code: private HttpResponse sendForResponse() {
  		return HttpRequest.post(this.url)//
  		.setFollowRedirects(true)//
  		.contentType(getXmlContentType())//
  		.body(getMsgStr(false))//
  		.executeAsync();
  	}
docs: 发送请求，获取异步响应
  
  @return 响应对象