JAVA SWING 日期选择控件(目前支持JLable和JTextField http://zgdeng.iteye.com/blog/1405650

原文  http://zgdeng.iteye.com/blog/1405650

import java.awt.BasicStroke;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridLayout;
import java.awt.Point;
import java.awt.Polygon;
import java.awt.Stroke;
import java.awt.Toolkit;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Comparator;
import java.util.Date;
import java.util.List;
 
import javax.swing.BorderFactory;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.Popup;
import javax.swing.PopupFactory;
import javax.swing.SwingUtilities;
import javax.swing.event.AncestorEvent;
import javax.swing.event.AncestorListener;
 
/** 
 * 日期选择器，可以指定日期的显示格式 
 */
public class DateChooser extends JPanel {
 
private static final long serialVersionUID = 4529266044762990227L;
 
private Date initDate;
private Calendar now = Calendar.getInstance();
private Calendar select;
private JPanel monthPanel;//月历  
private JP1 jp1;//四块面板,组成  
private JP2 jp2;
private JP3 jp3;
private JP4 jp4;
private Font font = new Font("宋体", Font.PLAIN, 12);
private final LabelManager lm = new LabelManager();
private SimpleDateFormat sdf;
private boolean isShow = false;
private Popup pop;
 
private JComponent showDate;
 
public static DateChooser getInstance() {
return new DateChooser();
}
 
public static DateChooser getInstance(Date date) {
return new DateChooser(date);
}
 
public static DateChooser getInstance(String format) {
return new DateChooser(format);
}
 
public static DateChooser getInstance(Date date, String format) {
return new DateChooser(date, format);
}
 
/** 
 * Creates a new instance of DateChooser 
 */
private DateChooser() {
this(new Date());
}
 
private DateChooser(Date date) {
this(date, "yyyy年MM月dd日");
}
 
private DateChooser(String format) {
this(new Date(), format);
}
 
private DateChooser(Date date, String format) {
initDate = date;
sdf = new SimpleDateFormat(format);
select = Calendar.getInstance();
select.setTime(initDate);
initPanel();
}
 
/** 
 * 是否允许用户选择 
 */
public void setEnabled(boolean b) {
super.setEnabled(b);
showDate.setEnabled(b);
}
 
/** 
 *得到当前选择框的日期 
 */
public Date getDate() {
return select.getTime();
}
 
public String getStrDate() {
return sdf.format(select.getTime());
}
 
public String getStrDate(String format) {
sdf = new SimpleDateFormat(format);
return sdf.format(select.getTime());
}
 
//根据初始化的日期,初始化面板  
private void initPanel() {
monthPanel = new JPanel(new BorderLayout());
monthPanel.setBorder(BorderFactory.createLineBorder(Color.BLUE));
JPanel up = new JPanel(new BorderLayout());
up.add(jp1 = new JP1(), BorderLayout.NORTH);
up.add(jp2 = new JP2(), BorderLayout.CENTER);
monthPanel.add(jp3 = new JP3(), BorderLayout.CENTER);
monthPanel.add(up, BorderLayout.NORTH);
monthPanel.add(jp4 = new JP4(), BorderLayout.SOUTH);
this.addAncestorListener(new AncestorListener() {
public void ancestorAdded(AncestorEvent event) {
 
}
 
public void ancestorRemoved(AncestorEvent event) {
 
}
 
//只要祖先组件一移动,马上就让popup消失  
public void ancestorMoved(AncestorEvent event) {
hidePanel();
}
});
}
 
public void register(final JComponent showDate) {
this.showDate = showDate;
 
showDate.setRequestFocusEnabled(true);
showDate.addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent me) {
showDate.requestFocusInWindow();
}
});
this.setBackground(Color.WHITE);
this.add(showDate, BorderLayout.CENTER);
this.setPreferredSize(new Dimension(90, 25));
this.setBorder(BorderFactory.createLineBorder(Color.GRAY));
showDate.addMouseListener(new MouseAdapter() {
public void mouseEntered(MouseEvent me) {
if (showDate.isEnabled()) {
showDate.setCursor(new Cursor(Cursor.HAND_CURSOR));
showDate.setForeground(Color.RED);
}
}
 
public void mouseExited(MouseEvent me) {
if (showDate.isEnabled()) {
showDate.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
showDate.setForeground(Color.BLACK);
}
}
 
public void mousePressed(MouseEvent me) {
if (showDate.isEnabled()) {
showDate.setForeground(Color.CYAN);
if (isShow) {
hidePanel();
} else {
showPanel(showDate);
}
}
}
 
public void mouseReleased(MouseEvent me) {
if (showDate.isEnabled()) {
showDate.setForeground(Color.BLACK);
}
}
});
showDate.addFocusListener(new FocusListener() {
public void focusLost(FocusEvent e) {
hidePanel();
}
 
public void focusGained(FocusEvent e) {
 
}
});
}
 
//根据新的日期刷新  
private void refresh() {
jp1.updateDate();
jp2.updateDate();
jp3.updateDate();
jp4.updateDate();
SwingUtilities.updateComponentTreeUI(this);
}
 
