关于Sun指南里用TableSorter给JTable排序问题

public class TestSortedTable {
public static void main(String args[]) {
JFrame frame = new JFrame("JTable的排序测试");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// 表格中显示的数据
Object rows[][] = { { "王明", "中国", 44 }, { "姚明", "中国", 25 },
{ "赵子龙", "西蜀", 1234 }, { "曹操", "北魏", 2112 },
{ "Bill Gates", "美国", 45 }, { "Mike", "英国", 33 } };
String columns[] = { "姓名", "国籍", "年龄" };
TableModel model = new DefaultTableModel(rows, columns);
JTable table = new JTable(model);
RowSorter<TableModel> sorter = new TableRowSorter<TableModel>(model);
table.setRowSorter(sorter);
JScrollPane pane = new JScrollPane(table);
frame.add(pane, BorderLayout.CENTER);
frame.setSize(300, 150);
frame.setVisible(true);
}
}

哦，这种方法我会的。我想调用java手册里给出的TableSorter这个类，
并且我修改了手册里TableSorterDemo，用以调用这个类，能够实现
排序。但是作用于我现在项目中的表，就只能显示排序的△、▽，但对
行没有任何操作。

通知模型刷新了吗？fireTableDataChanged();

恩，是的。这步在TableSorter里已经做了。补充一下：我的表模型里只设置了表头和各行的显示格式，
数据都是从数据库里读出来的。

你用的是1.5之前的一个表格排序的例子吧？表格排序，需要模型维护数据，在模型中调用sort方法，实际上就是将表格模型Vector/Object[][]的行号进行变化，最后通知模型刷新

数据排序的事件估计没触发吧要不然就是没有重新render数据

刷新模型的步骤是在TableSorter里做的。

不是1.5之前的版本。TableSorter的源码如下：一次贴不完，分两次贴了。package cn.ac.ia.hitic.MyClient;import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.util.List;import javax.swing.*;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.*;public class TableSorter extends AbstractTableModel
{
protected TableModel tableModel; public static final int DESCENDING = -1;
public static final int NOT_SORTED = 0;
public static final int ASCENDING = 1; private static Directive EMPTY_DIRECTIVE = new Directive(-1, NOT_SORTED); public static final Comparator COMPARABLE_COMAPRATOR = new Comparator()
{
public int compare(Object o1, Object o2)
{
return ((Comparable) o1).compareTo(o2);
}
};
public static final Comparator LEXICAL_COMPARATOR = new Comparator()
{
public int compare(Object o1, Object o2)
{
return o1.toString().compareTo(o2.toString());
}
}; private Row[] viewToModel;
private int[] modelToView; private JTableHeader tableHeader;
private MouseListener mouseListener;
private TableModelListener tableModelListener;
private Map columnComparators = new HashMap();
private List sortingColumns = new ArrayList(); public TableSorter()
{
this.mouseListener = new MouseHandler();
this.tableModelListener = new TableModelHandler();
} public TableSorter(TableModel tableModel)
{
this();
setTableModel(tableModel);
} public TableSorter(TableModel tableModel, JTableHeader tableHeader)
{
this();
setTableHeader(tableHeader);
setTableModel(tableModel);
} private void clearSortingState()
{
viewToModel = null;
modelToView = null;
} public TableModel getTableModel()
{
return tableModel;
} public void setTableModel(TableModel tableModel)
{
if (this.tableModel != null)
{
this.tableModel.removeTableModelListener(tableModelListener);
} this.tableModel = tableModel;
if (this.tableModel != null)
{
this.tableModel.addTableModelListener(tableModelListener);
} clearSortingState();
fireTableStructureChanged();
} public JTableHeader getTableHeader()
{
return tableHeader;
} public void setTableHeader(JTableHeader tableHeader)
{
if (this.tableHeader != null)
{
this.tableHeader.removeMouseListener(mouseListener);
TableCellRenderer defaultRenderer = this.tableHeader.getDefaultRenderer();
if (defaultRenderer instanceof SortableHeaderRenderer)
{
this.tableHeader.setDefaultRenderer(((SortableHeaderRenderer) defaultRenderer).tableCellRenderer);
}
}
this.tableHeader = tableHeader;
if (this.tableHeader != null)
{
this.tableHeader.addMouseListener(mouseListener);
this.tableHeader.setDefaultRenderer(new SortableHeaderRenderer(this.tableHeader.getDefaultRenderer()));
}
} public boolean isSorting()
{
return sortingColumns.size() != 0;
} private Directive getDirective(int column)
{
for (int i = 0; i < sortingColumns.size(); i++)
{
Directive directive = (Directive) sortingColumns.get(i);
if (directive.column == column)
{
return directive;
}
}
return EMPTY_DIRECTIVE;
} public int getSortingStatus(int column)
{
return getDirective(column).direction;
} private void sortingStatusChanged()
{
clearSortingState();
fireTableDataChanged();
if (tableHeader != null)
{
tableHeader.repaint();
}
} public void setSortingStatus(int column, int status)
{
Directive directive = getDirective(column);
if (directive != EMPTY_DIRECTIVE)
{
sortingColumns.remove(directive);
}
if (status != NOT_SORTED)
{
sortingColumns.add(new Directive(column, status));
}
sortingStatusChanged();
} protected Icon getHeaderRendererIcon(int column, int size)
{
Directive directive = getDirective(column);
if (directive == EMPTY_DIRECTIVE)
{
return null;
}
return new Arrow(directive.direction == DESCENDING, size,
sortingColumns.indexOf(directive));
} private void cancelSorting()
{
sortingColumns.clear();
sortingStatusChanged();
} public void setColumnComparator(Class type, Comparator comparator)
{
if (comparator == null)
{
columnComparators.remove(type);
}
else
{
columnComparators.put(type, comparator);
}
} protected Comparator getComparator(int column)
{
Class columnType = tableModel.getColumnClass(column); //针对列中所有的单元格值，返回最具体的超类
Comparator comparator = (Comparator) columnComparators.get(columnType);
if (comparator != null)
{
return comparator;
}
if (Comparable.class.isAssignableFrom(columnType))
{
return COMPARABLE_COMAPRATOR;
}
return LEXICAL_COMPARATOR;
} private Row[] getViewToModel()
{
if (viewToModel == null)
{
int tableModelRowCount = tableModel.getRowCount();
viewToModel = new Row[tableModelRowCount];
for (int row = 0; row < tableModelRowCount; row++)
{
viewToModel[row] = new Row(row);
} if (isSorting())
{
Arrays.sort(viewToModel);
}
}
return viewToModel;
} public int modelIndex(int viewIndex)
{
return getViewToModel()[viewIndex].modelIndex;
} private int[] getModelToView()
{
if (modelToView == null)
{
int n = getViewToModel().length;
modelToView = new int[n];
for (int i = 0; i < n; i++)
{
modelToView[modelIndex(i)] = i;
}
}
return modelToView;
}

