我的组件库--java Date Picker 日历 日期选择器

 

import java.awt.Color;
import java.awt.Component;
import java.awt.Font;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Insets;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;

public class JDateSelectPanel extends JPanel {
 String DATE_FORMAT_ALL = "yyyy-MM-dd HH:mm:ss";
 SimpleDateFormat STAND_DATE_FORMAT = new SimpleDateFormat(DATE_FORMAT_ALL);
 String[] heads = { "日", "一", "二", "三", "四", "五", "六" };
 int col = 7;
 int totalday = 42;

 JPanel daypanel = new JPanel();
 JPanel selectpanel = new JPanel();
 Calendar cal = Calendar.getInstance();
 JTextField dayfiled = new JTextField(getCurrentTimeDesc());
 
 JTextField datetime = new JTextField();
 JPopupMenu pop = new JPopupMenu();
 
 public JDateSelectPanel() {
  setLayout(new GridLayout());
  initDayPanel();
  datetime.setHorizontalAlignment(JTextField.CENTER);
  datetime.setText(getCurrentTimeDesc());
  datetime.setEditable(false);
  datetime.addMouseListener(new MouseAdapter() {
   public void mouseReleased(MouseEvent e) {
    if(SwingUtilities.isLeftMouseButton(e)){
     Component component = e.getComponent();
     int y = component.getY()+ component.getHeight();
     pop.show(component, component.getX()+1, y+1);
     pop.setVisible(true);
    }
   }
  });
  add(datetime);
 }
 
 public void initDayPanel(){
  pop.add(selectpanel);
  daypanel.setLayout(new GridLayout(6, 7, 1, 1));
  dayfiled.setHorizontalAlignment(JTextField.CENTER);

  JPanel headpanel = new JPanel();
  headpanel.setLayout(new GridLayout(1, 7, 1, 1));
  JLabel xinqi = null;
  for (int i = 0; i < col; i++) {
   xinqi = new JLabel(heads[i], JLabel.CENTER);
   xinqi.setBorder(BorderFactory.createRaisedBevelBorder());
   xinqi.setFont(new Font("微软雅黑", Font.BOLD, 13));
   headpanel.add(xinqi);
  }

  selectpanel.setLayout(new GridBagLayout());

  selectpanel.add(getButtonPanel(), new GridBagConstraints(0, 0, 1, 1, 1, 0, GridBagConstraints.NORTH, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0));

  selectpanel.add(headpanel, new GridBagConstraints(0, 1, 1, 1, 1, 0, GridBagConstraints.NORTH, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0));

  paintSelectPanel();
 }

 public JPanel getButtonPanel() {
  JPanel buttonpanel = new JPanel();
  buttonpanel.setLayout(new GridBagLayout());

  JButton preyear = new JButton("<<");
  JButton premonth = new JButton("<");
  JButton nextmonth = new JButton(">");
  JButton nextyear = new JButton(">>");

  preyear.addMouseListener(new MouseAdapter() {
   public void mouseReleased(MouseEvent e) {
    cal.add(Calendar.YEAR, -1);
    refreshDayFiled();
   }
  });

  premonth.addMouseListener(new MouseAdapter() {
   public void mouseReleased(MouseEvent e) {
    cal.add(Calendar.MONTH, -1);
    refreshDayFiled();
   }
  });

  nextmonth.addMouseListener(new MouseAdapter() {
   public void mouseReleased(MouseEvent e) {
    cal.add(Calendar.MONTH, 1);
    refreshDayFiled();
   }
  });

  nextyear.addMouseListener(new MouseAdapter() {
   public void mouseReleased(MouseEvent e) {
    cal.add(Calendar.YEAR, 1);
    refreshDayFiled();
   }
  });

  buttonpanel.add(preyear, new GridBagConstraints(0, 0, 1, 1, 0.6, 0, GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0));
  buttonpanel.add(premonth, new GridBagConstraints(1, 0, 1, 1, 1, 0, GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0));

