什么是java控件？怎样使用java控件？

Posted 2023-03-19

正在做小项目用到了关于处理日期的自定义控件

参考技术A import Java.util.Date;
import java.util.Calendar;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.text.ParseException ;
import java.awt.Color ;
import java.awt.Font;
import java.awt.Point ;
import java.awt.Dimension ;
import java.awt.BorderLayout ;
import java.awt.FlowLayout ;
import java.awt.GridLayout ;
import java.awt.Component ;
import java.awt.Cursor ;
import java.awt.Frame ;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
//import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JPanel;
import javax.swing.JLabel;
import javax.swing.jspinner ;
import javax.swing.JSpinner.NumberEditor ;
import javax.swing.SpinnerNumberModel;
import javax.swing.SwingUtilities;
import javax.swing.SwingConstants ;
import javax.swing.event.ChangeListener ;
import javax.swing.event.ChangeEvent ;
import javax.swing.border.LineBorder ;

public class DateChooserJButton extends JButton

private DateChooser dateChooser =null;

private String preLabel ="" ;

public DateChooserJButton()
this(getNowDate()) ;


public DateChooserJButton(SimpleDateFormat df , String dateString)
this() ;
setText(df,dateString) ;


public DateChooserJButton(Date date)
this("",date);


public DateChooserJButton(String preLabel , Date date)
if (preLabel!=null) this.preLabel = preLabel ;
setDate(date) ;
setBorder(null) ;
setCursor(new Cursor(Cursor.HAND_CURSOR)) ;
super.addActionListener( new ActionListener()
public void actionPerformed(ActionEvent e)
if (dateChooser==null) dateChooser = new DateChooser();
Point p = getLocationOnScreen() ;
p.y = p.y+30 ;
dateChooser.showDateChooser(p) ;

) ;


private static Date getNowDate()
return Calendar.getInstance().getTime() ;


private static SimpleDateFormat getDefaultDateFormat()
return new SimpleDateFormat("yyyy年MM月dd日HH时") ;


//覆盖父类的方法
public void setText(String s)
Date date ;
try
date = getDefaultDateFormat().parse(s) ;
catch (ParseException e)
date = getNowDate() ;

setDate(date) ;


public void setText(SimpleDateFormat df , String s)

Date date ;
try
date = df.parse(s) ;
catch (ParseException e)
date = getNowDate() ;

setDate(date) ;


public void setDate(Date date)
super.setText(preLabel+getDefaultDateFormat().format(date));


public Date getDate()
String dateString = getText().substring(preLabel.length());
try
return getDefaultDateFormat().parse(dateString);
catch (ParseException e)
return getNowDate() ;




//覆盖父类的方法使之无效
public void addActionListener(ActionListener listener )


private class DateChooser extends JPanel implements ActionListener ,ChangeListener
int startYear = 1980; //默认【最小】显示年份
int lastYear = 2050; //默认【最大】显示年份
int width = 200; //界面宽度
int height = 200; //界面高度

Color backGroundColor = Color.gray; //底色
//月历表格配色----------------//
Color palletTableColor = Color.white; //日历表底色
Color todayBackColor = Color.orange; //今天背景色
Color weekFontColor = Color.blue; //星期文字色
Color dateFontColor = Color.black; //日期文字色
Color weekendFontColor = Color.red; //周末文字色

//控制条配色------------------//
Color controlLineColor = Color.pink; //控制条底色
Color controlTextColor = Color.white; //控制条标签文字色

Color rbFontColor = Color.white; //RoundBox文字色
Color rbBorderColor = Color.red; //RoundBox边框色
Color rbButtonColor = Color.pink; //RoundBox按钮色
Color rbBTFontColor = Color.red; //RoundBox按钮文字色

JDialog dialog ;
JSpinner yearSpin ;
JSpinner monthSpin ;
JSpinner hourSpin ;
JButton[][] daysButton = new JButton[6][7] ;

DateChooser()

setLayout(new BorderLayout());
setBorder(new LineBorder(backGroundColor, 2));
setBackground(backGroundColor);

JPanel topYearAndMonth = createYearAndMonthPanal();
add(topYearAndMonth,BorderLayout.NORTH);
JPanel centerWeekAndDay = createWeekAndDayPanal();
add(centerWeekAndDay,BorderLayout.CENTER);



private JPanel createYearAndMonthPanal()
Calendar c = getCalendar() ;
int currentYear =c.get(Calendar.YEAR);
int currentMonth =c.get(Calendar.MONTH)+1;
int currentHour =c.get(Calendar.HOUR_OF_DAY);

JPanel result = new JPanel();
result.setLayout(new FlowLayout());
result.setBackground(controlLineColor);

yearSpin = new JSpinner(new SpinnerNumberModel(currentYear,startYear,lastYear,1));
yearSpin.setPreferredSize(new Dimension(48,20)) ;
yearSpin.setName("Year") ;
yearSpin.setEditor(new JSpinner.NumberEditor(yearSpin, "####")) ;
yearSpin.addChangeListener(this) ;
result.add(yearSpin) ;

JLabel yearLabel = new JLabel("年");
yearLabel.setForeground(controlTextColor);
result.add(yearLabel);

monthSpin = new JSpinner(new SpinnerNumberModel(currentMonth,1,12,1));
monthSpin.setPreferredSize(new Dimension(35,20)) ;
monthSpin.setName("Month") ;
monthSpin.addChangeListener(this) ;

result.add(monthSpin) ;

