JAVA日历

效果图如下：

 import java.awt.*;
 import java.awt.event.*;
 import java.util.*;

 import javax.swing.*;
 import javax.swing.event.*;
 import javax.swing.table.*;

 public class MyCalendar extends JApplet
 {
     //定义星期天到星期六
     public static final String WEEK_SUN = "周日";
     public static final String WEEK_MON = "周一";
     public static final String WEEK_TUE = "周二";
     public static final String WEEK_WED = "周三";
     public static final String WEEK_THU = "周四";
     public static final String WEEK_FRI = "周五";
     public static final String WEEK_SAT = "周六";
     //设置背景颜色
     public static final Color background  = Color.white;
     //设置前景颜色
     public static final Color foreground  = Color.black;
     //设置题头星期的背景颜色和前景颜色
     public static final Color headerBackground  = Color.blue;
     public static final Color headerForeground  = Color.white;
     //设置被选中的日期的背景颜色和前景颜色
     public static final Color selectedBackground  = Color.red;
     public static final Color selectedForeground  = Color.white;

     private JPanel cPane;
     private JLabel yearsLabel;//年
     private JSpinner yearsSpinner;//年调控
     private JLabel monthsLabel;//月
     private JComboBox monthsComboBox;//月下拉框
     private JTable daysTable;//用来显示日期的table
     private AbstractTableModel daysModel;
     private Calendar calendar;
     //构造方法初始化panel

     public MyCalendar()
     {
         cPane = (JPanel) getContentPane();
     }
     //初始化，对所有的空间进行布局
     public void init()
     {

         cPane.setLayout(new BorderLayout());    //使用Border布局管理器
         calendar = Calendar.getInstance();    //获取当前时间
         calendar = Calendar.getInstance();
         yearsLabel = new JLabel("Year: ");
         yearsSpinner = new JSpinner();
         yearsSpinner.setEditor(new JSpinner.NumberEditor(yearsSpinner,"0000"));
         yearsSpinner.setValue(new Integer(calendar.get(Calendar.YEAR)));
         //增加监听 监听年份的改变
         yearsSpinner.addChangeListener(new ChangeListener()
         {
             public void stateChanged(ChangeEvent changeEvent)
             {
                 int day = calendar.get(Calendar.DAY_OF_MONTH);
                 calendar.set(Calendar.DAY_OF_MONTH, 1);
                 calendar.set(Calendar.YEAR,((Integer)yearsSpinner.getValue()).intValue());
                 int maxDay = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
                 calendar.set(Calendar.DAY_OF_MONTH, day>maxDay?maxDay:day);
                 updateView();
             }
         });

         JPanel yearMonthPanel = new JPanel();
         cPane.add(yearMonthPanel,BorderLayout.NORTH);
         yearMonthPanel.setLayout(new BorderLayout());
         yearMonthPanel.add(new JPanel(),BorderLayout.CENTER);
         JPanel yearPanel = new JPanel();
         yearMonthPanel.add(yearPanel,BorderLayout.WEST);
         yearPanel.setLayout(new BorderLayout());
         yearPanel.add(yearsLabel,BorderLayout.WEST);
         yearPanel.add(yearsSpinner,BorderLayout.CENTER);

         monthsLabel = new JLabel("Month: ");
         //向月份下拉框中增加内容
         monthsComboBox = new JComboBox();
         for(int i=1; i<=12; i++)
         {
             monthsComboBox.addItem(new Integer(i));
         }
         monthsComboBox.setSelectedIndex(calendar.get(Calendar.MONTH));
         //监听月份的改变
         monthsComboBox.addActionListener(new ActionListener() {

             @Override
             public void actionPerformed(ActionEvent actionEvevt) {
                 // TODO Auto-generated method stub
                 int day = calendar.get(Calendar.DAY_OF_MONTH);
                 calendar.set(Calendar.DAY_OF_MONTH,1);
                 calendar.set(Calendar.MONTH,monthsComboBox.getSelectedIndex());
                 int maxDay = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
                 calendar.set(Calendar.DAY_OF_MONTH,day>maxDay?maxDay:day);
                 updateView();
             }
         });

