是的，Apache HttpClient可以支持使用基于OAuth2的Bearer令牌，并提供开箱即用的支持。下面是一个使用Apache HttpClient发送带有Bearer令牌的HTTP请求的示例代码：

import org.apache.http.HttpEntity;
import org.apache.http.HttpHeaders;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

public class HttpClientExample {

    public static void main(String[] args) throws Exception {
        // Bearer令牌
        String bearerToken = "YOUR_BEARER_TOKEN";

        // 创建HttpClient实例
        HttpClient httpClient = HttpClients.createDefault();

        // 创建GET请求对象，并设置请求URL
        HttpGet httpGet = new HttpGet("https://api.example.com/resource");

        // 添加Bearer令牌到请求头
        httpGet.setHeader(HttpHeaders.AUTHORIZATION, "Bearer " + bearerToken);

        // 发送请求，并获取响应
        HttpResponse response = httpClient.execute(httpGet);

        // 解析响应
        HttpEntity entity = response.getEntity();
        String responseBody = EntityUtils.toString(entity);

        // 打印响应
        System.out.println(responseBody);
    }
}

请注意，上述代码中的YOUR_BEARER_TOKEN应替换为实际的Bearer令牌。此代码使用Apache HttpClient创建一个GET请求，并在请求头中添加了Bearer令牌。然后发送请求并获取响应。响应的主体内容将作为字符串打印出来。