/*
* 定义为传输操作提供数据所使用的类的接口
* 专用于java.io.File类型
*/
package angel.datatransfer;import java.awt.datatransfer.*;
import java.io.*;import angel.*;public class FileTransfer implements Transferable
{
private File file;public FileTransfer(File file)
{this.file=file;
}public Object getTransferData(DataFlavor flavor)
{if(isDataFlavorSupported(flavor)){return file;}else{return null;}
}public DataFlavor[] getTransferDataFlavors()
{return new DataFlavor[] {new DataFlavor(file.getClass(),DataFlavor.javaJVMLocalObjectMimeType)};
}public boolean isDataFlavorSupported(DataFlavor flavor)
{return flavor.isMimeTypeEqual(DataFlavor.javaJVMLocalObjectMimeType);
}
}//在点击“复制”菜单是，调用：

Transferable trans = new FileTransfer(this.getSelectedFile());Toolkit.getDefaultToolkit().getSystemClipboard().setContents(trans, null);//返回Clipboard剪切板当前的数据
public Object getClipboardData()
{try{      Transferable tran=Toolkit.getDefaultToolkit().getSystemClipboard().getContents(null);if(tran.isDataFlavorSupported(new DataFlavor(DataFlavor.javaJVMLocalObjectMimeType))){Object obj=tran.getTransferData(new DataFlavor(DataFlavor.javaJVMLocalObjectMimeType));if(obj instanceof File){return (File)obj;}else{return null;}}else{return null;}}catch(Exception err){      err.printStackTrace();return null;}
}

//开启系统剪切板的侦听器,侦听器的目标Clipboard更改时调用Toolkit.getDefaultToolkit().getSystemClipboard().addFlavorListener(this);//开启系统剪切板的侦听器,侦听器的目标Clipboard更改时调用public void flavorsChanged(FlavorEvent e){try{      Transferable tran=Toolkit.getDefaultToolkit().getSystemClipboard().getContents(null);       System.out.println(tran);}catch(Exception err){err.printStackTrace();}}