Java swing学习过程中写的一个小程序

最近在学习java中的swing，做了一个小小的程序记录学习成果。

涉及知识点：swing中的gridBagLayout,事件处理等，以及正则表达式。

实现效果图：

实现代码如下：

/**
 * swing小程序
 * Data : 2018-6-18
 * @author magentaLi
 */
public class ScheduleRecords extends JFrame {

	private static final long serialVersionUID = 1L;

	private JPanel panelLeft;
	private JPanel panelRight;

	private JList list;
	private DefaultListModel listModel;

	private JPanel bottomLeft;
	private JButton btnAdd;
	private JButton btnDel;
	private JButton btnClear;

	private JLabel dateLabel;
	private JLabel timeLabel;
	private JLabel eventLabel;
	private JLabel palceLabel;
	private JLabel participantLabel;
	private JLabel remarksLabel;

	private JTextField dateTF;
	private JTextField timeTF;
	private JTextField eventTF;
	private JTextField placeTF;
	private JTextField participantTF;
	private JTextArea remarksTA;

	private JPanel bottomRight;
	private JButton btnEdit;
	private JButton btnCancel;
	private JButton btnConfirm;

	private Boolean btnEditClicked = false;
	private Boolean btnAddClicked = false;

	public ScheduleRecords() {
		super("日程记录");
		init();
	}

	private void init() {
		// 设置左右面板
		panelLeft = new JPanel();
		panelRight = new JPanel();
		// 设置左右面板的边框
		panelLeft.setBorder(BorderFactory.createLoweredBevelBorder());
		panelRight.setBorder(BorderFactory.createLoweredBevelBorder());

		// 采用GridBagLayout布局设置左右面板的位置及大小
		GridBagLayout gbLayout = new GridBagLayout();
		setLayout(gbLayout);
		GridBagConstraints gbCons = new GridBagConstraints();

		// 左面板的布局属性
		gbCons.gridx = 0;
		gbCons.gridy = 0;
		gbCons.weightx = 1.0;
		gbCons.weighty = 1.0;
		gbCons.fill = GridBagConstraints.BOTH;
		gbCons.insets = new Insets(20, 30, 20, 10);
		add(panelLeft, gbCons);

		// 右面板的布局属性
		gbCons.gridx = 1;
		gbCons.gridy = 0;
		gbCons.weightx = 1.0;
		gbCons.weighty = 1.0;
		gbCons.fill = GridBagConstraints.BOTH;
		gbCons.insets = new Insets(20, 10, 20, 30);
		add(panelRight, gbCons);

		// 创建一个 JList 实例
		listModel = new DefaultListModel();
		listModel.addElement("2018-4-20 14:20 Java考试");
		listModel.addElement("2018-5-20 15:50 Oracle考试 ");
		listModel.addElement("2018-6-20 19:30 Linux考试 ");

		list = new JList(listModel);
		list.setFixedCellHeight(50);
		// 只允许单选
		list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);

		// 设置左面板内各个组件的布局
		GridBagLayout gbLayoutLeft = new GridBagLayout();
		panelLeft.setLayout(gbLayoutLeft);
		GridBagConstraints gbConLeft = new GridBagConstraints();

		// List的属性
		gbConLeft.gridx = 0;
		gbConLeft.gridy = 0;
		gbConLeft.gridwidth = 3;
		gbConLeft.gridheight = 4;
		gbConLeft.weightx = 1.0;
		gbConLeft.weighty = 1.0;
		gbConLeft.fill = GridBagConstraints.BOTH;
		gbConLeft.insets = new Insets(10, 10, 10, 10);
		panelLeft.add(new JScrollPane(list), gbConLeft);

		// 列表区的三个按钮
		bottomLeft = new JPanel();
		btnAdd = new JButton("添加");
		btnDel = new JButton("删除");
		btnClear = new JButton("清空");

