Program sharing for creating databases and tables in Java

This article mainly introduces the procedures for writing and creating databases and tables in Java in detail. It has certain reference value. Interested friends can refer to it.

The examples in this article can be seen, mainly The principle of operating SQL statements through Java is the same as ordinary addition, deletion, modification and query:

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(); 
  } 
}

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