无法在泽西岛实现简单的文件上传-“用资源的 POST 注释，类不被识别为有效的资源方法.不可用"

Cannot implement simple file upload in Jersey - quot;annotated with POST of resource, class is not recognized as valid resource method. unavailablequot;(无法在泽西岛实现简单的文件上传-“用资源的 POST 注释，类不被识别为有效的资源方法.不可用) - IT屋-程序员软件开发技术分享社

问题描述

无法使用 Jersey 实现简单的文件上传.应用程序引导时引发的缺少依赖项错误:

Unable to implement simple file upload using Jersey. Missing dependency errors raised at application bootstrap:

The following errors and warnings have been detected with resource and/or provider classes:
  SEVERE: Missing dependency for method public javax.ws.rs.core.Response com.foo.MyResource.uploadFile(java.io.InputStream,com.sun.jersey.core.header.FormDataContentDisposition) at parameter at index 0
  SEVERE: Missing dependency for method public javax.ws.rs.core.Response com.foo.MyResource.uploadFile(java.io.InputStream,com.sun.jersey.core.header.FormDataContentDisposition) at parameter at index 1
  SEVERE: Method, public javax.ws.rs.core.Response com.foo.uploadFile(java.io.InputStream,com.sun.jersey.core.header.FormDataContentDisposition), annotated with POST of resource, class com.foo.FS2Resource, is not recognized as valid resource method.
unavailable
com.sun.jersey.spi.inject.Errors$ErrorMessagesException
    at com.sun.jersey.spi.inject.Errors.processErrorMessages(Errors.java:170)

将输入参数映射到 REST 服务似乎存在问题?我已阅读文档并遵循了几个示例，我并没有偏离这些示例.

It seems like there is an issue with mapping the input parameters to a REST service? I have read documentation and followed several examples, and I am not deviating from those examples.

代码如下:

@Path("v1/")
public class FileUploadResource {


    @POST
    @Path("upload")
    @Consumes(MediaType.MULTIPART_FORM_DATA)
    @Produces({MediaType.APPLICATION_JSON})
    public Response uploadFile(
        @FormDataParam("file") InputStream is,
        @FormDataParam("file") FormDataContentDisposition detail) {

        String name = detail.getFileName();

        // do upload stuff
        String output = .... 

        return Response.status(200).entity(output).build();
    }

}

我为 FormDataParams 引入了compile 'com.sun.jersey.contribs:jersey-multipart:1.17.1'".

I pulled in "compile 'com.sun.jersey.contribs:jersey-multipart:1.17.1'" for the FormDataParams.

编辑:我能够让它在泽西岛工作，但只能以这种更原始的方式:

EDIT: I was able to get it working in Jersey but only in this more primitive fashion:

 @POST
 @Path("upload")
 @Consumes(MediaType.MULTIPART_FORM_DATA)     
 @Produces(MediaType.TEXT_PLAIN)

 public Response uploadFile(final MimeMultipart file) {
   if (file == null) {
     return Response.status(Response.Status.BAD_REQUEST).entity("Must supply a valid file").build();

   try {
     for (int i = 0; i < file.getCount(); i++) {
       // ... do something with file.getBodyPart(i));
     }
     return Response.ok("done").build();
   } catch (final Exception e) {
     return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(e).build();
   }
 }

这可能是一个足够的解决方法，但仍想深入了解问题的根源.

This is probably a sufficient workaround, but would still like to get to the bottom of the issue.

推荐答案

我也遇到了同样的问题.

I had the same problem.

这是一个版本问题(我在 jersey.multipart 中使用 1.8，在其余球衣中使用 1.17.1).将它们全部设置为 1.17.1 workrd for mee.

It was a version problem (I'd 1.8 in jersey.multipart and 1.17.1 in the rest of jersey). Setting all of them to 1.17.1 workrd for mee.

从这里得到我的答案:

方法时缺少依赖项做一个文件上传休息网络服务

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