在JSpinner上格式化日期
我有一个格式为yyyy-MM-dd hh:mm:ss的jspinner。 问题是微调器’hh’只能达到’12’的值。 我该怎么做才能达到24小时？
你为JSpinner定义了两件事（基本上教程的内容完全回答了你的问题）
-
的SimpleDateFormat
-
SpinnerDateModel
例如
import java.awt.*; import java.text.SimpleDateFormat; import java.util.*; import javax.swing.*; import javax.swing.event.*; public class TimeZoneSpinners { private final String[] zones = {"Asia/Tokyo", "Asia/Hong_Kong", "Asia/Calcutta", "Europe/Paris", "Europe/London", "America/New_York", "America/Los_Angeles" }; private final JLabel[] labels = new JLabel[zones.length]; private final SimpleDateFormat[] formats = new SimpleDateFormat[zones.length]; private JSpinner spinner; private SpinnerDateModel model; private SimpleDateFormat format; private JPanel panel; private JFrame frame = new JFrame(); public void makeUI() { Calendar cal = Calendar.getInstance(); Date date = cal.getTime(); model = new SpinnerDateModel(); model.setValue(date); spinner = new JSpinner(model); spinner.addChangeListener(new ChangeListener() { @Override public void stateChanged(ChangeEvent e) { Date date = (Date) ((JSpinner) e.getSource()).getValue(); for (int i = 0; i < labels.length; i++) { labels[i].setText(formats[i].format(date)); } } }); format = ((JSpinner.DateEditor) spinner.getEditor()).getFormat(); format.setTimeZone(TimeZone.getTimeZone(zones[0])); format.applyPattern("yyyy-MM-dd HH:mm:ss"); panel = new JPanel(new GridLayout(zones.length, 2, 10, 10)); for (int i = 0; i < zones.length; i++) { formats[i] = new SimpleDateFormat("yyyy-MMM-dd HH:mm:ss"); formats[i].setTimeZone(TimeZone.getTimeZone(zones[i])); JLabel label = new JLabel(zones[i]); labels[i] = new JLabel(formats[i].format(date)); panel.add(label); panel.add(labels[i]); } frame.setLayout(new BorderLayout(10, 10)); frame.add(spinner, BorderLayout.NORTH); frame.add(panel, BorderLayout.CENTER); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.pack(); frame.setVisible(true); } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { @Override public void run() { new TimeZoneSpinners().makeUI(); } }); } }
JSpinner.DateEditor组件使用与SimpleDateFormat相同的格式。
看看SimpleDateFormat格式。
您的格式字符串应为：
yyyy-MM-dd HH:mm:ss
它简单易用……
Date datenow = Calendar.getInstance().getTime(); SpinnerDateModel smb = new SpinnerDateModel(datenow, null, null, Calendar.HOUR_OF_DAY); SPIN_DATE.setModel(smb); JSpinner.DateEditor d = new JSpinner.DateEditor(SPIN_DATE, "dd-MMM-yyyy"); SPIN_DATE.setEditor(d);