MIME ****. Generating tmp file in Jersey Restful API

I have created a RESTfule webservice using Jersey2.0 API that can create and use json MediaType.

@Path( "/PortfolioSummary" )

public class RESTWSService    
{

    public RESTWSService()
    {

    }

    @POST
    @Consumes( { MediaType.APPLICATION_JSON } )
    @Produces( { MediaType.APPLICATION_JSON } )
    public String getportfolioSummary( String req )
    {
         ----
    }
}

      

        
        
        
      

    

When I deploy a service or call a service, a temporary file such as MIME43756487865.tmp is created in my folder AppData/local/Temp

.

How to avoid creating a MIME ****. tmp in the folder /Temp

?