将日期定位在JTable中的单元格中
在我的表中，我有三行代码，除了最后一列之外，它还输入了JTable中的所有数据。但是我不确定为什么。
`DefaultTableCellRenderer centerRenderer = new DefaultTableCellRenderer();
centerRenderer.setHorizontalAlignment( SwingConstants.CENTER );
myTable.setDefaultRenderer(Object.class, centerRenderer);`
我认为这是因为我使用单独的“DefaultTableCellRenderer”来排序我的日期，但我不确定。
import javax.swing.*;
import java.awt.*;
import java.io.*;
import java.lang.*;
import java.awt.event.*;
///////////
import javax.swing.border.EmptyBorder;
import javax.swing.event.*;
import javax.swing.text.Document;
import javax.swing.table.TableRowSorter;
import java.util.List;
import java.util.ArrayList;
import java.util.Comparator;
///////////
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import static javax.swing.JFrame.EXIT_ON_CLOSE;
import javax.swing.table.*;
public class JtableIe
{
JFrame myMainWindow = new JFrame("Compare Tables");
JPanel firstPanel = new JPanel();
JScrollPane myScrollTable;
JTable myTable;
JTextField srchFld1;
JTextField srchFld2;
TableRowSorter sorter;
JLabel srchLbl1 = new JLabel();
JLabel srchLbl2 = new JLabel();
DefaultTableModel model;
public void runGUI()
{
myMainWindow.setBounds(10, 10, 1296, 756);
myMainWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
myMainWindow.setLayout(new GridLayout(1,1));
createFirstPanel();
myMainWindow.getContentPane().add(firstPanel);
myMainWindow.setVisible(true);
}
public void createFirstPanel()
{
firstPanel.setLayout(null);
srchLbl1.setLocation(0,0);
srchLbl1.setSize(150,26);
srchLbl1.setText("Name Search:");
firstPanel.add(srchLbl1);
srchLbl2.setLocation(660,0);
srchLbl2.setSize(150,26);
srchLbl2.setText("ID Search:");
firstPanel.add(srchLbl2);
String[] aHeaders = {"Name","ID","Number 1","Number 2","Time","Date"};
Object[][] aData = new Object[15][6];
///////Data////////
aData[0][0] = "John";
aData[0][1] = "JS96";
aData[0][2] = "1";
aData[0][3] = "186";
aData[0][4] = "1h 23m";
aData[0][5] = getJavaDate("12-11-2015");
aData[1][0] = "David";
aData[1][1] = "DB36";
aData[1][2] = "2";
aData[1][3] = "111852";
aData[1][4] = "2h 55m";
aData[1][5] = getJavaDate("12-11-2020");
aData[2][0] = "Daniel";
aData[2][1] = "DK73";
aData[2][2] = "3";
aData[2][3] = "2921";
aData[2][4] = "1h 55m";
aData[2][5] = getJavaDate("12-11-2014");
aData[3][0] = "Janis";
aData[3][1] = "JW84";
aData[3][2] = "4";
aData[3][3] = "6512";
aData[3][4] = "12h 26m";
aData[3][5] = getJavaDate("13-11-2015");
aData[4][0] = "Adam";
aData[4][1] = "AF98";
aData[4][2] = "5";
aData[4][3] = "7524";
aData[4][4] = "5h 47m";
aData[4][5] = getJavaDate("11-11-2015");
aData[5][0] = "Matthew";
aData[5][1] = "MB55";
aData[5][2] = "6";
aData[5][3] = "4989";
aData[5][4] = "80h 30m";
aData[5][5] = getJavaDate("11-11-2015");
aData[6][0] = "Lewis";
aData[6][1] = "LS23";
aData[6][2] = "7";
aData[6][3] = "56321";
aData[6][4] = "880h 20m";
aData[6][5] = getJavaDate("11-11-2015");
aData[7][0] = "Mark";
aData[7][1] = "ML49";
aData[7][2] = "8";
aData[7][3] = "97456";
aData[7][4] = "8h 42m";
aData[7][5] = getJavaDate("11-11-2015");
aData[8][0] = "Josh";
aData[8][1] = "JT67";
aData[8][2] = "9";
