Spring 4.1.0 RestTemplate POST call

I am trying to make a rest call using spring 4.1.0 RestTemplate but i dont see HttpEntity class.

     HttpHeaders requestHeaders=new HttpHeaders();
     requestHeaders.set("Content-Type", "application/json");
     String str = new String();
        HttpEntity<String> requestEntity=new HttpEntity<String>(str,requestHeaders);
        RestTemplate restTemplate=new RestTemplate();
        URI location = restTemplate.postForLocation("http://example.com", entity);

So there are 2 questions:

1. How can i get access to HttpEntity class as its not found?


2. how can i get the body or the response from URI?

Kindly suggest