字节流字符流与缓冲流的对应

记一下用得到的，容易乱

字节流	对应缓冲流
FileInputStream	BufferedInputStram
FileOutputStream	BufferedOutputSream
字符流
InputStreamReader	BufferedReader
OutputStreamWrite	BufferedWriter
便捷字符流
FileReader	BufferedReader
FileWriter	BufferedWriter