Cannot get out messsage in Apache camel after using template.send()

Question

There is a task that need to send parameters to third-part URL and get response from this URL . This Url using json header and the code is below:

public void processHandler(Exchange exchange) throws Exception {

        logger.info("1111111");
        ProducerTemplate template =exchange.getContext().createProducerTemplate();
        template.getCamelContext().getGlobalOptions().put("http.proxyHost", "proxy.dst.com");
        template.getCamelContext().getGlobalOptions().put("http.proxyPort", "8080");                            
        
        Exchange exchange1  =template.send("http://uat.alphoa.dst.com/alphoa/app/ws/getCellpost",new Processor() {
              public void process(Exchange exchange2) throws Exception {
                    exchange2.getIn().setHeader(Exchange.HTTP_QUERY, "{\"fsa\":\"60124285\"}");
                    exchange2.getIn().setHeader(Exchange.HTTP_METHOD, "POST");
                    exchange2.getIn().setHeader(Exchange.CONTENT_TYPE,"application/json");
                    exchange2.getIn().setHeader(Exchange.CONTENT_ENCODING,"utf-8");
                    exchange2.getIn().setBody(exchange.getIn().getBody());
                                        
                    logger.info("out body:"+exchange.getOut().getBody());
                  }
            });
        
    logger.info("object:"+exchange1.getOut().getBody());
    }

but, there is no out message

12:15:41.170 \[qtp752576078-53\] INFO com.alphoa.processor.TestProcessor - out body:null 12:15:41.171 \[qtp752576078-53\] INFO com.alphoa.processor.TestProcessor - object:null

And when I debug it, I found a message on it:

No body available of type: java.io.InputStream but has value:
  FreeMthlyGiftAlertMsgIMSCriteria [fsa=111111] of type:
  com.alphoa.api.criteria.FreeMthlyGiftAlertMsgIMSCriteria on: Message[].
Caused by: No type converter available to convert from type: 
  com.alphoa.api.criteria.FreeMthlyGiftAlertMsgIMSCriteria to the required type: 
  java.io.InputStream with value FreeMthlyGiftAlertMsgIMSCriteria [fsa=111111]. 
  Exchange[ID-PCCWSCHN14D0006-1648528340913-4-4]. 
Caused by: [org.apache.camel.NoTypeConversionAvailableException - No type 
  converter available to convert from type: 
  com.alphoa.api.criteria.FreeMthlyGiftAlertMsgIMSCriteria to the required type: 
  java.io.InputStream with value FreeMthlyGiftAlertMsgIMSCriteria [fsa=111111]]