【实训要求】

 * 1.使用BorderLayout进行总体布局 
 * 2.在North位置放置包含两个按钮(上月和下月)的Panel
 * 3.在South位置放置一个Label用于显示当前年份和月份 
 * 4.在Center位置放置一个显示日历的Panel 
 * 5.显示日历的Panel设置7行7列的GridLayout布局，其中第1行放置7个按钮显示周“几”，其他6行放置42个Label用于显示日期
 * 6.启动程序时日历中默认显示当前月份的日历 
 * 7.点击“上月”和“下月”可翻看上个月和下个月的日历

 

【程序运行效果】

 

【代码】

package com.practise.Calendar;import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Calendar;import javax.swing.JLabel;/*** 实训要求： * 1.使用BorderLayout进行总体布局 * 2.在North位置放置包含两个按钮(上月和下月)的Panel* 3.在South位置放置一个Label用于显示当前年份和月份 * 4.在Center位置放置一个显示日历的Panel * 5.显示日历的Panel设置7行7列的GridLayout布局，其中第1行放置7个按钮显示周“几”，其他6行放置42个Label用于显示日期* 6.启动程序时日历中默认显示当前月份的日历 * 7.点击“上月”和“下月”可翻看上个月和下个月的日历* * @author DoubleShift**/
public class CalendarBean implements ActionListener {JLabel now; // 显示当前日期JLabel[] label; // 显示日历// String[] day;int year = 0;int month = 0;public void setYear(int year) {this.year = year;}public void setMonth(int month) {this.month = month;}@Overridepublic void actionPerformed(ActionEvent e) {String str = e.getActionCommand();if (str.equals("lastmonth")) {month--;if (month == 0) {month = 12;year--;}} else if (str.equals("nextmonth")) {month++;if (month == 13) {month = 1;year++;}}now.setText("日历：" + year + "年" + month + "月");String[] a = getCalendar(); // 获取当前月份的日历for (int i = 0; i < a.length; i++) {label[i].setText("          " + a[i]);}}public String[] getCalendar() {String[] a = new String[42]; // 6*7Calendar rili = Calendar.getInstance();rili.set(year, month - 1, 1); // 设置当月一号int weekDay = rili.get(Calendar.DAY_OF_WEEK) - 1;int day = 0;if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) {day = 31;}if (month == 4 || month == 6 || month == 9 || month == 11) {day = 30;}if (month == 2) {if ((year % 4 == 0) && (year % 100 != 0) || (year % 400 == 0)) {day = 29;} else {day = 28;}}for (int i = 0; i < weekDay; i++) {a[i] = "    "; // 之前设置为空}for (int i = weekDay, n = 1; i < weekDay + day; i++) {a[i] = String.valueOf(n);n++;}for (int i = weekDay + day; i < a.length; i++) {a[i] = "    ";  // 之后设置为空}return a;}}

package com.practise.Calendar;import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;/*** * @author DoubleShift**/
public class MyCalendar extends JFrame {private static final long serialVersionUID = 1L;JButton bx, by, b1, b2, b3, b4, b5, b6, b7;CalendarBean cbBean = new CalendarBean();JLabel[] label;JLabel now;public static void main(String[] args) {MyCalendar myCalendar = new MyCalendar();myCalendar.setSize(500, 400);myCalendar.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);myCalendar.setTitle("万年历");myCalendar.setVisible(true);}public MyCalendar() {int year, month;setLayout(new BorderLayout());// 北面設置上月和下月的按钮JPanel pNorth = new JPanel();cbBean = new CalendarBean();cbBean.setYear(2019);cbBean.setMonth(12);String[] a = cbBean.getCalendar();bx = new JButton("上月");bx.setActionCommand("lastmonth");bx.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {cbBean.actionPerformed(e);}});by = new JButton("下月");by.setActionCommand("nextmonth");by.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {cbBean.actionPerformed(e);}});pNorth.add(bx);pNorth.add(by);add(pNorth, BorderLayout.NORTH);// 面板中间设置日历显示GridLayout grid = new GridLayout(7, 7);JPanel pCenter = new JPanel();b1 = new JButton("日");b2 = new JButton("一");b3 = new JButton("二");b4 = new JButton("三");b5 = new JButton("四");b6 = new JButton("五");b7 = new JButton("六");pCenter.add(b1);pCenter.add(b2);pCenter.add(b3);pCenter.add(b4);pCenter.add(b5);pCenter.add(b6);pCenter.add(b7);label = new JLabel[42];for (int i = 0; i < 42; i++) {label[i] = new JLabel();pCenter.add(label[i]);}cbBean.label = this.label;for (int i = 0; i < a.length; i++) {label[i].setText("          " + a[i]);}pCenter.setLayout(grid);add(pCenter, BorderLayout.CENTER);// 面板南面設置当前日期JPanel southJPanel = new JPanel();now = new JLabel();now.setText("日历：" + cbBean.year + "年" + cbBean.month + "月");cbBean.now = this.now;southJPanel.add(now);add(southJPanel, BorderLayout.SOUTH);}
}