问如何将Java字符串转换为byte []？

System.out.println(response.split("\r\n\r\n")[1]);

System.out.println("******");

System.out.println(response.split("\r\n\r\n")[1].getBytes().toString());

String decompressGZIP(byte[] gzip) throws IOException {

    java.util.zip.Inflater inf = new java.util.zip.Inflater();

    java.io.ByteArrayInputStream bytein = new java.io.ByteArrayInputStream(gzip);

    java.util.zip.GZIPInputStream gzin = new java.util.zip.GZIPInputStream(bytein);

    java.io.ByteArrayOutputStream byteout = new java.io.ByteArrayOutputStream();

    int res = 0;

    byte buf[] = new byte[1024];

    while (res >= 0) {

        res = gzin.read(buf, 0, buf.length);

        if (res > 0) {

            byteout.write(buf, 0, res);

        }

    }

    byte uncompressed[] = byteout.toByteArray();

    return (uncompressed.toString());

}