InputStreamReader reader = new InputStreamReader(fis,"gbk");
FileOutputStream fos = new FileOutputStream("E:\\20180327.txt");
OutputStreamWriter writer = new OutputStreamWriter(fos);//從字節(jié)流轉(zhuǎn)換到字符流,
//如果 不指定編碼格式,默認(rèn)為項目編碼