java读取本地png图片到byte数组？

Question

File file = new File(path);
FileInputStream fis = new FileInputStream(file);
byte[] img_content = new byte[(int) file.length()];
fis.read(img_content);
fis.close();

图片是存在的
读入的内容全是0 是什么情况？？？

Answer 1

File corruption has nothing to do with the code. . . .