HttpComponent-HttpClient使用-发送Post请求

public class ElephantServiceImpl implements ElephantService {

    public final static String url = "http://dxw-in.sankuai.com/api/pub/push";

    public final static String client_id = "xxxxxxxxxx";

    public final static String client_secret = "xxxxxxxxxx";
    
    

    public boolean send(List<String> receivers, String body, String sender, String type) {
        try {
            String rfc1123Date = SignatureUtils.getRfc1123Pattern();
            String authorization = SignatureUtils.getAuthorizationHeader(rfc1123Date,url,client_id,client_secret);

            CloseableHttpClient httpclient = HttpClients.createDefault();
            HttpPost httpPost = new HttpPost(url);
            httpPost.setHeader("Content-Type", "application/json;charset=utf-8");
            httpPost.setHeader("Date",rfc1123Date);
            httpPost.setHeader("Authorization",authorization);
            String json = constructJson(receivers, body, sender, type);
            StringEntity paraEntity = new StringEntity(json, ContentType.APPLICATION_JSON);
            httpPost.setEntity(paraEntity);
            CloseableHttpResponse response = httpclient.execute(httpPost);
            String responseContent = null; // 响应内容  if (response.getStatusLine().getStatusCode() == 200) {
                HttpEntity entity = response.getEntity();
                responseContent = EntityUtils.toString(entity, "UTF-8");
                System.out.println(responseContent);
            }

            response.close();

            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    private String constructJson(List<String> receivers, String body, String sender, String type) {
        String json = "{\"sender\":\"" + sender + "\", \"receivers\":" + receivers.toString() + ", \"body\": \"" + body + "\",\"messageType\":\"" + type + "\"} ";
        return json;
    }


}