File f = new File(); //创建文件夹

try {

        f.createNewFile();

    } catch (IOException e) {

        // TODO Auto-generated catch block

        e.printStackTrace();

    }//处理异常

FileWriter fw = new FileWriter(“d://abc.txt”);

BufferedWriter bw = new BufferedWriter(fw);//buff流用来缓存数据

bw.writre();//写入数据

//与上面BufferedWriter用法相同

FileReader fr = new FileReader();

BufferedReader br = new BufferedReader(fr);

FileOutputStream fo =new fo();

FileInputStream fs =new FileInputStream();

fs.read();