JTable中的JSpinner（时间）

我正试图在JTable中实现一个JSpinner，它在第一次看起来很有效但在失去了单元格的焦点之后，编辑的单元格被设置为“Thu Jan 01 + time + UTC 1970”时间正在设置正确。 如何从时间中删除日期？

这是我的洞SpinnerEditor.class，添加了一些评论。

代码：

public SpinnerEditor(String timeFormat) { super(new JTextField()); // Default Time I want to Display (1 Hour) Time date = new Time(3600000); SpinnerDateModel timeModel = new SpinnerDateModel(date, null, null,Calendar.MINUTE); spinner = new JSpinner(timeModel); editorDate = new JSpinner.DateEditor(spinner, timeFormat); spinner.setEditor(editorDate); editorDate = ((JSpinner.DateEditor)spinner.getEditor()); // println result : "Thu Jan 01 01:00:00 UTC 1970" System.out.println(editorDate.getTextField().getValue()); textField = editorDate.getTextField(); textField.addFocusListener( new FocusListener() { public void focusGained( FocusEvent fe ) { System.err.println("Got focus"); //textField.setSelectionStart(0); //textField.setSelectionEnd(1); SwingUtilities.invokeLater( new Runnable() { public void run() { if ( valueSet ) { textField.setCaretPosition(1); } } }); } public void focusLost( FocusEvent fe ) { } }); textField.addActionListener( new ActionListener() { public void actionPerformed( ActionEvent ae ) { stopCellEditing(); } }); } // Prepares the spinner component and returns it. public Component getTableCellEditorComponent( JTable table, Object value, boolean isSelected, int row, int column ) { if ( !valueSet ) { spinner.setValue(value); } SwingUtilities.invokeLater( new Runnable() { public void run() { textField.requestFocus(); } }); return spinner; } public boolean isCellEditable( EventObject eo ) { System.err.println("isCellEditable"); if ( eo instanceof KeyEvent ) { KeyEvent ke = (KeyEvent)eo; System.err.println("key event: "+ke.getKeyChar()); textField.setText(String.valueOf(ke.getKeyChar())); valueSet = true; } else { valueSet = false; } return true; } // Returns the spinners current value. public Object getCellEditorValue() { return spinner.getValue(); } public boolean stopCellEditing() { System.err.println("Stopping edit"); // after stopcellEditing is called the TextField is being set with the wrong values (Thu Jan 01 01:00:00 UTC 1970) super.stopCellEditing(); try { if( editorNumeric!=null) { editorNumeric.commitEdit(); spinner.commitEdit(); } if( editorDate!=null) { SimpleDateFormat lFormat = new SimpleDateFormat("HH:mm"); textField.setText((spinner.getValue() != null) ? lFormat.format(spinner.getValue()) : ""); } } catch ( java.text.ParseException e ) { JOptionPane.showMessageDialog(null, "Invalid value, discarding."); } return true; } 

Answer 1

你让编辑和渲染器感到困惑。 编辑器是在编辑单元格时显示的小部件。 当不再编辑单元格时，单元格渲染器用于“绘制”单元格。 这一点在本段中都有解释。 我真的建议你阅读它，因为它清楚地解释了如何执行表格渲染。

您应该做的是，为所涉及的列使用Custom CellRenderer，以便它使用您的日期格式化程序。

有关单元格编辑器和单元格渲染器的更多信息，请查看本教程 。

Answer 2

不容易的工作，意味着对于ButtonGroup中的JRadioButtons，简单的JButton和JSpinner，有两种方式

• 使用两个JSpinner（与JButton ei相同）和SpinnerListModel ，在这种情况下，非常希望减少JTable中提到的JButton所需的一堆代码