//提交日期  
private void commit() {
//TODO add other components here
if (showDate instanceof JTextField) {
((JTextField) showDate).setText(sdf.format(select.getTime()));
}else if (showDate instanceof JLabel) {
((JLabel) showDate).setText(sdf.format(select.getTime()));
}
 
hidePanel();
}
 
//隐藏日期选择面板  
private void hidePanel() {
if (pop != null) {
isShow = false;
pop.hide();
pop = null;
}
}
 
//显示日期选择面板  
private void showPanel(Component owner) {
if (pop != null) {
pop.hide();
}
Point show = new Point(0, showDate.getHeight());
SwingUtilities.convertPointToScreen(show, showDate);
Dimension size = Toolkit.getDefaultToolkit().getScreenSize();
int x = show.x;
int y = show.y;
if (x < 0) {
x = 0;
}
if (x > size.width - 295) {
x = size.width - 295;
}
if (y < size.height - 170) {
} else {
y -= 188;
}
pop = PopupFactory.getSharedInstance().getPopup(owner, monthPanel, x, y);
pop.show();
isShow = true;
}
 
/** 
 * 最上面的面板用来显示月份的增减 
 */
private class JP1 extends JPanel {
private static final long serialVersionUID = -5638853772805561174L;
JLabel yearleft, yearright, monthleft, monthright, center, centercontainer;
 
public JP1() {
super(new BorderLayout());
this.setBackground(new Color(160, 185, 215));
initJP1();
}
 
private void initJP1() {
yearleft = new JLabel("  <<", JLabel.CENTER);
yearleft.setToolTipText("上一年");
yearright = new JLabel(">>  ", JLabel.CENTER);
yearright.setToolTipText("下一年");
yearleft.setBorder(BorderFactory.createEmptyBorder(2, 0, 0, 0));
yearright.setBorder(BorderFactory.createEmptyBorder(2, 0, 0, 0));
 
monthleft = new JLabel("<", JLabel.RIGHT);
monthleft.setToolTipText("上一月");
monthright = new JLabel(">", JLabel.LEFT);
monthright.setToolTipText("下一月");
monthleft.setBorder(BorderFactory.createEmptyBorder(2, 30, 0, 0));
monthright.setBorder(BorderFactory.createEmptyBorder(2, 0, 0, 30));
 
centercontainer = new JLabel("", JLabel.CENTER);
centercontainer.setLayout(new BorderLayout());
center = new JLabel("", JLabel.CENTER);
 
centercontainer.add(monthleft, BorderLayout.WEST);
centercontainer.add(center, BorderLayout.CENTER);
centercontainer.add(monthright, BorderLayout.EAST);
 
this.add(yearleft, BorderLayout.WEST);
this.add(centercontainer, BorderLayout.CENTER);
this.add(yearright, BorderLayout.EAST);
this.setPreferredSize(new Dimension(295, 25));
 
updateDate();
 
yearleft.addMouseListener(new MouseAdapter() {
public void mouseEntered(MouseEvent me) {
yearleft.setCursor(new Cursor(Cursor.HAND_CURSOR));
yearleft.setForeground(Color.RED);
}
 
public void mouseExited(MouseEvent me) {
yearleft.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
yearleft.setForeground(Color.BLACK);
}
 
public void mousePressed(MouseEvent me) {
select.add(Calendar.YEAR, -1);
yearleft.setForeground(Color.WHITE);
refresh();
}
 
public void mouseReleased(MouseEvent me) {
yearleft.setForeground(Color.BLACK);
}
});
yearright.addMouseListener(new MouseAdapter() {
public void mouseEntered(MouseEvent me) {
yearright.setCursor(new Cursor(Cursor.HAND_CURSOR));
yearright.setForeground(Color.RED);
}
 
public void mouseExited(MouseEvent me) {
yearright.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
yearright.setForeground(Color.BLACK);
}
 
public void mousePressed(MouseEvent me) {
select.add(Calendar.YEAR, 1);
yearright.setForeground(Color.WHITE);
refresh();
}
 
public void mouseReleased(MouseEvent me) {
yearright.setForeground(Color.BLACK);
}
});
monthleft.addMouseListener(new MouseAdapter() {
public void mouseEntered(MouseEvent me) {
monthleft.setCursor(new Cursor(Cursor.HAND_CURSOR));
monthleft.setForeground(Color.RED);
}
 
public void mouseExited(MouseEvent me) {
monthleft.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
monthleft.setForeground(Color.BLACK);
}
 
