http://www.matrix.org.cn/blog/liu2liu2
上次公司需要，搞了一个swing的aapplication的demo，重新弄了一般swing，可惜最后无疾而终，可悲.....
最近离职，把以前的东西整理了一下，觉得多少有点用处，写下算是悼念吧！
这是其中日期选择控件的代码，改编自网上某个程序(记不得了)，界面如下所示：
源代码：
//datepicker.java
package com.kxsoft.component;
import java.awt.*;
import java.awt.event.*;
import java.util.gregoriancalendar;
import java.util.date;
import java.util.calendar;
import java.text.dateformat;
import java.text.fieldposition;
import javax.swing.*;
import javax.swing.plaf.borderuiresource;
public final class datepicker extends jpanel {
private static final long serialversionuid = 1l;
private static final int startx = 10;
private static final int starty = 60;
private static final font smallfont = new font("dialog", font.plain, 10);
private static final font largefont = new font("dialog", font.plain, 12);
private static final insets insets = new insets(2, 2, 2, 2);
private static final color highlight = new color(255, 255, 204);
private static final color white = new color(255, 255, 255);
private static final color gray = new color(204, 204, 204);
private component selectedday = null;
private gregoriancalendar selecteddate = null;
private gregoriancalendar originaldate = null;
private boolean hideonselect = true;
private final jbutton backbutton = new jbutton();
private final jlabel monthandyear = new jlabel();
private final jbutton forwardbutton = new jbutton();
private final jlabel[] dayheadings = new jlabel[]{
new jlabel("日"),
new jlabel("一"),
new jlabel("二"),
new jlabel("三"),
new jlabel("四"),
new jlabel("五"),
new jlabel("六")};
private final jlabel[][] daysinmonth = new jlabel[][]{
{new jlabel(),
new jlabel(),
new jlabel(),
new jlabel(),
new jlabel(),
new jlabel(),
new jlabel()},
{new jlabel(),
new jlabel(),
new jlabel(),
new jlabel(),
new jlabel(),
new jlabel(),
new jlabel()},
{new jlabel(),
new jlabel(),
new jlabel(),
new jlabel(),
new jlabel(),
new jlabel(),
new jlabel()},
{new jlabel(),
new jlabel(),
new jlabel(),
new jlabel(),
new jlabel(),
new jlabel(),
new jlabel()},
{new jlabel(),
new jlabel(),
new jlabel(),
new jlabel(),
new jlabel(),
new jlabel(),
new jlabel()},
{new jlabel(),
new jlabel(),
new jlabel(),
new jlabel(),
new jlabel(),
new jlabel(),
new jlabel()}
};
private final jbutton todaybutton = new jbutton();
private final jbutton cancelbutton = new jbutton();
public datepicker() {
super();
selecteddate = gettoday();
init();
}
public datepicker(final date initialdate) {
super();
if (null == initialdate)
selecteddate = gettoday();
else
(selecteddate = new gregoriancalendar()).settime(initialdate);
originaldate = new gregoriancalendar(
selecteddate.get(calendar.year),
selecteddate.get(calendar.month),
selecteddate.get(calendar.date));
init();
}
public boolean ishideonselect() {
return hideonselect;
}
public void sethideonselect(final boolean hideonselect) {
if (this.hideonselect != hideonselect) {
this.hideonselect = hideonselect;
initbuttons(false);
}
}
public date getdate() {
if (null != selecteddate)
return selecteddate.gettime();
return null;
}
private void init() {
setlayout(new absolutelayout());
this.setminimumsize(new dimension(161, 226));
this.setmaximumsize(getminimumsize());
this.setpreferredsize(getminimumsize());
this.setborder(new borderuiresource.etchedborderuiresource());
backbutton.setfont(smallfont);
backbutton.settext("<");
backbutton.setmargin(insets);
backbutton.setdefaultcapable(false);
backbutton.addactionlistener(new actionlistener() {
public void actionperformed(final actionevent evt) {
onbackclicked(evt);
}
});
add(backbutton, new absoluteconstraints(10, 10, 20, 20));
monthandyear.setfont(largefont);
monthandyear.sethorizontalalignment(jtextfield.center);
monthandyear.settext(formatdatetext(selecteddate.gettime()));
add(monthandyear, new absoluteconstraints(30, 10, 100, 20));
forwardbutton.setfont(smallfont);
forwardbutton.settext(">");
forwardbutton.setmargin(insets);
forwardbutton.setdefaultcapable(false);
forwardbutton.addactionlistener(new actionlistener() {
public void actionperformed(final actionevent evt) {
onforwardclicked(evt);
}
});
add(forwardbutton, new absoluteconstraints(130, 10, 20, 20));
int x = startx;
for (int ii = 0; ii < dayheadings.length; ii++) {
dayheadings[ii].setopaque(true);
dayheadings[ii].setbackground(color.light_gray);
dayheadings[ii].setforeground(color.white);
dayheadings[ii].sethorizontalalignment(jlabel.center);
add(dayheadings[ii], new absoluteconstraints(x, 40, 21, 21));
x += 20;
}
x = startx;
int y = starty;
