java - 从 Jersey Client 1.x 升级到 Jersey Client 2.x

Question

我正在使用 jersey-client-1.9 .示例代码:

import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.WebResource;

Client client = Client.create();
webResource = client.resource("http://localhost:8047/storage/hive.json");
String input = //rest request
ClientResponse response = webResource.type("application/json").post(ClientResponse.class, input);
String queryRespose = response.getEntity(String.class);

由于该项目已从 com.sun.jersey.api.client 更改至 org.glassfish.jersey.client .如何在 jersey-client-2.8 中实现这一点?

编辑:

import javax.ws.rs.client.Client;
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.client.Entity;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.core.Response;

Client client = ClientBuilder.newClient();
WebTarget target = client.target("http://localhost:8047/query.json");
String input =//rest request
Response response = target.request().post(Entity.json(input));
String queryRespose = response.readEntity(String.class);

这有效... :)

Answer 1

使用 Jersey 2.x，您可以构建 Client与 ClientBuilder

Client client = ClientBuilder.newClient();

在 Jersey 2.x WebTarget类似于 Jersey 1.x WebResource , 而不是调用 client.resource()获取 WebResource ，您调用 client.target()获取 WebTarget

WebTarget target = client.target(url); 

那你需要调用 request()在 WebTarget获取 Invocation.Builder ，这将允许您链接其他调用

Invocation.Builder invocation = target.request();

要发送实体，我们需要传递 Entity 到 Invocation.Builder 之一的请求方法。例如

Response response = builder.post(Entity.json(input);

要阅读响应，请使用 response.readEntity(String.class) .所以总的来说，你可以做

Client client = ClientBuilder.newClient();
WebTarget target = client.target(url);
Response response = target.request().post(Entity.json(input));
String entity = response.readEntity(String.class);

另见:

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

Client API documentation

更新
您可能还需要以下依赖项来支持 JSON/POJO

<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
    <artifactId>jersey-media-json-jackson</artifactId>
    <version>${jersey.version}</version>
</dependency>

然后注册 JacksonFeature与客户。就是这样 input (如果你想使用 POJO 而不是 String)可以序列化为 JSON

client.register(JacksonFeature.class);