2020-06-06

today
we are about to have java test, so this is my first csdnlog.
import java.sql.Connection; import javax.swing.JOptionPane;public class TestHelper { public static void main(String[] args) { Connection conn=SqlHelper.connect(); if(conn!=null){ JOptionPane.showMessageDialog(null, "数据库连接成功!"); SqlHelper.closeConnection(conn); }else{ JOptionPane.showMessageDialog(null, "数据库连接失败!"); } }}