Question

JAVA日历代码，怎么做？

我现在要做的一个日历，是这样的，要求和网上的一些日历形式一样，是直接可以显示在桌面上的，并且，在日期的格子中可以输入信息，比如当天工作日志之类的，还要把这些工作日志保存到数据库中去。
这个需要怎么做？用什么办法写好点？我用JAVA的，开发的工具是eclipse。
现在，我自己有两个办法：
1、一个就是用了java.awt和javax.swing的，应该是叫JAVA桌面应用程序吧。日历是能做出来，但是不知道是否能够实现我要输入信息并存到数据库的功能？可以的话，说下怎么搞？
2、就是用JSP做页面，然后ACTION控制，数据的输入和存储到是可以。但是这里做的时候，那些日期在日历中天数的判断之类应该是写在ACTION中，不过JSP页面只有一个，打开的时候，怎么进的ACTION。。。还是有什么其他的问题？不明白，现在有点迷茫。
3、或者就是说用其他的办法。
大家帮帮忙啊！多说点想法，唉，第一次搞这种东西。郁闷了！谢谢
有现成的仁兄，给个地址吧。没看到一样的，请看下我需要的功能，谢谢。

Answer 1

import java.util.Date;
import java.util.Calendar;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.text.ParseException;
import java.awt.Color;
import java.awt.Font;
import java.awt.Point;
import java.awt.Dimension;
import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.Cursor;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JPanel;
import javax.swing.JLabel;
import javax.swing.JSpinner;
import javax.swing.SpinnerNumberModel;
import javax.swing.SwingUtilities;
import javax.swing.SwingConstants;
import javax.swing.event.ChangeListener;
import javax.swing.event.ChangeEvent;
import javax.swing.border.LineBorder;

/**

* @company:NEUSOFT
* @Title:日期选择控件
* @Description:在原有基础上修改了以下内容：
* 1. 将容器由Frame改为了Dialog，以便在基于对话框的程序中也能够使用
* 2. 将最小日期由1980改为了1950，考虑到目前球员的出生日期可能早于1980年
* 3. 将初始显示格式设置为 yyyy年MM月dd日 格式，原有的小时去掉了，不适合于出生日期字段
*/
public class DateChooserJButton extends JButton {

private DateChooser dateChooser = null;

private String preLabel = "";

public DateChooserJButton() {
this(getNowDate());
}

public DateChooserJButton(SimpleDateFormat df, String dateString) {
this();
setText(df, dateString);
}

public DateChooserJButton(Date date) {
this("", date);
}

public DateChooserJButton(String preLabel, Date date) {
if (preLabel != null)
this.preLabel = preLabel;
setDate(date);
setBorder(null);
setCursor(new Cursor(Cursor.HAND_CURSOR));
addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (dateChooser == null)
dateChooser = new DateChooser();
Point p = getLocationOnScreen();
p.y = p.y + 30;
dateChooser.showDateChooser(p);
}
});
}

private static Date getNowDate() {
return Calendar.getInstance().getTime();
}

private static SimpleDateFormat getDefaultDateFormat() {
return new SimpleDateFormat("yyyy年MM月dd日");
}

// 覆盖父类的方法
public void setText(String s) {
Date date;
try {
date = getDefaultDateFormat().parse(s);
} catch (ParseException e) {
date = getNowDate();
}
setDate(date);
}

public void setText(SimpleDateFormat df, String s) {
Date date;
try {
date = df.parse(s);
} catch (ParseException e) {
date = getNowDate();
}
setDate(date);
}

public void setDate(Date date) {
super.setText(preLabel + getDefaultDateFormat().format(date));
}

public Date getDate() {
String dateString = this.getText().substring(preLabel.length());
try {
return getDefaultDateFormat().parse(dateString);
} catch (ParseException e) {
return getNowDate();
}

}

public String getDateString()
{
Date birth =getDate();
DateFormat formatDate = new SimpleDateFormat("yyyy-MM-dd");
return formatDate.format(birth).toString();

