<%@ page language="java" import="java.sql.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <% String sql="select * from student where id=?"; Class.forName("com.mysql.jdbc.Driver"); Connection conn=DriverManager.getConnection("jdbc:mysql:///student","root","123456"); PreparedStatement pstmt = conn.prepareStatement(sql); pstmt.setInt(1,3); ResultSet rs=pstmt.executeQuery(); if(rs.next()) { int mid=rs.getInt(1); String name=rs.getString(2); int age=rs.getInt(3); double scores=rs.getDouble(4); out.println(mid); out.println(name); out.println(age); out.println(scores); } pstmt.close(); conn.close(); %> </body> </html>