public void mousePressed(MouseEvent me) {
select.add(Calendar.MONTH, -1);
monthleft.setForeground(Color.WHITE);
refresh();
}
 
public void mouseReleased(MouseEvent me) {
monthleft.setForeground(Color.BLACK);
}
});
monthright.addMouseListener(new MouseAdapter() {
public void mouseEntered(MouseEvent me) {
monthright.setCursor(new Cursor(Cursor.HAND_CURSOR));
monthright.setForeground(Color.RED);
}
 
public void mouseExited(MouseEvent me) {
monthright.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
monthright.setForeground(Color.BLACK);
}
 
public void mousePressed(MouseEvent me) {
select.add(Calendar.MONTH, 1);
monthright.setForeground(Color.WHITE);
refresh();
}
 
public void mouseReleased(MouseEvent me) {
monthright.setForeground(Color.BLACK);
}
});
}
 
private void updateDate() {
center.setText(select.get(Calendar.YEAR) + "年" + (select.get(Calendar.MONTH) + 1) + "月");
}
}
 
private class JP2 extends JPanel {
private static final long serialVersionUID = -8176264838786175724L;
 
public JP2() {
this.setPreferredSize(new Dimension(295, 20));
}
 
protected void paintComponent(Graphics g) {
g.setFont(font);
g.drawString("日 一 二 三 四 五 六", 5, 10);
g.drawLine(0, 15, getWidth(), 15);
}
 
private void updateDate() {
 
}
}
 
private class JP3 extends JPanel {
private static final long serialVersionUID = 43157272447522985L;
 
public JP3() {
super(new GridLayout(6, 7));
this.setPreferredSize(new Dimension(295, 100));
initJP3();
}
 
private void initJP3() {
updateDate();
}
 
public void updateDate() {
this.removeAll();
lm.clear();
Date temp = select.getTime();
Calendar select = Calendar.getInstance();
select.setTime(temp);
select.set(Calendar.DAY_OF_MONTH, 1);
int index = select.get(Calendar.DAY_OF_WEEK);
int sum = (index == 1 ? 8 : index);
select.add(Calendar.DAY_OF_MONTH, 0 - sum);
for (int i = 0; i < 42; i++) {
select.add(Calendar.DAY_OF_MONTH, 1);
lm.addLabel(new MyLabel(select.get(Calendar.YEAR), select.get(Calendar.MONTH), select.get(Calendar.DAY_OF_MONTH)));
}
for (MyLabel my : lm.getLabels()) {
this.add(my);
}
select.setTime(temp);
}
}
 
private class MyLabel extends JLabel implements Comparator<MyLabel>, MouseListener, MouseMotionListener {
private static final long serialVersionUID = 3668734399227577214L;
private int year, month, day;
private boolean isSelected;
 
public MyLabel(int year, int month, int day) {
super("" + day, JLabel.CENTER);
this.year = year;
this.day = day;
this.month = month;
this.addMouseListener(this);
this.addMouseMotionListener(this);
this.setFont(font);
if (month == select.get(Calendar.MONTH)) {
this.setForeground(Color.BLACK);
} else {
this.setForeground(Color.LIGHT_GRAY);
}
if (day == select.get(Calendar.DAY_OF_MONTH)) {
this.setBackground(new Color(160, 185, 215));
} else {
this.setBackground(Color.WHITE);
}
}
 
public boolean getIsSelected() {
return isSelected;
}
 
public void setSelected(boolean b, boolean isDrag) {
isSelected = b;
if (b && !isDrag) {
int temp = select.get(Calendar.MONTH);
select.set(year, month, day);
if (temp == month) {
SwingUtilities.updateComponentTreeUI(jp3);
} else {
refresh();
}
}
this.repaint();
}
 
protected void paintComponent(Graphics g) {
if (day == select.get(Calendar.DAY_OF_MONTH) && month == select.get(Calendar.MONTH)) {
//如果当前日期是选择日期,则高亮显示  
g.setColor(new Color(160, 185, 215));
g.fillRect(0, 0, getWidth(), getHeight());
}
if (year == now.get(Calendar.YEAR) && month == now.get(Calendar.MONTH) && day == now.get(Calendar.DAY_OF_MONTH)) {
//如果日期和当前日期一样,则用红框  
Graphics2D gd = (Graphics2D) g;
gd.setColor(Color.RED);
Polygon p = new Polygon();
p.addPoint(0, 0);
p.addPoint(getWidth() - 1, 0);
p.addPoint(getWidth() - 1, getHeight() - 1);
p.addPoint(0, getHeight() - 1);
gd.drawPolygon(p);
}
if (isSelected) {//如果被选中了就画出一个虚线框出来  
Stroke s = new BasicStroke(1.0f, BasicStroke.CAP_SQUARE, BasicStroke.JOIN_BEVEL, 1.0f, new float[] { 2.0f, 2.0f }, 1.0f);
Graphics2D gd = (Graphics2D) g;
gd.setStroke(s);
gd.setColor(Color.BLACK);
Polygon p = new Polygon();
p.addPoint(0, 0);
p.addPoint(getWidth() - 1, 0);
p.addPoint(getWidth() - 1, getHeight() - 1);
p.addPoint(0, getHeight() - 1);
gd.drawPolygon(p);
}
super.paintComponent(g);
}
 
