JDBC连接数据库（查询）

public class App {     public static void main(String[] args) throws Exception {                           Class.forName("com.mysql.cj.jdbc.Driver");                  Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/vip?serverTimezone=GMT&useSSL=false", "root", "zhangpn");                  Statement stat = conn.createStatement();                  ResultSet res = stat.executeQuery("select * from sys_user");                  while(res.next()){             System.out.println(res.getString(1)+"***"+res.getString(2)+"***"+res.getString(3)+"***"+res.getString(4));         }                  res.close();         stat.close();         conn.close();              } }

1.加载启动：Class.forName("com.mysql.cj.jdbc.Driver");

2.获取连接：Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/vip?serverTimezone=GMT&useSSL=false", "root", "zhangpn");

3.创建语句对象：Statement stat = conn.createStatement();

4.执行SQL并获取数据：ResultSet res = stat.executeQuery("select * from sys_user");

6.关闭连接：close()

原文：https://www.cnblogs.com/batj/p/9215509.html