Java复制文件及复制文件夹

package util;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;public class BackUp { /**      * 复制单个文件      * @param oldPath String 原文件路径 如：c:/fqf.txt      * @param newPath String 复制后路径 如：f:/fqf.txt      * @return boolean      */    public static void copyFile(String oldPath, String newPath) {       try {            int bytesum = 0;            int byteread = 0;            File oldfile = new File(oldPath);            if (oldfile.exists()) { //文件存在时                InputStream inStream = new FileInputStream(oldPath); //读入原文件                FileOutputStream fs = new FileOutputStream(newPath);                byte[] buffer = new byte[1444];                while ( (byteread = inStream.read(buffer)) != -1) {                    bytesum += byteread; //字节数 文件大小                    System.out.println(bytesum);                    fs.write(buffer, 0, byteread);                }                inStream.close();            }        }        catch (Exception e) {            System.out.println("复制单个文件操作出错");            e.printStackTrace();        }    }    /**      * 复制整个文件夹内容      * 将 c:/fqf 下的文件及文件夹复制到 f:/fqf/ff 下     * @param oldPath String 原文件路径 如：c:/fqf       * @param newPath String 复制后路径 如：f:/fqf/ff      * @return boolean      */    public static void copyFolder(String oldPath, String newPath) {        try {           (new File(newPath)).mkdirs(); //如果文件夹不存在 则建立新文件夹            File a=new File(oldPath);            String[] file=a.list();            File temp=null;            for (int i = 0; i < file.length; i++) {               if(oldPath.endsWith(File.separator)){                    temp=new File(oldPath+file[i]);                }                else{                    temp=new File(oldPath+File.separator+file[i]);                }                if(temp.isFile()){                    FileInputStream input = new FileInputStream(temp);                    FileOutputStream output = new FileOutputStream(newPath + "/" +                            (temp.getName()).toString());                    byte[] b = new byte[1024 * 5];                    int len;                    while ( (len = input.read(b)) != -1) {                        output.write(b, 0, len);                    }                    output.flush();                    output.close();                    input.close();                   log.info(newPath + "/" + (temp.getName()).toString());               }                if(temp.isDirectory()){//如果是子文件夹                    copyFolder(oldPath+"/"+file[i],newPath+"/"+file[i]);                }            }        }       catch ( IOException e) {            System.out.println("复制整个文件夹内容操作出错,被覆盖的文件可能被占用  "+e.toString());            e.printStackTrace();        }    }   }