code: public static PappayapplyResult payPappayapply(Pappayapply pappayapply,String key){
  		Map<String,String> map = MapUtil.objectToMap( pappayapply);
  		String sign = SignatureUtil.generateSign(map,pappayapply.getSign_type(),key);
  		pappayapply.setSign(sign);
  		String secapiPayRefundXML = XMLConverUtil.convertToXML( pappayapply);
  		HttpUriRequest httpUriRequest = RequestBuilder.post()
  				.setHeader(xmlHeader)
  				.setUri(baseURI()+ "/pay/pappayapply")
  				.setEntity(new StringEntity(secapiPayRefundXML,Charset.forName("utf-8")))
  				.build();
  		return LocalHttpClient.executeXmlResult(httpUriRequest,PappayapplyResult.class,pappayapply.getSign_type(),key);
  	}
docs: 委托代扣-扣款
  @param pappayapply pappayapply
  @param key key
  @return PappayapplyResult