		//设置左侧面板底部的按钮的布局
		GridBagLayout bLayout = new GridBagLayout();
		bottomLeft.setLayout(bLayout);
		GridBagConstraints bCons = new GridBagConstraints();

		bCons.gridx = 0;
		bCons.gridy = 0;
		bCons.gridwidth = 1;
		bCons.gridheight = 1;
		bCons.weightx = 1.0;
		bCons.weighty = 0.0;
		bCons.fill = GridBagConstraints.NONE;
		bCons.anchor = GridBagConstraints.LINE_START;
		bottomLeft.add(btnAdd, bCons);
		bCons.gridx = 1;
		bCons.anchor = GridBagConstraints.CENTER;
		bottomLeft.add(btnDel, bCons);
		bCons.gridx = 2;
		bCons.anchor = GridBagConstraints.LINE_END;
		bottomLeft.add(btnClear, bCons);
		
		//bottomLeft的位置
		gbConLeft.gridx = 0;
		gbConLeft.gridy = 4;
		gbConLeft.gridwidth = 3;
		gbConLeft.gridheight = 1;
		gbConLeft.weightx = 1.0;
		gbConLeft.weighty = 0.0;
		gbConLeft.fill = GridBagConstraints.BOTH;
		gbConLeft.insets = new Insets(10, 10, 10, 20);
		panelLeft.add(bottomLeft, gbConLeft);

		// 设置右边面板的布局
		GridBagLayout gblayoutRight = new GridBagLayout();
		panelRight.setLayout(gblayoutRight);
		GridBagConstraints gbConsRight = new GridBagConstraints();

		dateLabel = new JLabel("*日期：");
		gbConsRight.gridx = 0;
		gbConsRight.gridy = 0;
		gbConsRight.gridwidth = 1;
		gbConsRight.gridheight = 1;
		gbConsRight.weightx = 1.0;
		gbConsRight.weighty = 0.0;
		gbConsRight.anchor = GridBagConstraints.EAST;
		gbConsRight.fill = GridBagConstraints.NONE;
		gbConsRight.insets = new Insets(10, 0, 10, 0);
		panelRight.add(dateLabel, gbConsRight);

		dateTF = new JTextField();
		dateTF.setEditable(false);
		gbConsRight.gridx = 1;
		gbConsRight.gridy = 0;
		gbConsRight.gridwidth = 1;
		gbConsRight.gridheight = 1;
		gbConsRight.weightx = 1.0;
		gbConsRight.weighty = 0.0;
		gbConsRight.fill = GridBagConstraints.BOTH;
		gbConsRight.anchor = GridBagConstraints.WEST;
		panelRight.add(dateTF, gbConsRight);

		timeLabel = new JLabel("*时间：");
		gbConsRight.gridx = 2;
		gbConsRight.gridy = 0;
		gbConsRight.gridwidth = 1;
		gbConsRight.gridheight = 1;
		gbConsRight.weightx = 1.0;
		gbConsRight.weighty = 0.0;
		gbConsRight.fill = GridBagConstraints.NONE;
		gbConsRight.anchor = GridBagConstraints.EAST;
		panelRight.add(timeLabel, gbConsRight);

		timeTF = new JTextField();
		timeTF.setEditable(false);
		gbConsRight.gridx = 3;
		gbConsRight.gridy = 0;
		gbConsRight.gridwidth = 1;
		gbConsRight.gridheight = 1;
		gbConsRight.weightx = 1.0;
		gbConsRight.weighty = 0.0;
		gbConsRight.insets = new Insets(10, 0, 10, 50);
		gbConsRight.fill = GridBagConstraints.BOTH;
		panelRight.add(timeTF, gbConsRight);

		eventLabel = new JLabel("*事件：");
		gbConsRight.gridx = 0;
		gbConsRight.gridy = 1;
		gbConsRight.gridwidth = 1;
		gbConsRight.gridheight = 1;
		gbConsRight.weightx = 1.0;
		gbConsRight.weighty = 0.0;
		gbConsRight.insets = new Insets(10, 0, 10, 0);
		gbConsRight.fill = GridBagConstraints.NONE;
		gbConsRight.anchor = GridBagConstraints.EAST;
		panelRight.add(eventLabel, gbConsRight);

		eventTF = new JTextField();
		eventTF.setEditable(false);
		gbConsRight.gridx = 1;
		gbConsRight.gridy = 1;
		gbConsRight.gridwidth = 3;
		gbConsRight.gridheight = 1;
		gbConsRight.weightx = 1.0;
		gbConsRight.weighty = 0.0;
		gbConsRight.fill = GridBagConstraints.HORIZONTAL;
		gbConsRight.anchor = GridBagConstraints.WEST;
		gbConsRight.insets = new Insets(10, 0, 10, 50);
		panelRight.add(eventTF, gbConsRight);

