java按行读取文件并输出到控制台

publicstaticvoid main(String[] args) throws IOException {

        /*

         * 1.打开一个file

         * 2.new一个InputStreamReader←FileInputStream←file

         * 3.用BufferedReader（←InputStreamReader）的readLine()方法读取

         * */

        File ctoFile = new File("C://Users//gl//Desktop//ku//51cto.txt");

        InputStreamReader rdCto = new InputStreamReader(new FileInputStream(ctoFile));

        BufferedReader bfReader = new BufferedReader(rdCto);

        String txtline = null;

        while ((txtline = bfReader.readLine()) != null) {

            System.out.println(txtline);

        }

        bfReader.close();

    };