JAVA万年历里 怎么算几天是星期几

Question

还有万年历的代码参考一下

Answer 1

import java.awt.Color;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.util.Date;
import java.util.GregorianCalendar;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
public class Calender2 extends JFrame implements ActionListener, ItemListener {
/**
* 实现简单的日历功能
*
* @author Jadie version 1.0 2007/12/29
*
*/
private static final long serialVersionUID = 1L;

public static void main(String args[]) {
try {
Calender2 frame = new Calender2();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
private Date date = new Date();

private GregorianCalendar gregorianCalendar = new GregorianCalendar();

private String[] stringWeek = new String[] { "SUN", "MON", "TUE", "WED",
"THU", "FRI", "SAT" };

private String[] stringWeekCn = new String[] { "星期天", "星期一", "星期二", "星期三",
"星期四", "星期五", "星期六" };

private String[] stringMonth = new String[] { "Jan", "Feb", "Mar", "Apr",
"May", "Jun", "Jul", "Aug", "Sept", "Oct", "Nov", "Dec" };
private String[] strSysTime = new String[6];
// 存储当前日期信息
private String[] strSysNowTime = new String[6];
// 存储运行时日期信息
private JButton[] buttonDay = new JButton[42];
private JButton[] buttonWeek = new JButton[7];
private JLabel labelMonth = new JLabel();
private JButton buttonToday = new JButton();
private JButton buttonLastMonth = new JButton();
private JButton buttonNextMonth = new JButton();
private JComboBox comboYear = new JComboBox();
private JComboBox comboMonth = new JComboBox();
public Calender2() {
super("万年历---156制作");
getContentPane().setLayout(new GridLayout(8, 7, 3, 5));
setBounds(250, 200, 530, 360);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

comboYear.setForeground(new Color(0, 0, 255));
comboYear.setFont(new Font("", Font.PLAIN, 14));
for (int y = 1900; y < 2101; y++) {
comboYear.addItem(" " + new Integer(y).toString());
}
getContentPane().add(comboYear);
comboYear.addItemListener(this);

final JLabel labelYear = new JLabel();
labelYear.setForeground(Color.BLUE);
labelYear.setFont(new Font("新宋体", Font.PLAIN, 14));
getContentPane().add(labelYear);
labelYear.setText(" 年");

comboMonth.setForeground(new Color(0, 0, 255));
comboMonth.setFont(new Font("", Font.PLAIN, 14));
for (int m = 1; m < 13; m++) {
comboMonth.addItem(" " + new Integer(m).toString());
}
getContentPane().add(comboMonth);
comboMonth.addItemListener(this);

getContentPane().add(labelMonth);
labelMonth.setForeground(Color.BLUE);
labelMonth.setFont(new Font("新宋体", Font.PLAIN, 14));
labelMonth.setText(" 月");

getContentPane().add(buttonLastMonth);
buttonLastMonth.setForeground(Color.BLUE);
buttonLastMonth.setFont(new Font("新宋体", Font.PLAIN, 14));
buttonLastMonth.setText("上月");
buttonLastMonth.addActionListener(this);

getContentPane().add(buttonToday);
buttonToday.setForeground(Color.BLUE);
buttonToday.setFont(new Font("新宋体", Font.PLAIN, 14));
buttonToday.setText("今天");
buttonToday.addActionListener(this);

getContentPane().add(buttonNextMonth);
buttonNextMonth.setForeground(Color.BLUE);
buttonNextMonth.setFont(new Font("新宋体", Font.PLAIN, 14));
buttonNextMonth.setText("下月");
buttonNextMonth.addActionListener(this);

for (int i = 0; i < 7; i++) {
buttonWeek[i] = new JButton();
if (i == 0 || i == 6) {
buttonWeek[i].setForeground(Color.RED);
} else {
buttonWeek[i].setForeground(Color.BLUE);
}
buttonWeek[i].setFont(new Font("新宋体", Font.PLAIN, 12));
buttonWeek[i].setText(stringWeekCn[i]);
getContentPane().add(buttonWeek[i]);
}

for (int i = 0; i < 42; i++) {
buttonDay[i] = new JButton();
buttonDay[i].setText("");
getContentPane().add(buttonDay[i]);
}
this.setResizable(false);
getSysNowTimeInfo();
setNowDate();
setNowDate();
}

public void setSysDate(int year, int month) {
// 将日期设置为year年month月1日
gregorianCalendar.set(year, month, 1);
}

