JSP分页

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  JSP分页

  //实体类郑州牛皮癣专科医院

  package entity;

  public class note {

  PRivate int id;

  private String title;

  private String author;

  private String content;

  public note(){}

  public note(String title,String author,String content)

  {

  this.title=title;

  this.author=author;

  this.content=content;

  }

  public note(int id,String title,String author,String content)

  {

  this.id=id;

  this.title=title;

  this.author=author;

  this.content=content;

  }

  public String getAuthor() {

  return author;

  }

  public void setAuthor(String author) {

  this.author = author;

  }

  public String getContent() {

  return content;

  }

  public void setContent(String content) {

  this.content = content;

  }

  public int getId() {郑州牛皮癣专科医院

  return id;

  }

  public void setId(int id) {

  this.id = id;

  }

  public String getTitle() {

  return title;

  }

  public void setTitle(String title) {

  this.title = title;

  }

  }

  //连接数据库的基类

  package dao;

  import java.sql.*;

  public abstract class BaseJdbcDao {

  private static final String DBDRIVER = "com.microsoft.sqlserver.jdbc.SQLServerDriver";

  private static final String DBURL = "jdbc:sqlserver://localhost:1433;DataBaseName=notetest";

  private static final String DBUSER="sa";

  private static final String DBPASS="sa";

  protected Connection conn=null;

  protected Statement stmt=null;郑州牛皮癣专科医院

  protected PreparedStatement pstmt=null;

  protected ResultSet rst=null;

  public Connection getConn()

  {

  try{

  Class.forName(DBDRIVER);

  conn=DriverManager.getConnection(DBURL,DBUSER,DBPASS);

  // System.out.println("连接成功");

  }catch(ClassNotFoundException e)

  {

  System.out.println("没有找到驱动");

  e.getMessage();

  }catch(SQLException e)

  {

  System.out.println("数据库联接失败");

  e.getMessage();

  }finally

  {

  return conn;

  }

  }

  public void CloseAll()

  {

  if(rst!=null)

  {

  try{

  rst.close();郑州最好的牛皮癣医院

  }catch(SQLException e)

  {

  e.toString();

  }

  }

  if(pstmt!=null)

  {

  try{

  pstmt.close();

  }catch(SQLException e)

  {

  e.toString();

  }

  }

  if(stmt!=null)

  {

  try{

  stmt.close();

  }catch(SQLException e)

  {

  e.toString();

  }

  }

  if(conn!=null)

  {

  try{

  conn.close();

  }catch(SQLException e)

  {

  e.toString();

  }

  }

  }

  }

  //业务类

  package dao;

  import java.sql.*;

  import java.util.*;

  import entity.note;

  public class noteDao extends BaseJdbcDao{

  int count=0;

  //得到所有记录数

  public int getNoteCount()

  {

  String sql1="select count(*) from note";

  int pageCount=0;

  conn=super.getConn();

  try{

  pstmt=conn.prepareStatement(sql1);

  rst=pstmt.executeQuery();

  rst.next();

  count=rst.getInt(1);

  }catch(SQLException e)

  {

  e.toString();

  }finally

  {

  super.CloseAll();

  }

  return count;

  }

  //分页显示

  public List ShowNotesByPage(int page,int pageSize)

  {

  List listnote=new ArrayList();

  note nn=null;

  int preCount = pageSize*(page-1);

  int pageCount=0;

  String sql="select top "+pageSize+" * from note where id not in (select top "+preCount+" id from note order by id desc) order by id desc";

  conn=super.getConn();

  try{郑州最好的牛皮癣医院

  if(count%pageSize==0){

  pageCount=count/pageSize;

  }

  else

  {

  pageCount=count/pageSize+1;

  }

  pstmt=conn.prepareStatement(sql);

  rst=pstmt.executeQuery();

  while(rst.next())

  {

  nn=new note();

  nn.setId(rst.getInt("id"));

  nn.setTitle(rst.getString("title"));

  nn.setAuthor(rst.getString("author"));

  nn.setContent(rst.getString("content"));

  listnote.add(nn);

  }

  }catch(SQLException e)

  {

  e.toString();

  }finally

  {

  super.CloseAll();

  }

  return listnote;

  }

  }

  //页面中的代码

  <%@ page language="java" import="java.util.*,entity.*,dao.*" pageEncoding="gbk"%>

  <%

  String path = request.getContextPath();

  String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

  %>

  

  

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