package 各界面;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.JPasswordField;
public class Login extends JFrame{
private JPanel p;
private JButton Entry,Register,Clear;
private JLabel user,password,hint;
private JTextField u1;
private JPasswordField w1;
public Login(){
super("图书馆管理系统");
p=new JPanel(null);
ImageIcon pic=new ImageIcon("image\02.png");
Entry=new JButton("登录");
Register=new JButton("注册");
Clear=new JButton("重置");
user=new JLabel("用户名：");
password=new JLabel("密码：");
hint=new JLabel();
u1=new JTextField(20);
w1=new JPasswordField(20);
w1.setEchoChar('*');
user.setBounds(30,90,60,25);
u1.setBounds(95,90,150,25);
password.setBounds(30,120,60,25);
w1.setBounds(95,120,150,25);
Entry.setBounds(60,215,60,25);
Register.setBounds(125,215,60,25);
Clear.setBounds(190,215,60,25);
hint.setBounds(60,185,180,25);
Entry.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
SQL2008 entry=new SQL2008();
String user=u1.getText();
if(user==null||user.equals("")){
hint.setText("用户名和密码不能为空!");
return;
}
String password=new String(w1.getPassword());
if(password==null||password.equals("")){
hint.setText("密码不能为空:");
return;
}
hint.setText("登录成功");
}
});
Clear.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
u1.setText("");
w1.setText("");
}
});
this.add(p);
p.add(Entry);
p.add(Register);
p.add(Clear);
p.add(user);
p.add(u1);
p.add(password);
p.add(w1);
p.add(hint);
this.setSize(400,300);
this.setLocation(600,600);
this.setIconImage(pic.getImage());
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setVisible(true);
this.setIconImage(pic.getImage());
}
public static void main(String[] args) {
new Login();
}
}
