java file(io) operations

	public boolean assembleFile(String sFrom, String sTo) throws IOException {

		File formFile = new File(sFrom);
		File toFile = new File(sTo);

		// if the destination file is null or isdirectory then do nothing
		if (toFile == null || toFile.isDirectory()) {
			return false;
		}
		if (formFile.isFile()) {
			BufferedReader br = new BufferedReader(new FileReader(formFile));
			PrintWriter pw = new PrintWriter(new BufferedWriter(new FileWriter(
					toFile)));
			String sTemp = null;
			while ((sTemp = br.readLine()) != null)
				pw.println("<BR>"+sTemp);
			pw.close();
			br.close();
		} else {
			String[] childrenFiles = formFile.list();
			File tempFile = null;
			BufferedReader br = null;
			PrintWriter pw = new PrintWriter(new BufferedWriter(new FileWriter(
					toFile)));
			String sTemp = null;
			for (int i = 0; i < childrenFiles.length; i++) {
				tempFile = new File(sFrom +File.separatorChar
						+ childrenFiles[i]);
				if (tempFile.isFile()) {
					br = new BufferedReader(new FileReader(tempFile));
					pw.println("<br><br><br><br>");
					while ((sTemp = br.readLine()) != null){
						pw.println("<br>"+sTemp);
					}
					
				}
				pw.flush();
			}
			pw.close();
			br.close();
		}
		return true;
	}

	public void assembleFile(File fFrom, File fTo) throws IOException {
		if (fFrom == null || fTo == null || fFrom.isDirectory()
				|| fTo.isDirectory()) {
			return;
		}
		try {
			BufferedReader br = new BufferedReader(new FileReader(fFrom));
			PrintWriter pw = new PrintWriter(new BufferedWriter(new FileWriter(
					fTo)));
			String sTemp = null;
			while ((sTemp = br.readLine()) != null)
				pw.println(sTemp);
			pw.close();
			br.close();
		} catch (EOFException ex) {
			throw ex;
		} catch (IOException ex) {
			throw ex;
		}
	}
	
	/**
	 * Delete all the file or directory whose name contains nameCondition.
	 * 
	 * @param destinationFile specifying the destination file
	 * @param nameCondition specifying search condition
	 * @throws IOException
	 */
	public void deleteFileByName(File destinationFile, String nameCondition) throws IOException{
		//
		if(nameCondition.toLowerCase().indexOf(destinationFile.getName().toLowerCase())>-1){
			deleteFileAlways(destinationFile);
			return;
		}
		File[] files = destinationFile.listFiles();
		for(File file :files){//i=0;i<files.length;i++
			if(nameCondition.toLowerCase().indexOf(file.getName().toLowerCase())>-1){
				deleteFileAlways(file);
			}else if(file.isDirectory()){
				deleteFileByName(file,nameCondition);
			}
		}
	}
	
	/**
	 * Delete the destination file, If it is a directory, delete all child file
	 * of it and then delete it.
	 */
	public boolean deleteFileAlways(File destinationFile) throws IOException {
		if (destinationFile == null) {
			return false;
		} else if (destinationFile.isFile()) {
			destinationFile.delete();
			return true;
		} else {
			File[] files = destinationFile.listFiles();
			for (File file : files) {
				if (file.isFile()) {
					file.delete();
				} else {
					deleteFileAlways(file);
					file.delete();
				}
			}
			destinationFile.delete();
		}
		return true;
	}

public boolean moveFile(String sFrom,String sTo) {
    if(sFrom== null || sTo==null){
    	return false;
    }
    File source_file = new File(sFrom);   
    File dest_file = new File(sTo);   
    if(!source_file.exists()){
         return false;
    }
    return source_file.renameTo(dest_file);   
}