//return this.getText().substring(preLabel.length());
}

// 覆盖父类的方法使之无效
//public void addActionListener(ActionListener listener) {
//}

private class DateChooser extends JPanel implements ActionListener,
ChangeListener {
int startYear = 1950; // 默认【最小】显示年份

int lastYear = 2050; // 默认【最大】显示年份

int width = 200; // 界面宽度

int height = 200; // 界面高度

Color backGroundColor = Color.gray; // 底色
// 月历表格配色----------------//

Color palletTableColor = Color.white; // 日历表底色

Color todayBackColor = Color.orange; // 今天背景色

Color weekFontColor = Color.blue; // 星期文字色

Color dateFontColor = Color.black; // 日期文字色

Color weekendFontColor = Color.red; // 周末文字色

// 控制条配色------------------//
Color controlLineColor = Color.pink; // 控制条底色

Color controlTextColor = Color.white; // 控制条标签文字色

Color rbFontColor = Color.white; // RoundBox文字色

Color rbBorderColor = Color.red; // RoundBox边框色

Color rbButtonColor = Color.pink; // RoundBox按钮色

Color rbBtFontColor = Color.red; // RoundBox按钮文字色

JDialog dialog;

JSpinner yearSpin;

JSpinner monthSpin;

JSpinner hourSpin;

JButton[][] daysButton = new JButton[6][7];

DateChooser() {

setLayout(new BorderLayout());
setBorder(new LineBorder(backGroundColor, 2));
setBackground(backGroundColor);

JPanel topYearAndMonth = createYearAndMonthPanal();
add(topYearAndMonth, BorderLayout.NORTH);
JPanel centerWeekAndDay = createWeekAndDayPanal();
add(centerWeekAndDay, BorderLayout.CENTER);

}

private JPanel createYearAndMonthPanal() {
Calendar c = getCalendar();
int currentYear = c.get(Calendar.YEAR);
int currentMonth = c.get(Calendar.MONTH) + 1;
int currentHour = c.get(Calendar.HOUR_OF_DAY);

JPanel result = new JPanel();
result.setLayout(new FlowLayout());
result.setBackground(controlLineColor);

yearSpin = new JSpinner(new SpinnerNumberModel(currentYear,
startYear, lastYear, 1));
yearSpin.setPreferredSize(new Dimension(48, 20));
yearSpin.setName("Year");
yearSpin.setEditor(new JSpinner.NumberEditor(yearSpin, "####"));
yearSpin.addChangeListener(this);
result.add(yearSpin);

JLabel yearLabel = new JLabel("年");
yearLabel.setForeground(controlTextColor);
result.add(yearLabel);

monthSpin = new JSpinner(new SpinnerNumberModel(currentMonth, 1,
12, 1));
monthSpin.setPreferredSize(new Dimension(35, 20));
monthSpin.setName("Month");
monthSpin.addChangeListener(this);
result.add(monthSpin);

JLabel monthLabel = new JLabel("月");
monthLabel.setForeground(controlTextColor);
result.add(monthLabel);

hourSpin = new JSpinner(new SpinnerNumberModel(currentHour, 0, 23,
1));
hourSpin.setPreferredSize(new Dimension(35, 20));
hourSpin.setName("Hour");
hourSpin.addChangeListener(this);
result.add(hourSpin);

JLabel hourLabel = new JLabel("时");
hourLabel.setForeground(controlTextColor);
result.add(hourLabel);

return result;
}

private JPanel createWeekAndDayPanal() {
String colname[] = { "日", "一", "二", "三", "四", "五", "六" };
JPanel result = new JPanel();
// 设置固定字体，以免调用环境改变影响界面美观
result.setFont(new Font("宋体", Font.PLAIN, 12));
result.setLayout(new GridLayout(7, 7));
result.setBackground(Color.white);
JLabel cell;

for (int i = 0; i < 7; i++) {
cell = new JLabel(colname[i]);
cell.setHorizontalAlignment(JLabel.RIGHT);
if (i == 0 || i == 6)
cell.setForeground(weekendFontColor);
else
cell.setForeground(weekFontColor);
result.add(cell);
}

int actionCommandId = 0;
for (int i = 0; i < 6; i++)
for (int j = 0; j < 7; j++) {
JButton numberButton = new JButton();
numberButton.setBorder(null);
numberButton.setHorizontalAlignment(SwingConstants.RIGHT);
numberButton.setActionCommand(String
.valueOf(actionCommandId));
numberButton.addActionListener(this);
numberButton.setBackground(palletTableColor);
numberButton.setForeground(dateFontColor);
if (j == 0 || j == 6)
numberButton.setForeground(weekendFontColor);
else
numberButton.setForeground(dateFontColor);
daysButton[i][j] = numberButton;
result.add(numberButton);
actionCommandId++;
}

