使用Java Swing的日歷顯示

Question

我正在使用java swing（一個獨立的應用程序）中的一個出勤項目，該項目在每位員工使用其用戶ID和密碼登錄時都會更新其出勤。

每天僅參加一次。

現在，我想顯示一個日歷，其中他登錄的日子與未登錄的日子標記為不同的顏色（這意味着他缺席那些未登錄的日子）。

我當前的狀態是在日歷中的鏈接http://devajkumarsuthapalli.blogspot.in/2013/06/my-java-project_20.html ，例如http://tinyurl.com/ps23csu

我想看到以不同顏色登錄的員工和以不同顏色登錄的缺勤員工

Answer 1

您將必須創建自己的Calendar組件，以便可以將日期設置為不同的顏色。

這是我為我的一個項目創建的日歷。

這是產生日歷的MonthPanel代碼。 現在，它突出顯示了當前日期。 您可以對其進行修改以突出顯示您的員工登錄的日期。

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.SystemColor;
import java.util.Calendar;

import javax.swing.BorderFactory;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class MonthPanel extends JPanel {

    private static final long   serialVersionUID    = 1L;

    protected int               month;
    protected int               year;

    protected String[]          monthNames          = { "January", "February",
            "March", "April", "May", "June", "July", "August", "September",
            "October", "November", "December"       };

    protected String[]          dayNames            = { "S", "M", "T", "W",
            "T", "F", "S"                           };

    public MonthPanel(int month, int year) {
        this.month = month;
        this.year = year;

        this.add(createGUI());
    }

    protected JPanel createGUI() {
        JPanel monthPanel = new JPanel(true);
        monthPanel.setBorder(BorderFactory
                .createLineBorder(SystemColor.activeCaption));
        monthPanel.setLayout(new BorderLayout());
        monthPanel.setBackground(Color.WHITE);
        monthPanel.setForeground(Color.BLACK);
        monthPanel.add(createTitleGUI(), BorderLayout.NORTH);
        monthPanel.add(createDaysGUI(), BorderLayout.SOUTH);

        return monthPanel;
    }

    protected JPanel createTitleGUI() {
        JPanel titlePanel = new JPanel(true);
        titlePanel.setBorder(BorderFactory
                .createLineBorder(SystemColor.activeCaption));
        titlePanel.setLayout(new FlowLayout());
        titlePanel.setBackground(Color.WHITE);

        JLabel label = new JLabel(monthNames[month] + " " + year);
        label.setForeground(SystemColor.activeCaption);

        titlePanel.add(label, BorderLayout.CENTER);

        return titlePanel;
    }

    protected JPanel createDaysGUI() {
        JPanel dayPanel = new JPanel(true);
        dayPanel.setLayout(new GridLayout(0, dayNames.length));

        Calendar today = Calendar.getInstance();
        int tMonth = today.get(Calendar.MONTH);
        int tYear = today.get(Calendar.YEAR);
        int tDay = today.get(Calendar.DAY_OF_MONTH);

        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.MONTH, month);
        calendar.set(Calendar.YEAR, year);
        calendar.set(Calendar.DAY_OF_MONTH, 1);

        Calendar iterator = (Calendar) calendar.clone();
        iterator.add(Calendar.DAY_OF_MONTH,
                -(iterator.get(Calendar.DAY_OF_WEEK) - 1));

        Calendar maximum = (Calendar) calendar.clone();
        maximum.add(Calendar.MONTH, +1);

        for (int i = 0; i < dayNames.length; i++) {
            JPanel dPanel = new JPanel(true);
            dPanel.setBorder(BorderFactory.createLineBorder(Color.BLACK));
            JLabel dLabel = new JLabel(dayNames[i]);
            dPanel.add(dLabel);
            dayPanel.add(dPanel);
        }

        int count = 0;
        int limit = dayNames.length * 6;

        while (iterator.getTimeInMillis() < maximum.getTimeInMillis()) {
            int lMonth = iterator.get(Calendar.MONTH);
            int lYear = iterator.get(Calendar.YEAR);

            JPanel dPanel = new JPanel(true);
            dPanel.setBorder(BorderFactory.createLineBorder(Color.BLACK));
            JLabel dayLabel = new JLabel();

            if ((lMonth == month) && (lYear == year)) {
                int lDay = iterator.get(Calendar.DAY_OF_MONTH);
                dayLabel.setText(Integer.toString(lDay));
                if ((tMonth == month) && (tYear == year) && (tDay == lDay)) {
                    dPanel.setBackground(Color.ORANGE);
                } else {
                    dPanel.setBackground(Color.WHITE);
                }
            } else {
                dayLabel.setText(" ");
                dPanel.setBackground(Color.WHITE);
            }
            dPanel.add(dayLabel);
            dayPanel.add(dPanel);
            iterator.add(Calendar.DAY_OF_YEAR, +1);
            count++;
        }

        for (int i = count; i < limit; i++) {
            JPanel dPanel = new JPanel(true);
            dPanel.setBorder(BorderFactory.createLineBorder(Color.BLACK));
            JLabel dayLabel = new JLabel();
            dayLabel.setText(" ");
            dPanel.setBackground(Color.WHITE);
            dPanel.add(dayLabel);
            dayPanel.add(dPanel);
        }

        return dayPanel;
    }

}

這是我用來生成JFrame來顯示MonthPanel 。

import java.awt.FlowLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JFrame;
import javax.swing.SwingUtilities;

public class CalendarFrame implements Runnable {

    private JFrame  frame;

    @Override
    public void run() {
        // Month is zero based
        MonthPanel panel = new MonthPanel(5, 2013);

        frame = new JFrame();
        frame.setTitle("Calendar");
        frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent event) {
                exitProcedure();
            }
        });

        frame.setLayout(new FlowLayout());
        frame.add(panel);
        frame.pack();
        // frame.setBounds(100, 100, 400, 200);
        frame.setVisible(true);
    }

    public void exitProcedure() {
        frame.dispose();
        System.exit(0);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new CalendarFrame());

    }

}

Answer 2

LGoodDatePicker庫包含CalendarPanel組件，該組件允許程序員（可選）指定多色“ HighlightPolicy”。 通過使用HighlightPolicy，程序員可以為每個突出顯示的日期選擇背景色，前景色和（可選）工具提示文本。 （提供的顏色可以全部相同，或每個日期唯一。）在您使用時，突出顯示的顏色可以用於指示員工出勤。

公開披露：我是主要開發商。

我粘貼了帶有多色HighlightPolicy（和VetoPolicy）的CalendarPanel屏幕截圖。

除了CalendarPanel之外，該庫還具有DatePicker，TimePicker和DateTimePicker組件。 我提供了所有庫組件（和演示應用程序）的屏幕截圖。

該庫可以從項目發布頁面安裝到Java項目中。

該項目的主頁位於Github上，網址為：
https://github.com/LGoodDatePicker/LGoodDatePicker 。

（單擊以放大演示圖像。）