现有一文本文档，千万行，每次读一行进行处理，循环每一行，用BufferedReader好像挺慢的，有什么办法能提高效率呢？
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- Java code
void largeFileIO(String inputFile, String outputFile) { try { BufferedInputStream bis = new BufferedInputStream(new FileInputStream(new File(inputFile))); BufferedReader in = new BufferedReader(new InputStreamReader(bis, "utf-8"), 10 * 1024 * 1024);//10M缓存 FileWriter fw = new FileWriter(outputFile); while (in.ready()) { String line = in.readLine(); fw.append(line + " "); } in.close(); fw.flush(); fw.close(); } catch (IOException ex) { ex.printStackTrace(); }