// TableModel interface methods public int getRowCount()
{
return (tableModel == null) ? 0 : tableModel.getRowCount();
} public int getColumnCount()
{
return (tableModel == null) ? 0 : tableModel.getColumnCount();
} public String getColumnName(int column)
{
return tableModel.getColumnName(column);
} public Class getColumnClass(int column)
{
return tableModel.getColumnClass(column);
} public boolean isCellEditable(int row, int column)
{
return tableModel.isCellEditable(modelIndex(row), column);
} public Object getValueAt(int row, int column)
{
return tableModel.getValueAt(modelIndex(row), column);
} public void setValueAt(Object aValue, int row, int column)
{
tableModel.setValueAt(aValue, modelIndex(row), column);
} // Helper classes private class Row implements Comparable
{
private int modelIndex; public Row(int index)
{
this.modelIndex = index;
} public int compareTo(Object o)
{
int row1 = modelIndex;
int row2 = ((Row) o).modelIndex; for (Iterator it = sortingColumns.iterator(); it.hasNext();)
{
Directive directive = (Directive) it.next();
int column = directive.column;
Object o1 = tableModel.getValueAt(row1, column);
Object o2 = tableModel.getValueAt(row2, column); int comparison = 0;
// Define null less than everything, except null.
if (o1 == null && o2 == null)
{
comparison = 0;
}
else if (o1 == null)
{
comparison = -1;
}
else if (o2 == null)
{
comparison = 1;
}
else
{
comparison = getComparator(column).compare(o1, o2);
}
if (comparison != 0)
{
return directive.direction == DESCENDING ? -comparison : comparison;
}
}
return 0;
}
} private class TableModelHandler implements TableModelListener
{
public void tableChanged(TableModelEvent e)
{
// If we're not sorting by anything, just pass the event along.
if (!isSorting())
{
clearSortingState();
fireTableChanged(e);
return;
} // If the table structure has changed, cancel the sorting; the
// sorting columns may have been either moved or deleted from
// the model.
if (e.getFirstRow() == TableModelEvent.HEADER_ROW)
{
cancelSorting();
fireTableChanged(e);
return;
} int column = e.getColumn();
if (e.getFirstRow() == e.getLastRow()
&& column != TableModelEvent.ALL_COLUMNS
&& getSortingStatus(column) == NOT_SORTED
&& modelToView != null)
{
int viewIndex = getModelToView()[e.getFirstRow()];
fireTableChanged(new TableModelEvent(TableSorter.this,
viewIndex, viewIndex, column, e.getType()));
return;
} // Something has happened to the data that may have invalidated the row order.
clearSortingState();
fireTableDataChanged();
return;
}
} private class MouseHandler extends MouseAdapter
{
public void mouseClicked(MouseEvent e)
{
JTableHeader h = (JTableHeader) e.getSource();
TableColumnModel columnModel = h.getColumnModel();
int viewColumn = columnModel.getColumnIndexAtX(e.getX());
int column = columnModel.getColumn(viewColumn).getModelIndex();
if (column != -1)
{
int status = getSortingStatus(column);
if (!e.isControlDown())
{
cancelSorting();
}
// Cycle the sorting states through {NOT_SORTED, ASCENDING, DESCENDING} or
// {NOT_SORTED, DESCENDING, ASCENDING} depending on whether shift is pressed.
status = status + (e.isShiftDown() ? -1 : 1);
status = (status + 4) % 3 - 1; // signed mod, returning {-1, 0, 1}
setSortingStatus(column, status);
}
}
} private static class Arrow implements Icon
{
private boolean descending;
private int size;
private int priority; public Arrow(boolean descending, int size, int priority)
{
this.descending = descending;
this.size = size;
this.priority = priority;
} public void paintIcon(Component c, Graphics g, int x, int y)
{
Color color = c == null ? Color.GRAY : c.getBackground();
// In a compound sort, make each succesive triangle 20%
// smaller than the previous one.
int dx = (int) (size / 2 * Math.pow(0.8, priority));
int dy = descending ? dx : -dx;
// Align icon (roughly) with font baseline.
y = y + 5 * size / 6 + (descending ? -dy : 0);
int shift = descending ? 1 : -1;
g.translate(x, y); // Right diagonal.
g.setColor(color.darker());
g.drawLine(dx / 2, dy, 0, 0);
g.drawLine(dx / 2, dy + shift, 0, shift); // Left diagonal.
g.setColor(color.brighter());
g.drawLine(dx / 2, dy, dx, 0);
g.drawLine(dx / 2, dy + shift, dx, shift); // Horizontal line.
if (descending)
{
g.setColor(color.darker().darker());
} else
{
g.setColor(color.brighter().brighter());
}
g.drawLine(dx, 0, 0, 0); g.setColor(color);
g.translate(-x, -y);
} public int getIconWidth()
{
return size;
} public int getIconHeight()
{
return size;
}
} private class SortableHeaderRenderer implements TableCellRenderer
{
private TableCellRenderer tableCellRenderer; public SortableHeaderRenderer(TableCellRenderer tableCellRenderer)
{
this.tableCellRenderer = tableCellRenderer;
} public Component getTableCellRendererComponent(JTable table,
Object value, boolean isSelected, boolean hasFocus, int row,
int column)
{
Component c = tableCellRenderer.getTableCellRendererComponent(
table, value, isSelected, hasFocus, row, column);
if (c instanceof JLabel)
{
JLabel l = (JLabel) c;
l.setHorizontalTextPosition(JLabel.LEFT);
int modelColumn = table.convertColumnIndexToModel(column);
l.setIcon(getHeaderRendererIcon(modelColumn, l.getFont().getSize()));
}
return c;
}
} private static class Directive
{
private int column;
private int direction; public Directive(int column, int direction)
{
this.column = column;
this.direction = direction;
}
}
}