aData[8][3] = "82135";
aData[8][4] = "56h 13m";
aData[8][5] = getJavaDate("11-11-2015");
aData[9][0] = "Oliver";
aData[9][1] = "OC98";
aData[9][2] = "10";
aData[9][3] = "152";
aData[9][4] = "9h 9m";
aData[9][5] = getJavaDate("11-11-2015");
aData[10][0] = "Tom";
aData[10][1] = "TS97";
aData[10][2] = "11";
aData[10][3] = "100";
aData[10][4] = "0h 0m";
aData[10][5] = getJavaDate("11-11-2015");
aData[11][0] = "Emma";
aData[11][1] = "EBS74";
aData[11][2] = "12";
aData[11][3] = "200";
aData[11][4] = "0h 30m";
aData[11][5] = getJavaDate("11-11-2015");
aData[12][0] = "Lucy";
aData[12][1] = "LK02";
aData[12][2] = "13";
aData[12][3] = "256";
aData[12][4] = "7h 00m";
aData[12][5] = getJavaDate("10001-11-2015");
aData[13][0] = "Patrick";
aData[13][1] = "PM38";
aData[13][2] = "14";
aData[13][3] = "258";
aData[13][4] = "2h 00m";
aData[13][5] = getJavaDate("31-02-2016");
aData[14][0] = "Nicola";
aData[14][1] = "NB70";
aData[14][2] = "15";
aData[14][3] = "987";
aData[14][4] = "100h 56m";
aData[14][5] = getJavaDate("31-02-2015");
//////////////
model = new DefaultTableModel(aData, aHeaders)
{
@Override
public Class<?> getColumnClass(int column)
{
switch (column)
{
case 5: return Date.class;
default: return Object.class;
}
}
@Override
public boolean isCellEditable(int row, int column)
{
//all cells false
return false;
}
};
myTable = new JTable(model);
myTable.setAutoCreateRowSorter(true);
sorter = new TableRowSorter(myTable.getModel());
List sortKeys = new ArrayList();
sortKeys.add(new RowSorter.SortKey(5, SortOrder.ASCENDING));
sorter.setSortKeys(sortKeys);
sorter.setComparator(2, new AlphanumComparator());
sorter.setComparator(3, new AlphanumComparator());
sorter.setComparator(4, new AlphanumComparator());
setRenderers();
myTable.setRowSorter(sorter);
DefaultTableCellRenderer centerRenderer = new DefaultTableCellRenderer();
centerRenderer.setHorizontalAlignment( SwingConstants.CENTER );
myTable.setDefaultRenderer(Object.class, centerRenderer);
DefaultRowSorter sorter = (DefaultRowSorter) myTable.getRowSorter();
myTable.getColumnModel().getColumn(0).setMinWidth(50);
myTable.getColumnModel().getColumn(0).setMaxWidth(100);
myTable.getColumnModel().getColumn(0).setPreferredWidth(75);
myScrollTable = new JScrollPane(myTable);
myScrollTable.setSize(1296,756);
myScrollTable.setLocation(0,25);
System.out.println("Creating compare table");
srchFld1 = new JTextField(10);
srchFld1.setSize(550,26);
srchFld1.setLocation(100,0);
srchFld1.setToolTipText("Enter Name");
firstPanel.add(srchFld1);
srchFld2 = new JTextField(10);
srchFld2.setSize(550,26);
srchFld2.setLocation(740,0);
srchFld2.setToolTipText("Enter ID");
firstPanel.add(srchFld2);
//////////////////////
Document doc = srchFld1.getDocument();
DocumentListener listener = new DocumentListener()
{
@Override
public void insertUpdate(DocumentEvent e)
{
newFilter();
}
@Override
public void removeUpdate(DocumentEvent e)
{
newFilter();
}
@Override
public void changedUpdate(DocumentEvent e)
{
newFilter();
}
};
doc.addDocumentListener(listener);
///////////////
Document docb = srchFld2.getDocument();
