Java Swing 日历控件

本想在网上找一个简单的Java 日历控件，但是找了很久要不是就很花哨，要不是就写的很复杂。下午加晚上花了几个小时的时间，写了个简易的日历控件。现在放上来，以备不时之需。

 

package date; import java.awt.BorderLayout; import java.awt.Container; import java.awt.Font; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.Calendar; import java.util.GregorianCalendar; import javax.swing.Box; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; public class CalendarPanel extends JFrame { private static final long serialVersionUID = 1L; Calendar cal = null; JPanel operationPanel = null; JPanel dateContainerPanel = null; JButton pMonth = new JButton("<"); JButton nMonth = new JButton(">"); JButton pYear = new JButton("<<"); JButton nYear = new JButton(">>"); JLabel monthLabel = new JLabel(); private int year; private int month; public CalendarPanel() { Calendar cal = Calendar.getInstance(); this.year = cal.get(Calendar.YEAR); this.month = cal.get(Calendar.MONTH); buildJFrame(cal); } public void buildJFrame(Calendar cal) { Container contentPane = getContentPane(); contentPane.add(getOprPanel(), BorderLayout.NORTH); contentPane.add(getPanel(cal), BorderLayout.CENTER); setSize(500, 500); setVisible(true); setLocationRelativeTo(null); setResizable(false); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } public static void main(String args[]) { new CalendarPanel(); } // 操作按钮及月份显示 public JPanel getOprPanel() { if (operationPanel == null) { operationPanel = new JPanel(); } Box hBox = Box.createHorizontalBox(); monthLabel.setText(this.year + "年 " + (this.month + 1) + "月"); hBox.add(pYear); hBox.add(Box.createHorizontalStrut(20)); hBox.add(pMonth); hBox.add(Box.createHorizontalStrut(20)); hBox.add(monthLabel); hBox.add(Box.createHorizontalStrut(20)); hBox.add(nMonth); hBox.add(Box.createHorizontalStrut(20)); hBox.add(nYear); pYear.addActionListener(new previousYear()); nYear.addActionListener(new nextYear()); pMonth.addActionListener(new previousMonth()); nMonth.addActionListener(new nextMonth()); operationPanel.add(hBox); return operationPanel; } // 日期面板生成 public JPanel getPanel(Calendar cal) { if (dateContainerPanel == null) { dateContainerPanel = new JPanel(); } dateContainerPanel.removeAll(); cal.set(Calendar.DAY_OF_MONTH, 1); cal.add(Calendar.MONTH, 1); cal.add(Calendar.DAY_OF_MONTH, -1); int weeks = cal.get(Calendar.WEEK_OF_MONTH); GridLayout grid = new GridLayout(weeks + 1, 7); dateContainerPanel.setLayout(grid); cal.set(Calendar.DAY_OF_MONTH, 1); int weekday = cal.get(Calendar.DAY_OF_WEEK); cal.add(Calendar.DAY_OF_MONTH, 1 - weekday); String[] weekTitle = { "日", "一", "二", "三", "四", "五", "六" }; // 其他月份日期字体 Font hFont = new Font("宋体", 2, 12); for (int i = 0; i < weeks + 1; i++) { for (int j = 0; j < 7; j++) { if (i == 0) { JButton button = new JButton(weekTitle[j]); button.setEnabled(false); dateContainerPanel.add(button); } else { JButton button = new JButton(cal.get(Calendar.DAY_OF_MONTH) + ""); if (cal.get(Calendar.MONTH) != month) { button.setFont(hFont); } dateContainerPanel.add(button); cal.add(Calendar.DAY_OF_MONTH, 1); } } } return dateContainerPanel; } // 向后翻一月 class nextMonth implements ActionListener { public void actionPerformed(ActionEvent e) { Calendar cal = new GregorianCalendar(year, month, 1); cal.add(Calendar.MONTH, 1); year = cal.get(Calendar.YEAR); month = cal.get(Calendar.MONTH); monthLabel.setText(year + "年 " + (month + 1) + "月"); getPanel(cal); } } // 向前翻一月 class previousMonth implements ActionListener { public void actionPerformed(ActionEvent e) { Calendar cal = new GregorianCalendar(year, month, 1); cal.add(Calendar.MONTH, -1); year = cal.get(Calendar.YEAR); month = cal.get(Calendar.MONTH); monthLabel.setText(year + "年 " + (month + 1) + "月"); getPanel(cal); } } // 向后翻一年 class nextYear implements ActionListener { public void actionPerformed(ActionEvent e) { Calendar cal = new GregorianCalendar(year, month, 1); cal.add(Calendar.YEAR, 1); year = cal.get(Calendar.YEAR); month = cal.get(Calendar.MONTH); monthLabel.setText(year + "年 " + (month + 1) + "月"); getPanel(cal); } } // 向前翻一年 class previousYear implements ActionListener { public void actionPerformed(ActionEvent e) { Calendar cal = new GregorianCalendar(year, month, 1); cal.add(Calendar.YEAR, -1); year = cal.get(Calendar.YEAR); month = cal.get(Calendar.MONTH); monthLabel.setText(year + "年 " + (month + 1) + "月"); getPanel(cal); } } }