Paging package

Copyright: Attribution, allow others to create paper-based, and must distribute paper (based on the original license agreement with the same license Creative Commons )

1, a new project to BaseDao Case (JDBC encapsulation), encapsulation paging method.
2, the introduction of the database connection jar package.
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3, the package code basedao introduced.

4, write jsp code.
% Content% wherein such forms are prepared java code format in which jsp, c is introduced at the top jsp tag library.

jsp code as follows:

<%@page import="com.aaa.util.BaseDao"%>
<%@ page language="java" import="java.util.*"  pageEncoding="UTF-8"%>
<%@ 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>
    <base href="<%=basePath%>">
     
    <title>My JSP 'index.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">
     <!--
     <link rel="stylesheet" type="text/css" href="styles.css">
     -->
  </head>
   
  <body>
  <% String stuPageNo=request.getParameter("pageNo");
      int pageNo=0;
      if(stuPageNo==null){
      pageNo=1;
      }else{
      pageNo=Integer.valueOf(stuPageNo);
      }
      if(pageNo<1){
      pageNo=1;
      }
      int totalCount=0;
      List<Map<String,Object>> count=BaseDao.selectMap("select  count(*) as cou from student", null);
      if(count!=null&&count.size()>0){
      totalCount=Integer.valueOf(count.get(0).get("cou")+"");
      }
      int pageSize=5;
      int  maxPage=totalCount%pageSize==0?totalCount/pageSize:totalCount/pageSize+1;
      if(pageNo>maxPage){
      pageNo=maxPage;
      }
      List<Map<String,Object>> stuList=BaseDao.selectMap("select  id,name,address,sex from student limit  "+(pageNo-1)*pageSize+","+pageSize, null);
      request.setAttribute("stuList", stuList);
      request.setAttribute("pageNo", pageNo);
      request.setAttribute("totalCount", totalCount);
      request.setAttribute("maxPage", maxPage);
   %>
   <table border="1" width="400px">
   <tr align="center">
           <th>ID</th>
           <th>姓名</th>
           <th>地址</th>
           <th>性别</th>
   </tr>
   <c:forEach items="${stuList}" var="stu">
           <tr align="center">
                <td>${stu.id }</td>
                <td>${stu.name }</td>
                <td>${stu.address }</td>
                <td>${stu.sex }</td>
           </tr>
   </c:forEach>
   <tr>
           <td colspan="4">
           <a href="index.jsp?pageNo=1">首页</a> 
           <a href="index.jsp?pageNo=${pageNo-1 }">上一页</a> 
           <a href="index.jsp?pageNo=${pageNo+1 }">下一页</a> 
           <a href="index.jsp?pageNo=${maxPage }">尾页</a> 
           跳转到<select onchange="togo(this.value)">
           <c:forEach var="page" begin="1" end="${maxPage}">
           <c:choose>
           <c:when test="${page==pageNo}">
           <option selected="selected" value="${page }">${page  }</option>
           </c:when>
           <c:otherwise>
           <option value="${page }">${page }</option>
           </c:otherwise>
           </c:choose>
           </c:forEach>
           </select>页
           共${totalCount }条${maxPage}页
           </td>
   </tr>
   </table>
   <script type="text/javascript">
   function togo(v){
   location.href="index.jsp?pageNo="+v;
   }
   </script>
  </body>
</html>

5, start tomcat, enter localhost: 8080 / project name /index.jsp visit will be as follows paging query results.
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These are the most basic ideas, you can put the jsp java script to write a class encapsulate, and the pageNo sql statement as a request to save the parameters passed to the domain after the class inside, get all the property values, and finally forwarded to the index. jsp page.

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