Swing日期选择器 采用触发事件的方式,这样的话,就可以将DateChooser添加到任何组件之上, 任何组件都可以捕获日期选择的事件,然后进行相应处理

1. 如何对事件进行管理,可以查看这个 http://my.oschina.net/abian/blog/497296

截图:

package unit;     import java.awt.BorderLayout;  import java.awt.Color;  import java.awt.Dimension;  import java.awt.Font;  import java.awt.GridLayout;  import java.awt.event.ActionEvent;  import java.awt.event.ActionListener;  import java.text.SimpleDateFormat;  import java.util.Calendar;  import java.util.EventListener;  import java.util.GregorianCalendar;  import javax.swing.BorderFactory;  import javax.swing.Box;  import javax.swing.JButton;  import javax.swing.JComboBox;  import javax.swing.JFrame;  import javax.swing.JLabel;  import javax.swing.JPanel;  import javax.swing.SwingConstants;  import javax.swing.event.EventListenerList;     /**   * 日期选择器 采用触发事件的方式,这样的话,就可以将DateChooser添加到任何组件之上,   * 任何组件都可以捕获日期选择的事件,然后进行相应处理   *    * @author changwen   * @date Aug 26, 2015   */     @SuppressWarnings("all")  public class DateChooser extends JPanel {         protected Color weekBackgroundColor = new Color(189, 235, 238);      protected Color weekendBtnFontColor = new Color(240, 64, 64); // color      protected Color selectedColor = weekBackgroundColor;      protected Font labelFont = new Font("Arial", Font.PLAIN, 10);      protected Color defaultBtnFontColor = Color.BLACK;      protected Color defaultBtnBackgroundColor = Color.WHITE;      private Calendar cal = null;      private Calendar todayCal = null;      private int year;      private int month;      private int day;      private JPanel controllPanel = null;      private JPanel dateContainerPanel = null;      private JLabel todayLabel = null;      protected DateButton[][] buttonDays = null;      public JComboBox monthChoice;      public JComboBox yearChoice;      protected String[] weekTitle = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };      protected int[] months = new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 };      private EventListenerList actionListenerList = new EventListenerList();         public DateChooser() {          buttonDays = new DateButton[6][7];          cal = Calendar.getInstance();          todayCal = Calendar.getInstance();          this.year = cal.get(Calendar.YEAR);          this.month = cal.get(Calendar.MONTH);          this.day = cal.get(Calendar.DATE);          JPanel oprPanel = createControlPanel();          this.setLayout(new BorderLayout(0, 0));          dateContainerPanel = new JPanel();          createDayPanel(cal);          setActiveDay(day);          this.add(oprPanel, BorderLayout.NORTH);          this.add(dateContainerPanel, BorderLayout.CENTER);         }         @SuppressWarnings("all")      public JPanel createControlPanel() {          controllPanel = new JPanel();          controllPanel.setBackground(Color.WHITE);          Box hBox = Box.createHorizontalBox();          String strToday = formatDate(todayCal);          todayLabel = new JLabel(strToday);          monthChoice = new JComboBox();          for (int i = 0; i < months.length; i++) {              monthChoice.addItem(months[i]);          }             monthChoice.setSelectedItem(months[month]);          monthChoice.setPreferredSize(new Dimension(monthChoice.getPreferredSize().width,                  monthChoice.getPreferredSize().height));             monthChoice.addActionListener(new ActionListener() {              public void actionPerformed(ActionEvent ae) {                  int i = monthChoice.getSelectedIndex();                  if (i >= 0) {                      month = i;                      Calendar cal = new GregorianCalendar(year, month, 1);                      year = cal.get(Calendar.YEAR);                      month = cal.get(Calendar.MONTH);                      createDayPanel(cal);                  }              }          });          int currentYear = todayCal.get(Calendar.YEAR);          final int gapYears = 10;          yearChoice = new JComboBox();          for (int i = currentYear - gapYears; i < currentYear + gapYears; i++) {              yearChoice.addItem(i);          }             yearChoice.setSelectedIndex(gapYears);          yearChoice.setPreferredSize(new Dimension(yearChoice.getPreferredSize().width,                  yearChoice.getPreferredSize().height));             yearChoice.addActionListener(new ActionListener() {              public void actionPerformed(ActionEvent ae) {                  System.out.println(yearChoice.getSelectedIndex());                  if (yearChoice.getSelectedIndex() != gapYears) {                      Integer selYear = (Integer) yearChoice.getSelectedItem();                      Calendar cal = new GregorianCalendar(year, month, 1);                      cal.set(Calendar.YEAR, selYear);                      