javaforeach获取当前循环次数 java循环读取byte数组

直接上代码

/**
* 以字节为单位读取文件，常用于读二进制文件，如图片、声音、影像等文件。
*/
public static byte[] readFileByBytes(String fileName) {
InputStream in = null;
ByteArrayOutputStream out = new ByteArrayOutputStream();
try {
in = new FileInputStream(fileName);
byte[] buf = new byte[1024];
int length = 0;
while ((length = in.read(buf)) != -1) {
out.write(buf, 0, length);
}
} catch (Exception e1) {
e1.printStackTrace();
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e1) {
}
}
}
return out.toByteArray();
}