How to Resolve 'No ModelValidationException Found' Errors in Jersey File Uploads?

MULTIPART_FORM_DATA: No ModelValidationException Found for a Parameter in UploadFileService

In Jersey-based RESTful service implementations for file uploads, you might encounter the error: "Validation of the application resource model has failed during application initialization. [[FATAL] No injection source found for a parameter of type public javax.ws.rs.core.Response."

To resolve this issue, you need to ensure that the correct JAR files are included in your project. Specifically:

• Remove jersey-multipart-1.18.jar. It's for Jersey 1.x.
• Add jersey-media-multipart-2.17 and mimepull-1.9.3.

For Maven, include the following dependency:

<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
    <artifactId>jersey-media-multipart</artifactId>
    <version>2.17</version>
</dependency>

Next, register the MultiPartFeature. If using ResourceConfig, register it as follows:

register(MultiPartFeature.class);

If using web.xml, add the class as an init-param to the Jersey servlet:

<init-param>
    <param-name>jersey.config.server.provider.classnames</param-name>
    <param-value>org.glassfish.jersey.media.multipart.MultiPartFeature</param-value>
</init-param>

After resolving the JAR dependency issue, you may also encounter compile errors due to package changes in the imported classes. Ensure that the imported classes use the following packages:

• org.glassfish.jersey.media.multipart.FormDataParam
• org.glassfish.jersey.media.multipart.FormDataContentDisposition

By following these steps, you can resolve the MULTIPART_FORM_DATA error and successfully implement file uploads in your RESTful service using Jersey.

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