文件读写链接流向

1)字节流 读写的链接流向
源节点->FileInputStream->BufferedInputStream->ObjectInputStream->程序

程序->ObjectOutputStream->BufferedOutputStream->FileOutputStream->目标节点

2)字符流 读写的链接流向
源节点->FileReader->BufferedReader->程序

程序->BufferedWriter->FileWriter->目标节点