date.java

可在java应用程序的界面中输入年月日的编辑框java bean

package date;

import java.awt.*;
import com.borland.jbcl.layout.*;
import javax.swing.*;
import java.io.*;
import java.util.Calendar;
import java.awt.event.*;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2002</p>
 * <p>Company: </p>
 * @author unascribed
 * @version 1.0
 */

public class Date extends JPanel{
  XYLayout xYLayout1 = new XYLayout();
  JComboBox year = new JComboBox();
  JComboBox month = new JComboBox();
  JComboBox day = new JComboBox();
  JLabel jLabel1 = new JLabel();
  JLabel jLabel2 = new JLabel();
  JLabel jLabel3 = new JLabel();
  private String date_str;
  private String separator;
  boolean enable=true;

  public Date() {
    try {
      jbInit();
    }
    catch(Exception ex) {
      ex.printStackTrace();
    }
  }
  private void jbInit() throws Exception {
    this.setLayout(xYLayout1);
    jLabel1.setFont(new java.awt.Font("SansSerif", 0, 14));
    jLabel1.setText("年");
    jLabel2.setFont(new java.awt.Font("SansSerif", 0, 14));
    jLabel2.setText("月");
    jLabel3.setFont(new java.awt.Font("SansSerif", 0, 14));
    jLabel3.setText("日");
    day.setFont(new java.awt.Font("DialogInput", 0, 15));
    year.setFont(new java.awt.Font("DialogInput", 0, 15));
    year.addItemListener(new java.awt.event.ItemListener() {
      public void itemStateChanged(ItemEvent e) {
        year_itemStateChanged(e);
      }
    });
    month.setFont(new java.awt.Font("DialogInput", 0, 15));
    month.addItemListener(new java.awt.event.ItemListener() {
      public void itemStateChanged(ItemEvent e) {
        month_itemStateChanged(e);
      }
    });
    xYLayout1.setWidth(245);
    xYLayout1.setHeight(31);
    this.setEnabled(true);
    this.add(day,        new XYConstraints(172, 3, 52, 24));
    this.add(year,  new XYConstraints(2, 3, 70, 24));
    this.add(jLabel1,   new XYConstraints(74, 6, -1, -1));
    this.add(month,        new XYConstraints(95, 3, 54, 24));
    this.add(jLabel2,   new XYConstraints(152, 6, -1, -1));
    this.add(jLabel3,   new XYConstraints(227, 6, -1, -1));

    Calendar date = Calendar.getInstance();
    int year_int = date.get(Calendar.YEAR); //取年
    int month_int = (date.get(Calendar.MONTH)+1); //取月
    int day_int = date.get(Calendar.DATE );

    for(int i=0; i<50; i++)
      year.addItem(Integer.toString(2000+i)) ;
    for(int i=1; i<13; i++)
      month.addItem(Integer.toString(i)) ;
    for(int i=1; i<32; i++)
      day.addItem(Integer.toString(i)) ;

    year.setSelectedItem(Integer.toString(year_int) ) ;
    checkFeb(Integer.parseInt(year.getSelectedItem() .toString() ),month,day);

    month.setSelectedItem(Integer.toString(month_int) ) ;
    checkFeb(Integer.parseInt(year.getSelectedItem() .toString() ),month,day);

    day.setSelectedItem(Integer.toString(day_int) ) ;

    separator="-";

    year.setEnabled(enable) ;
    month.setEnabled(enable) ;
    day.setEnabled(enable) ;
    /*jLabel1.setEnabled(enable) ;
    jLabel2.setEnabled(enable) ;
    jLabel3.setEnabled(enable) ;*/
  }
  public static void main(String[] args) {
    Date date1 = new Date();
  }
  public void setDate_str(String date_str) {
   /* year.setSelectedItem(date_str.substring(0,3) );
    month.setSelectedItem(date_str.substring(5,6)) ;
    day.setSelectedItem(date_str.substring(8,9)) ;*/
    this.date_str = date_str;
  }
  public String getDate_str() {
    String monthstr=month.getSelectedItem().toString();
    if(monthstr.length() <2)
        monthstr="0"+monthstr;
    String daystr=day.getSelectedItem().toString();
    if(daystr.length() <2)
        daystr="0"+daystr;
    date_str=year.getSelectedItem().toString() +separator+monthstr +separator+daystr ;
    return date_str;
  }
  public JComboBox getYear() {
    return year;//.getSelectedItem() .toString() ;
  }
  public void setYear(String year) {
    this.year.setSelectedItem(year) ;
  }
  public JComboBox getDay() {
    return day;//.getSelectedItem().toString()  ;
  }
  public void setDay(String day) {
    this.day.setSelectedItem(day);
  }
  public JComboBox getMonth() {
    return month;//.getSelectedItem().toString();
  }
  public void setMonth(String month) {
    this.month.setSelectedItem(month);;
  }
  public void setSeparator(String separator) {
    this.separator = separator;
  }
  public String getSeparator() {
    return separator;
  }

  public void setYearRange(int minYear,int maxYear) {
    for(int i=minYear; i<=maxYear; i++)
      year.addItem(Integer.toString(i)) ;
}

  public void setEnable(boolean enable) {
    this.enable = enable;
    year.setEnabled(this.enable) ;
    month.setEnabled(this.enable) ;
    day.setEnabled(this.enable) ;
    /*jLabel1.setEnabled(this.enable) ;
    jLabel2.setEnabled(this.enable) ;
    jLabel3.setEnabled(this.enable) ;*/
    try{    jbInit();}
    catch(Exception ex)
    {
	System.out .println(ex.getMessage() ) ;
    }
  }

   public static void checkFeb(int year,JComboBox c1,JComboBox c2){
    int y0=year;
    int j=c2.getSelectedIndex(),i=1;
    JComboBox cBox1=c1;
    JComboBox cBox2=c2;
    switch(cBox1.getSelectedIndex()){
      case 3:
      case 5:
      case 8:
      case 10://小月
        c2.removeAllItems();
        for(i=1;i<31;i++){
	      c2.addItem(Integer.toString(i));
        }
        c2.setSelectedIndex(j%30);
        return;
      case 1://二月
        c2.removeAllItems();
        if(isLeapYear(y0)){//闰年
          for(i=1;i<30;i++){
	      c2.addItem(Integer.toString(i));
          }
          c2.setSelectedIndex(j%29);
          return;
        }
        else{//平年
          for(i=1;i<29;i++){
	      c2.addItem(Integer.toString(i));
          }
          c2.setSelectedIndex(j%28);
        }
        return;
      default://大月
        c2.removeAllItems();
        for(i=1;i<32;i++){
	      c2.addItem(Integer.toString(i));
        }
        return;
    }
  }

  public static boolean isLeapYear(int yy){
    int year=yy;
    if(year%4!=0)
      return false;
    if(year%100==0&&year%400!=0)
      return false;
    return true;
  }

  void year_itemStateChanged(ItemEvent e) {
	checkFeb(Integer.parseInt(year.getSelectedItem() .toString() ),month,day);
  }

  void month_itemStateChanged(ItemEvent e) {
      checkFeb(Integer.parseInt(year.getSelectedItem() .toString() ),month,day);
  }
}