Java IO相互转换

byte[]和InputStream的相互转换

byte[]转换为InputStream

public static final InputStream bytes2InStream(byte[] buf) {
    return new ByteArrayInputStream(buf);
}

InputStream转换为byte[]

public static final byte[] inStream2bytes(InputStream inStream) throws IOException {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    byte[] buff = new byte[1024];
    int len = 0;
    while ((len = inStream.read(buff)) > 0) {
        baos.write(buff, 0, len);
    }
    byte[] bytes = baos.toByteArray();
    return bytes;
}