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();   } }