public boolean contains(Point p) {
return this.getBounds().contains(p);
}
 
private void update() {
repaint();
}
 
public void mouseClicked(MouseEvent e) {
}
 
public void mousePressed(MouseEvent e) {
isSelected = true;
update();
}
 
public void mouseReleased(MouseEvent e) {
Point p = SwingUtilities.convertPoint(this, e.getPoint(), jp3);
lm.setSelect(p, false);
commit();
}
 
public void mouseEntered(MouseEvent e) {
}
 
public void mouseExited(MouseEvent e) {
}
 
public void mouseDragged(MouseEvent e) {
Point p = SwingUtilities.convertPoint(this, e.getPoint(), jp3);
lm.setSelect(p, true);
}
 
public void mouseMoved(MouseEvent e) {
}
 
public int compare(MyLabel o1, MyLabel o2) {
Calendar c1 = Calendar.getInstance();
c1.set(o1.year, o2.month, o1.day);
Calendar c2 = Calendar.getInstance();
c2.set(o2.year, o2.month, o2.day);
return c1.compareTo(c2);
}
}
 
private class LabelManager {
private List<MyLabel> list;
 
public LabelManager() {
list = new ArrayList<MyLabel>();
}
 
public List<MyLabel> getLabels() {
return list;
}
 
public void addLabel(MyLabel my) {
list.add(my);
}
 
public void clear() {
list.clear();
}
 
@SuppressWarnings("unused")
public void setSelect(MyLabel my, boolean b) {
for (MyLabel m : list) {
if (m.equals(my)) {
m.setSelected(true, b);
} else {
m.setSelected(false, b);
}
}
}
 
public void setSelect(Point p, boolean b) {
//如果是拖动,则要优化一下,以提高效率  
if (b) {
//表示是否能返回,不用比较完所有的标签,能返回的标志就是把上一个标签和  
//将要显示的标签找到了就可以了  
boolean findPrevious = false, findNext = false;
for (MyLabel m : list) {
if (m.contains(p)) {
findNext = true;
if (m.getIsSelected()) {
findPrevious = true;
} else {
m.setSelected(true, b);
}
} else if (m.getIsSelected()) {
findPrevious = true;
m.setSelected(false, b);
}
if (findPrevious && findNext) {
return;
}
}
} else {
MyLabel temp = null;
for (MyLabel m : list) {
if (m.contains(p)) {
temp = m;
} else if (m.getIsSelected()) {
m.setSelected(false, b);
}
}
if (temp != null) {
temp.setSelected(true, b);
}
}
}
 
}
 
private class JP4 extends JPanel {
private static final long serialVersionUID = -6391305687575714469L;
 
public JP4() {
super(new BorderLayout());
this.setPreferredSize(new Dimension(295, 20));
this.setBackground(new Color(160, 185, 215));
SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日");
final JLabel jl = new JLabel("今天: " + sdf.format(new Date()));
jl.setToolTipText("点击选择今天日期");
this.add(jl, BorderLayout.CENTER);
jl.addMouseListener(new MouseAdapter() {
public void mouseEntered(MouseEvent me) {
jl.setCursor(new Cursor(Cursor.HAND_CURSOR));
jl.setForeground(Color.RED);
}
 
public void mouseExited(MouseEvent me) {
jl.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
jl.setForeground(Color.BLACK);
}
 
public void mousePressed(MouseEvent me) {
jl.setForeground(Color.WHITE);
select.setTime(new Date());
refresh();
commit();
}
 
public void mouseReleased(MouseEvent me) {
jl.setForeground(Color.BLACK);
}
});
}
 
private void updateDate() {
 
}
}
 
public static void main(String[] args) {
DateChooser dateChooser1 = DateChooser.getInstance("yyyy-MM-dd");
DateChooser dateChooser2 = DateChooser.getInstance("yyyy-MM-dd");
JTextField showDate1 = new JTextField("单击选择日期");
JLabel showDate2 = new JLabel("单击选择日期");
 
dateChooser1.register(showDate1);
dateChooser2.register(showDate2);
 
JFrame jf = new JFrame("测试日期选择器");
jf.add(showDate1, BorderLayout.NORTH);
jf.add(showDate2, BorderLayout.SOUTH);
jf.pack();
jf.setLocationRelativeTo(null);
jf.setVisible(true);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}