在JSP中实现分页显示(假分页)
2014-09-18 16:20
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使用MySQL数据库，用户名root，密码为空，新建数据库名为lin_0917，新建表名为person，表中字段为：ID，NAME，PASSWORD。示例为每页显示15条记录JSP代码如下：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%@ page import="java.sql.*"%><html> <head>
<title>My JSP 'Jdbc2.jsp' starting page</title>
</head>
<body> <center> <h1> 人员列表 </h1> <hr /> <br /> <%!final String jspurl = "Jdbc2.jsp";%> <% int linesize = 15; int currentpage = 1; int alldata = 100; int pagesize = 0; pagesize = (alldata + linesize - 1) / linesize; %> 总页数为 <%=pagesize%>页 <% try {
currentpage = Integer.parseInt(request.getParameter("cp")); } catch (Exception e) { } %> <% String driverName = "com.mysql.jdbc.Driver"; String userName = "root"; String userPasswd = ""; String dbName = "lin_0917"; String tableName = "person"; String url = "jdbc:mysql://localhost/" + dbName + "?user=" + userName + "&password=" + userPasswd; %> <% try { Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection connection = DriverManager.getConnection(url);
Statement statement = connection.createStatement();
String sql2 = "select count(ID) from person";
ResultSet rs2 = statement.executeQuery(sql2);
if (rs2.next()) { alldata = rs2.getInt(1); } rs2.close(); String sql = "select ID,NAME,PASSWORD from person"; ResultSet rs = statement.executeQuery(sql); ResultSetMetaData rmeta = rs.getMetaData(); %> 数据库中记录总数为：<%=alldata%> 当前页： <%=currentpage%>/<%=pagesize%> <script type="text/javascript"> function openpage(curpage) { document.form1.cp.value = curpage; document.form1.submit(); } function jumpto(){ document.form1.cp.value = document.form1.jump.value; document.form1.submit(); } </script> <form action="<%=jspurl%>" name="form1"> <input type="button" value="上一页" onclick="openpage(<%=currentpage - 1%>)" <%=currentpage == 1 ? "disabled" : ""%>> <input type="button" value="首页 " onclick="openpage(1)" <%=currentpage == 1 ? "disabled" : ""%>> <input type="button" value="尾页" onclick="openpage(<%=pagesize%>)" <%=currentpage == pagesize ? "disabled" : ""%>> <input type="button" value="下一页" onclick="openpage(<%=currentpage + 1%>)" <%=currentpage == pagesize ? "disabled" : ""%>> <input type="hidden" name="cp" value=""> 跳到第 <select name="jump" onchange="jumpto()"> <% for (int i = 1; i <= pagesize; i++) { %> <option value="<%=i%>" <%=currentpage == i ? "selected" : ""%>><%=i%></option> <% } %>
</select> 页 </form>
<table border="1" width="80%">
<tr>
<td> 编号 </td> <td> 登录名称 </td> <td> 密码 </td> <td colspan="2"> 操作 </td>
</tr>
<% int i = 0; for (int x = 0; x < (currentpage - 1) * linesize; x++) { rs.next(); } for (int x = 0; x < linesize; x++) {
if (rs.next()) { i++; int id = rs.getInt(1); String name = rs.getString(2); String password = rs.getString(3); %> <tr>
<td> <%=id%> </td> <td> <%=name%> </td> <td> <%=password%> </td> <td> 更新 </td> <td> 删除 </td> </tr> <% } } rs.close();
statement.close();
connection.close(); if (i == 0) { %> <tr>
<td colspan="5"> 数据库中没有数据 </td>
</tr> <% } %>
</table>
<% } catch (Exception e) { %> <h2> 系统出错！！！ </h2> <% } %> </center> </body></html>
效果：效果：
效果：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%@ page import="java.sql.*"%><html> <head>
<title>My JSP 'Jdbc2.jsp' starting page</title>
</head>
<body> <center> <h1> 人员列表 </h1> <hr /> <br /> <%!final String jspurl = "Jdbc2.jsp";%> <% int linesize = 15; int currentpage = 1; int alldata = 100; int pagesize = 0; pagesize = (alldata + linesize - 1) / linesize; %> 总页数为 <%=pagesize%>页 <% try {
currentpage = Integer.parseInt(request.getParameter("cp")); } catch (Exception e) { } %> <% String driverName = "com.mysql.jdbc.Driver"; String userName = "root"; String userPasswd = ""; String dbName = "lin_0917"; String tableName = "person"; String url = "jdbc:mysql://localhost/" + dbName + "?user=" + userName + "&password=" + userPasswd; %> <% try { Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection connection = DriverManager.getConnection(url);
Statement statement = connection.createStatement();
String sql2 = "select count(ID) from person";
ResultSet rs2 = statement.executeQuery(sql2);
if (rs2.next()) { alldata = rs2.getInt(1); } rs2.close(); String sql = "select ID,NAME,PASSWORD from person"; ResultSet rs = statement.executeQuery(sql); ResultSetMetaData rmeta = rs.getMetaData(); %> 数据库中记录总数为：<%=alldata%> 当前页： <%=currentpage%>/<%=pagesize%> <script type="text/javascript"> function openpage(curpage) { document.form1.cp.value = curpage; document.form1.submit(); } function jumpto(){ document.form1.cp.value = document.form1.jump.value; document.form1.submit(); } </script> <form action="<%=jspurl%>" name="form1"> <input type="button" value="上一页" onclick="openpage(<%=currentpage - 1%>)" <%=currentpage == 1 ? "disabled" : ""%>> <input type="button" value="首页 " onclick="openpage(1)" <%=currentpage == 1 ? "disabled" : ""%>> <input type="button" value="尾页" onclick="openpage(<%=pagesize%>)" <%=currentpage == pagesize ? "disabled" : ""%>> <input type="button" value="下一页" onclick="openpage(<%=currentpage + 1%>)" <%=currentpage == pagesize ? "disabled" : ""%>> <input type="hidden" name="cp" value=""> 跳到第 <select name="jump" onchange="jumpto()"> <% for (int i = 1; i <= pagesize; i++) { %> <option value="<%=i%>" <%=currentpage == i ? "selected" : ""%>><%=i%></option> <% } %>
</select> 页 </form>
<table border="1" width="80%">
<tr>
<td> 编号 </td> <td> 登录名称 </td> <td> 密码 </td> <td colspan="2"> 操作 </td>
</tr>
<% int i = 0; for (int x = 0; x < (currentpage - 1) * linesize; x++) { rs.next(); } for (int x = 0; x < linesize; x++) {
if (rs.next()) { i++; int id = rs.getInt(1); String name = rs.getString(2); String password = rs.getString(3); %> <tr>
<td> <%=id%> </td> <td> <%=name%> </td> <td> <%=password%> </td> <td> 更新 </td> <td> 删除 </td> </tr> <% } } rs.close();
statement.close();
connection.close(); if (i == 0) { %> <tr>
<td colspan="5"> 数据库中没有数据 </td>
</tr> <% } %>
</table>
<% } catch (Exception e) { %> <h2> 系统出错！！！ </h2> <% } %> </center> </body></html>
效果：效果：
效果：
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