分页源代码

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package com.hbsi.web;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.hbsi.domain.StudentBean;
import com.hbsi.service.StudentServiceImpl;

public class ControllServlet extends HttpServlet {

/**
* Constructor of the object.
*/
public ControllServlet() {
super();
}

/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}

/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

//  response.setContentType("text/html");
//  PrintWriter out = response.getWriter();
//  out
//    .println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
//  out.println("<HTML>");
//  out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
//  out.println(" <BODY>");
//  out.print("    This is ");
//  out.print(this.getClass());
//  out.println(", using the GET method");
//  out.println(" </BODY>");
//  out.println("</HTML>");
//  out.flush();
//  out.close();
  doPost(request,response);
}

/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {

  StudentServiceImpl service=new StudentServiceImpl();
  //List<StudentBean> list=service.findAll();
  //先要计算一下一共有多少页

  int total=service.getSize();//一共有多少行记录


  int pageSize=3;//每页显示的记录行数

  int totalPages=total/pageSize;
  totalPages=(total%pageSize==0)?totalPages:totalPages+1;//总共有totalPages页
  //初始化当前页数
  int currentPage=1;
  if(request.getParameter("pageNo")!=null){
   currentPage=Integer.parseInt(request.getParameter("pageNo"));
  }
  if(currentPage<1){
   currentPage=1;
  }
  if(currentPage>totalPages){
   currentPage=totalPages;
  }
  List<StudentBean> list=service.listPage(currentPage, pageSize);



  request.setAttribute("list",list);
  //请求的转向---list.jsp把list中的数据显示给用户
  RequestDispatcher rd=request.getRequestDispatcher("/list.jsp?pageNo="+currentPage);
  rd.forward(request, response);
}

/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}

}

<%@ page language="java" import="java.util.*,com.hbsi.domain.*" pageEncoding="utf-8"%>
<%
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>
    <base href="<%=basePath%>">

    <title>My JSP 'list.jsp' starting page</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">

</head>

<body>
<%
List<StudentBean> list=(List<StudentBean>)request.getAttribute("list");
int pageNo=Integer.parseInt(request.getParameter("pageNo"));
%>
<h3>学生信息表</h3>
<table>
<%
for(int i=0;i<list.size();i++){
%>
<tr>
<td><%=list.get(i).getId() %></td>
<td><%=list.get(i).getName() %></td>
<td><%=list.get(i).getAge() %></td>
<td><%=list.get(i).getAddress() %></td>
</tr>
<%
}
%>
</table><br/>
<a href="listStudent?pageNo=1">第一页</a> <a href="listStudent?paeNo=<%=pageNo-1 %>">上一页</a> <a href="listStudent?pageNo=<%=pageNo+1 %>">下一页</a> <a href="">最后页</a>

</body>
</html>