<%@ page contentType="text/html" pageEncoding="UTF-8" import="java.sql.*"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>由提交页面获取查询条件并实现查询的页面</title>
</head>
<body>
<center>
<%
request.setCharacterEncoding("UTF-8");
String driverName= "com.mysql.jdbc.Driver";
String userName="root";
String userPwd="147258369";
String dbName="students";
String url1="jdbc:mysql://localhost:3306/"+dbName;
String url2="?user="+userName+"&password="+userPwd;
String url3="&useUnicode=true&characterEncoding=UTF-8";
String url=url1+url2+url3;
Class.forName(driverName);
Connection conn=DriverManager.getConnection(url);
String sex=request.getParameter("sex");
float weight1=Float.parseFloat(request.getParameter("w1"));
float weight2=Float.parseFloat(request.getParameter("w2"));
String sql="select * from students_info where sex=? and weight>=? and weight<=?";
PreparedStatement pstmt=conn.prepareStatement(sql);
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();
while(rs.next()){
%> <tr align"center">
<td><%=rs.getRow() %>
<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(conn!=null){conn.close();}
%>
</body>
</html>
