import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.util.Calendar;public class SendServer {    private int num = 0;        public void process() {                Calendar calendar = Calendar.getInstance();        String dir = calendar.get(Calendar.YEAR) + "" + getTimeString(calendar.get(Calendar.MONTH) + "");        String oldPath = "/img2" + dir;        String newPath = "/img5" + dir;                try {            while(true){                System.out.println("复制 " + oldPath + " 目录开始");                long t1 = System.currentTimeMillis();                                num = 0;                copyFolder(oldPath, newPath);                                long t2 = System.currentTimeMillis();                System.out.println("复制目录结束，用时：" + (t2-t1) + "ms,共复制：" + num + "文件");            }        } catch (Exception ex) {            ex.printStackTrace();        }    }    public void copyFolder(String oldPath, String newPath) {                try {            File mFile = new File(newPath);            if(!mFile .exists()){                (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()) {                    String fileName = newPath + "/" + (temp.getName()).toString();                    File testFile = new File(fileName);                    if (!testFile.exists()) {                        FileInputStream input = new FileInputStream(temp);                        FileOutputStream output = new FileOutputStream(fileName);                        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();                        num++;                    }                }                if (temp.isDirectory()) {// 如果是子文件夹                    copyFolder(oldPath + "/" + file[i], newPath + "/" + file[i]);                }            }        } catch (Exception e) {            System.out.println("复制整个文件夹内容操作出错");            e.printStackTrace();        }    }        private String getTimeString(String time){        if(time.length()<2){            return "0" + time;        }        else{            return time;        }    }}