用FileInputStream读文件,字节数组接收,不知道文件的大小时怎么办
FileInputStream in = new FileInputStream(文件路径File);
byte[] buffer = new byte[in.available()];
in.read(buffer);
in.available()返回的是数组字节长度int;
FileInputStream in = new FileInputStream(文件路径File);
byte[] buffer = new byte[in.available()];
in.read(buffer);
in.available()返回的是数组字节长度int;