// private Integer startPage;//首页
// private Integer endPage;//尾页
// private Integer goPage;//共几页
// private Integer totalNum;//总数条数
// private Integer pageSize = 5;//每页显示数据数
// private Integer currentNum = 0;//当前页数
// private PageHelper pageHelper;//页面辅助类
以上是属性对于首页尾页 当前页的判断 请给下代码一时之间卡住了脑子感觉晕乎
public String find() {
if（）{
}
}
// private Integer endPage;//尾页
// private Integer goPage;//共几页
// private Integer totalNum;//总数条数
// private Integer pageSize = 5;//每页显示数据数
// private Integer currentNum = 0;//当前页数
// private PageHelper pageHelper;//页面辅助类
以上是属性对于首页尾页 当前页的判断 请给下代码一时之间卡住了脑子感觉晕乎
public String find() {
if（）{
}
}
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<script language="javaScript">
<!--
function Jumping()
{
document.PageForm.submit();
}function gotoPage(pagenum)
{
document.PageForm.jumpPage.value=pagenum;
document.PageForm.submit();
}//-->
</script>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here </title>
</head>
<body>
每页 <%=pageCtl.getRowsPerPage()%>行
共 <%=pageCtl.getMaxRowCount()%>行
第 <%=pageCtl.getCurPage()%>页
共 <%=pageCtl.getMaxPage()%>页
<br> <%if(pageCtl.getCurPage()==1){out.print("首页 上一页");} else{ %>
<A href="javascript:gotoPage(1)">首页 </A>
<A href="javascript:gotoPage( <%=pageCtl.getCurPage()-1%>)">上一页 </A>
<%} %>
<%if(pageCtl.getCurPage()==pageCtl.getMaxPage()){out.print("下一页 尾页");} else{ %>
<A href="javascript:gotoPage( <%=pageCtl.getCurPage()+1%>)">下一页 </A>
<A href="javascript:gotoPage( <%=pageCtl.getMaxPage()%>)">尾页 </A>
<%} %> 转到第 <select name="jumpPage" onchange="Jumping()">
<%
for(int i=1;i <=pageCtl.getMaxPage();i++)
{
if(i==pageCtl.getCurPage()){
%>
<option selected value= <%=i%>> <%=i%> </option>
<%}else{ %>
<option value= <%=i%>> <%=i%> </option>
<% }
}
%>
</select>页</body>
</html>分页主页面
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<jsp:useBean id="pageCtl" class="page.PageBean" scope="request"> </jsp:useBean>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><%@page import="java.util.Vector"%>
<%@page import="java.util.Enumeration"%> <html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here </title>
</head>
<body>
<table border=1>
<%
java.util.Vector v=pageCtl.getResult();
java.util.Enumeration e = v.elements();
while(e.hasMoreElements())
{
Object[] obj = (Object[])e.nextElement();
%>
<tr>
<td align="center" width="50%"> <%=obj[0]%> </td>
<td align="center" width="50%"> <%=obj[1]%> </td>
</tr>
<%} %>
</table><%if(pageCtl.getMaxPage()!=1){ %><form id="PageForm" name="PageForm" action="/LMSTEST/ContactServlet" method="get">
<%@ include file="/pageman.jsp" %> </form>
<%} %>
</body>
</html>分页程序ＣontactServlet.java
import java.io.IOException;
import java.io.PrintWriter;import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import page.ContactBean;
import page.PageBean;/**
* Servlet implementation class ContactServlet
*/
public class ContactServlet extends HttpServlet {
private static final long serialVersionUID = 1L; /**
* Default constructor.
*/
public ContactServlet() {
// TODO Auto-generated constructor stub
}/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
request.setCharacterEncoding("utf-8");
response.setContentType("text/html");
response.setCharacterEncoding("utf-8");
PrintWriter out = response.getWriter();
try {
ContactBean contact = new ContactBean();
PageBean pageCtl = contact.listData((String) request
.getParameter("jumpPage"));
System.out.print(pageCtl.getMaxPage());
request.setAttribute("pageCtl", pageCtl);
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
RequestDispatcher dis = request.getRequestDispatcher("/contact.jsp");
dis.forward(request, response);
}/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}}ContactBean.java
package page;import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Vector;import com.neusoft.njpro.Test;public class ContactBean {
private Connection conn;
Vector v;
/**
* 创建数据库一个连接
* 初始化一个vector
*/
public ContactBean()
{
Test test = new Test();
conn = test.getCon();
v = new Vector();
}/**
* @return 要查询的记录数
* @throws SQLException
*/
public int getAvailableCount() throws SQLException
{
int ret = 0;
Statement stmt = conn.createStatement();
ResultSet rset = stmt.executeQuery("select count(*) from procedure_test");
while(rset.next())
{
ret = rset.getInt(1);
}return ret;
}/**
* @param page获取指定页面的数据，并且封装在PageBean中返回
* @return
* @throws Exception
*/
public PageBean listData(String page) throws Exception
{
try {
PageBean pageBean = new PageBean(this);
int pageNum = Integer.parseInt(page);
Statement stmt = conn.createStatement();
String strSql = "select * from (select rownumber() over(order by log_time) as rn,procedure_test.* from procedure_test) as t where t.rn between "
+ (pageNum * pageBean.rowsPerPage-pageBean.rowsPerPage+1)
+ " and "+ pageNum * pageBean.rowsPerPage;
ResultSet rset = stmt.executeQuery(strSql);while (rset.next()) {Object[] obj = new Object[2];
obj[0] = rset.getString(3);
obj[1] = rset.getObject(4);
v.add(obj);}
rset.close();
stmt.close();
pageBean.curPage = pageNum;
pageBean.data = v;
return pageBean;
} catch (Exception e) {
e.printStackTrace();
throw e;
// TODO: handle exception
}
}public Vector getResult()
{
return v;
}}PageBean.java
package page;import java.sql.SQLException;
import java.util.Vector;public class PageBean {
public int getCurPage() {
return curPage;
}public void setCurPage(int curPage) {
this.curPage = curPage;
}public int getMaxPage() {
return maxPage;
}public void setMaxPage(int maxPage) {
this.maxPage = maxPage;
}public int getMaxRowCount() {
return maxRowCount;
}public void setMaxRowCount(int maxRowCount) {
this.maxRowCount = maxRowCount;
}public int getRowsPerPage() {
return rowsPerPage;
}public void setRowsPerPage(int rowsPerPage) {
this.rowsPerPage = rowsPerPage;
}public java.util.Vector getData() {
return data;
}public void setData(java.util.Vector data) {
this.data = data;
}public int curPage; //当前是第几页
public int maxPage; //一共多少页
public int maxRowCount; //一共是多少行
public int rowsPerPage = 5; //每页多少行
public java.util.Vector data; //本页中的资料public PageBean()
{}public void countMaxPage() //根据总行数计算总页数
{
if(this.maxRowCount%this.rowsPerPage==0)
{
this.maxPage = this.maxRowCount/this.rowsPerPage;
}
else
{
this.maxPage = this.maxRowCount/this.rowsPerPage+1;
}
}public Vector getResult()
{
return this.data;
}public PageBean(ContactBean contact) throws SQLException
{
this.maxRowCount = contact.getAvailableCount(); //得到总行数
this.data = contact.getResult(); //得到要显示于本页的资料
this.countMaxPage();
}
}