项目中运用到的对文件的操作

/**     * 获取本地文件的数据     *      * @param file     * @return     */    public static String getLocalDataByFile(File fileName) {        ByteArrayOutputStream out = new ByteArrayOutputStream();        FileInputStream in;        try {            in = new FileInputStream(fileName);            byte buf[] = new byte[in.available()];            in.read(buf);            out.write(buf);            in.close();            out.close();        } catch (IOException e) {        }        return out.toString();    }/**     * 读取字节文件     *      * @param pathName     * @return     */    public static byte[] getByteForFile(File inFile) throws IOException{        FileInputStream in= new FileInputStream(inFile);        byte[] buf = new byte[in.available()];        in.read(buf);        in.close();        return buf;    }    /**     * 下载文件到本地路径file中     *      * @param file     *            保存的路径     * @param str     *            要保存的字符串     * @return     */    public static boolean downFile(File fileName, String str) {        if (!fileName.getParentFile().exists()) {            fileName.getParentFile().mkdirs();        }        boolean res = true;        byte[] content = str.getBytes();        try {            FileOutputStream out = new FileOutputStream(fileName);            out.write(content);            out.close();        } catch (IOException e) {            res = false;            e.printStackTrace();        }        return res;    }/**     * 删除整个目录     * @param file     * @return     */    public static void deleteFile(File file){        if(file.exists()){            if(file.listFiles()!=null){                for(File f:file.listFiles()){                    f.delete();                }            }            file.delete();        }    }    /**     * 删除目录中的文件     * @param path     */    public static void deleteDirectory(String path){        File dir=new File(path);        if(dir.exists()){            if(dir.listFiles()!=null){                for(File f:dir.listFiles()){                    if(f.isDirectory()){                        deleteFile(f);                    }else if(f.isFile())                        f.delete();                }            }            dir.delete();        }    }    /**     * 对一个文件进行Base64编码     * @param file     * @return     */    public static String encodeToString(File file){        StringBuffer sb=new StringBuffer();        if(file.exists()){            FileInputStream is=null;            byte[] buffer=new byte[1024];            try {                is=new FileInputStream(file);                int c=0;                while((c=is.read(buffer))!=-1){                    sb.append(Base64.encodeToString(buffer, 0, c, Base64.DEFAULT));                }                is.close();            } catch (FileNotFoundException e) {                // TODO Auto-generated catch block                e.printStackTrace();            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }        }        return sb.toString();    }    /**     * 删除图谱文件     */    public static void deleteEcgFile(File file){        if(file!=null && file.exists()){            File parentFile=file.getParentFile();            file.delete();            if(parentFile!=null && parentFile.listFiles().length <= 0){//当目录中不存在子文件时，删除目录                parentFile.delete();            }        }    }    /**     * 获取一个目录中最长时间没有被改动的文件     * @param file     */    public static File findOldFile(File file){        File oldFile = file.listFiles()[0];        long modifiedTime = file.listFiles()[0].lastModified();        for(File f:file.listFiles()){//找出修改时间最小的文件            if(f.lastModified() < modifiedTime){                oldFile=f;            }            modifiedTime=f.lastModified();        }        return oldFile;    }    /**     * 删除一个目录中的所有文件     * @param dir     */    public static void deleteFileList(File dir){        if(dir.exists()&&dir.listFiles().length>0){            for(File f:dir.listFiles()){                f.delete();            }        }    } /** 移动文件     * @param src     * @param dest     */    public static boolean moveFile(String src, String dest) {        File srcFolder = new File(src);        File destFolder = new File(dest);        if(!destFolder.exists())            destFolder.mkdirs();        File newFile = new File(destFolder.getAbsoluteFile() + "/" + srcFolder.getName());        boolean res = srcFolder.renameTo(newFile);        return res;    }    public static boolean saveFile(String text, String path){        File file = new File(path);        if(!file.getParentFile().exists())            file.getParentFile().mkdirs();        FileOutputStream out = null;        boolean result = false;        try {            out = new FileOutputStream(file);            out.write(text.getBytes());            result = true;        } catch (FileNotFoundException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }finally{            try {                if(out != null)                    out.close();            } catch (IOException e) {                e.printStackTrace();            }        }        return result;    }    /**     * 获取一个文本     * @param inputStream     * @return     */    public static String readTextFile(InputStream inputStream) {        BufferedReader reader = null;        StringBuffer sb = new StringBuffer();        try {            reader = new BufferedReader(new InputStreamReader(inputStream, "GBK"));            String s ="";            while((s = reader.readLine()) != null){                sb.append(s + "\r\n");            }            inputStream.close();            reader.close();        } catch (IOException e) {            LogHelper.saveExceptionStackInfo(e);        }        return sb.toString();    }    /**     * 截取字节数组     * @param src     * @param begin     * @param count     * @return     */    public static byte[] subBytes(byte[] src, int begin, int count) {        byte[] bs = new byte[count];        for (int i = begin; i < begin + count; i++)            bs[i - begin] = src[i];        return bs;    }    /**      * 文件转化为字节数组      *       * @param file      * @return      */      public static byte[] getBytesFromFile(File file) {        byte[] ret = null;        try {            if (file == null) {                // log.error("helper:the file is null!");                return null;            }            FileInputStream in = new FileInputStream(file);            ByteArrayOutputStream out = new ByteArrayOutputStream(4096);            byte[] b = new byte[4096];            int n;            while ((n = in.read(b)) != -1) {                out.write(b, 0, n);            }            in.close();            out.close();            ret = out.toByteArray();        } catch (IOException e) {            // log.error("helper:get bytes from file process error!");            e.printStackTrace();        }        return ret;    }      /**     * 把字节数组保存为一个文件     *      * @param b     * @param outputFile     * @return     */    public static File getFileFromBytes(byte[] b, String outputFile) {        File ret = null;        BufferedOutputStream stream = null;        try {            ret = new File(outputFile);            FileOutputStream fstream = new FileOutputStream(ret);            stream = new BufferedOutputStream(fstream);            stream.write(b);        } catch (Exception e) {            // log.error("helper:get file from byte process error!");            e.printStackTrace();        } finally {            if (stream != null) {                try {                    stream.close();                } catch (IOException e) {                    // log.error("helper:get file from byte process error!");                    e.printStackTrace();                }            }        }        return ret;    }