java httpclient basic授权

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.StatusLine;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.HttpClients;
import javax.xml.bind.DatatypeConverter;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

public class JavaNetURLRESTFulClient {
	public static void main(String[] args) throws ClientProtocolException, IOException {
		// 认证信息对象，用于包含访问翻译服务的用户名和密码

		String path = "http://127.0.0.1:9090/plugins/restapi/v1/sessions";
		// 1.创建客户端访问服务器的httpclient对象 打开浏览器
		HttpClient httpclient = HttpClients.createDefault();
		// 2.以请求的连接地址创建get请求对象 浏览器中输入网址
		HttpGet httpget = new HttpGet(path);

		// username:password--->访问的用户名，密码,并使用base64进行加密，将加密的字节信息转化为string类型，encoding--->token
		String encoding = DatatypeConverter.printBase64Binary("admin:123456".getBytes("UTF-8"));

		httpget.setHeader("Authorization", "Basic " + encoding);
		// 3.向服务器端发送请求 并且获取响应对象 浏览器中输入网址点击回车
		HttpResponse response = httpclient.execute(httpget);
		// 4.获取响应对象中的响应码
		StatusLine statusLine = response.getStatusLine();// 获取请求对象中的响应行对象
		int responseCode = statusLine.getStatusCode();// 从状态行中获取状态码

		System.out.println(responseCode);
		if (HttpStatus.SC_OK == responseCode) {
			// 5. 可以接收和发送消息
			HttpEntity entity = response.getEntity();
			// 6.从消息载体对象中获取操作的读取流对象
			InputStream input = entity.getContent();
			BufferedReader br = new BufferedReader(new InputStreamReader(input));

			String line = null;
			StringBuilder sb = new StringBuilder();
			while ((line = br.readLine()) != null) {
				sb.append(line);
			}
			String result = new String(sb.toString().getBytes("utf-8"), "utf-8");
			System.out.println("服务器的响应是:" + result);
			br.close();
			input.close();
		} else {
			System.out.println("响应失败!");
		}

	}
}

pom依赖

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.5.3</version>
</dependency>
<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpcore</artifactId>
    <version>4.4.6</version>
</dependency>
<dependency>
    <groupId>commons-logging</groupId>
    <artifactId>commons-logging</artifactId>
    <version>1.1.3</version>
</dependency>