Question

有以下代码：

public static void uploadUserpick(File file) throws URISyntaxException, ClientProtocolException, IOException {  
    HttpClient httpclient = new DefaultHttpClient();
    HttpPost httppost = new HttpPost(USERPICK_URL);
    MultipartEntity entity = new MultipartEntity();
    entity.addPart("upload", new FileBody(file));
    httppost.setEntity(entity);
    HttpResponse response = httpclient.execute(httppost); 
}

存在以下问题 - 后端代码限制POST请求的MIME类型，因此我需要设置我的图像文件的MIME类型（文件文件）。我怎么设置它？

Answer 1

您应该根据图片的格式向"Content-Type"添加HttpPost标头。例如，如果您的file是 GIF 图片，那么您应该按以下方式添加标题：

httppost.addHeader(new BasicHeader ("Content-Type", "image/gif"));

希望它有所帮助。

修改

正如另一个答案中所提到的，addHeader方法实际上比我原先提到的方法更容易过载。

httppost.addHeader("Content-Type", "image/gif");

Answer 2

I found out how to do this here.就这样做：

httppost.addHeader("Content-Type", "application/xml");

Answer 3

您可以替换

new FileBody(file)

通过

new FileBody(file, "image/jpeg");

See related question和blog post。

Answer 4

如果是春天你可以使用MediaType类

这样做

@RequestMapping(value = { "/xml/private/secure/store.html"}, 
        method = RequestMethod.POST,
        produces = MediaType.APPLICATION_XML_VALUE) 
@ResponseStatus(value = HttpStatus.OK)
@ResponseBody 
public StoreDTO returnStoreXML(Model model, 
        @RequestParam(value = "id", required = false) String id,
        @RequestParam(value = "name", required = false) String name) {

}

如何将MIME类型添加到POST请求Java？

4 个答案: