Method copy

lib/java/src/main/java/com/dianping/cat/util/Files.java:143–145

(InputStream is, OutputStream os)

        INSTANCE;

        public void copy(InputStream is, OutputStream os) throws IOException {
            copy(is, os, AutoClose.NONE);
        }

        public void copy(InputStream is, OutputStream os, AutoClose stream) throws IOException {
            byte[] content = new byte[4096];