黑马程序员:转换流介绍:InputStreamReader、OutputStreamWriter
转换流InputStreamReader:字节流转换为字符流的桥梁OutputStreamWriter:字符流转换为字节流的桥梁键盘录入最常见写法:BufferedReader b = new BufferedReader(new InputStreamReader(System.in));源(InputStream、Reader):键盘录入目的(OutputStr