public void actionPerformed(ActionEvent ae) {
if (ae.getSource() == buttonToday) {
setNowDate();
setNowDate();
} else if (ae.getSource() == buttonLastMonth) {
setDate(-1);
} else {
setDate(1);
}
}

public void itemStateChanged(ItemEvent arg0) {
setDate(0);
}

public void getSysNowTimeInfo() {
// 得到程序运行时的时间信息并存储在字符串数组strSysNowTime中
date = gregorianCalendar.getTime();
strSysNowTime = (date + "").split(" ");
}

public void getSysTimeInfo() {
// 得到系统当前的时间信息并存储在字符串数组strSysTime中
date = gregorianCalendar.getTime();
strSysTime = (date + "").split(" ");
}

public int getNowMonth() {
int month = 0;
for (int i = 0; i < 12; i++) {
if (strSysNowTime[1].equalsIgnoreCase(stringMonth[i])) {
month = i;
break;
}
}
return month;
}

public int weekStrat(String strWeek) {
// 返回字符串strWeek与星期中的第几天匹配，SUN为第一天
int strat = 0;
for (int i = 0; i < 7; i++) {
if (strWeek.equalsIgnoreCase(stringWeek[i])) {
strat = i;
break;
}
}
return strat;
}

public void setNowDate() {
// 将时间设置为程序运行时的时间
setSysTime(getNowYear(), getNowMonth());
getSysTimeInfo();
setDayNull();
getDay(getMonthDays(getNowYear(), getNowMonth() - 1), getMonthDays(
getNowYear(), getNowMonth()), weekStrat(strSysTime[0]),
getNowDay());
comboYear.setSelectedIndex(getNowYear() - 1900);
comboMonth.setSelectedIndex(getNowMonth());
}

public void setDate(int move) {
// 将时间设置为选中的年月增加move个月之后的时间
setSysTime(getYear(), getMonth() + move);
getSysTimeInfo();
setDayNull();
getDay(getMonthDays(getYear(), getMonth() + move - 1), getMonthDays(
getYear(), getMonth() + move), weekStrat(strSysTime[0]), -1);
if (move != 0) {
if (getMonth() == 0 && move < 0) {
move = 11;
comboYear.setSelectedIndex(getYear() - 1901);
} else if (getMonth() == 11 && move > 0) {
move = -11;
comboYear.setSelectedIndex(getYear() - 1899);
} else {
comboYear.setSelectedIndex(getYear() - 1900);
}
comboMonth.setSelectedIndex(getMonth() + move);
}
}

public void setSysTime(int year, int month) {
gregorianCalendar.set(year, month, 1);
}

public int getNowYear() {
return Integer.parseInt(strSysNowTime[5]);
}

public int getNowDay() {
return Integer.parseInt(strSysNowTime[2]);
}

public int getYear() {
return comboYear.getSelectedIndex() + 1900;
}

public int getMonth() {
return comboMonth.getSelectedIndex();
}

public void setDayNull() {
for (int d = 0; d < 42; d++) {
buttonDay[d].setText("");
}
}

public void getDay(int lastMonDays, int monthDays, int startWeek, int day) {
// 设置日期颜色并打印
for (int d = 0; d < startWeek + 1; d++) {
buttonDay[d].setForeground(Color.GRAY);
buttonDay[d].setText((lastMonDays - startWeek) + d + 1 + "");
}
for (int d = startWeek; d < startWeek + monthDays; d++) {
if ((d - startWeek + 1) == day) {
buttonDay[d].setForeground(Color.blue);
} else if (d % 7 == 0 || d % 7 == 6) {
buttonDay[d].setForeground(Color.RED);
} else {
buttonDay[d].setForeground(Color.BLACK);
}

buttonDay[d].setText(d - startWeek + 1 + "");
}
for (int d = monthDays + startWeek; d < 42; d++) {
buttonDay[d].setForeground(Color.GRAY);
buttonDay[d].setText(d - (monthDays + startWeek) + 1 + "");
}
}

public int getMonthDays(int year, int month) {
// 返回year年month月的天数
switch (month) {
case 3:
case 5:
case 8:
case 10:
return 30;
case 1:
if (gregorianCalendar.isLeapYear(year)) {
return 29;
} else {
return 28;
}
default:
return 31;
}
}
}

本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/yujun3201094/archive/2008/06/02/2503006.aspx

Answer 2

Calendar类，查JDK看一下它的方法，就明白了。