??????????????
????1?????????
???????????InputStream Reader
????д??????OutPutStream Writer
????2???????????????
???????????InputStream OutputStream
???????????Reader    Writer
?????????????????
?????????????????豸??????????ж????????????ó?????д????????????д??????????????????????
????????豸???????????????
??????????????д????????λ??????????????д???κ?????????????????????д????????λ??????????
?????????
????д?????????????????????????д??????????????????????????????????????д???????????Ч????????
????????????????????????????????д??
???????????ж?д???????????(?????IO????п??????IO?????????????????????)
???????????
????FileOutputStream fos = new FileOutputStream("D://xxx.xxx");
????fos.write("dsfdsf".getBytes());//д?????????
????fos.close();           //?????????????????????????????????Flush
????FileInputStream fis = new FileInputStream("D://xxx.xxx");
????fis.read();       //?????????
????fis.close();
???????????
????FileWriter fw = new FileWriter("D:\xxx.txt");
????fw.write("sdfsdfsdf");//???????д???????
????fw.flush();         //д??????Flush??????????д??????豸
????fw.close();         //close????????Flush??
????FileReader fr = new FileReader("D:\xxx.txt");
????fr.read(char[] ch);//?????????????????????
????fr.close();
????????????
???????????????????????????????
????1????????????????????????
????InputStreamReader isr = new InputStreamReader(new FileInputStream("xxx.xxx"));
????2?????????????????????????
????OutputStreamWriter osw = new OutputStreamWriter(new FileOutputStream("xx.xxx"));