Convert Stream to String Java/Groovy

I stole this snippet off the web. But it looks to be limited to 4096 bytes and is quite ugly IMO. Anyone know of a better approach? I'm actually using Groovy btw...

String streamToString(InputStream input) {
        StringBuffer out = new StringBuffer();
        byte[] b = new byte[4096];
        for (int n; (n = input.read(b)) != -1;) {
            out.append(new String(b, 0, n));
        }
        return out.toString();
    }

EDIT:

I found a better solution in Groovy:

InputStream exportTemplateStream = getClass().getClassLoader().getResourceAsStream("export.template")
assert exportTemplateStream: "[export.template stream] resource not found"
String exportTemplate = exportTemplateStream.text