从windows拖放一个文件到panel中,如何判断那个文件名称? 即如何判断windows的文件拖放?

Question

从windows拖放一个文件到panel中,如何判断那个文件名称?     public void drop(DropTargetDropEvent e) {            try {
            DataFlavor stringFlavor = DataFlavor.stringFlavor;
            Transferable tr = e.getTransferable();
        if(tr.isDataFlavorSupported(DataFlavor.javaFileListFlavor))
                {
               e.acceptDrop (
                        DnDConstants.ACTION_COPY_OR_MOVE);
                    java.util.List fileList = (java.util.List)
                                       tr.getTransferData(DataFlavor.javaFileListFlavor);
            Iterator iterator = fileList.iterator();            while (iterator.hasNext())
                               {
                                 File file = (File)iterator.next();
                                 Hashtable hashtable = new Hashtable();
                                 hashtable.put("name",file.getName());
                                 hashtable.put("url",file.toURL().toString());
                                 hashtable.put("path",file.getAbsolutePath());
                           //      ((DefaultListModel)getModel()).addElement(hashtable);
                               }
                              e.getDropTargetContext().dropComplete(true);
                         } else {
                           System.err.println ("Rejected");
                           e.rejectDrop();
                         }      if(tr.isDataFlavorSupported(stringFlavor))
          {          }              
    }

Answer 1

import javax.swing.*;
import java.awt.*;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.dnd.*;
import java.awt.event.*;
import java.text.*;
import java.util.*;
import java.io.File;
import java.io.IOException;
   //import java.awt.event.*;
   public class  test implements DropTargetListener{
       private JFrame mainFrame;
       private JPanel panel_south,panel_east=new JPanel();       public void test()
       {
          mainFrame = new JFrame("本地性能测试器");
          new DropTarget(panel_east, DnDConstants.ACTION_COPY_OR_MOVE, this);
          mainFrame.getContentPane().add(panel_east);
          mainFrame.setVisible(true);       }             public void drop(DropTargetDropEvent e) {            try {
            DataFlavor stringFlavor = DataFlavor.stringFlavor;
            Transferable tr = e.getTransferable();
        if(tr.isDataFlavorSupported(DataFlavor.javaFileListFlavor))
                {
               e.acceptDrop (
                        DnDConstants.ACTION_COPY_OR_MOVE);
                    java.util.List fileList = (java.util.List)
                                       tr.getTransferData(DataFlavor.javaFileListFlavor);
            Iterator iterator = fileList.iterator();
              System.out.println (iterator);
            while (iterator.hasNext())
                               {
                                 File file = (File)iterator.next();
                                 Hashtable hashtable = new Hashtable();
                                 hashtable.put("name",file.getName());
                                 hashtable.put("url",file.toURL().toString());
                                 hashtable.put("path",file.getAbsolutePath());
                           //      ((DefaultListModel)getModel()).addElement(hashtable);
                               }
                              e.getDropTargetContext().dropComplete(true);
                         } else {
                           System.err.println ("Rejected");
                           e.rejectDrop();
                         }      if(tr.isDataFlavorSupported(stringFlavor))
          {
               String filename = (String) tr.getTransferData(stringFlavor);
        }      }catch(Exception e1)
            {            }
   }       public void dragEnter(DropTargetDragEvent e) {
          }          public void dragExit(DropTargetEvent e) {
          }          public void dragOver(DropTargetDragEvent e) {
          }          public void dropActionChanged(DropTargetDragEvent e) {
          }
 public static void main(String args[])            {
                 test demo=new test();            //    demo.setVisible(true);
            }
   }

Answer 2

hashtable.put("name",file.getName());
这里不是得到文件名了吗？

Answer 3

public void drop(DropTargetDropEvent e) {        if (!isDropAcceptable(e)) {
            e.rejectDrop();
            return;
        }
        e.acceptDrop(DnDConstants.ACTION_COPY);        String filename = "";
        String filenames[] = new String[3];
        ;        try {
            DataFlavor stringFlavor = DataFlavor.stringFlavor;
            Transferable tr = e.getTransferable();
            DataFlavor[] flavors = tr.getTransferDataFlavors();
            if (tr.isDataFlavorSupported(DataFlavor.javaFileListFlavor)) {
                java.util.List fileList = (java.util.List)
                        tr.getTransferData(flavors[0]);
                Iterator iterator = fileList.iterator();
                while (iterator.hasNext()) {
                    File f = (File) iterator.next();
                    filename = f.toString();
                }            } else if (tr.isDataFlavorSupported(stringFlavor)) {                filename = (String) tr.getTransferData(stringFlavor);
            } else {
                e.rejectDrop();
            }            System.out.println(filename + "\n");            if (filename.endsWith(".bqd")) {
                //      e.acceptDrop(DnDConstants.ACTION_COPY_OR_MOVE);
                this.DrawPlot(filename.trim());
                //    textPane.setCaretPosition(0);
                //     e.dropComplete(true);
            } else if (isOurDir(filename)) {                filenames[0] = filename + "\\cpu.bqd";
                filenames[1] = filename + "\\net.bqd";
                filenames[2] = filename + "\\mem.bqd";
                this.DrawPlot(filenames);
                e.dropComplete(true);            } else {
                System.out.println("文件或文件夹不符合规范");
            }        } catch (Exception ufe) {
            ufe.printStackTrace();
        }        e.dropComplete(true);    }