my code is as follows

        //set factory
        HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory();
        factory.setConnectTimeout(500);
        factory.setReadTimeout(3000);

        //set headers
        RestTemplate template = new RestTemplate(factory);
        HttpHeaders httpHeaders = new HttpHeaders();
        httpHeaders.setContentType(MediaType.APPLICATION_JSON_UTF8);
        httpHeaders.set("Accept", "*/*");
        httpHeaders.set("Accept-Charset", "utf-8");    

,
this is the header information of the request. What I can"t understand is * * Why I overwrite Accept and Accept-Charset, but still write Accept-Charset in resttemplate, hoping someone can help me.