java http接口 加签，验签

		Random random = new Random(); 
		int rannum = (int) (random.nextDouble() * (99999 - 10000 + 1)) + 10000;//5位随即数
		String nonce = rannum + "";
		String signature = HMACSHA1Util.getHmacSHA1(createtime+nonce, appKey);//appKey =公共密钥
        String smsUrl="https://"+sjyUrl+":"+sjyPort+"}/rest/sendMessage?appid="+appId+"&timestamp="+createtime+"&nonce="+nonce+"&signature="+signature;  
		
		
		
		Random random = new Random(); 
		in