HttpClient-HttpClient4.5使用代理服务器访问外网 java

前言：当你处于公司内网无法对外网的接口访问，但是我们有一些第三方的接口处于外网，所以这个时候就需要配置代理服务器发出请求达到我们想要的目的。

【HttpClient-HttpClient4.5使用代理服务器访问外网】通过代理服务器访问外网：
通过HttpClient官网提供的文档，发现HttpClient4.5的代理服务器做如下配置(附上HttpClient官网提供的文档的地址) --------官网地址

public static String postHttp(String url,String timestamp,String sign) { String result = ""; CloseableHttpClient httpclient = null; CloseableHttpResponse res = null; try {HttpClientContext context = HttpClientContext.create(); // 创建一个httpClient对象 httpclient = HttpClients.createDefault(); //登陆从配置文件中读取url(也可以写成参数) HttpPost httpPost = new HttpPost(url); // 设置代理HttpHost HttpHost proxy = new HttpHost("****", 8080, "http"); // 设置认证 CredentialsProvider credsProvider = new BasicCredentialsProvider(); // 添加代理用户认证-用户名和密码 credsProvider.setCredentials(new AuthScope(proxy), new UsernamePasswordCredentials("****","****")); HttpClients.custom().setDefaultCredentialsProvider(credsProvider).build(); RequestConfig config = RequestConfig.custom().setProxy(proxy).build(); // 设置参数 List formparams = new ArrayList(); formparams.add(new BasicNameValuePair("timestamp", timestamp)); formparams.add(new BasicNameValuePair("sign", sign)); UrlEncodedFormEntity uefEntity = new UrlEncodedFormEntity(formparams, "UTF-8"); httpPost.setEntity(uefEntity); httpPost.setConfig(config); // 得到响应状态码 res = httpclient.execute(httpPost,context); //获取返回对象 HttpEntity entity = res.getEntity(); // 通过EntityUtils获取返回结果内容 result = EntityUtils.toString(entity); } catch (Exception e) { e.printStackTrace(); } finally { //最后一定要释放资源 if(httpclient!=null) { try { httpclient.close(); } catch (Exception e) { e.printStackTrace(); } } }return result; }