		palceLabel = new JLabel("地点：");
		gbConsRight.gridx = 0;
		gbConsRight.gridy = 2;
		gbConsRight.gridwidth = 1;
		gbConsRight.gridheight = 1;
		gbConsRight.weightx = 1.0;
		gbConsRight.weighty = 0.0;
		gbConsRight.ipadx = 0;
		gbConsRight.fill = GridBagConstraints.NONE;
		gbConsRight.anchor = GridBagConstraints.EAST;
		gbConsRight.insets = new Insets(10, 0, 10, 0);
		panelRight.add(palceLabel, gbConsRight);

		placeTF = new JTextField();
		placeTF.setEditable(false);
		gbConsRight.gridx = 1;
		gbConsRight.gridy = 2;
		gbConsRight.gridwidth = 3;
		gbConsRight.gridheight = 1;
		gbConsRight.weightx = 1.0;
		gbConsRight.weighty = 0.0;
		gbConsRight.fill = GridBagConstraints.BOTH;
		gbConsRight.insets = new Insets(10, 0, 10, 50);
		panelRight.add(placeTF, gbConsRight);

		participantLabel = new JLabel("参与者：");
		gbConsRight.gridx = 0;
		gbConsRight.gridy = 3;
		gbConsRight.gridwidth = 1;
		gbConsRight.gridheight = 1;
		gbConsRight.weightx = 1.0;
		gbConsRight.weighty = 0.0;
		gbConsRight.fill = GridBagConstraints.NONE;
		gbConsRight.anchor = GridBagConstraints.EAST;
		gbConsRight.insets = new Insets(10, 0, 10, 0);
		panelRight.add(participantLabel, gbConsRight);

		participantTF = new JTextField();
		participantTF.setEditable(false);
		gbConsRight.gridx = 1;
		gbConsRight.gridy = 3;
		gbConsRight.gridwidth = 3;
		gbConsRight.gridheight = 1;
		gbConsRight.weightx = 1.0;
		gbConsRight.weighty = 0.0;
		gbConsRight.fill = GridBagConstraints.BOTH;
		gbConsRight.insets = new Insets(10, 0, 10, 50);
		panelRight.add(participantTF, gbConsRight);

		remarksLabel = new JLabel("备注：");
		gbConsRight.gridx = 0;
		gbConsRight.gridy = 4;
		gbConsRight.gridwidth = 1;
		gbConsRight.gridheight = 1;
		gbConsRight.weightx = 1.0;
		gbConsRight.weighty = 0.0;
		gbConsRight.fill = GridBagConstraints.NONE;
		gbConsRight.anchor = GridBagConstraints.EAST;
		gbConsRight.insets = new Insets(10, 0, 10, 0);
		panelRight.add(remarksLabel, gbConsRight);

		remarksTA = new JTextArea();
		remarksTA.setEditable(false);
		gbConsRight.gridx = 1;
		gbConsRight.gridy = 4;
		gbConsRight.gridwidth = 3;
		gbConsRight.gridheight = 4;
		gbConsRight.weightx = 1.0;
		gbConsRight.weighty = 1.0;
		gbConsRight.ipadx = 300;
		gbConsRight.ipady = 60;
		gbConsRight.fill = GridBagConstraints.BOTH;
		gbConsRight.insets = new Insets(10, 0, 10, 50);
		panelRight.add(remarksTA, gbConsRight);

		bottomRight = new JPanel(bLayout);
		btnEdit = new JButton("编辑");
		btnCancel = new JButton("取消");
		btnConfirm = new JButton("确定");

		bCons.gridx = 0;
		bCons.gridy = 0;
		bCons.gridwidth = 1;
		bCons.gridheight = 1;
		bCons.weightx = 1.0;
		bCons.weighty = 0.0;
		bCons.fill = GridBagConstraints.NONE;
		bCons.anchor = GridBagConstraints.LINE_START;
		bottomRight.add(btnEdit, bCons);
		bCons.gridx = 1;
		bCons.anchor = GridBagConstraints.EAST;
		bottomRight.add(btnCancel, bCons);
		bCons.gridx = 2;
		bCons.anchor = GridBagConstraints.LINE_END;
		bottomRight.add(btnConfirm, bCons);

		gbConsRight.gridx = 1;
		gbConsRight.gridy = 9;
		gbConsRight.gridwidth = 3;
		gbConsRight.gridheight = 1;
		gbConsRight.weightx = 1.0;
		gbConsRight.weighty = 0.0;
		gbConsRight.ipadx = 0;
		gbConsRight.ipady = 0;
		gbConsRight.fill = GridBagConstraints.BOTH;
		panelRight.add(bottomRight, gbConsRight);

