学生成绩管理系统实战练习之登陆界面
开发软件：eclips
使用插件：windowsbuilder
代码风格：Swing
源码如下
package UI;import UI.MySystemUI;import java.awt.EventQueue;import javax.swing.ImageIcon;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.JLabel;import javax.swing.JOptionPane;import javax.swing.border.LineBorder;import java.awt.Color;import java.awt.event.MouseEvent;import java.awt.event.MouseListener;import java.awt.Font;import javax.swing.JPasswordField;import javax.swing.JFormattedTextField;import java.awt.Button;import java.awt.event.ActionListener;import java.awt.event.ActionEvent;public class Login extends JFrame {/*** */private static final long serialVersionUID = 1L;private JPanel LoginPanel;private JPasswordField passwordField;/*** Launch the application.*/public static void main(String[] args) {EventQueue.invokeLater(new Runnable() {public void run() {try {Login frame = new Login();frame.setVisible(true);} catch (Exception e) {e.printStackTrace();}}});}/*** Create the frame.*/public Login() {/*** 创建并设置登陆界面主面板*/setTitle("学生成绩管理系统登陆界面（1.0）");setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);setBounds(100, 100, 485, 343);setResizable(false);//禁止最大化setLocationRelativeTo(null);//居中/*** 创建主布局Panel*/LoginPanel = new JPanel();LoginPanel.setBorder(new LineBorder(new Color(0, 0, 0)));setContentPane(LoginPanel);LoginPanel.setLayout(null); /*** 添加背景图片到JLabel中*/ImageIcon backimg;backimg=new ImageIcon("E:\\JavaECode\\GUIofManagementSystem\\src\\Picture\\Back.jpg");/*** 创建一个账号标签*/JLabel IDLabel = new JLabel("账 号：");IDLabel.setFont(new Font("新宋体", Font.BOLD, 20));IDLabel.setForeground(Color.LIGHT_GRAY);IDLabel.setBounds(49, 170, 91, 38);IDLabel.setOpaque(false);LoginPanel.add(IDLabel);/*** 创建一个密码标签*/JLabel PasswordLabel = new JLabel("密 码：");PasswordLabel.setOpaque(false);PasswordLabel.setForeground(Color.LIGHT_GRAY);PasswordLabel.setFont(new Font("新宋体", Font.BOLD, 20));PasswordLabel.setBounds(49, 221, 91, 38);LoginPanel.add(PasswordLabel);/*** 登陆文本框*/final JFormattedTextField idTextField = new JFormattedTextField();idTextField.setForeground(Color.LIGHT_GRAY);idTextField.setToolTipText("");idTextField.setText("请输入您的账号");idTextField.setBounds(143, 175, 227, 33);// 添加账号框事件idTextField.addMouseListener(new MouseListener() {public void mouseReleased(MouseEvent e) {// TODO 当用户松开鼠标按钮时发生}public void mousePressed(MouseEvent e) {// TODO 当用户按下鼠标按钮时发生.if(idTextField.getText().equals("请输入您的账号"))idTextField.setText(null);idTextField.setForeground(Color.BLACK);}public void mouseExited(MouseEvent e) {// TODO 当鼠标离开你所监听的组件时发生.}public void mouseEntered(MouseEvent e) {// TODO 当鼠标离开当前组件并进入你所监听的组件时激活事件.}public void mouseClicked(MouseEvent e) {// TODO 鼠标按下后松开}});LoginPanel.add(idTextField);/*** 密码框*/passwordField = new JPasswordField();passwordField.setBounds(143, 221, 227, 33);LoginPanel.add(passwordField);/*** 登陆按钮*/Button StdBtn = new Button("\u7BA1\u7406\u5458\u767B\u9646");StdBtn.addActionListener(new ActionListener() {@SuppressWarnings("deprecation")public void actionPerformed(ActionEvent e) {if(idTextField.getText().equals("1")&&passwordField.getText().equals("1")) {/*** 登陆成功后自动关闭登陆界面进入到信息界面*/System.out.print("登陆成功");dispose();MySystemUI F=new MySystemUI();F.setVisible(true);}else {JOptionPane.showMessageDialog(null,"账户或密码错误，登陆失败！" ,null, JOptionPane.ERROR_MESSAGE);}}});StdBtn.setForeground(Color.DARK_GRAY);StdBtn.setFont(new Font("宋体", Font.BOLD, 17));StdBtn.setBackground(Color.LIGHT_GRAY);StdBtn.setBounds(178, 266, 110, 33);LoginPanel.add(StdBtn);/*** 背景图片的设置*/JLabel BackgroundLabel = new JLabel(backimg);BackgroundLabel.setBounds(0, 0, 482, 309);LoginPanel.add(BackgroundLabel);}}
运行结果：
