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select_for_age.jsp
?
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="java.sql.*"%>
<%
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>按年龄查询</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 background="pic/background.jpg">
????<%
????request.setCharacterEncoding("UTF-8");
????String age = request.getParameter("age");
????Connection conn = null;
????Statement stat = null;
????ResultSet rs = null;
??? Class.forName("com.mysql.jdbc.Driver");
????String url = "jdbc:mysql://localhost:3306/jsp";
????String user = "root";
????String password = "root";
????conn = DriverManager.getConnection(url,user,password);
????stat = conn.createStatement();
????rs = stat.executeQuery("select * from student where age=" + age + "");
????%>
????<br>
????????<h3>符合条件的学生信息</h3><hr>
????<br>
?????<table width="450" border="100" cellSpacing=1 style="font-size:15pt;border:dashed 1pt">
????<tr>
????<td>学号</td>
????<td>姓名</td>
????<td>年龄</td>
????<td>性别</td>
????<td>专业</td>
????</tr>
????<%
????while(rs.next())
????{
????out.print("<tr>");
????out.print("<td>" + rs.getInt("id") + "</td>");
????out.print("<td>" + rs.getString("name") + "</td>");
????out.print("<td>" + rs.getInt("age") + "</td>");
????out.print("<td>" + rs.getString("gender") + "</td>");
????out.print("<td>" + rs.getString("major") + "</td>");
????????%>
????<td><a href="delete.jsp?id=<%=rs.getInt("id") %>">删除</a></td>
?????<td><a href="update.jsp?id=<%=rs.getInt("id") %>">修改</a></td>
????<%
????out.print("</tr>");
????}
??
??
????%>
??????</table>
??????<br>
??????<br>
??????<h4><a href=showInfo.jsp>返回查询页面</a></h4>
???????<%
????if(rs != null)
????{
????????rs.close();
????????rs = null;
????}
????????if(stat != null)
????{
????????stat.close();
????????stat = null;
????}
????????if(conn != null)
????{
????????conn.close();
????????conn = null;
????}
????%>
??</body>
</html>
?
?
?
?
?
select_for_gender
?
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="java.sql.*"%>
<%
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>按性别查询</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 background="pic/background.jpg">
?????<%
????request.setCharacterEncoding("UTF-8");
????String gender = request.getParameter("gender");
????Connection conn = null;
????Statement stat = null;
????ResultSet rs = null;
????Class.forName("com.mysql.jdbc.Driver");
????String url = "jdbc:mysql://localhost:3306/jsp";
????String user = "root";
????String password = "root";
????conn = DriverManager.getConnection(url,user,password);
????stat = conn.createStatement();
????rs = stat.executeQuery("select * from student where gender='" + gender + "'");
????%>
????<br>
????????<h3>符合条件的学生信息</h3><hr>
????<br>
?????<table width="450" border="100" cellSpacing=1 style="font-size:15pt;border:dashed 1pt">
????<tr>
????<td>学号</td>
????<td>姓名</td>
????<td>年龄</td>
????<td>性别</td>
????<td>专业</td>
????</tr>
????<%
????while(rs.next())
????{
????out.print("<tr>");
????out.print("<td>" + rs.getInt("id") + "</td>");
????out.print("<td>" + rs.getString("name") + "</td>");
????out.print("<td>" + rs.getInt("age") + "</td>");
????out.print("<td>" + rs.getString("gender") + "</td>");
????out.print("<td>" + rs.getString("major") + "</td>");
????????%>
????<td><a href="delete.jsp?id=<%=rs.getInt("id") %>">删除</a></td>
?????<td><a href="update.jsp?id=<%=rs.getInt("id") %>">修改</a></td>
????<%
????out.print("</tr>");
????}
????%>
??????</table>
??????<br>
??????<br>
??????<h4><a href=showInfo.jsp>返回查询页面</a></h4>
???????<%
????if(rs != null)
????{
????????rs.close();
????????rs = null;
????}
????????if(stat != null)
????{
????????stat.close();
????????stat = null;
????}
????????if(conn != null)
????{
????????conn.close();
????????conn = null;
????}
????%>
??</body>
</html>
?
?
select_for_id.jsp
?
?
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="java.sql.*"%>
<%
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>按学号条件查询</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 background="pic/background.jpg">
????<%
????request.setCharacterEncoding("UTF-8");
????String id = request.getParameter("id");
????Connection conn = null;
????Statement stat = null;
????ResultSet rs = null;
????Class.forName("com.mysql.jdbc.Driver");
????String url = "jdbc:mysql://localhost:3306/jsp";
????String user = "root";
????String password = "root";
????conn = DriverManager.getConnection(url,user,password);
????stat = conn.createStatement();
????rs = stat.executeQuery("select * from student where id=" + id + "");
????%>
????<br>
????????<h3>符合条件的学生信息</h3><hr>
????<br>
?????<table width="450" border="100" cellSpacing=1 style="font-size:15pt;border:dashed 1pt">
????<tr>
????<td>学号</td>
????<td>姓名</td>
????<td>年龄</td>
????<td>性别</td>
????<td>专业</td>
????</tr>
????<%
????if(rs.next())
????{
????out.print("<tr>");
????out.print("<td>" + rs.getInt("id") + "</td>");
????out.print("<td>" + rs.getString("name") + "</td>");
????out.print("<td>" + rs.getInt("age") + "</td>");
????out.print("<td>" + rs.getString("gender") + "</td>");
????out.print("<td>" + rs.getString("major") + "</td>");
????????%>
????<td><a href="delete.jsp?id=<%=rs.getInt("id") %>">删除</a></td>
?????<td><a href="update.jsp?id=<%=rs.getInt("id") %>">修改</a></td>
????<%
????out.print("</tr>");
????}
????else{
????out.print("<h4>不存在此条件的信息！</h4>");
????}
??
????%>
??????</table>
??????<br>
??????<br>
???????<h4><a href=showInfo.jsp>返回查询页面</a></h4>
??????<%
????if(rs != null)
????{
????????rs.close();
????????rs = null;
????}
????????if(stat != null)
????{
????????stat.close();
????????stat = null;
????}
????????if(conn != null)
????{
????????conn.close();
????????conn = null;
????}
????%>
????
??</body>
</html>
?
?
select_for_major.jsp
?
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="java.sql.*"%>
<%
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>按专业查询</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 background="pic/background.jpg">
?????<%
????request.setCharacterEncoding("UTF-8");
???// String id=request.getParameter("id");
??// String name=request.getParameter("name");
???// String age=request.getParameter("age");
???// String gender=request.getParameter("gender");
????String major=request.getParameter("major");
????//major=;
????
????
????Connection conn = null;
????Statement stat = null;
????ResultSet rs = null;
????Class.forName("com.mysql.jdbc.Driver");
????String url = "jdbc:mysql://localhost:3306/jsp";
