JAVA 学习笔记 - 粘贴板+拖拽

所在包 ：java.awt.datatransfer

重要接口和类：Clipboard,ClipboardOwner,Tansferable,DataFlavor,StringSelection,FlaverListener,FlavorEvent

创建系统粘贴板 ：Clipboard c = Toolkit.getDefaultToolkit().getSystemClipboard();

创建本地: new Clipboard("cb");

StringSelection st = new StringSelection(targetStr);

//

clipboard.setContents(st , null);

// 读取

if(clipboard.isDataFlavorAvailable(DataFlavor.stringFlavor)){

  String conteng = (String)clipboard.getData(DataFlavor.stringFlavor);

}

图片、其他对象继承  Transferable 接口

针对对象，需采用 mimeType,可使用 application/x-java-jvm-local-objectref;class=对象类名

Transferable 接口实现：public DataFlaver[] getTransferDataFlavors(){} 

public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException{}

拖拽

DrapTarget(Component c,int ops , DropTargetListener dt1);事件有dragEnter，dragExit，dragOver，drop；Listener继承 DropTargetAdapter类实现

DragSource，调用DragSource.getDefaultDragSource();

dragSource.createDefaultDragGestureRecognizer()//转为拖拽源