通过JDBC连接数据库H2

<%@page import="java.sql.PreparedStatement"%>
<%@page import="java.sql.SQLException"%>
<%@page import="java.sql.ResultSet"%>
<%@page import="java.sql.Statement"%>
<%@page import="java.sql.DriverManager"%>
<%@page import="java.sql.Connection"%>
<%@page import="java.util.*"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<style>
    .form{
    position: absolute;
    padding: 60px;
    top: 200px;
    left: 550px;
    text-align:center;
    width: 400px;
    height: 200px;
    border: 1px solid;
    }
</style>
</head>
<body>
<div class="form" >
   <form method="post" action="grade.jsp">
      分数>=<input type="text" name="selec" style="width: 200px; height: 28px">
      <input type="submit" value="查询" id="search1" height="50px"><br><br>
        <div style="left: 180px ;position: absolute" >
        <table border="1" >
           <tr>
               <th>学号</th>
               <th>姓名</th>
               <th>成绩</th>
           </tr>
           <%!int time=0; %>
   <%
   try{
       Class.forName("org.h2.Driver");
       String url="jdbc:h2:D:/temp/h2/mydb";
       String username="sa";
       String password="";
       Connection conn=DriverManager.getConnection(url,username,password);
       //String s=request.getParameter("selec");
       //System.out.print("+"+s);
       int grade=0;
       if(time==0){

       }else{
           grade=Integer.parseInt(request.getParameter("selec"));
       }
       time++;
       String sql="select * from STUDENT WHERE SCORE>=?";
       PreparedStatement stmt=conn.prepareStatement(sql);
       stmt.setInt(1, grade);
       ResultSet rs=stmt.executeQuery();
       %>
           <% while(rs.next()){
   %>
           <tr>
               <td><%=rs.getString("NO") %></td>
               <td><%=rs.getString("NAME") %></td>
               <th><%=rs.getInt("SCORE") %></th>
           </tr>
           <% } %>
       </table>
      </div>
</form>
</div>
   <%
   rs.close();
       stmt.close();
       conn.close();
   } catch (ClassNotFoundException e) {
       e.printStackTrace();
       } catch(SQLException e){
           e.printStackTrace();
       }
       %>
</body>
</html>

通过JDBC连接数据库H2

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