FileTool （文件工具类）

public class FileTool {


    private static final Log log = LogFactory.getLog(FileTool.class);
    private static final int BUFFER_SIZE = 16 * 1024 ;


    /**
     * 删除目录和文件
     *
     * @param fi
     * @throws IOException
     */
    public static boolean deleteDirectory(File fi) throws IOException {
       if ((null != fi) && (fi.isDirectory() || fi.isFile())) {
           // 如果fi是文件直接删除
           if (fi.isFile()) {
              fi.delete();
              return true;
           } else { // 如果是目录，获取该目录下的所有文件和文件夹
              File[] files = fi.listFiles();
              int sz = files.length;
              for (int i = 0; i < sz; i++) {
                  if (files[i].isDirectory()) {
                     deleteDirectory(files[i]);
                  } else {
                     files[i].delete();
                  }
              }
           }
           return true;
       } else {
           log.error("文件或目录删除失败", new IllegalArgumentException("异常信息: " + fi
                  + " 不是一个目录或文件 "));
           throw new IllegalArgumentException("异常信息: " + fi + " 不是一个目录或文件 ");
       }
    }
   
   
    public static boolean deleteDirectoryAndParent(File fi) throws IOException {
       if ((null != fi) && (fi.isDirectory() || fi.isFile())) {
           // 如果fi是文件直接删除
           if (fi.isFile()) {
              fi.delete();
              return true;
           } else { // 如果是目录，获取该目录下的所有文件和文件夹
              File[] files = fi.listFiles();
              int sz = files.length;
              for (int i = 0; i < sz; i++) {
                  if (files[i].isDirectory()) {
                     deleteDirectoryAndParent(files[i]);
                  } else {
                     files[i].delete();
                  }
              }
           }
           fi.delete();
           return true;
       } else {
           log.error("delete failed");
           throw new IllegalArgumentException("异常信息: " + fi + " 不是一个目录或文件 ");
       }
    }
    /**
     * 根据路径删除文件
     * @param filename
     * @return
     */
    public static boolean deleteFile(String filename){
       File file = new File(filename);
       if(file.exists()){
           return file.delete();
       }
       return false;
    }
   
    /**
     * 创建目录
     * @param directoryName
     * @return boolean
     * @since Jan 6, 2010
     */
    public static boolean createDirectory(String directoryName){
       File file=new File(directoryName);
       try {
           return file.mkdirs();
       } catch (Exception e) {
           log.error("create directory failed",e);
           return false;
       }
    }
   
    /**
     * 文件复制
     * @param src 源文件
     * @param dst 目标文件
     * @since Jan 21, 2010
     */
    public static void copy(File src, File dst) {
       InputStream in = null;
       OutputStream out = null;
       try {
           in = new BufferedInputStream(new FileInputStream(src), BUFFER_SIZE);
           out = new BufferedOutputStream(new FileOutputStream(dst),
                  BUFFER_SIZE);
           byte[] buffer = new byte[BUFFER_SIZE];
           int len = 0;
           while ((len = in.read(buffer)) > 0) {
              out.write(buffer, 0, len);
           }
       } catch (Exception e) {
           e.printStackTrace();
       } finally {
           if (null != in) {
              try {
                  in.close();
              } catch (IOException e) {
                  e.printStackTrace();
              }
           }
           if (null != out) {
              try {
                  out.close();
              } catch (IOException e) {
                  e.printStackTrace();
              }
           }
       }
    }
    /**
     * 根据多媒体文件格式，获取图片文件类型
     * @param mimeType 多媒体文件类型
     * @return String
     * @since Jan 21, 2010
     */
    public static String getPicFileType(String mimeType){
       try {
           String typename = "";
           if (mimeType.equals("image/pjpeg")) {
              typename = ".jpg";
           } else if (mimeType.equals("image/bmp")) {
              typename = ".bmp";
           } else if (mimeType.equals("image/png")) {
              typename = ".png";
           } else if (mimeType.equals("image/gif")) {
              typename = ".gif";
           } else if (mimeType.equals("image/jpeg")) {
              typename = ".jpg";
           } else if (mimeType.equals("image/jpg")) {
              typename = ".jpg";
           } else if (mimeType.equals("image/x-png")) {
              typename = ".png";
           }
           return typename;
       } catch (Exception e) {
           log.error("get pic file type failed",e);
       }
       return null;
    }
   
    /**
     * 修改当前系统毫秒时间
     * @param fileType
     * @return String
     * @since Jan 22, 2010
     */
    public static String getMTimeFileName(String fileType){
       try {
           Calendar cal=Calendar.getInstance();
           long mTime=cal.getTimeInMillis();
           return String.valueOf(mTime)+fileType;
       } catch (Exception e) {
           log.info("get Time In Millis to change the file name failed",e);
       }
       return null;
    }
   
    /**
     * 获取以长日期命名的文件名称
     * @param fileName
     * @return String
     * @since Jan 22, 2010
     */
    @SuppressWarnings("static-access")
    public static String getLongDataFileName(String fileType){
       try {
           Calendar calendar=Calendar.getInstance();
        StringBuffer fileName=new StringBuffer();
        fileName.append(calendar.get(calendar.YEAR));
        fileName.append(calendar.get(calendar.MONTH));
        fileName.append(calendar.get(calendar.DATE));
        fileName.append(calendar.get(calendar.HOUR_OF_DAY));
        fileName.append(calendar.get(calendar.MINUTE));
        fileName.append(calendar.get(calendar.SECOND));
        fileName.append(calendar.get(calendar.MILLISECOND));
        fileName.append(fileType);
        return fileName.toString();
       } catch (Exception e) {
           log.info("get long data to change file name failed",e);
       }
       return null;
    }
}