how to send json object from REST client using javax.ws.rs.client.WebTarget

java, jax-rs, jersey-2.0, jersey-client, rest

Solution

There are two different Jersey major versions, 1.x and 2.x, You seems to be trying to use a combination of both, which won't work. The 2.x versions don't have some classes as in 1.x and vice versa.

If you want to use Jersey 2.x, then you should be using `Response`, rather than `ClientResponse`

Response response = target.request().put(Entity.json(friend));
                                        // .json == automatic 'application/json'

- See Working with the Client API for 2.x

- Also as mentioned in your previous post, the getters and setters should be public for the `Friend` class

- Also see the `WebTarget` API

Basic breakdown.

Calling `request()` on `WebTarget` returns an `Invocation.Buidler`

Invocation.Builder builder = target.request();

Once we call `put`, we get back a `Response`

Response response = builder.put(Entity.json(friend));

To extract a known type from the response, we could use `readEntity(Class type)`

String responseString = response.readEntity(String.class);
response.close();

Problem

I have a POJO given below which I want to PUT to the server as JSON or XML. This is what I have done CLIENT: ``` ClientConfig config = new ClientConfig(); Client client = ClientBuilder.newClient(config); WebTarget target = client.target(getBaseURI()); public void putFriend(String uri , Friend friend) { System.out.println(friend.toString()); target = target.path(some_path).path(uri); ClientResponse response = target.request(MediaType.APPLICATION_JSON).put(Entity.entity(friend,MediaType.APPLICATION_JSON),ClientResponse.class); } ``` Examples I found on web were using WebResource. I don't know how to do using WebTarget. What I have done is taken from some example found on SO but Entity.entity() gives error undefined method entity(friend, String). POJO ``` @XmlRootElement public class Friend{ private String friendURI; private String event; private String uri; String getUri() { return uri; } void setUri(String uri) { this.uri = uri; } String getFriendURI() { return friendURI; } void setFriendURI(String friendURI) { this.friendURI = friendURI; } String getEvent() { return event; } void setEvent(String event) { this.event = event; } public String toString() { return "Friend [friendURI=" + friendURI + ", uri=" + uri + ", event=" + event + "]"; } ``` Please guide how to do this. Thanks

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