for(int i=0;ilist.size();i++){
   ps.setObject(i+1, list.get(i));
  }
  int i=ps.executeUpdate();
  c.close();
  return i;
 }
 /**
  * 單獨(dú)的獲取連接
  * @return
  * @throws ClassNotFoundException
  * @throws SQLException
  */
 public static Connection getConnection() throws ClassNotFoundException, SQLException{
  Class.forName(driver);
  c=DriverManager.getConnection(url);
  return c;
 }
}

package bean;
import java.sql.ResultSet;
public class PageProperties {
 private int currentPage;//當(dāng)前頁(yè)號(hào)
 private int totalPages;//總頁(yè)數(shù)
 private int totalRecords;//總數(shù)據(jù)條數(shù)
 private ResultSet rs;//動(dòng)態(tài)結(jié)果集
 public PageProperties() {
  super();
 }
 public PageProperties(int currentPage, int totalPages, int totalRecords, 
   ResultSet rs) {
  super();
  this.currentPage = currentPage;
  this.totalPages = totalPages;
  this.totalRecords = totalRecords;
  this.rs = rs;
 }
 public int getCurrentPage() {
  return currentPage;
 }
 public void setCurrentPage(int currentPage) {
  this.currentPage = currentPage;
 }
 public int getTotalPages() {
  return totalPages;
 }
 public void setTotalPages(int totalPages) {
  this.totalPages = totalPages;
 }
 public int getTotalRecords() {
  return totalRecords;
 }
 public void setTotalRecords(int totalRecords) {
  this.totalRecords = totalRecords;
 }
 public ResultSet getRs() {
  return rs;
 }
 public void setRs(ResultSet rs) {
  this.rs = rs;
 }
}

package bean;
import java.sql.ResultSet;
public class PageProperties {
 private int currentPage;//當(dāng)前頁(yè)號(hào)
 private int totalPages;//總頁(yè)數(shù)
 private int totalRecords;//總數(shù)據(jù)條數(shù)
 private ResultSet rs;//動(dòng)態(tài)結(jié)果集
 public PageProperties() {
  super();
 }
 public PageProperties(int currentPage, int totalPages, int totalRecords, 
   ResultSet rs) {
  super();
  this.currentPage = currentPage;
  this.totalPages = totalPages;
  this.totalRecords = totalRecords;
  this.rs = rs;
 } 
 public int getCurrentPage() {
  return currentPage;
 }
 public void setCurrentPage(int currentPage) {
  this.currentPage = currentPage;
 }
 public int getTotalPages() {
  return totalPages;
 }
 public void setTotalPages(int totalPages) {
  this.totalPages = totalPages;
 }
 public int getTotalRecords() {
  return totalRecords;
 }
 public void setTotalRecords(int totalRecords) {
  this.totalRecords = totalRecords;
 }
 public ResultSet getRs() {
  return rs;
 }
 public void setRs(ResultSet rs) {
  this.rs = rs;
 }
}

package servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.ResultSet;
import java.sql.SQLException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import util.PostgreSQL_Util;
import bean.PageProperties;
import bean.TablePage;
public class Page extends HttpServlet {
 public void service(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {
  request.setCharacterEncoding("utf-8");
  response.setContentType("text/html;charset=utf-8");
  PrintWriter out = response.getWriter();
  /**
   * 通過(guò)TablePage設(shè)置分頁(yè)屬性
   *
   */
  TablePage tb=new TablePage();
  //獲取當(dāng)前表格顯示的頁(yè)碼
  int currentPage=tb.currentPage(tb.getStrPage(request, "page"));
  System.out.println(currentPage);
  //設(shè)置每頁(yè)顯示數(shù)據(jù)條數(shù)
  tb.setPageRecord(10);//設(shè)置每頁(yè)顯示10條數(shù)據(jù)
  /**
   * 通過(guò)xxSQL_Util設(shè)置JDBC連接及數(shù)據(jù)處理
   */
  PostgreSQL_Util postgres=new PostgreSQL_Util();
  try {
   ResultSet rs_count=postgres.executeQuery("select count(*) as c from student");
   rs_count.next();
   //獲得總的數(shù)據(jù)條數(shù)
   int totalRecords=rs_count.getInt("c");
   //根據(jù)數(shù)據(jù)表的總數(shù)據(jù)條數(shù)獲取頁(yè)面顯示表格的總頁(yè)數(shù)
   int totalPages=tb.getTotalPages(totalRecords);
   if(currentPage>totalPages){
    currentPage=totalPages;//保證最后一頁(yè)不超出范圍
   }
   //根據(jù)數(shù)據(jù)庫(kù)表信息和當(dāng)前頁(yè)面信息獲得動(dòng)態(tài)結(jié)果集
   ResultSet rs=tb.getPageResultSet(postgres.executeQuery("select * from student"), currentPage);
   /** 
    * 將數(shù)據(jù)加入javaBean
    */
   PageProperties pp=new PageProperties(currentPage, totalPages, totalRecords, rs);
   /** 
    * 將javaBean轉(zhuǎn)發(fā)至前端 
    */ 
   request.setAttribute("result", pp);
   request.getRequestDispatcher("tablePage.jsp").forward(request, response);
  } catch (SQLException e) {
   System.out.println("Class Page:"+e.getMessage());
//   e.printStackTrace();
  }
 }
}

%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
%@page import="java.sql.ResultSet"%>
%@page import="bean.PageProperties"%>
%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
html>
 head>
 title>簡(jiǎn)單數(shù)據(jù)分頁(yè)/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>
  tr>
   td>姓名/td>
   td>性別/td>
   td>年齡/td>
   td>分?jǐn)?shù)/td>
  /tr>
  %
   PageProperties pp=(PageProperties)request.getAttribute("result"); 
   ResultSet rs=pp.getRs();
  %>
  %
   int i=1;
   while(rs.next()){
   %>
  tr>
   td>%=rs.getObject(1) %>/td>
   td>%=rs.getObject(2) %>/td>
   td>%=rs.getObject(3) %>/td>
   td>%=rs.getObject(4) %>/td>
  /tr>
  %
   i++;
   if(i>10)
    break;
  }
   %>
   br/>
   span>%=pp.getTotalPages() %>頁(yè)/span>
  span>共%=pp.getTotalRecords() %>條數(shù)據(jù)/span>
  span>本頁(yè)%=i-1 %>條/span>
  span>第%=pp.getCurrentPage() %>頁(yè)/span>
  p align="center">
   %
    if ( pp.getCurrentPage() > 1 )
    {
   %>a href="%=path %>/page?page=%=pp.getCurrentPage() - 1%>">上一頁(yè)/a>
   %
    }
   %>
   %
    if ( pp.getCurrentPage()  pp.getTotalPages() )
    {
   %>a href="%=path %>/page?page=%=pp.getCurrentPage() + 1%>">下一頁(yè)>>/a>
   %
    }
   %>
   input type="text" name="input_text" id="input_text" size="1" /> 
   input type="button" name="skip" id="skip" value="跳轉(zhuǎn)" onclick="skip();"/>
   script>
    function skip(){
     var v=document.getElementById("input_text").value;
     location.href="page?page="+v;
    }
   /script>
  /p>
 /table>
 /body>
/html>