         JPanel monthPanel = new JPanel();
         yearMonthPanel.add(monthPanel,BorderLayout.EAST);
         monthPanel.setLayout(new BorderLayout());
         monthPanel.add(monthsLabel,BorderLayout.WEST);
         monthPanel.add(monthsComboBox,BorderLayout.CENTER);

         daysModel = new AbstractTableModel() {

             @Override
             public Object getValueAt(int row, int column) {
                 // TODO Auto-generated method stub
                 if(row==0)
                 {
                     return getHeader(column);
                 }
                 row--;
                 Calendar calendar = (Calendar)MyCalendar.this.calendar.clone();
                 calendar.set(Calendar.DAY_OF_MONTH,1);
                 int dayCount = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
                 int moreDayCount = calendar.get(Calendar.DAY_OF_WEEK)-1;    //每个月第一天从哪一列开始
                 int index = row*7 + column;
                 int dayIndex = index - moreDayCount + 1;
                 if(index<moreDayCount||dayIndex>dayCount)
                 {
                     return null;
                 }
                 else
                 {
                     return new Integer(dayIndex);
                 }
             }
             //设置行7
             @Override
             public int getRowCount() {
                 // TODO Auto-generated method stub
                 return 7;
             }
             //设置列7
             @Override
             public int getColumnCount() {
                 // TODO Auto-generated method stub
                 return 7;
             }
         };
         daysTable = new CalendarTable(daysModel,calendar);
         //设置每个cell可以被选中
         daysTable.setCellSelectionEnabled(true);
         daysTable.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
         daysTable.setDefaultRenderer(daysTable.getColumnClass(0),new TableCellRenderer() {
             @Override
             public Component getTableCellRendererComponent(JTable table,Object value,
                     boolean isSelected,boolean hasFocus,int row,int column) {
                 String text = (value == null )? "" : value.toString();
                 JLabel cell = new JLabel(text);
                 cell.setOpaque(true);
                 if(row == 0)
                 {
                     cell.setForeground(headerForeground);
                     cell.setBackground(headerBackground);
                 }
                 else
                 {
                     if(isSelected)
                     {
                         cell.setForeground(selectedForeground);
                         cell.setBackground(selectedBackground);
                     }
                     else
                     {
                         cell.setForeground(foreground);
                         cell.setBackground(background);
                     }
                 }
                 return cell;
             }
         });
         updateView();
         cPane.add(daysTable,BorderLayout.CENTER);
     }

     public static String getHeader(int index)
     {
         switch(index)
         {
         case 0:
             return WEEK_SUN;
         case 1:
             return WEEK_MON;
         case 2:
             return WEEK_TUE;
         case 3:
             return WEEK_WED;
         case 4:
             return WEEK_THU;
         case 5:
             return WEEK_FRI;
         case 6:
             return WEEK_SAT;
         default:
             return null;
         }
     }

     public void updateView()
     {
         daysModel.fireTableDataChanged();
         daysTable.setRowSelectionInterval(calendar.get(Calendar.WEEK_OF_MONTH),
                 calendar.get(Calendar.WEEK_OF_MONTH));
         daysTable.setColumnSelectionInterval(calendar.get(Calendar.DAY_OF_WEEK)-1,
                 calendar.get(Calendar.DAY_OF_WEEK)-1);
     }
     //设置日历的table
     public static class CalendarTable extends JTable
     {
         private Calendar calendar;
         public CalendarTable(TableModel model,Calendar calendar)
         {
             super(model);
             this.calendar = calendar;
         }
         public void changeSelection(int row,int column,boolean toggle,boolean extend)
         {
             super.changeSelection(row, column, toggle, extend);
             if(row == 0)
             {
                 return;
             }
             Object obj = getValueAt(row,column);
             if(obj != null)
             {
                 calendar.set(Calendar.DAY_OF_MONTH,((Integer)obj).intValue());
             }
         }
     }
     //让applet作为一个可执行的程序来运行
     public static void main(String[] args)
     {
         JFrame frame = new JFrame("ShuBing日历");
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         MyCalendar myCalendar = new MyCalendar();
         myCalendar.init();
         frame.getContentPane().add(myCalendar);
         frame.setSize(300,200);
         frame.setVisible(true);
     }
 }