		// 主面板的大小
		setSize(1000, 600);
		// 设置主面板点击可关闭
		setDefaultCloseOperation(DISPOSE_ON_CLOSE);
		// 设置主面板的可见性
		setVisible(true);

		// 事件处理
		//list默认选中第一项
		list.setSelectedIndex(0);
		//默认各个文本框中的内容为list的第一项的内容
		setTFText();
		list.addListSelectionListener(new ListSelectionListener() {
			@Override
			public void valueChanged(ListSelectionEvent e) {
				//设置只有释放鼠标时才触发
				if (!list.getValueIsAdjusting()) { 
					//设置右侧面板中的文本框的内容为选中项的内容
					setTFText();
				}
			}
		});
		
		btnAdd.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				btnAddClicked = true;
				//清空右侧的文本框
				clearAllTF();
			}
		});

		btnCancel.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				//设置右侧各个文本框的为不可编辑的
				setTFEditable(false);
				setTFText();
			}
		});

		btnConfirm.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				Boolean dateInputCorrect = true;
				Boolean timeInputCorrect = true;
				Boolean eventInputCorrect = true;
				String date = dateTF.getText();
				String time = timeTF.getText();
				String event = eventTF.getText();
				if (btnEditClicked) {
					if (!isDate(date)) {
						JOptionPane.showMessageDialog(panelRight, "日期错误或日期格式错误！", "发生错误", JOptionPane.WARNING_MESSAGE);
						dateInputCorrect = false;
					}
					if (!isTime(time)) {
						JOptionPane.showMessageDialog(panelRight, "时间格式错误！", "发生错误", JOptionPane.WARNING_MESSAGE);
						timeInputCorrect = false;
					}
					if (!eventExits()) {
						JOptionPane.showMessageDialog(panelRight, "事件未填写！", "发生错误", JOptionPane.WARNING_MESSAGE);
						eventInputCorrect = false;
					}
					if (dateInputCorrect && timeInputCorrect && eventInputCorrect) {
						String items = date + " " + time + " " + event;
						listModel.setElementAt(items, list.getSelectedIndex());
					}
					btnEditClicked = false;
				}
				if (btnAddClicked) {
					if (!isDate(date)) {
						JOptionPane.showMessageDialog(panelRight, "日期错误或日期格式错误！", "发生错误", JOptionPane.WARNING_MESSAGE);
						dateInputCorrect = false;
					}
					if (!isTime(time)) {
						JOptionPane.showMessageDialog(panelRight, "时间格式错误！", "发生错误", JOptionPane.WARNING_MESSAGE);
						timeInputCorrect = false;
					}
					if (!eventExits()) {
						JOptionPane.showMessageDialog(panelRight, "事件未填写！", "发生错误", JOptionPane.WARNING_MESSAGE);
						eventInputCorrect = false;
					}
					if (dateInputCorrect && timeInputCorrect && eventInputCorrect) {
						String items = date + " " + time + " " + event;
						listModel.addElement(items);
					}
					btnAddClicked = false;
				}
				setTFEditable(false);
			}
		});

		btnDel.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				// 如果用户已经选中的一项
				if (list.getSelectedIndex() >= 0) {
					Object[] options = { "删除", "取消 " };
					int response = JOptionPane.showOptionDialog(panelLeft, "是否删除选中项？", "请确认 ", JOptionPane.YES_OPTION,
							JOptionPane.QUESTION_MESSAGE, null, options, options[0]);
					if (response == 0) {
						clearAllTF();
						listModel.removeElementAt(list.getSelectedIndex());
					}
				} else if (listModel.size() == 0) {
					JOptionPane.showMessageDialog(panelLeft, "列表为空", "警告", JOptionPane.WARNING_MESSAGE);
				} else if (list.getSelectedIndex() <= 0) {
					JOptionPane.showMessageDialog(panelLeft, "没有选中任何项目", "警告", JOptionPane.WARNING_MESSAGE);
				}
			}
		});