DocumentListener listenerb = new DocumentListener() {
@Override
public void insertUpdate(DocumentEvent e)
{
newFilter();
}
@Override
public void removeUpdate(DocumentEvent e)
{
newFilter();
}
@Override
public void changedUpdate(DocumentEvent e)
{
newFilter();
}
};
docb.addDocumentListener(listenerb);
///////////////
firstPanel.add(myScrollTable);
}
private static final DateFormat DATE_FORMAT = new SimpleDateFormat("dd/MM/yyyy");
private void setRenderers()
{
myTable.setDefaultRenderer(Date.class, new DateRenderer());
}
private Date getJavaDate(String s)
{
try
{
SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy");
Date d = sdf.parse(s);
return d;
}
catch (ParseException ex)
{
Logger.getLogger(TableBasic.class.getName()).log(Level.SEVERE, null, ex);
return null;
}
}
private void newFilter()
{
RowFilter rf = null;
try
{
List<RowFilter<Object,Object>> filters = new ArrayList<RowFilter<Object,Object>>(2);
filters.add(RowFilter.regexFilter(srchFld1.getText(), 0));
filters.add(RowFilter.regexFilter(srchFld2.getText(), 1));
rf = RowFilter.andFilter(filters);
}
catch (java.util.regex.PatternSyntaxException e)
{
return;
}
sorter.setRowFilter(rf);
}
public static void main(String[] args)
{
JtableIe ji = new JtableIe();
ji.runGUI();
}
private class DateRenderer extends DefaultTableCellRenderer
{
private static final long serialVersionUID = 1L;
@Override
public Component getTableCellRendererComponent(JTable myTable, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
super.getTableCellRendererComponent(myTable, value, isSelected, hasFocus, row, column);
if (!(value instanceof Date)) {
return this;
}
setText(DATE_FORMAT.format((Date) value));
return this;
}
}
}
我尝试使用此代码
来解决此问题 DefaultTableCellRenderer centerRendererd = new DefaultTableCellRenderer();
centerRendererd.setHorizontalAlignment( JLabel.CENTER );
myTable.getColumnModel().getColumn(5).setCellRenderer( centerRendererd );
然而，它删除了日期的格式，我不想发生。
我将非常感谢您在修复此错误并将“日期”列置于中心而不会丢失任何指定的格式时提供任何帮助。感谢。
2 个答案:
答案 0 :(得分：2)
您尚未在用于日期列的DateRenderer上设置水平对齐方式。例如，在setRenderers方法中：
DateRenderer dr = new DateRenderer();
dr.setHorizontalAlignment(JLabel.CENTER);
myTable.setDefaultRenderer(Date.class, dr);
答案 1 :(得分：1)
对我来说很好：
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.table.*;
import java.awt.geom.*;
public class SSCCE extends JPanel
{
public SSCCE()
{
JTable table = new JTable(5, 5);
table.setValueAt("Center", 0, 0);
DefaultTableCellRenderer centerRenderer = new DefaultTableCellRenderer();
centerRenderer.setHorizontalAlignment( JLabel.CENTER );
table.getColumnModel().getColumn(0).setCellRenderer( centerRenderer );
JScrollPane scrollPane = new JScrollPane( table );
add( scrollPane );
}
private static void createAndShowGUI()
{
JFrame frame = new JFrame("SSCCE");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add( new SSCCE() );
frame.setLocationByPlatform( true );
frame.pack();
frame.setVisible( true );
}
public static void main(String[] args)
{
EventQueue.invokeLater(new Runnable()
{
public void run()
{
createAndShowGUI();
}
});
}
}
我发布了更多内容作为SSCCE应该是什么的示例。
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