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分享package com.gui;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Calendar;
import java.util.GregorianCalendar;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class MyRiLi extends JPanel {
protected int yy;
protected int mm, dd;
/** 存放按钮 */
protected JButton labs[][];
/** 每个月份开头的几个空白日期 */
protected int leadGap = 0;
/** 日期对象 */
Calendar calendar = new GregorianCalendar();
/** 年份 */
protected final int thisYear = calendar.get(Calendar.YEAR);
/** 月份 */
protected final int thisMonth = calendar.get(Calendar.MONTH);
/** 取消按钮高亮时以这个按钮为基准 */
private JButton b0;
/** 存放月份 */
private JComboBox monthChoice;
/** 存放年份 */
private JComboBox yearChoice;
/**
* 构造方法,获取今天的日期
*/
MyRiLi() {
super();
setYYMMDD(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH),
calendar.get(Calendar.DAY_OF_MONTH));
buildGUI();
recompute();
}
MyRiLi(int year, int month, int today) {
super();
setYYMMDD(year, month, today);
buildGUI();
recompute();
}
private void setYYMMDD(int year, int month, int today) {
yy = year;
mm = month;
dd = today;
}
String[] months = { "一月", "二月", "三月", "四月", "五月", "六月", "七月", "八月", "九月",
"十月", "十一月", "十二月" };
private void buildGUI() {
getAccessibleContext().setAccessibleDescription("日历未上载");
setBorder(BorderFactory.createEtchedBorder());
setLayout(new BorderLayout());
JPanel tp = new JPanel();
tp.add(monthChoice = new JComboBox());
for (int i = 0; i < months.length; i++)
monthChoice.addItem(months[i]);
monthChoice.setSelectedItem(months[mm]);
monthChoice.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
int i = monthChoice.getSelectedIndex();
if (i >= 0) {
mm = i;
recompute();
}
}
});
monthChoice.getAccessibleContext().setAccessibleName("Months");
monthChoice.getAccessibleContext().setAccessibleDescription("选择一个月份");
tp.add(yearChoice = new JComboBox());
yearChoice.setEditable(true);
for (int i = yy - 5; i < yy + 5; i++)
yearChoice.addItem(Integer.toString(i));
yearChoice.setSelectedItem(Integer.toString(yy));
yearChoice.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
int i = yearChoice.getSelectedIndex();
if (i >= 0) {
yy = Integer.parseInt(yearChoice.getSelectedItem()
.toString());
recompute();
}
}
});
add(BorderLayout.CENTER, tp);
JPanel bp = new JPanel();
bp.setLayout(new GridLayout(7, 7));
labs = new JButton[6][7];
// 星期
bp.add(b0 = new JButton("日"));
bp.add(new JButton("一"));
bp.add(new JButton("二"));
bp.add(new JButton("三"));
bp.add(new JButton("四"));
bp.add(new JButton("五"));
bp.add(new JButton("六"));
ActionListener dateSetter = new ActionListener() {
public void actionPerformed(ActionEvent e) {
String num = e.getActionCommand();
if (!num.equals("")) {
// 将当前日期高亮
setDayActive(Integer.parseInt(num));
}
}
};
// 创建所有的按钮
for (int i = 0; i < 6; i++)
for (int j = 0; j < 7; j++) {
bp.add(labs[i][j] = new JButton(""));
labs[i][j].addActionListener(dateSetter);
}
add(BorderLayout.SOUTH, bp);
}
// 列出每个月的天数
public final static int dom[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31,
30, 31 };
/** 计算每个月份的日期,显示在面板上 */
protected void recompute() {
if (mm < 0 || mm > 11)
throw new IllegalArgumentException("月份 " + mm + " 必须在0-11之间");
clearDayActive();
calendar = new GregorianCalendar(yy, mm, dd);
// 计算每个月份开头的几个空白日期
leadGap = new GregorianCalendar(yy, mm, 1).get(Calendar.DAY_OF_WEEK) - 1;
int daysInMonth = dom[mm];
if (isLeap(calendar.get(Calendar.YEAR)) && mm > 1)
++daysInMonth;
for (int i = 0; i < leadGap; i++) {
labs[0][i].setText("");
}
// 填入日期数字
for (int i = 1; i <= daysInMonth; i++) {
JButton b = labs[(leadGap + i - 1) / 7][(leadGap + i - 1) % 7];
b.setText(Integer.toString(i));
}
for (int i = leadGap + 1 + daysInMonth; i < 6 * 7; i++) {
labs[(i) / 7][(i) % 7].setText("");
}
if (thisYear == yy && mm == thisMonth)
setDayActive(dd);
repaint();
}
/**
* 判断是否闰年
*/
public boolean isLeap(int year) {
if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0)
return true;
return false;
}
/** 设置年月日 */
public void setDate(int yy, int mm, int dd) {
this.yy = yy;
this.mm = mm;
this.dd = dd;
recompute();
}
/** 取消按钮高亮 */
private void clearDayActive() {
JButton b;
if (activeDay > 0) {
b = labs[(leadGap + activeDay - 1) / 7][(leadGap + activeDay - 1) % 7];
b.setBackground(b0.getBackground());
b.repaint();
activeDay = -1;
}
}
private int activeDay = -1;
/** 设置按钮高亮 */
public void setDayActive(int newDay) {
clearDayActive();
if (newDay <= 0)
dd = new GregorianCalendar().get(Calendar.DAY_OF_MONTH);
else
dd = newDay;
Component square = labs[(leadGap + newDay - 1) / 7][(leadGap + newDay - 1) % 7];
square.setBackground(Color.red);
square.repaint();
activeDay = newDay;
}
public static void main(String[] av) {
JFrame f = new JFrame("MyRiLi");
Container c = f.getContentPane();
c.setLayout(new FlowLayout());
c.add(new MyRiLi());
f.pack();
f.setVisible(true);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}