Java 如何使用 RestTemplate 调用 MultipartFile Spring REST URL
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How to call MultipartFile Spring REST URL with RestTemplate
提问by Channa
When I try to call following MultipartFile Spring REST url with my Spring Template base Test method, I got following exception. How can I make this correct. Thanks.
当我尝试使用我的 Spring 模板基础测试方法调用以下 MultipartFile Spring REST url 时，出现以下异常。我怎样才能做到这一点。谢谢。
Spring REST URL:
春季 REST 网址：
@RequestMapping(value = "/media/uploadMultipartFile/{token}/{title}/{trailId}/{wpId}", method = RequestMethod.POST)
public @ResponseBody MediaHttp uploadMultipartFile(@RequestParam MultipartFile file,
@PathVariable String token,
@PathVariable String title,
@PathVariable String trailId,
@PathVariable String wpId,
HttpServletResponse response)
Test method:
测试方法：
try {
// Message Converters
List<HttpMessageConverter<?>> messageConverters = new ArrayList<HttpMessageConverter<?>>();
messageConverters.add(new FormHttpMessageConverter());
messageConverters.add(new SourceHttpMessageConverter<Source>());
messageConverters.add(new StringHttpMessageConverter());
messageConverters.add(new MappingHymansonHttpMessageConverter());
// RestTemplate
RestTemplate template = new RestTemplate();
template.setMessageConverters(messageConverters);
// URL Parameters
MultiValueMap<String, Object> parts = new LinkedMultiValueMap<String, Object>();
parts.add("token", "nkc2jvbrbc");
parts.add("title", "test mp4 file");
parts.add("trailId", "2");
parts.add("wpId", "7");
parts.add("file", new FileSystemResource("C:\Users\Public\Pictures\Sample Pictures\test.mp4"));
// Post
MediaHttp result = template.postForObject(Constants.APPLICATION_URL + "/media/uploadMultipartFile/{token}/{title}/{trailId}/{wpId}", parts, MediaHttp.class);
} catch (Exception e) {
System.out.println("Error: " + e.getMessage());
}
Exception:
例外：
Invalid amount of variables values in [http://test.com:8080/DMW-skeleton-1.0/media/uploadMultipartFile/{token}/{title}/{trailId}/{wpId}]: expected 4; got 0
[ http://test.com:8080/DMW-skeleton-1.0/media/uploadMultipartFile/{token}/{title}/{trailId}/{wpId}] 中的变量值数量无效：预期为 4；得到 0
采纳答案by M. Deinum
The message is pretty clear, you don't specify any path parameters for submission. You only provide a map which will be send as the body of the request.
该消息非常清楚，您没有指定任何用于提交的路径参数。您只需提供一张地图，该地图将作为请求正文发送。
change your call to include those parameters as the last part of the method call.
更改您的调用以将这些参数包含在方法调用的最后一部分。
// URL Parameters
MultiValueMap<String, Object> parts = new LinkedMultiValueMap<String, Object>();
parts.add("file", new FileSystemResource("C:\Users\Public\Pictures\Sample Pictures\test.mp4"));
// Post
MediaHttp result = template.postForObject(Constants.APPLICATION_URL + "/media/uploadMultipartFile/{token}/{title}/{trailId}/{wpId}", parts, MediaHttp.class, "nkc2jvbrbc", "test mp4 file", "2", "7);
