java 如何使用WINDOWS下的剪贴板?

如果是JTextArea,JTextField等,用它的copy(),cut(),paste()方法,如果想复制Image或想玩转系统的剪切板,请用java.awt.datatransfer包.

簡單的將String寫入到操作系統的剪貼板中,可以參考:
import java.awt.Toolkit;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.StringSelection;
import java.awt.datatransfer.Transferable;
public class WriteString
{
public static void main(String[] args)
{
Clipboard sysc = Toolkit.getDefaultToolkit().getSystemClipboard();
setClipboardString(sysc,"寫入剪貼板的String");
} protected static void setClipboardString(Clipboard clip, String writeMe) {
Transferable tText = new StringSelection(writeMe);
clip.setContents(tText, null);
} }
由於拷貝String,jdk中已經有類StringSelection支持,如果要拷貝一個文件,或者目錄,則要參考此類,對其進行修改,類名:FileSelection.java (改的可能不是很成功,但能夠用)
 內容為:
/* @(#)FileSelection.java 07/05/14
* @author me
* Copy file from FoxEDM,Paste to System(e.g:2000 or xp etc)
*/
package com.foxera.foxlink.ui;import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.ClipboardOwner;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.io.*;
import java.util.List;
import java.util.ArrayList;
/**
* A <code>Transferable</code> which implements the capability required
* to transfer a <code>String</code>.
*
* This <code>Transferable</code> properly supports
* <code>DataFlavor.javaFileListFlavor</code>
* and all equivalent flavors. Support for
* <code>DataFlavor.plainTextFlavor</code>
* and all equivalent flavors is deprecated. No other
* <code>DataFlavor</code>s are supported.
*
* @see java.awt.datatransfer.DataFlavor#javaFileListFlavor
* @see java.awt.datatransfer.DataFlavor#plainTextFlavor
*/
public class FileSelection implements Transferable, ClipboardOwner { private static final int FILE= 0;
 private static final int PLAIN_FILE = 1; private static final DataFlavor[] flavors = {
 DataFlavor.javaFileListFlavor,
DataFlavor.javaFileListFlavor
 }; private List data;

 /**
 * Creates a <code>Transferable</code> capable of transferring
 * the specified <code>String</code>.
 */
 public FileSelection(List data) {
 this.data = data;
 } /**
 * Returns an array of flavors in which this <code>Transferable</code>
 * can provide the data. <code>DataFlavor.javaFileListFlavor</code>
 * is properly supported.
 * Support for <code>DataFlavor.plainTextFlavor</code> is
 * deprecated.
 *
 * @return an array of length two, whose elements are <code>DataFlavor.
 * stringFlavor</code> and <code>DataFlavor.plainTextFlavor</code>
 */
 public DataFlavor[] getTransferDataFlavors() {
 // returning flavors itself would allow client code to modify
 // our internal behavior
return (DataFlavor[])flavors.clone();
 } /**
 * Returns whether the requested flavor is supported by this
 * <code>Transferable</code>.
 *
 * @param flavor the requested flavor for the data
 * @return true if <code>flavor</code> is equal to
 * <code>DataFlavor.javaFileListFlavor</code> or
 * <code>DataFlavor.plainTextFlavor</code>; false if <code>flavor</code>
 * is not one of the above flavors
 * @throws NullPointerException if flavor is <code>null</code>
 */
 public boolean isDataFlavorSupported(DataFlavor flavor) {
// JCK Test StringSelection0003: if 'flavor' is null, throw NPE
 for (int i = 0; i < flavors.length; i++) {
 if (flavor.equals(flavors[i])) {
 return true;
 }
}
return false;
 } /**
 * Returns the <code>Transferable</code>'s data in the requested
 * <code>DataFlavor</code> if possible. If the desired flavor is
 * <code>DataFlavor.javaFileListFlavor</code>, or an equivalent flavor,
 * the <code>String</code> representing the selection is
 * returned. If the desired flavor is
 * <code>DataFlavor.plainTextFlavor</code>,
 * or an equivalent flavor, a <code>Reader</code> is returned.
 * Note: The behavior of this method for
 * </code>DataFlavor.plainTextFlavor</code>
 * and equivalent <code>DataFlavor</code>s is inconsistent with the
 * definition of <code>DataFlavor.plainTextFlavor</code>.
 *
 * @param flavor the requested flavor for the data
 * @return the data in the requested flavor, as outlined above
 * @throws UnsupportedFlavorException if the requested data flavor is
 * not equivalent to either <code>DataFlavor.stringFlavor</code>
 * or <code>DataFlavor.plainTextFlavor</code>
 * @throws IOException if an IOException occurs while retrieving the data.
 * By default, StringSelection never throws this exception, but a
 * subclass may.
 * @throws NullPointerException if flavor is <code>null</code>
 * @see java.util.ArrayList<E>
 */
 public Object getTransferData(DataFlavor flavor)
 throws UnsupportedFlavorException, IOException
 {
if (flavor.equals(flavors[FILE])) {
 return (Object)data;
} else if (flavor.equals(flavors[PLAIN_FILE])) {
 return new ArrayList<File>(data == null ? null : data);
} else {
 throw new UnsupportedFlavorException(flavor);
}
 } public void lostOwnership(Clipboard clipboard, Transferable contents) {
 }}測試代碼為:
import java.awt.Toolkit;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.Transferable;
import java.util.List;
import java.io.File;
import java.util.ArrayList;
public class WriteFile
{
public static void main(String[] args)
{
Clipboard sysc = Toolkit.getDefaultToolkit().getSystemClipboard();

