java move file and edit file content

package com.wonders.utils;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.util.Date;
  
/**
 * Copy all files under the folder (including files under subfolders) to the target (same level) (and edit the files)
 * @author Admin
 *
 */
public class DirErgodic {  
  
    private static int depth = 1;
    private static int size = 1;
      
    /**
     * Copy all files under the folder (including files under subfolders) to the target (same level)
     * @param pathName
     * @param depth
     * @param target
     * @throws IOException
     */
    public static void find(String pathName,int depth,String target) throws IOException{  
        int filecount=0;  
        //Get the File object of pathName  
        
        File dirFile = new File(pathName);  
        //Determine whether the file or directory exists, and output a reminder on the console if it does not exist  
        if (!dirFile.exists()) {  
            System.out.println("do not exit");  
            return ;  
        }  
        File targetDir = new File(target);  
        //Determine whether the file or directory exists, and output a reminder on the console if it does not exist  
        if (!targetDir.exists()) {  
        	targetDir.mkdirs();
        }  
        / / Determine if it is not a directory, then determine whether it is a file, if the file is the output file path  
        if (!dirFile.isDirectory()) {  
            if (dirFile.isFile()) {  
                System.out.println(dirFile.getCanonicalFile());  
            }  
            return ;  
        }  
          
        for (int j = 0; j < depth; j++) {  
            System.out.print("  ");  
        }  
        System.out.print("|--");  
        System.out.println(dirFile.getName());  
        //Get all file names and directory names in this directory  
        String[] fileList = dirFile.list();  
        int currentDepth=depth+1;  
        for (int i = 0; i < fileList.length; i++) {  
            // Traverse the file directory  
            String string = fileList[i];  
            //File("documentName","fileName") is another constructor of File  
            File file = new File(dirFile.getPath(),string);  
            String name = file.getName();  
            //If it is a directory, search depth++, after outputting the directory name, perform recursion  
            if (file.isDirectory()) {  
                //recursive  
                find(file.getCanonicalPath(),currentDepth,target);  
            }else{  
            	
//            	copyFile(file,new File(target+"\\"+name));
            	updateToNewHtmlFile(file,new File(target+"\\"+name));
                //If it is a file, output the file name directly  
                for (int j = 0; j < currentDepth; j++) {  
                    System.out.print("   ");  
                }  
                System.out.print("|--");  
                System.out.println(size+": "+name);  
                size++;  
            }  
        }  
    }  
    
    // copy the file
    public static void copyFile(File sourceFile, File targetFile) throws IOException
    {
        BufferedInputStream inBuff = null;
        BufferedOutputStream outBuff = null;
        try
        {
            inBuff = new BufferedInputStream(new FileInputStream(sourceFile));
            outBuff = new BufferedOutputStream(new FileOutputStream(targetFile));

            byte[] b = new byte[1024 * 5];
            int len;
            while ((len = inBuff.read(b)) != -1)
            {
                outBuff.write(b, 0, len);
            }
            
            outBuff.flush();
        }
        finally
        {
            
            if (inBuff != null)
                inBuff.close();
            if (outBuff != null)
                outBuff.close();
        }
    }
    
    public static boolean updateToNewHtmlFile(File sourceFile, File targetFile) {
		String str = "";
		long beginDate = (new Date()).getTime();
		str = getValue(readfile(sourceFile));
		try {

			BufferedWriter o = new BufferedWriter(new FileWriter(targetFile));
			o.write(str);
			o.close();
			System.out.println("Shared time: " + ((new Date()).getTime() - beginDate)
					+ "ms");
		} catch (IOException e) {
			e.printStackTrace ();
			return false;
		}
		return true;
	}
    
    public static String readfile(File file) {
    	// save the original format
		InputStream input = null;
		try {
			input = new FileInputStream(file);
		} catch (FileNotFoundException e) {
			e.printStackTrace ();
		}
		StringBuffer buffer = new StringBuffer();
		byte[] bytes = new byte[1024];
		try {
			for (int n; (n = input.read(bytes)) != -1;) {
				buffer.append(new String(bytes, 0, n, "GBK"));
			}
		} catch (IOException e) {
			e.printStackTrace ();
		}
		
//output file as one line: kick out blank lines
//		StringBuffer buffer = new StringBuffer();
//		try {
//			String tempStr = "";
// FileInputStream is = new FileInputStream(file);// Read module file
//			BufferedReader br = new BufferedReader(new InputStreamReader(is));
//			while ((tempStr = br.readLine()) != null)
//				buffer.append(tempStr);
//			is.close();
//		} catch (IOException e) {
// e.printStackTrace ();
//		}
		
		
		return buffer.toString();
	}
    
    public static String getValue(String val) {
		String end = "</html>";
		int e = val.indexOf(end)+ end.length();
		return val.substring(0, e);
	}
      
    public static void main(String[] args) throws IOException{  
    	 // Starting time
        Long begin = new Date().getTime();
        find("D:\\source\\annex", depth,"E:\\a");
        
        // End Time
        Long end = new Date().getTime();
        // time consuming
        System.out.println("Time spent: " + (end - begin) / 1000 + " s"+"");
    }  
}