How to Upload Files with Additional JSON Data in a Jersey RESTful Web Service?

File Upload with Additional Data in Jersey RESTful Web Service

To achieve file upload along with other object data in a single REST call, modify the uploadFileWithData method as follows:

@POST
@Path("/upload2")
@Consumes({MediaType.MULTIPART_FORM_DATA, MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON})
public Response uploadFileWithData(
        @FormDataParam("file") InputStream fileInputStream,
        @FormDataParam("file") FormDataContentDisposition contentDispositionHeader,
        @FormDataParam("emp") String employeeJson) {

    // Deserialize the employee data from JSON
    JacksonJsonProvider provider = new JacksonJsonProvider();
    Employee emp = provider.readFrom(Employee.class, employeeJson);

    // ...business logic...
}

Key Points:

• Instead of using an Employee object, receive the employee data as a raw JSON string (String employeeJson).
• Use Jackson's JacksonJsonProvider to deserialize the JSON string into the Employee object.
• Ensure that the provider is registered in your JAX-RS application.

Postman Troubleshooting:

Postman may not automatically set Content-Types for individual body parts. To fix this:

1. Open the request body in the Postman editor.
2. Right-click on the "emp" part and select "Edit" or "Add Header".
3. Set the Content-Type to application/json.

Alternative Solution:

Alternatively, you can set the Content-Type explicitly in your REST method:

@POST
@Path("/upload2")
@Consumes(MediaType.MULTIPART_FORM_DATA)
public Response uploadFileAndJSON(
        @FormDataParam("emp") FormDataBodyPart jsonPart,
        @FormDataParam("file") FormDataBodyPart bodyPart) {

    jsonPart.setMediaType(MediaType.APPLICATION_JSON_TYPE);
    Employee emp = jsonPart.getValueAs(Employee.class);

    // ...business logic...
}

Note:

If you are using a different Connector than HttpUrlConnection, you may encounter issues as discussed in the associated comments.

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