import java.awt.BorderLayout;import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableModel;public class TestSortedTable {
public static void main(String args[]) {
JFrame frame = new JFrame("JTable的排序测试");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// 表格中显示的数据
Object rows[][] = { { "王明", "中国", 44 }, { "姚明", "中国", 25 },
{ "赵子龙", "西蜀", 1234 }, { "曹操", "北魏", 2112 },
{ "Bill Gates", "美国", 45 }, { "Mike", "英国", 33 } };
String columns[] = { "姓名", "国籍", "年龄" };
TableModel model = new DefaultTableModel(rows, columns);
JTable table = new JTable(model);
TableSorter sorter = new TableSorter();
sorter.setTableHeader(table.getTableHeader());
sorter.setTableModel(model);
table.setModel(sorter);
JScrollPane pane = new JScrollPane(table);
frame.add(pane, BorderLayout.CENTER);
frame.setSize(300, 150);
frame.setVisible(true);
}
}看我的调用代码，是可以进行排序的，你是不是没有TableSorter.setTableModel(model);

谢谢你的回复。你给的这个示例程序我知道能正确运行。因为之前我在自己的示例程序中也能正确运行，但是用在现在这个表中就出现问题了。
TableSorter调用现在一时处理不好，我打算使用Table.setRowSorter(new TableRowSorter(Model));
但是出现了一个问题，和之前你回复别人的一模一样。
“用TableRowSorter后点击某列标题可以排序，但有一列全数字还是按字符来排序的，比如:1,10,11,2,3,4 我想让它按数字大小排序怎么办啊？？”
我和这人一样，表头统一是用vector<String>做的，如：Vector<String> data，所以调用data.add()，括号中只能是String，排序也只能依据
String来排了，怎么解决呢？

一样的实现：你可以添加一个 setColumnClasses(Class[])的方法，对表格中的每一列设置其返回类型，如果需要是数值的，是使用 Number.class重写
public CLass getColumnClass(int column){
return classes[i]; //这里根据你的实际情况实现
}修改 protected Comparator getComparator(int column) ;
添加 NumberComparetor进行数值类型的比较，Object o1、o2实际上就是Number类型了，转化成数值就可以了。Best Regards!

调试易

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