显示所有学生代码
<%@ page language="java" contentType="text/html; charset=UTF-8" import="java.sql.*"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>显示所有学生的页面</title>
</head>
<body>
<center>
<% String driverName = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
//加载JDBC驱动
String dbURL = "jdbc:sqlserver://localhost:1433; DatabaseName=zero";
//连接服务器和数据库
String userName = "sa"; // 默认用户名
String userPwd = "123456"; // 密码
Connection dbConn = null;
try {
Class.forName(driverName);
dbConn = DriverManager.getConnection(dbURL, userName, userPwd);
// System.out.println("Connection Successful!");
// 如果连接成功 控制台输出Connection Successful!
} catch (Exception e) {
e.printStackTrace();
// System.out.println("连接失败");
}
String sql="select * from stu_info"; //查询关键代码
PreparedStatement pstmt=dbConn.prepareStatement(sql,ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
ResultSet rs=pstmt.executeQuery();
rs.last(); //移至最后一条记录
%>你要查询的学生数据表中共有
<font size="5" color="red"><%=rs.getRow()%></font>人
<table border="2" bgcolor="ccceee" width="650">
<tr bgcolor="CCCCCC" align="center">
<td>记录条数</td><td>学号</td><td>姓名</td>
<td>性别</td><td>年龄</td><td>体重</td><td>身高</td>
</tr>
<% rs.beforeFirst(); //移至第一条记录之前
while (rs.next()){
%> <tr align="center">
<td><%=rs.getRow() %></td>
<td><%=rs.getString("id") %></td>
<td><%=rs.getString("name") %></td>
<td><%=rs.getString("sex") %></td>
<td><%=rs.getString("age") %></td>
<td><%=rs.getString("weight") %></td>
<td><%=rs.getString("hight") %></td>
</tr>
<%} %>
</table>
</center>
<%if(rs!=null){rs.close();}
if(pstmt!=null){pstmt.close();}
if(dbConn!=null){dbConn.close();}
%>
</body>
</html>按条件查询学生
提交查询条件
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>查询条件提交页面</title>
</head>
<body>
请选择查询条件<hr width="100%" size="3">
<form action="find_stu_3.jsp" method="post">
性别：男<input type="radio" value="男" name="sex" checked="checked">
女<input type="radio" value="女" name="sex"><br><br>
体重范围：<p>
最小<input type="text" value="0" name="w1"><br><br>
最大<input type="text" value="150" name="w2"><p>
<input type="submit" value="提交">
<input type="reset" value="取消">
</form>
</body>
</html>查询页面
<%@ page language="java" contentType="text/html; charset=UTF-8" import="java.sql.*"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>实现查询页面</title>
</head>
<body>
<center>
<% String driverName = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
//加载JDBC驱动
String dbURL = "jdbc:sqlserver://localhost:1433; DatabaseName=zero";
//连接服务器和数据库
String userName = "sa"; // 默认用户名
String userPwd = "123456"; // 密码
Connection dbConn = null;
try {
Class.forName(driverName);
dbConn = DriverManager.getConnection(dbURL, userName, userPwd);
// System.out.println("Connection Successful!");
// 如果连接成功 控制台输出Connection Successful!
} catch (Exception e) {
e.printStackTrace();
// System.out.println("连接失败");
}
request.setCharacterEncoding("UTF-8");//设置字符编码，避免出现乱码
String sex=request.getParameter("sex");
float weight1=Float.parseFloat(request.getParameter("w1"));
float weight2=Float.parseFloat(request.getParameter("w2"));
//Statement stmt =dbConn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_READ_ONLY);
String sql="select * from stu_info where sex=? and weight>=? and weight<=?";
PreparedStatement pstmt=dbConn.prepareStatement(sql,ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
pstmt.setString(1,sex);
pstmt.setFloat(2,weight1);
pstmt.setFloat(3,weight2);
ResultSet rs=pstmt.executeQuery();
rs.last();
%>你要查询的学生数据表中共有
<font size="5" color="red"><%=rs.getRow()%></font>人
<table border="2" bgcolor="ccceee" width="650">
<tr bgcolor="CCCCCC" align="center">
<td>记录条数</td><td>学号</td><td>姓名</td>
<td>性别</td><td>年龄</td><td>体重</td><td>身高</td>
</tr>
<% rs.beforeFirst(); //移至第一条记录之前
while (rs.next()){
%> <tr align="center">
<td><%=rs.getRow() %></td>
<td><%=rs.getString("id") %></td>
<td><%=rs.getString("name") %></td>
<td><%=rs.getString("sex") %></td>
<td><%=rs.getString("age") %></td>
<td><%=rs.getString("weight") %></td>
<td><%=rs.getString("hight") %></td>
</tr>
<%} %>
</table>
</center>
<%if(rs!=null){rs.close();}
if(pstmt!=null){pstmt.close();}
if(dbConn!=null){dbConn.close();}
%>
</body>
</html>