此代码适用于NumberInstance

 import java.awt.*; import java.util.EventObject; import javax.swing.*; import javax.swing.border.*; import javax.swing.table.*; public class SpinnerColumn extends AbstractCellEditor implements TableCellEditor, TableCellRenderer { private static final long serialVersionUID = 1L; private JSpinner editSpinner, renderSpinner; private JTable table; private String[] list; private Border originalBorder; public SpinnerColumn(JTable table, int column) { editSpinner = new JSpinner(); renderSpinner = new JSpinner(); originalBorder = editSpinner.getBorder(); editSpinner.setBorder(new LineBorder(Color.BLUE)); this.table = table; table.getColumnModel().getColumn(column).setCellEditor(this); } public SpinnerColumn(String[] list, JTable table, int column) { editSpinner = new JSpinner(); editSpinner.setModel(new SpinnerListModel(list)); renderSpinner = new JSpinner(); originalBorder = editSpinner.getBorder(); editSpinner.setBorder(new LineBorder(Color.BLUE)); this.list = list; this.table = table; table.getColumnModel().getColumn(column).setCellEditor(this); } @Override public Object getCellEditorValue() { return editSpinner.getValue(); } @Override public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) { if (list != null) { editSpinner.setValue(list[0]); } else { editSpinner.setValue(0); } if (value != null) { editSpinner.setValue(value); } return editSpinner; } @Override public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) { if (hasFocus) { renderSpinner.setBorder(new LineBorder(Color.BLUE)); } else { renderSpinner.setBorder(originalBorder); } // *** here's where we set the spinner's value if (value == null) { renderSpinner.setValue(0); } else { int intValue = ((Integer) value).intValue(); renderSpinner.setValue(intValue); } return renderSpinner; } @Override public boolean isCellEditable(EventObject evt) { return true; } public static void main(String[] args) { javax.swing.SwingUtilities.invokeLater(new Runnable() { @Override public void run() { JFrame frame = new JFrame("SpinnerColumn"); JPanel panel = new JPanel(new GridLayout(1, 1)); JTable table = new JTable(5, 1); SpinnerColumn spinnerColumn = new SpinnerColumn(table, 0); table.setDefaultRenderer(Object.class, spinnerColumn); panel.add(table); frame.setContentPane(panel); frame.pack(); frame.setVisible(true); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } }); } } 

• 通过在TableCellEditor中重新创建JSpinner

码

 import javax.swing.*; import javax.swing.table.*; import java.util.Date; import java.util.Vector; import java.awt.*; import java.awt.event.*; import java.text.DateFormat; import java.text.SimpleDateFormat; import javax.swing.UIManager.LookAndFeelInfo; public class TableTestPanel extends JPanel { private static final String[] COLUMN_NAMES = {"List ID", "Expiration Date", "Status", "Date Created"}; private static final DateFormat DATE_FORMAT = new SimpleDateFormat("dd/MM/yyyy"); private static final long serialVersionUID = 1L; private static class StatusPanel extends JPanel { private static final long serialVersionUID = 1L; private JRadioButton theSingleOption; private JRadioButton theMarriedOption; private JRadioButton theDivorcedOption; StatusPanel() { super(new GridLayout(3, 1)); setOpaque(true); ButtonGroup buttonGroup = new ButtonGroup(); theSingleOption = new JRadioButton("Single"); theSingleOption.setOpaque(false); add(theSingleOption); buttonGroup.add(theSingleOption); theMarriedOption = new JRadioButton("Married"); theMarriedOption.setOpaque(false); add(theMarriedOption); buttonGroup.add(theMarriedOption); theDivorcedOption = new JRadioButton("Divorced"); theDivorcedOption.setOpaque(false); add(theDivorcedOption); buttonGroup.add(theDivorcedOption); } public Status getStatus() { if (theMarriedOption.isSelected()) { return Status.MARRIED; } else if (theDivorcedOption.isSelected()) { return Status.DIVORCED; } else { return Status.SINGLE; } } public void setStatus(Status status) { if (status == Status.MARRIED) { theMarriedOption.setSelected(true); } else if (status == Status.DIVORCED) { theDivorcedOption.setSelected(true); } else { theSingleOption.setSelected(true); } } } private static class Status { static final Status SINGLE = new Status("Single"); static final Status MARRIED = new Status("Married"); static final Status DIVORCED = new Status("Divorced"); private final String myName; // for debug only private Status(String name) { myName = name; } @Override public String toString() { return myName; } } private static class TableEntry { private static int instanceNumber; private Long theId; private Date theExpirationDate; private Status theStatus; private Date theCreationDate; TableEntry() { instanceNumber++; theId = new Long(instanceNumber); theExpirationDate = new Date(); theStatus = Status.SINGLE; theCreationDate = new Date(); } TableEntry(Long anId, Date anExpirationDate, Status aStatus, Date aCreationDate) { theId = anId; theExpirationDate = anExpirationDate; theStatus = aStatus; theCreationDate = aCreationDate; } public Long getId() { return theId; } public Date getExpirationDate() { return theExpirationDate; } public Status getStatus() { return theStatus; } public Date getCreationDate() { return theCreationDate; } public void setId(Long anId) { theId = anId; } public void setExpirationDate(Date anExpirationDate) { theExpirationDate = anExpirationDate; } public void setStatus(Status aStatus) { theStatus = aStatus; } public void setCreationDate(Date aCreationDate) { theCreationDate = aCreationDate; } } private static class MyTableModel extends AbstractTableModel { private static final long serialVersionUID = 1L; private Vector