我正在尝试进行概念验证,其中涉及 .Net 系统将文件发布到 Java Spring Boot 应用程序上的 Rest 端点。我不断收到“所需参数不存在”错误。这个错误有很多 SO 问题,我已经尝试了那些没有运气的解决方案。谁能看出我做错了什么?
这是我的 C# 代码:
private async Task<string> PostFileAsync(string uri, System.IO.FileStream fileStream)
{
using (var client = _httpClientFactory())
{
using (var content = new MultipartFormDataContent())
{
content.Add(new StreamContent(fileStream), "assetFile");
using (var message = await client.PostAsync(uri, content))
{
return await message.Content.ReadAsStringAsync();
}
}
}
}
这是 Fiddler 看到的请求:
POST http://10.0.2.2:8083/asset/1000/1001 HTTP/1.1
Content-Type: multipart/form-data; boundary="bac9aebd-d9ff-40ef-bcf3-4fffdd1b2c00"
Host: 10.0.2.2:8083
Content-Length: 158
Expect: 100-continue
Connection: Keep-Alive
--bac9aebd-d9ff-40ef-bcf3-4fffdd1b2c00
Content-Disposition: form-data; name=assetFile
foo,bar,10
foo2,bar2,12
--bac9aebd-d9ff-40ef-bcf3-4fffdd1b2c00--
这是我的 Controller :
@RestController
@RequestMapping("/asset/")
public class AssetController {
@RequestMapping(path="{merchantId}/{assetId}", method=RequestMethod.POST)
public String getAsset(
HttpServletRequest request,
@RequestParam("assetFile") MultipartFile file,
@PathVariable("merchantId") long merchantId,
@PathVariable("assetId") long assetId) throws IOException
{
return "It worked!";
}
}
这是我的配置:
@SpringBootApplication(exclude={MultipartAutoConfiguration.class})
public class MySpringApplication {
public static void main(String[] args) {
SpringApplication.run(MySpringApplication.class, args);
}
@Bean(name = "multipartResolver")
public CommonsMultipartResolver multipartResolver() {
System.out.println("multipartResolver()");
CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver();
return multipartResolver;
}
}
这是回复:
HTTP/1.1 400 Bad Request
Server: Apache-Coyote/1.1
Content-Type: application/json;charset=UTF-8
Transfer-Encoding: chunked
Date: Fri, 25 Mar 2016 19:34:55 GMT
Connection: close
f3
{"timestamp":1458934495566,"status":400,"error":"Bad Request","exception":"org.springframework.web.bind.MissingServletRequestParameterException","message":"Required MultipartFile parameter 'assetFile' is not present","path":"/asset/1000/1001"}
0
已编辑,因为我发布了错误的 C# 代码
最佳答案
好吧,也许我没有尝试过我在 SO 上看到的所有解决方案。
This question had a solution for me.
我必须使用 @ModelAttribute
而不是 @RequestParam
。
关于java - 所需的 MultipartFile 参数不存在 - Spring Boot REST POST,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/36227491/