  buttonpanel.add(dayfiled, new GridBagConstraints(2, 0, 3, 1, 1, 1, GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL, new Insets(0, 1, 0, 1), 0, 0));

  buttonpanel.add(nextmonth, new GridBagConstraints(5, 0, 1, 1, 1, 0, GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0));
  buttonpanel.add(nextyear, new GridBagConstraints(6, 0, 1, 1, 0.6, 0, GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0));
  return buttonpanel;
 }

 public void refreshDayFiled() {
  dayfiled.setText(getTimeDesc(cal.getTimeInMillis()));
  dayfiled.repaint();
  paintSelectPanel();
 }

 public void fillSelectPanel() {
  daypanel.removeAll();
  int startindex = getStartIndex();
  int total = startindex + getTotalDays();
  JLabel kong = null;
  for (int i = 0; i < startindex; i++) {
   kong = new JLabel();
   daypanel.add(kong);
  }
  int dayindex = 1;
  for (int i = startindex; i < total; i++) {
   final JLabel day = new JLabel(String.valueOf(dayindex++), JLabel.CENTER);
   day.setBorder(BorderFactory.createRaisedBevelBorder());
   day.addMouseListener(new MouseAdapter() {
    public void mouseEntered(MouseEvent e) {
     day.setBackground(Color.BLUE);
     day.setBorder(BorderFactory.createLoweredBevelBorder());
    }

    public void mouseExited(MouseEvent e) {
     day.setBackground(null);
     day.setBorder(BorderFactory.createRaisedBevelBorder());
    }

    public void mouseReleased(MouseEvent e) {
     if(SwingUtilities.isLeftMouseButton(e)){
      JLabel label = (JLabel)e.getSource();
      day.setBackground(null);
      day.setBorder(BorderFactory.createRaisedBevelBorder());
      int day = Integer.parseInt(label.getText());
      cal.set(Calendar.DAY_OF_MONTH, day);
      datetime.setText(getDateTime());
      pop.setVisible(false);
     }
    }
   });

   if (i % 7 == 0 || (i + 1) % 7 == 0) {
    day.setForeground(Color.RED);
   }
   daypanel.add(day);
  }
  for (int i = total; i < totalday; i++) {
   kong = new JLabel();
   daypanel.add(kong);
  }
  daypanel.updateUI();
 }

 public void paintSelectPanel() {
  fillSelectPanel();
  selectpanel.add(daypanel, new GridBagConstraints(0, 2, 1, 1, 1, 1, GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(0, 0, 0, 0), 0, 0));
 }

 public int getStartIndex() {
  int today = cal.get(Calendar.DAY_OF_MONTH);
  cal.set(Calendar.DAY_OF_MONTH, 1);
  int start = cal.get(Calendar.DAY_OF_WEEK);
  cal.set(Calendar.DAY_OF_MONTH, today);
  return start == 1 ? 1 : (start - 1);
 }

 public int getTotalDays() {
  return cal.getActualMaximum(Calendar.DAY_OF_MONTH);
 }

 public String getDateTime() {
  return getTimeDesc(cal.getTimeInMillis());
 }

 public Calendar getDate() {
  return cal;
 }
 
 public String getCurrentTimeDesc() {
  return STAND_DATE_FORMAT.format(new Date(System.currentTimeMillis()));
 }

 public String getTimeDesc(long time) {
  return STAND_DATE_FORMAT.format(new Date(time));
 }
}

 

测试代码

 

import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;

import javax.swing.JFrame;
import javax.swing.JLabel;

public class test {

 public static void main(String[] args) {
  JFrame mainframe = new JFrame("日期选择器");
  mainframe.setLayout(new GridBagLayout());

  mainframe.add(new JLabel("时间："), new GridBagConstraints(0, 0, 1, 1, 0, 0, GridBagConstraints.EAST, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0));
  
  mainframe.add(new JDateSelectPanel(), new GridBagConstraints(1, 0, 1, 1, 1, 0, GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0));

  mainframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  mainframe.setSize(400, 300);
  mainframe.setVisible(true);
 }
}