Question

java如何高效的读取超长字符串

Answer 1

案例：通过测试是最快的了一种

1. 普通IO耗时1.3s
   public static String openStringFileIO(String path, String fileName) {
   long time = System.currentTimeMillis();
   String result = null;
   File f = new File(path, fileName);
   try {
   FileInputStream fileInputStream = new FileInputStream(f);
   StringBuilder buffer = new StringBuilder();
   String line;
   BufferedReader in = new BufferedReader(new InputStreamReader(fileInputStream));
   while ((line = in.readLine()) != null) {
   buffer.append(line);
   }
   result = buffer.toString();
   } catch (IOException e) {
   e.printStackTrace();
   }
   Logger.d("openStringFileIO " + (System.currentTimeMillis() - time));
   return result;
   }