year = cal.get(Calendar.YEAR);                      month = cal.get(Calendar.MONTH);                      createDayPanel(cal);                  }              }          });             hBox.add(todayLabel);          hBox.add(Box.createHorizontalStrut(5));          hBox.add(monthChoice);          hBox.add(Box.createHorizontalStrut(8));          hBox.add(yearChoice);          hBox.add(Box.createHorizontalStrut(8));             controllPanel.add(hBox, BorderLayout.NORTH);          return controllPanel;         }         /**       * 创建日期组件       *        * @param cal       *            void       */      public void createDayPanel(Calendar cal) {          dateContainerPanel.removeAll();          dateContainerPanel.revalidate();          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(7, 7, 0, 0);          dateContainerPanel.setLayout(grid);          cal.set(Calendar.DAY_OF_MONTH, 1);          int weekday = cal.get(Calendar.DAY_OF_WEEK);          System.out.println("weekday+" + weekday);          cal.add(Calendar.DAY_OF_MONTH, 1 - weekday);          System.out.println("Calendar.DAY_OF_MONTH=" + cal.get(Calendar.DAY_OF_MONTH));             for (int i = 0; i < 7; i++) {              JLabel weekLabel = new JLabel(weekTitle[i], SwingConstants.CENTER);              weekLabel.setFont(labelFont);              weekLabel.setOpaque(true);              weekLabel.setBackground(weekBackgroundColor);              dateContainerPanel.add(weekLabel);          }          DayButtonActionListener dayButtonActionListener = new DayButtonActionListener();             for (int i = 0; i < 6; i++) {              for (int j = 0; j < 7; j++) {                  int curMonth = cal.get(Calendar.MONTH);                  DateButton button = null;                  if (curMonth != month) {                      button = new DateButton(" ");                      button.setEnabled(false);                      button.setBackground(defaultBtnBackgroundColor);                  } else {                      int currentDay = cal.get(Calendar.DAY_OF_MONTH);                      button = new DateButton(currentDay + "");                      button.setHorizontalTextPosition(SwingConstants.RIGHT);                      button.setFont(labelFont);                      button.setBackground(defaultBtnBackgroundColor);                      button.setSelectedBackground(weekBackgroundColor);                      if (currentDay == todayCal.get(Calendar.DAY_OF_MONTH) && month == todayCal.get(Calendar.MONTH)                              && year == todayCal.get(Calendar.YEAR)) {                          button.setBorder(BorderFactory.createLineBorder(weekendBtnFontColor));                      }                      if (cal.get(Calendar.MONTH) != month) {                          button.setForeground(Color.BLUE);                      }                      if (j == 0 || j == 6) {                          button.setForeground(weekendBtnFontColor);                      } else {                          button.setForeground(defaultBtnFontColor);                      }                     }                  button.addActionListener(dayButtonActionListener);                  buttonDays[i][j] = button;                  dateContainerPanel.add(buttonDays[i][j]);                  cal.add(Calendar.DAY_OF_MONTH, 1);              }          }         }         /**       * 选中莫一天       *        * @param selectedDay       *            void       */      public void setActiveDay(int selectedDay) {          clearAllActiveDay();          if (selectedDay <= 0) {              day = new GregorianCalendar().get(Calendar.DAY_OF_MONTH);          } else {              day = selectedDay;          }          int leadGap = new GregorianCalendar(year, month, 1).get(Calendar.DAY_OF_WEEK) - 1;          JButton selectedButton = buttonDays[(leadGap + selectedDay - 1) / 7][(leadGap + selectedDay - 1) % 7];          selectedButton.setBackground(weekBackgroundColor);      }         /**       * 清除所有选择的日期       *        */      public void clearAllActiveDay() {          for (int i = 0; i < 6; i++) {              for (int j = 0; j < 7; j++) {                  JButton button = buttonDays[i][j];                  if (button.getText() != null && button.getText().trim().length() > 0) {                      button.setBackground(defaultBtnBackgroundColor);                      button.revalidate();                  }              }             }      }         /**       * 获取选中的日期       *        * @return String       */      public String getSelectedDate() {          Calendar cal = new GregorianCalendar(year, month, day);          return formatDate(cal);      }         private String formatDate(Calendar cal) {          String pattern = "MM-dd-yyyy";          SimpleDateFormat dateFormat = new SimpleDateFormat(pattern);          return dateFormat.format(cal.getTime());      }         class DayButtonActionListener implements ActionListener {          public void actionPerformed(ActionEvent e) {              JButton button = (JButton) e.getSource();              if (button.getText() != null && button.getText().trim().length() > 0) {                  day = Integer.parseInt(button.getText());                  setActiveDay(day);                  fireActionPerformed(e);// fire button click event                  /**                   * 采用触发事件的方式,这样的话,就可以将DateChooser添加到任何组件之上,                   * 任何组件都可以捕获日期选择的事件,然后进行相应处理                   */              }          }      }         public void addActionListener(ActionListener actionListener) {          actionListenerList.add(ActionListener.class, actionListener);      }         public void removeActionListener(ActionListener actionListener) {          actionListenerList.remove(ActionListener.class, actionListener);      }         /**       * 事件管理,触发事件       *        * @param actionEvent       *            void       */      protected void fireActionPerformed(ActionEvent actionEvent) {          EventListener listenerList[] = actionListenerList.getListeners(ActionListener.class);          for (int i = 0, n = listenerList.length; i < n; i++) {              ((ActionListener) listenerList[i]).actionPerformed(actionEvent);          }      }         public static void main(String[] args) {             JFrame frame = new JFrame("xxxxxx");          frame.setSize(400, 300);             final DateChooser datePicker = new DateChooser();          datePicker.addActionListener(new ActionListener() {// 事件捕获                         public void actionPerformed(ActionEvent e) {                          System.out.println(datePicker.getSelectedDate());                         }                  });          frame.getContentPane().add(datePicker);             frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);          frame.setLocationRelativeTo(null);          frame.setVisible(true);         }     }     //-------自定义按钮--------------  package unit;     import java.awt.Color;  import java.awt.Cursor;  import java.awt.Graphics;  import java.awt.Graphics2D;  import java.awt.Paint;  import java.awt.RenderingHints;     import javax.swing.Action;  import javax.swing.BorderFactory;  import javax.swing.Icon;  import javax.swing.JButton;     public class DateButton extends JButton {      private static final long serialVersionUID = 1L;      protected Color normalBackground;      protected Color selectedBackground;      public DateButton() {          initAttributes();      }         public DateButton(Icon icon) {          super(icon);          initAttributes();      }         public DateButton(String text, Icon icon) {          super(text, icon);          initAttributes();      }         public DateButton(String text) {          super(text);          initAttributes();      }         public DateButton(Action a) {          super(a);          initAttributes();      }         public void initAttributes() {          setRolloverEnabled(true);          setBorder(BorderFactory.createEmptyBorder());          setContentAreaFilled(false);          setFocusPainted(false);          setNormalBackground(new Color(216, 216, 216));          setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));      }         @Override      public void paint(Graphics g) {                     Graphics2D g2d = (Graphics2D) g;          g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);             Paint oldPaint = g2d.getPaint();                     if ((getModel().isSelected() || getModel().isPressed()) && selectedBackground != null) {              g2d.setPaint(selectedBackground);              g2d.fillRect(0, 0, getWidth(), getHeight());          } else if (getNormalBackground() != null) {              g2d.setPaint(getNormalBackground());              g2d.fillRect(0, 0, getWidth(), getHeight());          }          g2d.setPaint(oldPaint);          super.paint(g2d);         }         public void clearDefaultAttribute() {          setNormalBackground(null);      }         @Override      public void setBackground(Color bg) {          super.setBackground(bg);          normalBackground = bg;      }         public Color getNormalBackground() {          return normalBackground;      }         public void setNormalBackground(Color normalBackground) {          super.setBackground(normalBackground);          this.normalBackground = normalBackground;      }                   public void setSelectedBackground(Color selectedBackground) {          this.selectedBackground = selectedBackground;      }     }