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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;
}
}
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原文地址：http://my.oschina.net/abian/blog/497331
