RestTemplate 超級嚴重BUG之 restTemplate.getForEntity對於下載文件的地址請求 header不起作用

錯誤下載：
RestTemplate restTemplate=new RestTemplate();
HttpHeaders httpHeaders=new HttpHeaders();
httpHeaders.set(HttpHeaders.RANGE,"bytes=" + 0 + "-" + 10);
org.springframework.http.HttpEntity<byte[]> httpEntity=new org.springframework.http.HttpEntity<>(httpHeaders);
ResponseEntity<byte[]> resp = restTemplate.getForEntity("http://b-ssl.duitang.com/uploads/item/201804/29/20180429134705_yk5mz.jpeg", byte[].class,httpEntity);
System.out.println(Thread.currentThread().getName()+":"+resp.getBody().length);
資源總共：1078729byte 希望下載11byte 結果下載結果為1078729byte  結論：header設置沒有起作用

正確下載：

RestTemplate restTemplate=new RestTemplate();
HttpHeaders httpHeaders=new HttpHeaders();
httpHeaders.set(HttpHeaders.RANGE,"bytes=" + 0 + "-" + 10);
org.springframework.http.HttpEntity<byte[]> httpEntity=new org.springframework.http.HttpEntity<>(httpHeaders);
ResponseEntity<byte[]> rsp = restTemplate.exchange("http://b-ssl.duitang.com/uploads/item/201804/29/20180429134705_yk5mz.jpeg", HttpMethod.GET, httpEntity, byte[].class);
System.out.println(Thread.currentThread().getName()+":"+rsp.getBody().length);

橙色為唯一不同代碼：把getForEntity 換為了exchage 下載結果正確