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

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

我在下面给出了一个POJO，我希望将其作为JSON或XML输出到服务器。

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。我所做的是从SO上找到的一些例子中获取，但Entity.entity（）给出了未定义的方法实体（friend，String）。

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.

请指导如何执行此操作。

Thanks

谢谢

1 个解决方案

#1

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.

有两个不同的泽西岛主要版本，1.x和2.x，你似乎试图使用两者的组合，这将无法正常工作。 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
请参阅使用2.x的客户端API
Also as mentioned in your previous post, the getters and setters should be public for the Friend class
同样如您在上一篇文章中所提到的，getter和setter应该是Friend类的公共内容
Also see the WebTarget API
另请参阅WebTarget API

Basic breakdown.

基本故障。

Calling request() on WebTarget returns an Invocation.Buidler

在WebTarget上调用request（）会返回一个Invocation.Buidler
```
Invocation.Builder builder = target.request();
```
Once we call put, we get back a Response

一旦我们调用了put，我们就会回复一个Response
```
Response response = builder.put(Entity.json(friend));
```
To extract a known type from the response, we could use readEntity(Class type)

要从响应中提取已知类型，我们可以使用readEntity（类类型）
```
String responseString = response.readEntity(String.class);
response.close();
```

#1