我正在尝试使用代理框架构建一个简单的resteasy客户机。我得到一个错误，“无法示例化resteasyclientbuilder类型”。这是客户机类。

package com.RestClient.Clients;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.UriBuilder;
import org.jboss.resteasy.client.jaxrs.ResteasyClient;
import org.jboss.resteasy.client.jaxrs.ResteasyClientBuilder;
import org.jboss.resteasy.client.jaxrs.ResteasyWebTarget;

import com.RestClient.Models.Student;

public class ClientClass {
    ResteasyClient client;
    ResteasyWebTarget base_target,student_target;
    ClientInterface proxy;
    public ClientClass() {
        client = new ResteasyClientBuilder().build();<---------error
        base_target = client.target(UriBuilder.fromPath("http://localhost:8080/demorest/webresources/"));
        student_target = base_target.path("students");
    }
    public int registerStudent(Student s) {
        Response res = proxy.createStudent(s);
        return res.getStatus();

    }
}

我在学习这个教程。