如何使用 javax.ws.rs.client.WebTarget 从 REST 客户端发送 json 对象

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

提问by user3275095

I have a POJO given below which I want to PUT to the server as JSON or XML.

我有一个下面给出的 POJO，我想将其作为 JSON 或 XML 放到服务器上。

This is what I have done

这就是我所做的

CLIENT:

客户：

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.

我在网上找到的例子是使用 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).

我不知道如何使用 WebTarget。我所做的是取自在 SO 上找到的一些示例，但 Entity.entity() 给出了错误未定义的方法实体（朋友，字符串）。

POJO

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.

请指导如何做到这一点。

Thanks

谢谢

采纳答案by Paul Samsotha

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.

有两个不同的 Jersey 主要版本，1.x 和 2.x，您似乎正在尝试使用两者的组合，但这是行不通的。2.x 版本没有 1.x 中的某些类，反之亦然。

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

如果你想使用 Jersey 2.x，那么你应该使用Response, 而不是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 Friendclass
• Also see the WebTargetAPI

• 请参阅使用 2.x 的客户端 API
• 同样如您在上一篇文章中提到的，getter 和 setter 应该对Friend类公开
• 另请参阅WebTargetAPI

Basic breakdown.

基本分解。

• Calling request()on WebTargetreturns 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();
  

• 调用request()的WebTarget返回一个Invocation.Buidler

  Invocation.Builder builder = target.request();
  

• 一旦我们打电话put，我们就会得到一个Response

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

• 要从响应中提取已知类型，我们可以使用 readEntity(Class type)

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