java - 如何解决 MessageBodyWriter not found for media type=multipart/form-data 错误

Question

如何为简单的多表单帖子配置提供商。任何建议/指针将不胜感激。

堆栈跟踪:

org.glassfish.jersey.message.internal.MessageBodyProviderNotFoundException: MessageBodyWriter not found for media type=multipart/form-data, type=class org.glassfish.jersey.media.multipart.FormDataMultiPart, genericType=class org.glassfish.jersey.media.multipart.FormDataMultiPart.
    at org.glassfish.jersey.message.internal.WriterInterceptorExecutor$TerminalWriterInterceptor.aroundWriteTo(WriterInterceptorExecutor.java:227)
    at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:149)
    at org.glassfish.jersey.message.internal.MessageBodyFactory.writeTo(MessageBodyFactory.java:1139)
    at org.glassfish.jersey.client.ClientRequest.writeEntity(ClientRequest.java:433)
    at org.glassfish.jersey.test.inmemory.internal.InMemoryConnector.apply(InMemoryConnector.java:214)
    at org.glassfish.jersey.client.ClientRuntime.invoke(ClientRuntime.java:217)
    at org.glassfish.jersey.client.JerseyInvocation$1.call(JerseyInvocation.java:655)

pom.xml 依赖项:

<dependencies>
        <dependency>
            <groupId>org.glassfish.jersey.test-framework.providers</groupId>
            <artifactId>jersey-test-framework-provider-inmemory</artifactId>
            <version>2.4</version>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jersey.media</groupId>
            <artifactId>jersey-media-multipart</artifactId>
            <version>2.4</version>
        </dependency>
        <dependency>
            <groupId>org.hamcrest</groupId>
            <artifactId>hamcrest-all</artifactId>
            <version>1.3</version>
        </dependency>
    </dependencies>

代码:

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.is;

import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.client.Entity;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.core.Application;
import javax.ws.rs.core.Form;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;

import org.glassfish.jersey.media.multipart.FormDataBodyPart;
import org.glassfish.jersey.media.multipart.FormDataMultiPart;
import org.glassfish.jersey.media.multipart.MultiPartFeature;
import org.glassfish.jersey.server.ResourceConfig;
import org.glassfish.jersey.test.JerseyTest;
import org.junit.Test;

public class TestMultiPartTest extends JerseyTest {

    @Override
    protected Application configure() {
        ResourceConfig rc = new ResourceConfig(ServerSideResource.class);
        rc.register(MultiPartFeature.class);
        return rc;
    }

    @Path("test")
    public static class ServerSideResource {

        @POST
        @Path("/multipart")
        @Consumes(MediaType.MULTIPART_FORM_DATA)
        @Produces(MediaType.APPLICATION_JSON)
        public Response file(FormDataMultiPart formParams) {
            System.out.println("found multipart resource");
            return Response.ok().build();
        }

        @POST
        @Path("/encoded")
        @Consumes(MediaType.APPLICATION_FORM_URLENCODED)
        @Produces(MediaType.APPLICATION_JSON)
        public Response file(Form formParams) {
            System.out.println("found encoded resource");
            return Response.ok().build();
        }

    }

    @Test
    public void testPostMultiPartFile() {
        final WebTarget target = target().path("test/multipart");
        final FormDataMultiPart mp = new FormDataMultiPart();
        final FormDataBodyPart p = new FormDataBodyPart("field1", "CONTENT ONE");
        mp.bodyPart(p);
        final FormDataBodyPart p2 = new FormDataBodyPart("field2", "CONTENT TWO");
        mp.bodyPart(p2);

        System.out.println("making multipart request");
        final Response r = target.request().post(Entity.entity(mp, MediaType.MULTIPART_FORM_DATA_TYPE), Response.class);
        System.out.println(r.getStatus());
        assertThat("response is 200", r.getStatus(), is(200));
    }

    @Test
    public void testPostEncodedForm() {
        final WebTarget target = target().path("test/encoded");
        final Form form = new Form();
        form.param("test", "value");
        System.out.println("making encoded request");

        final Response r = target.request().post(Entity.form(form), Response.class);
        System.out.println(r.getStatus());
        assertThat("response is 200", r.getStatus(), is(200));
    }

}

Answer 1

好吧，阅读文档没有帮助，但阅读 Jersey 集成测试源代码有帮助。

在 JerseyTest 实例中，您需要覆盖 configureClient 方法并传入 MultiPartFeature 类。

@Override
protected void configureClient(ClientConfig config) {
    config.register(MultiPartFeature.class);
}

工作代码:

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.is;

import javax.ws.rs.Consumes;
import javax.ws.rs.FormParam;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.client.Entity;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.core.Application;
import javax.ws.rs.core.Form;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;

import org.glassfish.jersey.client.ClientConfig;
import org.glassfish.jersey.media.multipart.FormDataBodyPart;
import org.glassfish.jersey.media.multipart.FormDataMultiPart;
import org.glassfish.jersey.media.multipart.MultiPartFeature;
import org.glassfish.jersey.server.ResourceConfig;
import org.glassfish.jersey.test.JerseyTest;
import org.junit.Test;

public class TestMultiPartTest extends JerseyTest {

    @Override
    protected Application configure() {
        ResourceConfig rc = new ResourceConfig(ServerSideResource.class);
        rc.register(MultiPartFeature.class);
        return rc;
    }

    @Override
    protected void configureClient(ClientConfig config) {
        config.register(MultiPartFeature.class);
    }

    @Path("test")
    public static class ServerSideResource {

        @POST
        @Path("/multipart")
        @Consumes(MediaType.MULTIPART_FORM_DATA)
        // @Produces(MediaType.APPLICATION_JSON)
        public Response file(FormDataMultiPart formParams) {
            System.out.println("found multipart resource");
            return Response.ok().build();
        }

        @POST
        @Path("/encoded")
        @Consumes(MediaType.APPLICATION_FORM_URLENCODED)
        // @Produces(MediaType.APPLICATION_JSON)
        public Response file(@FormParam("field3") String field3) {
            System.out.println("found encoded resource");
            System.out.println("got form.field3 value: " + field3);
            return Response.ok().build();
        }

    }

    @Test
    public void testAnotherWay() {
        WebTarget target = target("test/encoded");
        final Form form = new Form();
        form.param("field3", "field3 value");
        System.out.println("testAnotherWay");
        Response response = target.request().post(Entity.form(form), Response.class);
        System.out.println(response);
    }

    @Test
    public void testPostMultiPartFile() {
        final WebTarget target = target().path("test/multipart");
        final FormDataMultiPart mp = new FormDataMultiPart();
        final FormDataBodyPart p = new FormDataBodyPart("field1", "CONTENT ONE");
        mp.bodyPart(p);
        final FormDataBodyPart p2 = new FormDataBodyPart("field2", "CONTENT TWO");
        mp.bodyPart(p2);

        System.out.println("field1: " + mp.getField("field1").getValue());
        System.out.println("field2: " + mp.getField("field2").getValue());
        System.out.println("making multipart request");
        final Response r = target.request().post(Entity.entity(mp, MediaType.MULTIPART_FORM_DATA), Response.class);
        System.out.println(r);
        assertThat("response is 200", r.getStatus(), is(200));
    }

    @Test
    public void testPostEncodedForm() {
        final WebTarget target = target().path("test/encoded");
        final Form form = new Form();
        form.param("field3", "field3 value");
        System.out.println("making encoded request");

        final Response r = target.request().post(Entity.form(form), Response.class);
        System.out.println(r);
        assertThat("response is 200", r.getStatus(), is(200));
    }

}