personmanager.java

运用三层结构开发的小型管理系统

		nameField.setEditable(e);
		addressField.setEditable(e);
		dateField.setEditable(e);
		resumeArea.setEditable(e);
	
		maleButton.setEnabled(e);
		femaleButton.setEnabled(e);
	}

	// 利用 initRecord 中的信息设置各控件的初始值，如果 initRecord 是 null，则用空值初始化
	private void setDefaultValue(PersonRecord initRecord) {
		if (initRecord != null) {
			idField.setText(initRecord.id);
			nameField.setText(initRecord.name);
			addressField.setText(initRecord.address);
			dateField.setText(initRecord.birthday.toString());
			resumeArea.setText(initRecord.resume);
		
			maleButton.setSelected(false);
			femaleButton.setSelected(false);
			if (initRecord.sex.equals("男")) maleButton.setSelected(true);
			else femaleButton.setSelected(true);
		} else {
			idField.setText("");
			nameField.setText("");
			addressField.setText("");
			dateField.setText("");
			resumeArea.setText("");
		
			maleButton.setSelected(true);
			femaleButton.setSelected(false);
		}
	}
	
	// 创建输入人员信息的各种控件，并放在方法所返回的窗格中
	private JPanel createInfoPanel() {
		JPanel basicPanel = new JPanel();
		// 为了使得界面比较美观，这里使用了网格包布局管理器
		GridBagLayout layout = new GridBagLayout();
		GridBagConstraints c = new GridBagConstraints();
		c.ipadx = 10;  
		c.weighty = 0.3;  c.weightx = 0.3;
		c.insets = new Insets(5, 0, 5, 0);
		
		basicPanel.setLayout(layout);
		basicPanel.setBorder(BorderFactory.createTitledBorder("基本信息"));
		
		// 创建输入人员代码的提示标签及用户输入的文本字段
		JLabel promptLabel = new JLabel("代码(I)", JLabel.LEFT);
		promptLabel.setDisplayedMnemonic('I');	
		idField = new JTextField(20);
		promptLabel.setLabelFor(idField);
		c.gridx = 0;  c.gridy = 0;
		c.gridwidth = 1;  c.gridheight = 1;
		c.anchor = GridBagConstraints.EAST;
		layout.setConstraints(promptLabel, c);
		basicPanel.add(promptLabel);
		c.gridx = 1;  c.gridy = 0;
		c.gridwidth = 2;  c.gridheight = 1;
		c.anchor = GridBagConstraints.WEST;
		layout.setConstraints(idField, c);
		basicPanel.add(idField);
		
		// 创建输入人员姓名的提示标签及用户输入的文本字段
		promptLabel = new JLabel("姓名(M)", JLabel.LEFT);
		promptLabel.setDisplayedMnemonic('M');	
		nameField = new JTextField(20);
		promptLabel.setLabelFor(nameField);
		c.gridx = 3;  c.gridy = 0;
		c.gridwidth = 1;  c.gridheight = 1;
		c.anchor = GridBagConstraints.EAST;
		layout.setConstraints(promptLabel, c);
		basicPanel.add(promptLabel);
		c.gridx = 4;  c.gridy = 0;
		c.gridwidth = 2;  c.gridheight = 1;
		c.anchor = GridBagConstraints.WEST;
		layout.setConstraints(nameField, c);
		basicPanel.add(nameField);


		// 创建输入人员性别的提示标签及选择用的广播按钮
		promptLabel = new JLabel("性别(S)", JLabel.LEFT);
		promptLabel.setDisplayedMnemonic('S');	
		ButtonGroup group = new ButtonGroup();
		maleButton = new JRadioButton("男");
		maleButton.setSelected(true);		
		group.add(maleButton);
		femaleButton = new JRadioButton("女");
		group.add(femaleButton);
		c.gridx = 0;  c.gridy = 1;
		c.gridwidth = 1;  c.gridheight = 1;
		c.anchor = GridBagConstraints.EAST;
		layout.setConstraints(promptLabel, c);
		basicPanel.add(promptLabel);
		c.gridx = 1;  c.gridy = 1;
		c.gridwidth = 1;  c.gridheight = 1;
		c.anchor = GridBagConstraints.WEST;
		layout.setConstraints(maleButton, c);
		basicPanel.add(maleButton);
		c.gridx = 2;  c.gridy = 1;
		c.gridwidth = 1;  c.gridheight = 1;
		layout.setConstraints(femaleButton, c);
		basicPanel.add(femaleButton);

		
		// 创建输入出生日期的提示标签及用户输入的文本字段，如果使用更复杂的界面，则可编写一个
		// 日期选择器 DateChooser
		promptLabel = new JLabel("出生日期(D)", JLabel.LEFT);
		promptLabel.setDisplayedMnemonic('D');	
		dateField = new JTextField(20);
		promptLabel.setLabelFor(dateField);
		c.gridx = 3;  c.gridy = 1;
		c.gridwidth = 1;  c.gridheight = 1;
		c.anchor = GridBagConstraints.EAST;
		layout.setConstraints(promptLabel, c);
		basicPanel.add(promptLabel);
		c.gridx = 4;  c.gridy = 1;
		c.gridwidth = 2;  c.gridheight = 1;
		c.anchor = GridBagConstraints.WEST;
		layout.setConstraints(dateField, c);
		basicPanel.add(dateField);