return result;
}

private JDialog createDialog(JDialog owner) {
JDialog result = new JDialog(owner, "日期时间选择", true);
result.setDefaultCloseOperation(JDialog.HIDE_ON_CLOSE);
result.getContentPane().add(this, BorderLayout.CENTER);
result.pack();
result.setSize(width, height);
return result;
}

void showDateChooser(Point position) {
JDialog owner = (JDialog) SwingUtilities
.getWindowAncestor(DateChooserJButton.this);
if (dialog == null || dialog.getOwner() != owner)
dialog = createDialog(owner);
dialog.setLocation(getAppropriateLocation(owner, position));
flushWeekAndDay();
dialog.setVisible(true);
}

Point getAppropriateLocation(JDialog owner, Point position) {
Point result = new Point(position);
Point p = owner.getLocation();
int offsetX = (position.x + width) - (p.x + owner.getWidth());
int offsetY = (position.y + height) - (p.y + owner.getHeight());

if (offsetX > 0) {
result.x -= offsetX;
}

if (offsetY > 0) {
result.y -= offsetY;
}

return result;

}

private Calendar getCalendar() {
Calendar result = Calendar.getInstance();
result.setTime(getDate());
return result;
}

private int getSelectedYear() {
return ((Integer) yearSpin.getValue()).intValue();
}

private int getSelectedMonth() {
return ((Integer) monthSpin.getValue()).intValue();
}

private int getSelectedHour() {
return ((Integer) hourSpin.getValue()).intValue();
}

private void dayColorUpdate(boolean isOldDay) {
Calendar c = getCalendar();
int day = c.get(Calendar.DAY_OF_MONTH);
c.set(Calendar.DAY_OF_MONTH, 1);
int actionCommandId = day - 2 + c.get(Calendar.DAY_OF_WEEK);
int i = actionCommandId / 7;
int j = actionCommandId % 7;
if (isOldDay)
daysButton[i][j].setForeground(dateFontColor);
else
daysButton[i][j].setForeground(todayBackColor);
}

private void flushWeekAndDay() {
Calendar c = getCalendar();
c.set(Calendar.DAY_OF_MONTH, 1);
int maxDayNo = c.getActualMaximum(Calendar.DAY_OF_MONTH);
int dayNo = 2 - c.get(Calendar.DAY_OF_WEEK);
for (int i = 0; i < 6; i++) {
for (int j = 0; j < 7; j++) {
String s = "";
if (dayNo >= 1 && dayNo <= maxDayNo)
s = String.valueOf(dayNo);
daysButton[i][j].setText(s);
dayNo++;
}
}
dayColorUpdate(false);
}

public void stateChanged(ChangeEvent e) {
JSpinner source = (JSpinner) e.getSource();
Calendar c = getCalendar();
if (source.getName().equals("Hour")) {
c.set(Calendar.HOUR_OF_DAY, getSelectedHour());
setDate(c.getTime());
return;
}

dayColorUpdate(true);

if (source.getName().equals("Year"))
c.set(Calendar.YEAR, getSelectedYear());
else
// (source.getName().equals("Month"))
c.set(Calendar.MONTH, getSelectedMonth() - 1);
setDate(c.getTime());
flushWeekAndDay();
}

public void actionPerformed(ActionEvent e) {
JButton source = (JButton) e.getSource();
if (source.getText().length() == 0)
return;
dayColorUpdate(true);
source.setForeground(todayBackColor);
int newDay = Integer.parseInt(source.getText());
Calendar c = getCalendar();
c.set(Calendar.DAY_OF_MONTH, newDay);
setDate(c.getTime());
}

}

}

这是一个专门的选日期的类 ，你看看完了调用就行了

Answer 2

我推荐第一种方法，用awt或者swing做出来比较好，可以专门开一个线程来监听从界面上发来的消息，在将其载入数据库中，因为你是要能放在桌面的，jsp做出来就不是那么爽那，另外jsp要连接数据库，这个我没做过，就不知道了，呵呵，希望有所帮助。。。

Answer 3

http://code.javaeye.com/blog/283815

有的是日历控件的代码 看看就会用

Answer 4

我发现了 一个问题 那就是你的知识不够用了
还又要继续学习啊

Answer 5

google一下绝对有现成的 不用自己写