杰克逊·李斯特 <E> json序列化

Question

Hi, im creating a jersey 2.0+ rest web service. I was using 1.7 and now im trying to migrate it to 2.0.

I have 2 classes with E objects for handle responses:

public class JsonMessageSingle<E> {

private int status;
private String message;
private E data; // for single objects

}

And one that uses:

private List<E> data; // for list of objects

My responses are all in this format:

@GET
@Produces("application/json")
public JsonMessageList<User> getUser() {
    List<User> list = new UserDao<User>().findAll();

    return new JsonMessageList<User>(list); //constructor create status and message basesd on object passed (if null == "error")
}

Using jersey 1.7 everything was ok on the response, but now i got:

HTTP Status 500 - Internal Server Error

And no exception/error on the console. It cant serialize the List>E<, all other objects are serialized correctly. Can someone help me? Thanks in advance.

Answer 1

Find out it was my mistake. Even if you have jackson as dependences (as sugested by jersey itself) you have to configure jersey.media to use jackson as default parser.

Using maven, update your pom.xml with:

<dependency>
   <groupId>org.glassfish.jersey.media</groupId>
   <artifactId>jersey-media-json-jackson</artifactId>
   <version>2.10.1</version>
</dependency>

instead of:

<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
    <artifactId>jersey-media-moxy</artifactId>
   <version>2.10.1</version>
</dependency>