HTTP方式Post通信发送报文

/**
     * 
描述: 使用HttpPost传输 有用户名密码验证的xml格式的WebService调用
     *
     * @param url    webservice的URL
     * @param xmlStr xml格式的数据字符串
     * @return 返回传输响应的结果字符串
     */
    public static String postXMLAuthWithHttpPost(String url, String xmlStr) {

        CloseableHttpClient httpclient = HttpClients.createDefault();
        HttpEntity entity = null;
        HttpEntity Rentity = null;
        String retStr = "";
        CloseableHttpResponse response = null;
        try {
            entity = new StringEntity(xmlStr, "UTF-8");
            HttpPost hp = new HttpPost(url);
            hp.addHeader("Content-Type", "application/soap+xml;charset=UTF-8");
            hp.setEntity(entity);
            response = httpclient.execute(hp);
            Rentity = response.getEntity();
            if (Rentity != null) {
                retStr = EntityUtils.toString(Rentity, "UTF-8");
            }
        } catch (Exception e) {
        } finally {
            // 关闭连接,释放资源
            try {
                if (response != null) {
                    response.close();
                }
                if (httpclient != null) {
                    httpclient.close();
                }
            } catch (IOException e) {
            }
        }
        return retStr;
    }