RestTemplate 超级严重BUG之 restTemplate.getForEntity对于下载文件的地址请求 header不起作用

错误下载：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);资源总共：1078729byte 希望下载11byte 结果下载结果为1078729byte  结论：header设置没有起作用

正确下载：

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);

橙色为唯一不同代码：把getForEntity 换为了exchage 下载结果正确

原文地址：https://www.cnblogs.com/coderdxj/p/11629802.html