for (int ii = 0; ii < daysinmonth.length; ii++) {
for (int jj = 0; jj < daysinmonth[ii].length; jj++) {
daysinmonth[ii][jj].setopaque(true);
daysinmonth[ii][jj].setbackground(white);
daysinmonth[ii][jj].setfont(smallfont);
daysinmonth[ii][jj].sethorizontalalignment(jlabel.center);
daysinmonth[ii][jj].settext("");
daysinmonth[ii][jj].addmouselistener(new mouseadapter() {
public void mouseclicked(final mouseevent evt) {
ondayclicked(evt);
}
});
add(daysinmonth[ii][jj], new absoluteconstraints(x, y, 21, 21));
x += 20;
}
x = startx;
y += 20;
}
initbuttons(true);
calculatecalendar();
}
private void initbuttons(final boolean firsttime) {
if (firsttime) {
final dimension buttonsize = new dimension(68, 24);
todaybutton.settext("今天");
todaybutton.setmargin(insets);
todaybutton.setmaximumsize(buttonsize);
todaybutton.setminimumsize(buttonsize);
todaybutton.setpreferredsize(buttonsize);
todaybutton.setdefaultcapable(true);
todaybutton.setselected(true);
todaybutton.addactionlistener(new actionlistener() {
public void actionperformed(final actionevent evt) {
ontoday(evt);
}
});
cancelbutton.settext("取消");
cancelbutton.setmargin(insets);
cancelbutton.setmaximumsize(buttonsize);
cancelbutton.setminimumsize(buttonsize);
cancelbutton.setpreferredsize(buttonsize);
cancelbutton.addactionlistener(new actionlistener() {
public void actionperformed(final actionevent evt) {
oncancel(evt);
}
});
} else {
this.remove(todaybutton);
this.remove(cancelbutton);
}
if (hideonselect) {
add(todaybutton, new absoluteconstraints(25, 190, 52, -1));
add(cancelbutton, new absoluteconstraints(87, 190, 52, -1));
} else {
add(todaybutton, new absoluteconstraints(55, 190, 52, -1));
}
}
private void ontoday(final java.awt.event.actionevent evt) {
selecteddate = gettoday();
setvisible(!hideonselect);
if (isvisible()) {
monthandyear.settext(formatdatetext(selecteddate.gettime()));
calculatecalendar();
}
}
private void oncancel(final actionevent evt) {
selecteddate = originaldate;
setvisible(!hideonselect);
}
private void onforwardclicked(final java.awt.event.actionevent evt) {
final int day = selecteddate.get(calendar.date);
selecteddate.set(calendar.date, 1);
selecteddate.add(calendar.month, 1);
selecteddate.set(calendar.date,
math.min(day, calculatedaysinmonth(selecteddate)));
monthandyear.settext(formatdatetext(selecteddate.gettime()));
calculatecalendar();
}
private void onbackclicked(final java.awt.event.actionevent evt) {
final int day = selecteddate.get(calendar.date);
selecteddate.set(calendar.date, 1);
selecteddate.add(calendar.month, -1);
selecteddate.set(calendar.date,
math.min(day, calculatedaysinmonth(selecteddate)));
monthandyear.settext(formatdatetext(selecteddate.gettime()));
calculatecalendar();
}
private void ondayclicked(final java.awt.event.mouseevent evt) {
final javax.swing.jlabel fld = (javax.swing.jlabel) evt.getsource();
if (!"".equals(fld.gettext())) {
fld.setbackground(highlight);
selectedday = fld;
selecteddate.set(
calendar.date,
integer.parseint(fld.gettext()));
setvisible(!hideonselect);
}
}
private static gregoriancalendar gettoday() {
final gregoriancalendar gc = new gregoriancalendar();
gc.set(calendar.hour_of_day, 0);
gc.set(calendar.minute, 0);
gc.set(calendar.second, 0);
gc.set(calendar.millisecond, 0);
return gc;
}
private void calculatecalendar() {
if (null != selectedday) {
selectedday.setbackground(white);
selectedday = null;
}
final gregoriancalendar c = new gregoriancalendar(
selecteddate.get(calendar.year),
selecteddate.get(calendar.month),
1);
final int maxday = calculatedaysinmonth(c);
final int selectedday = math.min(maxday, selecteddate.get(
calendar.date));
int dow = c.get(calendar.day_of_week);
for (int dd = 0; dd < dow; dd++) {
daysinmonth[0][dd].settext("");
}
int week;
do {
week = c.get(calendar.week_of_month);
dow = c.get(calendar.day_of_week);
final jlabel fld = this.daysinmonth[week - 1][dow - 1];
fld.settext(integer.tostring(c.get(calendar.date)));
if (selectedday == c.get(calendar.date)) {
fld.setbackground(highlight);
this.selectedday = fld;
}
if (c.get(calendar.date) >= maxday)
break;
c.add(calendar.date, 1);
} while (c.get(calendar.date) <= maxday);
week--;
for (int ww = week; ww < daysinmonth.length; ww++) {
for (int dd = dow; dd < daysinmonth[ww].length; dd++) {
daysinmonth[ww][dd].settext("");
}
dow = 0;
}
c.set(calendar.date, selectedday);
selecteddate = c;
}
private static int calculatedaysinmonth(final calendar c) {
int daysinmonth = 0;
switch (c.get(calendar.month)) {
case 0:
case 2:
case 4:
case 6:
case 7:
case 9:
case 11:
daysinmonth = 31;
break;
case 3:
case 5:
case 8:
case 10:
daysinmonth = 30;
break;
case 1:
final int year = c.get(calendar.year);
daysinmonth =
(0 == year % 1000) ? 29 :
(0 == year % 100) ? 28 :
(0 == year % 4) ? 29 : 28;
break;
}
return daysinmonth;
}
private static string formatdatetext(final date dt) {
final dateformat df = dateformat.getdateinstance(dateformat.long);
final stringbuffer mm = new stringbuffer();
final stringbuffer yy = new stringbuffer();
final fieldposition mmfp = new fieldposition(dateformat.month_field);
final fieldposition yyfp = new fieldposition(dateformat.year_field);
df.format(dt, mm, mmfp);
df.format(dt, yy, yyfp);
return (mm.tostring().substring(mmfp.getbeginindex(), mmfp.getendindex()) +
"月 " + yy.tostring().substring(yyfp.getbeginindex(), yyfp.getendindex()) + "年");
}
}
</pre>
</code>
<code>
<pre class="js src">
//datafield.java
package com.kxsoft.component;
import java.awt.borderlayout;
import java.awt.color;
import java.awt.insets;
import java.awt.point;
import java.awt.event.actionevent;
import java.awt.event.actionlistener;
import java.awt.event.componentadapter;
import java.awt.event.componentevent;
import java.awt.event.mouseadapter;
import java.awt.event.mouseevent;
import java.awt.event.mousemotionadapter;
import java.net.url;
import java.text.dateformat;
import java.text.parseexception;
import java.util.date;
import javax.swing.imageicon;
import javax.swing.jbutton;
import javax.swing.jdialog;
import javax.swing.jframe;
import javax.swing.jpanel;
import javax.swing.jtextfield;
public final class datefield extends jpanel {
private static final long serialversionuid = 1l;
private final jtextfield datetext = new jtextfield(12);
private final jbutton dropdownbutton = new jbutton();
private datepicker dp;
private jdialog dlg;
point origin = new point();
final class listener extends componentadapter {
public void componenthidden(final componentevent evt) {
final date dt = ((datepicker) evt.getsource()).getdate();
if (null != dt)
datetext.settext(datetostring(dt));
dlg.dispose();
}
}
public datefield() {
super();
init();
}
public datefield(final date initialdate) {
super();
init();
datetext.settext(datetostring(initialdate));
}
public date getdate() {
return stringtodate(datetext.gettext());
}
public void setdate(date date) {
string v = datetostring(date);
if (v == null) {
v = "";
}
datetext.settext(v);
}
private void init() {
setlayout(new borderlayout());
datetext.settext("");
datetext.seteditable(false);
datetext.setbackground(new color(255, 255, 255));
add(datetext, borderlayout.center);
url url = datefield.class.getresource("/com/kxsoft/component/dropdown.gif");
imageicon icon = new imageicon(url);
dropdownbutton.seticon(icon);
dropdownbutton.setmargin(new insets(2, 2, 2, 2));
dropdownbutton.addactionlistener(new actionlistener() {
public void actionperformed(final actionevent evt) {
onbuttonclick(evt);
}
});
add(dropdownbutton, borderlayout.east);
}
private void onbuttonclick(final java.awt.event.actionevent evt) {
if ("".equals(datetext.gettext()))
dp = new datepicker();
else
dp = new datepicker(stringtodate(datetext.gettext()));
dp.addcomponentlistener(new listener());
final point p = datetext.getlocationonscreen();
p.setlocation(p.getx(), p.gety() - 1 + datetext.getsize().getheight());
dlg = new jdialog(new jframe(), true);
dlg.addmouselistener(new mouseadapter() {
public void mousepressed(mouseevent e) {
origin.x = e.getx();
origin.y = e.gety();
}
});
dlg.addmousemotionlistener(new mousemotionadapter() {
public void mousedragged(mouseevent e) {
point p = dlg.getlocation();
dlg.setlocation(p.x + e.getx() - origin.x, p.y + e.gety() - origin.y);
}
});
dlg.setlocation(p);
dlg.setresizable(false);
dlg.setundecorated(true);
dlg.getcontentpane().add(dp);
dlg.pack();
dlg.setvisible(true);
}
private static string datetostring(final date dt) {
if (null != dt)
return dateformat.getdateinstance(dateformat.long).format(dt);
return null;
}
private static date stringtodate(final string s) {
try {
return dateformat.getdateinstance(dateformat.long).parse(s);
} catch (parseexception e) {
return null;
}
}
public static void main(string[] args) {
jdialog dlg = new jdialog(new jframe(), true);
datefield df = new datefield();
dlg.getcontentpane().add(df);
dlg.pack();
dlg.setvisible(true);
system.out.println(df.getdate().tostring());
system.exit(0);
}
}
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