package com.company;
import java.sql.Connection;
import java.sql.Driver;
import java.sql.DriverManager;
import java.sql.Statement;
public class Main {
public static void main(String[] args) throws Exception {
// write your code here
//1.导入驱动包jar包 下载jar包链接:https://dev.mysql.com/downloads/connector/j/5.1.html 下载zip文件,解压后复制到lib文件,然后右击libs设置为 Add as library
//2.注册驱动
Class.forName("com.mysql.cj.jdbc.Driver");
//3.获取数据库连接对象 db2是你的数据库名称 root 是你mysql用户名 后面是你的mysql密码
Connection conn=DriverManager.getConnection( "jdbc:mysql://localhost:3306/db2?serverTimezone=GMT%2B8","root","123");
//4.定义sql语句
String sql="update db1 set class=101 where sno=1";
//5.获取执行sql的对象 Statement
Statement stmt=conn.createStatement();
//6.执行sql
int count=stmt.executeUpdate(sql);
//7.处理结果
System.out.println(count);
//8.释放资源
stmt.close();
conn.close();
}
}