Java操作系统剪切板Clipboard及自定义剪切板

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系统剪切板：

系统剪切板一般支持String文本类型和Image图像类型：

String文本类型

插入：

Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();//获取系统剪切板
    String str = "哈哈";//设置字符串
    StringSelection selection = new StringSelection(str);//构建String数据类型
    clipboard.setContents(selection, selection);//添加文本到系统剪切板

  获取：

Transferable content = clipboard.getContents(null);//从系统剪切板中获取数据
if (content.isDataFlavorSupported(DataFlavor.stringFlavor)) {//判断是否为文本类型
    String text = (String) content.getTransferData(DataFlavor.stringFlavor);//从数据中获取文本值
    if (text == null) {
        return;
    }
    System.out.println(text);

}

 图像类型：

public class ImageSelection implements Transferable{
    private static DataFlavor[] flavors={DataFlavor.imageFlavor};
    private Image image;
    public ImageSelection(Image image) {
        // TODO Auto-generated constructor stub
        this.image=image;
    }
    @Override
    public DataFlavor[] getTransferDataFlavors() {
        // TODO Auto-generated method stub
        return (DataFlavor[])flavors.clone();
    }

    @Override
    public boolean isDataFlavorSupported(DataFlavor flavor) {
        // TODO Auto-generated method stub
        if(DataFlavor.imageFlavor.equals(flavor)){
            return true;
        }
        return false;
    }

    @Override
    public Image getTransferData(DataFlavor flavor) throws UnsupportedFlavorException, IOException {
        // TODO Auto-generated method stub
        if(flavor.equals(DataFlavor.imageFlavor)){
            return image;
        }else{
            throw new UnsupportedFlavorException(flavor);
        }
        
    }

自定义剪切板：

首先需要写一个数据类：

public class TestSelection implements Transferable, ClipboardOwner {
    public static final DataFlavor rangeFlavor = new DataFlavor(RangeDataModel.class, "Report Range");//class为自定义的java类 字串随便
   private static final DataFlavor[] flavors = { rangeFlavor };
    private Object data;
    public TestSelection(Object data) {
        this.data = data;
    }

    @Override
    public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException, IOException {
        if (flavor.equals(flavors[RANGE])) {
            return data;
        } else {
            throw new UnsupportedFlavorException(flavor);
        }
    }

    @Override
    public DataFlavor[] getTransferDataFlavors() {
        return (DataFlavor[]) flavors.clone();
    }

    @Override
    public boolean isDataFlavorSupported(DataFlavor flavor) {
        for (int i = 0; i < flavors.length; i++) {
            if (flavor.equals(flavors[i])) {
                return true;
            }
        }
        return false;
    }

    @Override
    public void lostOwnership(Clipboard clipboard, Transferable contents) {
        // TODO Auto-generated method stub

    }


}

 然后就是设置值：

Clipboard clipboard = new Clipboard("clipboardName");//创建自定义剪切板对象

ReportSelection content = new ReportSelection(data);//构建数据对象 data为数据类型java类的对象
    clipboard.setContents(content, null);

 

获取值：

Transferable content = clipboard.getContents(null);//注意 自定义剪切板必须给null参数
if (content.isDataFlavorSupported(ReportSelection.rangeFlavor)) {
    RangeDataModel data = (RangeDataModel) content.getTransferData(ReportSelection.rangeFlavor);
    System.out.println(data);

}