读取TXT文件的方法

public String uploadTxtInfo(File txtFile, String fileName, User currentUser) throws IOException {        String msg = null;        try {            //构造一个BufferedReader类来读取文件            BufferedReader br = new BufferedReader(new FileReader(txtFile));            String s = null;            while((s = br.readLine())!=null){//使用readLine方法，一次读一行                System.out.println(s);            }            br.close();        } catch (Exception e){            e.printStackTrace();        }        return msg;    }