calenderdialog.java

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package mypack;
import java.util.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class CalenderDialog extends JFrame implements ItemListener{
    /**
	 * 
	 */
	private static final long serialVersionUID = 2658632819629485313L;
	JComboBox list=null;
    CalenderPane calenderPane=null;
    Container con=null;
    CalenderDialog()
    {
    	list=new JComboBox();
    	list.addItem(2007);
    	for(int i=2000;i<=2010;i++)
    	{
    		String temp=""+i;
    		list.addItem(temp);
    	}
    	
    	list.addItemListener(this);
    	con=this.getContentPane();
    	con.add(list,BorderLayout.NORTH);
    	calenderPane=new CalenderPane(2007);
    	con.add(calenderPane,BorderLayout.CENTER);
    	setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);
    	setBounds(100,100,400,240);
    	setVisible(true);
    	validate();
    }
	public void itemStateChanged(ItemEvent e) {
		// TODO 自动生成方法存根
		 con.remove(calenderPane);
		 String str=(String)list.getSelectedItem();
		 int year=Integer.parseInt(str);
		 calenderPane=new CalenderPane(year);
		 con.add(calenderPane,BorderLayout.CENTER);
		 con.validate();
		 validate();
	}
            
}


class CalenderPane extends JPanel implements ActionListener
{

	/**
	 * 
	 */
	private static final long serialVersionUID = -4099676573160654052L;
    JTable table;
    CalendarBean calendar;
    Object a[][]=new Object[6][7];
    Object name[]={"星期日","星期一","星期二","星期三","星期四","星期五","星期六"};
    JButton nextMonth,previousMonth;
    int year=2007,month=1;
    JLabel showMessage=new JLabel("",JLabel.CENTER);
    public CalenderPane(int year){
    	setLayout(new BorderLayout());
    	calendar=new CalendarBean();
    	calendar.setYear(year);
    	calendar.setMonth(month);
    	String day[]=calendar.getCalendar();  //返回一个自定义的日历主面板
    	table=new JTable(a,name);
    	table.setRowSelectionAllowed(false);
    	setTable(day);
    	nextMonth=new JButton("下月");
    	previousMonth=new JButton("上月");
    	nextMonth.addActionListener(this);
    	previousMonth.addActionListener(this);
    	JPanel pNorth=new JPanel(),pSouth=new JPanel();
    	pNorth.add(previousMonth);
    	pNorth.add(nextMonth);
    	pSouth.add(showMessage);
    	showMessage.setText("日历："+calendar.getYear()+"年"+calendar.getMonth()+"月");
    	add(new JScrollPane(table),BorderLayout.CENTER);
    	add(pNorth,BorderLayout.NORTH);
    	add(pSouth,BorderLayout.SOUTH);
    	validate();
    }
	public void actionPerformed(ActionEvent e) {
		// TODO 自动生成方法存根
		if(e.getSource()==nextMonth)
		{
			month=month+1;
			if(month>12) month=1;
			calendar.setMonth(month);
			String day[]=calendar.getCalendar();
			setTable(day);
			table.repaint();
		}
		else if(e.getSource()==previousMonth)
		{
			month=month-1;
			if(month<1) month=12;
			calendar.setMonth(month);
			String day[]=calendar.getCalendar();
			setTable(day);
			table.repaint();
		}
		showMessage.setText("日历："+calendar.getYear()+"年"+calendar.getMonth()+"月");
	}
	public void setTable(String day[])
	{
		int n=0;
		for(int i=0;i<6;i++){
			for(int j=0;j<7;j++){
				a[i][j]=day[n];
				n++;
			}
		}
	}
	
}

class CalendarBean        //自定义日历主面板
{
	String day[];
	int year=2007,month=0;
	public void setYear(int year){
		this.year=year;
	}
	public void setMonth(int month){
		this.month=month;
	}
	public int getYear(){
		return year;
	}
	public int getMonth(){
		return month;
	}
	public String[] getCalendar(){    //返回一个日期面板
		String a[]=new String[42];
		Calendar calendar=Calendar.getInstance();
		calendar.set(year, month-1,1);
		int weekday=calendar.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==7||month==8||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=weekday,n=1;i<weekday+day;i++)
		{
			a[i]=String.valueOf(n);
			n++; 
		}
		return a;
	}
}