处理multiparam文件上传问题，怎么解决

处理multiparam文件上传问题，怎么解决

I want to upload a JPG file and a JSON-serialized Java object. On the server I am using Apache CXF, on the client I am integration testing with rest-assured.
My server code looks like:
@POST
@Path("/document")
@Consumes(MediaType.MULTIPART_FORM_DATA)
public Response storeTravelDocument(
@Context UriInfo uriInfo,
@Multipart(value = "document") JsonBean bean,
@Multipart(value = "image") InputStream pictureStream)
throws IOException
{}

My client code looks like:
given().
multiPart("document", new File("./data/json.txt"), "application/json").
multiPart("image", new File("./data/image.txt"), "image/jpeg").
expect().
statusCode(Response.Status.CREATED.getStatusCode()).
when().
post("/document");

Everything works fine when I read the json part from the file as in the first multiPart line. However, when I want to serialize the json instance I come into problems. I tried many variants, but none worked.
I thought this variant should work: on the client
JsonBean json = new JsonBean();
json.setVal1("Value 1");
json.setVal2("Value 2");

given().
contentType("application/json").
formParam("document", json).
multiPart("image", new File("./data/image.txt"), "image/jpeg").
...

and on the server
public Response storeTravelDocument(
@Context UriInfo uriInfo,
@FormParam(value = "document") JsonBean bean,
@Multipart(value = "image") InputStream pictureStream)

but no. Can anyone tell me how it should be?

2016年03月06日43分24秒

Try different approach (worked for me), I am not sure if this is suitable in your case.
Make JsonBean a JAXB entity, that it add @XmlRootEntity above class definition.
Then, instead of formParam
given().
contentType("application/json").
body(bean). //bean is your JsonBean
multiPart("image", new File("./data/image.txt"), "image/jpeg").

then
public Response storeTravelDocument(
@Context UriInfo uriInfo,
JsonBean bean, //should be deserialized properly
@Multipart(value = "image") InputStream pictureStream)

I've never tried that with @Multipart part, but, hopefully it would work.

2016年03月06日43分24秒

Multipart/form-data follows the rules of multipart MIME data streams, see w3.org. This means that each part of the request forms a part in the stream. Rest-assured supports already simple fields (strings), files and streams, but not object serialization into a part. After asking on the mailing list, Johan Haleby (the author of rest-assured) suggested to add an issue. The issue is already accepted, see issue 166.
The server will stay as it is:
@POST
@Path("/document")
@Consumes(MediaType.MULTIPART_FORM_DATA)
public Response storeTravelDocument(
@Context UriInfo uriInfo,
@Multipart(value = "document") JsonBean bean,
@Multipart(value = "image") InputStream pictureStream)
throws IOException
{}

The client code will look like:
given().
multiPartObject("document", objectToSerialize, "application/json").
multiPart("image", new File("./data/image.txt"), "image/jpeg").
expect().
statusCode(Response.Status.CREATED.getStatusCode()).
when().
post("/document");

Maybe the name "multiPartObject" will change. We will see once it is implemented.

2016年03月06日43分24秒