jsp连接mysqlupdata操作

<%@ page language="java" contentType="text/html; charset=gb2312"
pageEncoding="gb2312" 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=gb2312">
<title>update数据</title>
</head>
<body>
<center>
<%

String url = "jdbc:mysql://localhost:3306/test";
   String user = "root";
   String password = "110";
   Connection conn = null;
   PreparedStatement pstmt = null;
   String driverName = "com.mysql.jdbc.Driver";
   try {

Class.forName(driverName).newInstance();

conn = DriverManager.getConnection(url, user, password);

   } catch (ClassNotFoundException e) {
    out.println(e);
   } catch (SQLException e) {
    out.println("连接SQLserver数据库失败！！！！！！");
   }

    try{
    Statement stmt = conn.createStatement();
    String sql_update = "update employee set age=58 where id='1'";
    int result_update = stmt.executeUpdate(sql_update);
    }catch(SQLException e){
     out.println("更新失败！");
    }
    try{
     if(pstmt!=null){
      pstmt.close();
      pstmt=null;
     }
     if(conn!=null){
      conn.close();
      conn=null;
     }
    }catch(Exception e){
     out.println("数据库关闭异常！");
    }
    out.println("更新成功！");
   %>
</center>
</body>
</html>