majorsrs.java

使用java编写的一个学生选课系统

package Srs;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import Srs.AfterLoad;
import Srs.LinkDatabase;
import Srs.GetPassword;
import Srs.Regist;
public class MajorSrs extends JFrame implements ActionListener{

	private JTextField textField_2;
	private JTextField textField_1;
	/**
	 * Launch the application
	 * @param args
	 */

	/**
	 * Create the frame
	 */
	private JButton button = new JButton();
	private JButton button_1 = new JButton();
	private JLabel label = new JLabel();
	private JLabel label_1 = new JLabel();
	private JLabel label_2 = new JLabel();
	private JPasswordField passwordField = new JPasswordField();
	private JTextField textField = new JTextField();
	private JButton button_2 = new JButton();
	private LinkDatabase linkDatabase = new LinkDatabase();
	public MajorSrs(){
		this.init();
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  //关闭窗口时退出程序
	}
	public void init() {
		getContentPane().setLayout(null);
		setBounds(100, 100, 500, 375);
		this.setLocationRelativeTo(null);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
		button.setText("登陆");
		button.setFont(new Font("楷体_GB2312", Font.BOLD, 18));
		button.setBounds(151, 269, 82, 28);
		getContentPane().add(button);
		button.addActionListener(this);

		button_1.setText("取消");
		button_1.setFont(new Font("楷体_GB2312", Font.BOLD, 18));
		button_1.setBounds(268, 269, 82, 28);
		getContentPane().add(button_1);
		button_1.addActionListener(this);

		label.setFont(new Font("楷体_GB2312", Font.BOLD, 24));
		label.setComponentPopupMenu(null);
		label.setText("欢迎来到北京航空航天大学学生注册系统");
		label.setBounds(25, 10, 457, 79);
		getContentPane().add(label);

		label_1.setFont(new Font("楷体_GB2312", Font.BOLD, 18));
		label_1.setText("用户名：");
		label_1.setBounds(134, 117, 89, 35);
		getContentPane().add(label_1);

		label_2.setFont(new Font("楷体_GB2312", Font.BOLD, 18));
		label_2.setText("密码：");
		label_2.setBounds(134, 190, 89, 35);
		getContentPane().add(label_2);

		textField.setBounds(223, 122, 140, 28);
		getContentPane().add(textField);

		passwordField.setBounds(223, 195, 140, 29);
		getContentPane().add(passwordField);
		
		button_2.setFont(new Font("楷体_GB2312", Font.BOLD, 11));
		button_2.setForeground(new Color(128, 128, 128));
		button_2.setText("注册");
		button_2.setBounds(420, 308, 62, 23);
		getContentPane().add(button_2);
		button_2.addActionListener(this);
		//
		
	}
	public JTextField getJTextField(){
		return this.textField;
	}
	public JPasswordField getJPasswordField(){
		return this.passwordField;
	}
	public void actionPerformed(ActionEvent e){
		
		if(e.getSource() == button){
			if(!this.textField.getText().equals("")&&
					!String.valueOf(this.passwordField.getPassword()).equals("")){
			GetPassword get = new GetPassword();
			char[] x = this.passwordField.getPassword();
			String z = String.valueOf(x);
			String y = get.getPassword(this.textField.getText());
			if(y == null){
				JOptionPane newone = new JOptionPane();
				newone.showMessageDialog(null, "     "+"用户名或密码错误"+
						"\n"+"若未注册，请注册后登陆");
			}
			else{
			int m = Integer.parseInt(z);
			int n = Integer.parseInt(y);
			if(m == n){
				AfterLoad afterload = new AfterLoad(this.textField.getText());
				this.setVisible(false);
				afterload.setVisible(true);
			}
			else{
				JOptionPane newone = new JOptionPane();
				newone.showMessageDialog(null, "     "+"用户名或密码错误"+
						"\n"+"若未注册，请注册后登陆");
			}
			}
			}
			else{
				JOptionPane newone = new JOptionPane();
				newone.showMessageDialog(null, "用户名或密码不能为空");
			}
		}
		
		else if(e.getSource() == button_1){
			this.textField.setText("");
			this.passwordField.setText("");
		}
		else if(e.getSource() == button_2){
			Regist regist = new Regist();
			this.setVisible(false);
			regist.setVisible(true);
		}
			
	}

	

}