java读写文件

quick reference

read

public static List<String> getAllTxtFiles(String dirLocation){File f = new File(dirLocation);if(!f.isDirectory() && f.getName().endsWith(".txt")){fileList.add(f.getAbsolutePath());}else if(f.isDirectory()){File[] childFiles = f.listFiles();for(File tf : childFiles){getAllTxtFiles(tf.getAbsolutePath());}}return fileList;}

write

private static void writeToFile(String tolocation2) throws IOException {File f = new File(tolocation2);if(!f.isFile()) return;FileWriter fw = new FileWriter(f, false);for(String s : batch){fw.write(s+"\n");}fw.close();}