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,"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(); 
  } 
}