【Java】【17】读取粘贴板的内容

package com.test.jvm.oom.design;

import java.awt.Image;
import java.awt.Toolkit;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.StringSelection;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.Reader;

public class Test {
    
    /**
     *1. 从剪切板获得文字。
     */
    public static String getSysClipboardText() {
        String ret = "";
        Clipboard sysClip = Toolkit.getDefaultToolkit().getSystemClipboard();
        // 获取剪切板中的内容
        Transferable clipTf = sysClip.getContents(null);

        if (clipTf != null) {
            // 检查内容是否是文本类型
            if (clipTf.isDataFlavorSupported(DataFlavor.stringFlavor)) {
                try {
                    ret = (String) clipTf
                            .getTransferData(DataFlavor.stringFlavor);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }

        return ret;
    }

    /**
     * 2.将字符串复制到剪切板。
     */
    public static void setSysClipboardText(String writeMe) {
        Clipboard clip = Toolkit.getDefaultToolkit().getSystemClipboard();
        Transferable tText = new StringSelection(writeMe);
        clip.setContents(tText, null);
    }

    /**
     *3. 从剪切板获得图片。
     */
    public static Image getImageFromClipboard() throws Exception {
        Clipboard sysc = Toolkit.getDefaultToolkit().getSystemClipboard();
        Transferable cc = sysc.getContents(null);
        if (cc == null)
            return null;
        else if (cc.isDataFlavorSupported(DataFlavor.imageFlavor))
            return (Image) cc.getTransferData(DataFlavor.imageFlavor);
        return null;
        
    }

    /**
     * 4.复制图片到剪切板。
     */
    public static void setClipboardImage(final Image image)throws Exception {
        Transferable trans = new Transferable() {
            public DataFlavor[] getTransferDataFlavors() {
                return new DataFlavor[] { DataFlavor.imageFlavor };
            }

            public boolean isDataFlavorSupported(DataFlavor flavor) {
                return DataFlavor.imageFlavor.equals(flavor);
            }

            public Object getTransferData(DataFlavor flavor)
                    throws UnsupportedFlavorException, IOException {
                if (isDataFlavorSupported(flavor))
                    return image;
                throw new UnsupportedFlavorException(flavor);
            }

        };
        Toolkit.getDefaultToolkit().getSystemClipboard().setContents(trans,
                null);
    }

    /**
     * 5.通过流获取，可读取图文混合
     */
    public void getImageAndTextFromClipboard() throws Exception{
        Clipboard sysClip = Toolkit.getDefaultToolkit().getSystemClipboard();
        Transferable clipTf = sysClip.getContents(null);
        DataFlavor[] dataList = clipTf.getTransferDataFlavors();
        int wholeLength = 0;
        for (int i = 0; i < dataList.length; i++) {
            DataFlavor data = dataList[i];
            if (data.getSubType().equals("rtf")) {
                Reader reader = data.getReaderForText(clipTf);
                OutputStreamWriter osw = new OutputStreamWriter(
                        new FileOutputStream("d:\\test.rtf"));
                char[] c = new char[1024];
                int leng = -1;
                while ((leng = reader.read(c)) != -1) {
                    osw.write(c, wholeLength, leng);
                }
                osw.flush();
                osw.close();
            }
        }
    }
}