Apache的HttpClient创建CloseableHttpClient的例子

7. 最后关闭HttpClient资源.

public String doPost(String url, String params) {

String result = “”;

CloseableHttpClient httpclient = null;

CloseableHttpResponse response = null;

HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();

HttpSession session = request.getSession();

if (session != null) {

httpclient = (CloseableHttpClient) session.getAttribute(“httpclient”);

}

if (httpclient == null) {

httpclient = HttpClients.createDefault();

}

try {

HttpPost httppost = new HttpPost(url);

httppost.setHeader(“accept”, “/”);

httppost.setHeader(“connection”, “Keep-Alive”);

httppost.setHeader(“User-Agent”, “Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.71 Safari/537.36”);