java编写创建数据库和表的程序

import java.sql.*;         public class Test    {        public static void main(String[] args) throws Exception        {            Class.forName("com.mysql.jdbc.Driver");                         //一开始必须填一个已经存在的数据库            String url = "jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8";               Connection conn = DriverManager.getConnection(url, "root", "123456");            Statement stat = conn.createStatement();                         //创建数据库hello            stat.executeUpdate("create database hello");                         //打开创建的数据库                    stat.close();            conn.close();            url = "jdbc:mysql://localhost:3306/hello?useUnicode=true&characterEncoding=utf-8";            conn = DriverManager.getConnection(url, "root", "123456");            stat = conn.createStatement();                         //创建表test            stat.executeUpdate("create table test(id int, name varchar(80))");                         //添加数据            stat.executeUpdate("insert into test values(1, '张三')");            stat.executeUpdate("insert into test values(2, '李四')");                         //查询数据            ResultSet result = stat.executeQuery("select * from test");            while (result.next())            {                System.out.println(result.getInt("id") + " " + result.getString("name"));            }                         //关闭数据库                    result.close();            stat.close();            conn.close();        }    }