JLabel monthLabel = new JLabel("月");
monthLabel.setForeground(controlTextColor);
result.add(monthLabel);

hourSpin = new JSpinner(new SpinnerNumberModel(currentHour,0,23,1));
hourSpin.setPreferredSize(new Dimension(35,20)) ;
hourSpin.setName("Hour") ;
hourSpin.addChangeListener(this) ;
result.add(hourSpin) ;

JLabel hourLabel = new JLabel("时");
hourLabel.setForeground(controlTextColor);
result.add(hourLabel);

return result ;


private JPanel createWeekAndDayPanal()
String colname[] = "日","一","二","三","四","五","六";
JPanel result = new JPanel();
//设置固定字体，以免调用环境改变影响界面美观
result.setFont(new Font("宋体", Font.PLAIN, 12));

result.setLayout(new GridLayout(7,7));
result.setBackground(Color.white);
JLabel cell ;

for(int i=0;i<7;i++)
cell = new JLabel(colname[i]);
cell.setHorizontalAlignment(JLabel.RIGHT);
if (i==0 i==6) cell.setForeground(weekendFontColor) ;
else cell.setForeground(weekFontColor) ;
result.add(cell) ;


int actionCommandId = 0 ;
for(int i = 0; i < 6; i++)
for(int j = 0; j < 7; j++)
JButton numberButton = new JButton();
numberButton.setBorder(null) ;
numberButton.setHorizontalAlignment(SwingConstants.RIGHT);
numberButton.setActionCommand(String.valueOf(actionCommandId)) ;
numberButton.addActionListener(this) ;
numberButton.setBackground(palletTableColor);
numberButton.setForeground(dateFontColor) ;
if (j==0 j==6) numberButton.setForeground(weekendFontColor) ;
else numberButton.setForeground(dateFontColor) ;
daysButton[i][j] = numberButton;
result.add(numberButton) ;
actionCommandId ++ ;


return result;


private JDialog createDialog(Frame owner )
JDialog result = new JDialog(owner,"日期时间选择",true) ;
result.setDefaultCloseOperation(JDialog.HIDE_ON_CLOSE);
result.getContentPane().add(this,BorderLayout.CENTER) ;
result.pack() ;
result.setSize(width, height);
return result ;


void showDateChooser(Point position )
Frame owner =(Frame)SwingUtilities.getWindowAncestor(DateChooserJButton.this) ;
if (dialog==null dialog.getOwner()!= owner) dialog = createDialog(owner ) ;
dialog.setLocation(getAppropriateLocation(owner ,position ) ) ;
flushWeekAndDay() ;
dialog.show();


Point getAppropriateLocation(Frame owner ,Point position )
Point result = new Point(position) ;
Point p = owner.getLocation() ;
int offsetX = (position.x+width) - (p.x + owner.getWidth() ) ;
int offsetY = (position.y+height) - (p.y + owner.getHeight() ) ;

if (offsetX >0 )
result.x -= offsetX ;


if (offsetY >0 )

result.y -= offsetY ;


return result ;



private Calendar getCalendar()
Calendar result = Calendar.getInstance();
result.setTime(getDate()) ;
return result ;


private int getSelectedYear()
return ((Integer)yearSpin.getValue()).intValue() ;


private int getSelectedMonth()
return ((Integer)monthSpin.getValue()).intValue() ;


private int getSelectedHour()
return ((Integer)hourSpin.getValue()).intValue() ;


private void dayColorUpdate(boolean isOldDay)
Calendar c = getCalendar() ;
int day = c.get(Calendar.DAY_OF_MONTH);
c.set(Calendar.DAY_OF_MONTH,1);
int actionCommandId =day-2+c.get(Calendar.DAY_OF_WEEK) ;
int i = actionCommandId/7;
int j = actionCommandId%7;
if (isOldDay) daysButton[i][j].setForeground(dateFontColor) ;
else daysButton[i][j].setForeground(todayBackColor) ;


private void flushWeekAndDay()
Calendar c = getCalendar() ;
c.set(Calendar.DAY_OF_MONTH,1);
int maxDayNo = c.getActualMaximum(Calendar.DAY_OF_MONTH);
int dayNo = 2 - c.get(Calendar.DAY_OF_WEEK) ;
for(int i = 0; i < 6; i++)
for(int j = 0; j < 7; j++)
String s="" ;
if (dayNo>=1 && dayNo<=maxDayNo ) s = String.valueOf(dayNo) ;
daysButton[i][j].setText(s) ;
dayNo ++ ;


dayColorUpdate(false) ;


public void stateChanged(ChangeEvent e)
JSpinner source =(JSpinner)e.getSource() ;
Calendar c = getCalendar() ;
if (source.getName().equals("Hour"))
c.set(Calendar.HOUR_OF_DAY, getSelectedHour());
setDate(c.getTime());
return ;


dayColorUpdate(true) ;

if (source.getName().equals("Year"))
c.set(Calendar.YEAR, getSelectedYear());
else
// (source.getName().equals("Month"))
c.set(Calendar.MONTH, getSelectedMonth()-1);
setDate(c.getTime());
flushWeekAndDay() ;


public void actionPerformed(ActionEvent e)
JButton source =(JButton)e.getSource() ;
if (source.getText().length()==0) return ;
dayColorUpdate(true) ;
source.setForeground(todayBackColor) ;
int newDay = Integer.parseInt(source.getText());
Calendar c = getCalendar() ;
c.set(Calendar.DAY_OF_MONTH,newDay);
setDate(c.getTime());




本回答被提问者采纳 参考技术B 上面的程序好强大，这么大一个程序也不知道分几个类来做。。不过应该可以解决你所要的问题。