接着上篇文章

RowSorter：默认情况下，如果启用排序，那么排序时 JTable 将保留基于模型的选择和可变行高度。例如，如果当前选择行 0（就底层模型而言），那么排序之后将选择行 0（就底层模型而言）。选择有可能看起来被更改了，但就底层模型而言它仍然保持不变。模型索引不再可见或者被移除时除外。例如，如果行 0 被过滤掉了，那么选择在排序后将为空。 

package FileTable;import java.awt.Dimension;import java.io.File;import java.util.Comparator;import javax.swing.JTable;import javax.swing.table.TableModel;/** * Created by Administrator on 2016/3/29. */public class FileTable extends JTable {    /**	 * 	 */	private static final long serialVersionUID = 1L;	public FileTable(){        this.setDefaultRenderer(Object.class, new FileTableCellRenderer());        this.setAutoCreateRowSorter(true);        this.getTableHeader().setReorderingAllowed(false);        this.setShowHorizontalLines(false);        this.setShowVerticalLines(false);        setIntercellSpacing(new Dimension(0,0)); //修改单元格间隔，因此也将影响网格线的粗细。        setRowMargin(0);//设置相邻两行单元格的距离    }    @Override    public void setModel(TableModel dataModel) {        super.setModel(dataModel);    }}

package FileTable;import java.awt.Component;import java.io.File;import java.text.DecimalFormat;import java.text.SimpleDateFormat;import java.util.Date;import javax.swing.JLabel;import javax.swing.JTable;import javax.swing.filechooser.FileSystemView;import javax.swing.table.TableCellRenderer;/** * Created by Administrator on 2016/3/29. */public class FileTableCellRenderer extends JLabel implements TableCellRenderer {	private static final long serialVersionUID = 1L;	FileSystemView fileSystemView = FileSystemView.getFileSystemView();    @Override    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {        this.setFont(table.getFont());        setOpaque(true);        setEnabled(table.isEnabled());        if (isSelected) {            this.setBackground(table.getSelectionBackground());            this.setForeground(table.getSelectionForeground());//            fileTable.setShowHorizontalLines(true);//            fileTable.setShowVerticalLines(true);        }        else {            this.setBackground(table.getBackground());            this.setForeground(table.getForeground());//            fileTable.setShowHorizontalLines(false);//            fileTable.setShowVerticalLines(false);        }        if (column == 0)  {            File file = (File) value;            this.setText(fileSystemView.getSystemDisplayName(file));            this.setIcon(fileSystemView.getSystemIcon(file));        }        else if (column == 1) {            long datetime = (long)value;            SimpleDateFormat sdf = new SimpleDateFormat(" yyyy/MM/dd/ HH:mm:ss");            Date date = new Date(datetime);            this.setText(sdf.format(date));            this.setIcon(null);        } else if (column == 2) {            String description = (String)value;            this.setText(description);            this.setIcon(null);        } else if (column == 3) {            long size = (long)value;            String fileSize = FormetFileSize(size);            File file = (File)table.getValueAt(row,0);            if (fileSystemView.isComputerNode(file) || fileSystemView.isDrive(file) || file.isDirectory()){                this.setText(null);            } else {                this.setText(fileSize);            }            this.setIcon(null);        }        return this;    }    public String FormetFileSize(long fileS) {//转换文件大小        DecimalFormat df = new DecimalFormat("#.00");        String fileSizeString = "";        if (fileS == 0){            return fileSizeString;        }        if (fileS < 1024) {            fileSizeString = df.format((double) fileS) + "B";        } else if (fileS < 1048576) {            fileSizeString = df.format((double) fileS / 1024) + "K";        } else if (fileS < 1073741824) {            fileSizeString = df.format((double) fileS / 1048576) + "M";        } else {            fileSizeString = df.format((double) fileS / 1073741824) +"G";        }        return fileSizeString;    }}

DefaultTableModel有4种构造函数， 这里我选择第三种，通过数据的二维数组和表头数组来初始化

package FileTable;import java.io.File;import javax.swing.filechooser.FileSystemView;import javax.swing.table.DefaultTableModel;/** * Created by Administrator on 2016/3/29. */public class FileTableModel extends DefaultTableModel {	private static final long serialVersionUID = 1L;	private static String[] tableHeader = {"名称", "修改日期", "类型", "大小"};    private FileSystemView fileSystemView = FileSystemView.getFileSystemView();    public FileTableModel(Object[][] objects){        super(objects, tableHeader);    }    @Override    public boolean isCellEditable(int row, int column) {        return false;    }    @Override    public Object getValueAt(int row, int column) {        File file = (File) super.getValueAt(row, column);        if (column == 0){            return file;        } else if (column == 1){            return file.lastModified();        } else if (column == 2) {            return fileSystemView.getSystemTypeDescription(file);        } else if (column == 3){            return file.length();        }        return super.getValueAt(row, column);    }}