File file = new File("c:\\1.txt");//目錄也可以
List<File> listFile = new ArrayList<File>();
listFile.add(file);
setClipboardFile(sysc,listFile);
} protected static void setClipboardFile(Clipboard clip, List writeMe) {
Transferable tFile = new FileSelection(writeMe);
clip.setContents(tFile, null);
} }從操作系統的剪貼板中讀取資料,可以參考:
protected static String getClipboardContent(Clipboard clip) throws Exception{
 //get content from clipboard
 Transferable clipT = clip.getContents(null);
 if (clipT != null) {
 // check content's type
 if (clipT.isDataFlavorSupported(DataFlavor.stringFlavor))
 {
 return (String)clipT.getTransferData(DataFlavor.stringFlavor);
 }
 else if(clipT.isDataFlavorSupported(DataFlavor.javaFileListFlavor))
 {
 Object ob = clipT.getTransferData(DataFlavor.javaFileListFlavor);
 List fileList = (List)ob;
 if((fileList != null)&&(fileList.size() > 0))
 {
 for(int k=0;k<fileList.size();k++)
 {
System.out.println(((File)fileList.get(k)).getAbsolutePath());
//根據路徑拷貝文件
 }
 }
 }
 }
 return null;
}

jxl:
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;import jxl.CellType;
import jxl.Sheet;
import jxl.Workbook;
import jxl.format.UnderlineStyle;
import jxl.write.WritableFont;
import jxl.write.WritableWorkbook;
import jxl.write.WritableSheet;
import jxl.write.Label;
import   jxl.write.WritableCellFormat;
public class WriteExcle {
public   static   void   writeExcel(String   sourcefile,String targetfile)   throws   Exception   {
jxl.Workbook   rw   =   jxl.Workbook.getWorkbook(new   File(sourcefile));

  //创建可写入的Excel工作薄对象
  jxl.write.WritableWorkbook     wwb   =   Workbook.createWorkbook(new   File(targetfile),   rw);

  //读取第一张工作表
  jxl.write.WritableSheet   ws   =   wwb.getSheet(0);

  //获得第一个单元格对象
  jxl.write.WritableCell   wc   =   ws.getWritableCell(0,   0);

  //判断单元格的类型,   做出相应的转化
          if   (wc.getType()==CellType.EMPTY)
          {
          System.out.println("runing");
          Label   lp   =   new   Label(2,2,"modify   the   empty");
          ws.addCell(lp);
          }

  //写入Excel对象
  wwb.write();

  //关闭可写入的Excel对象
  wwb.close();

  //关闭只读的Excel对象
  rw.close();    }

    public   static   void   main(String[]   args)     {
        try{
            File   f   =   new   File("c:\\kk.xls");

            writeExcel( "c:\\kk.xls","c:\\kk11.xls");
        }
        catch(Exception   e){
            System.out.println(e.toString());
        }
}
}

poi 操作excleimport java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
public class POIExcel {
public static void main(String args[])
{

try {
POIFSFileSystem fs = new POIFSFileSystem(new FileInputStream("c:\\workbook.xls"));

    HSSFWorkbook wb = new HSSFWorkbook(fs);

    HSSFSheet sheet = wb.getSheetAt(0);

    HSSFRow row = sheet.getRow(0);

    HSSFCell cell = row.getCell((short)0);

    cell.setCellValue("a test");

    // Write the output to a file

    FileOutputStream fileOut = new FileOutputStream("c:\\workbook.xls");

    wb.write(fileOut);

fileOut.close();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}
}

调试易

java 如何使用WINDOWS下的剪贴板?

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