JSP开发中Apache-HTTPClient 用户验证的实例详解

前言：

在微服务框架之外的系统中，我们经常会遇到使用httpClient进行接口调用的问题，除了进行白名单的设置，很多时候我们需要在接口调用的时候需要身份认证。翻了一下官方文档，解决方法很多，但是都不太符合实际业务场景，这里提供一种简单粗暴的解决方法。

解决方法：利用请求头，将验证信息保存起来。

实现代码：

public class HttpClientUtils { protected static final Logger LOG = LoggerFactory.getLogger(HttpClientUtils.class); private static final String AUTHENKEY = "Authorization"; private static final String BASICKEY = "Basic "; public static String getConnect(String url,String username,String password) { CloseableHttpResponse response = null; CloseableHttpClient client = HttpClients.createDefault(); HttpGet httpGet = new HttpGet(url); Base64 token = new Base64(); String authenticationEncoding = token.encodeAsString(new String(username + ":" + password).getBytes()); httpGet.setHeader(AUTHENKEY, BASICKEY + authenticationEncoding); String responseContent = ""; try { response = client.execute(httpGet); HttpEntity entity = response.getEntity(); responseContent = EntityUtils.toString(entity, "UTF-8"); } catch (IOException e) { LOG.error(e.toString()); } finally { if (response != null) { try { response.close(); } catch (IOException e) { LOG.error(e.toString()); } } if (client != null) { try { client.close(); } catch (IOException e) { LOG.error(e.toString()); } } } return responseContent; }}

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