		btnClear.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				if (listModel.size() == 0) {
					JOptionPane.showMessageDialog(panelLeft, "列表为空", "警告", JOptionPane.WARNING_MESSAGE);
				} else {
					Object[] options = { "清空", "取消 " };
					int response = JOptionPane.showOptionDialog(panelLeft, "确定清空列表？", "请确认 ", JOptionPane.YES_OPTION,
							JOptionPane.QUESTION_MESSAGE, null, options, options[0]);
					if (response == 0) {
						clearAllTF();
						listModel.removeAllElements();
					}
				}
			}
		});

		btnEdit.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				btnEditClicked = true;
				if (list.getSelectedIndex() >= 0) {
					setTFEditable(true);
				} else {
					JOptionPane.showMessageDialog(panelRight, "未选中列表中的任何一项", "警告", JOptionPane.WARNING_MESSAGE);
				}

			}
		});

	}
	public static void main(String[] args) {
		ScheduleRecords sr = new ScheduleRecords();
	}

	// 设置各个文本框中的内容
	public void setTFText() {
		if (list.getSelectedIndex() >= 0) {
			String str = list.getSelectedValue();
			String[] items = str.split(" ");
			dateTF.setText(items[0]);
			timeTF.setText(items[1]);
			eventTF.setText(items[2]);
			placeTF.setText("实验楼西303");
			participantTF.setText("全体同学老师！");
			remarksTA.setText("可以带书和API文档 \r\n考试内容是Java Swing\r\n考试时间两个小时\r\n");
			setTFEditable(false);
		}
	}

	//清空所有的文本框
	public void clearAllTF() {
		int i = panelRight.getComponentCount();
		for (int j = 0; j < i; j++) {
			Component comp = panelRight.getComponent(j);
			if (comp instanceof JTextField) {
				JTextField tf = (JTextField) comp;
				tf.setText("");
				tf.setEditable(true);
			}
			if (comp instanceof JTextArea) {
				JTextArea ta = (JTextArea) comp;
				ta.setText("");
				ta.setEditable(true);
			}
		}
	}

	//判断日期是否合法
	public boolean isDate(String date) {
		Pattern p = Pattern.compile("^((\\d{2}(([02468][048])|([13579][26]))[\\-\\/\\s]?"
				+ "((((0?[13578])|(1[02]))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|"
				+ "(((0?[469])|(11))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(30)))|"
				+ "(0?2[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])))))|(\\d{2}(([02468][1235679])|"
				+ "([13579][01345789]))[\\-\\/\\s]?((((0?[13578])|(1[02]))[\\-\\/\\s]?"
				+ "((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\\-\\/\\s]?((0?[1-9])|"
				+ "([1-2][0-9])|(30)))|(0?2[\\-\\/\\s]?((0?[1-9])|(1[0-9])|(2[0-8]))))))?$");
		return p.matcher(date).matches();
	}

	//判断时间是否合法
	public boolean isTime(String time) {
		Pattern p = Pattern.compile("((((0?[0-9])|([1][0-9])|([2][0-4]))\\:([0-5]?[0-9])))?$");
		return p.matcher(time).matches();
	}

	//判断是否填写了事件
	public boolean eventExits() {
		if ("".equals(eventTF.getText())) {
			return false;
		} else {
			return true;
		}
	}
	
	//设置文本框是否可编辑
	public void setTFEditable(Boolean CanOrCanot) {
		int i = panelRight.getComponentCount();
		for (int j = 0; j < i; j++) {
			Component comp = panelRight.getComponent(j);
			if (comp instanceof JTextField) {
				JTextField tf = (JTextField) comp;
				tf.setEditable(CanOrCanot);
			}
			if (comp instanceof JTextArea) {
				JTextArea ta = (JTextArea) comp;
				ta.setEditable(CanOrCanot);
			}
		}
	}
}

总结：Swing有些笨重，用的也不太熟练，还需加油！