How could I post a Map to my restful api by camel?

[sleeper]

I have a web app,which provides some restful api,some of them have been
marked as @POST.

In my camel router,I wanna post a Map params to the restful api,how could I
do it?

Exchange res = template.request("direct:///start", new Processor() {
        public void process(Exchange exchange) throws Exception {
                exchange.getIn().setHeader("to", targetApp);//targetApp is my 
restful api
uri
                exchange.getOut().setBody(params);//params is a java.util.Map 
type
        }
});

here is the problem
1)when I set the map type into the body,My rest can not get the request.
2)when I turn the map into a String type,My rest get the request,but where
is my params data gone??



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