		// 创建输入地址信息的提示标签及用户输入的文本字段
		promptLabel = new JLabel("地址(A)", JLabel.LEFT);
		promptLabel.setDisplayedMnemonic('A');	
		addressField = new JTextField(60);
		promptLabel.setLabelFor(addressField);
		c.gridx = 0;  c.gridy = 3;
		c.gridwidth = 1;  c.gridheight = 1;
		c.anchor = GridBagConstraints.EAST;
		layout.setConstraints(promptLabel, c);
		basicPanel.add(promptLabel);
		c.gridx = 1;  c.gridy = 3;
		c.gridwidth = 5;  c.gridheight = 1;
		c.anchor = GridBagConstraints.WEST;
		layout.setConstraints(addressField, c);
		basicPanel.add(addressField);
		
		
		// 创建用于输入个人简历的窗格
		JPanel resumePanel = new JPanel();
		resumePanel.setLayout(new BoxLayout(resumePanel, BoxLayout.Y_AXIS));
		// 设置该窗格使用的带标题的边框
 		resumePanel.setBorder(BorderFactory.createTitledBorder("请输入你的简历"));
		// 创建用于输入个人简历的文本字段，缺省为3行40列
		resumeArea = new JTextArea(3, 40);
		resumeArea.setLineWrap(true);			// 设置在输入时自动折行
		// 将文本区域放置在一个滚动窗格中，以支持输入多行文本
		JScrollPane scroll = new JScrollPane(resumeArea);
		resumePanel.add(scroll);
		
		// 将基本信息窗格和输入简历的窗格都加入到待返回的窗格中
		JPanel infoPanel = new JPanel();
		infoPanel.setLayout(new BorderLayout());
		infoPanel.add(basicPanel, BorderLayout.CENTER);
		infoPanel.add(resumePanel, BorderLayout.SOUTH);
		
		return infoPanel;
	}

	// 创建用于输入人员信息的各种组件。
	private void create() {
		// 获取当前对话框内容面板，所以的控件只能放在内容面板中
		place = getContentPane();
		
		place.setLayout(new BoxLayout(place, BoxLayout.Y_AXIS));
		// 加入放置了各种输入控件的窗格
		place.add(createInfoPanel());

		// 创建一事件监听器，该监听器监听下述两个按钮上发生的事件
		SimpleListener listener = new SimpleListener();
		// 创建用于确定输入信息的“确定”按钮
		JButton okButton = new JButton("确定(Y)");
		okButton.setMnemonic('Y');					// 设置快捷键
		// 设置动作命令的名称，这可用来区分用户到底按了什么按钮
		okButton.setActionCommand("ok");			
		okButton.addActionListener(listener);		// 添加事件监听器
		// 创建用于放弃输入信息的“放弃”按钮
		JButton cancelButton = new JButton("放弃(N)");
		cancelButton.setMnemonic('N');				// 设置快捷键
		// 设置动作命令的名称，这可用来区分用户到底按了什么按钮
		cancelButton.setActionCommand("cancel");			
		cancelButton.addActionListener(listener);	// 添加事件监听器
		// 创建一临时性窗格，将这两个按钮加入到该窗格，该窗格使用流式布局管理
		JPanel tempPanel = new JPanel();
		tempPanel.setLayout(new FlowLayout(FlowLayout.CENTER, 40, 0));
		tempPanel.add(okButton);
		tempPanel.add(cancelButton);
		// 将该临时性窗格加入到基础容器
		place.add(tempPanel);
	}
	
	private class SimpleListener implements ActionListener {
		public void actionPerformed(ActionEvent evt) {
			if (evt.getActionCommand().equals("ok")) closeAndSave();
			else closeAndCancel();
		}
	}
	
	// 用户按确认之后推出对话框，这时要保存所输入的信息到 record 中
	private void closeAndSave() {
		// 按确认之后，输入的信息是有效的，将它们保存到 record 中
		isValidate = true;
		record.id = idField.getText();
		record.name = nameField.getText();
		record.address = addressField.getText();
		record.resume = resumeArea.getText();
		record.sex = maleButton.isSelected() ? "男" : "女";

		String dateString = dateField.getText();
		try {
			record.birthday = Date.valueOf(dateString);
			// 使对话框不可见，就关闭了对话框并退出对话框
			setVisible(false);
		} catch (Exception exc) {
			// 如果输入的日期串不能转换为正确的日期对象，则提示出错，并且让用户重新输入
			// 注意，没有让对话框不可见，就意味着用户可以重新使用对话框进行输入
			JOptionPane.showMessageDialog(this, "输入的出生日期[" + dateString + "]不符合预定格式[yyyy-mm-dd]！");
			exc.printStackTrace();
		}
	}
	
	private void closeAndCancel() {
		// 直接关闭对话框，或按放弃退出对话框，这时直接使对话框不可见即可
		isValidate = false;
		setVisible(false);
	}
}