判断文件是否存在:
/** * 判断文件是否存在 * * @param path 文件路径 * @return [参数说明] * @return boolean [返回类型说明] */ public static boolean isFileExist(String path) { if (TextUtils.isEmpty(path)) { return false; } File file = new File(path); return file.exists(); }
判断文件是否存在时,需要根据文件路径生成一个File对象实例,并对该实例指向的文件存在性进行判断。
读取文件(以“一行”为一个指定信息)内容信息,并返回ArrayList实例:
/** * <功能描述>读取指定目录资源文件,以ArrayList的形式返回文件中每行数据 * * @param fileName * @return [参数说明] * @return List<String> [返回类型说明] */ public static List<String> readTxtFile(String fileName) { List<String> arrayList = new ArrayList<String>(); InputStream inputStream = null; BufferedReader bufferedReader = null; String tempStr = null; try { File file = new File(fileName); inputStream = new FileInputStream(file); bufferedReader = new BufferedReader(new InputStreamReader( inputStream, "utf-8")); } catch (IOException ioException) { LogUtil.d(TAG, "readTxtFile::ioException:" + ioException.getMessage()); } if (bufferedReader == null) { return arrayList; } try { tempStr = bufferedReader.readLine(); while (tempStr != null) { LogUtil.d(TAG, "tmpStr=" + tempStr); arrayList.add(tempStr.trim()); tempStr = bufferedReader.readLine(); } inputStream.close(); bufferedReader.close(); } catch (Exception exception) { LogUtil.d(TAG, "readTxtFile::exception" + exception.getMessage()); } LogUtil.d(TAG, "arrayList.length=" + arrayList.size()); return arrayList; }