登陆界面的源代码package loginframe;import java.awt.BorderLayout;import java.awt.GridBagLayout;import java.awt.GridLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import java.sql.Statement;import java.sql.Connection;import java.sql.DriverManager;import java.sql.ResultSet;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JOp
