Java工具类--http请求-post

支持各类型报文与参数说明

说明：

• url : 地址
• timeout：超时时间 如3秒 3*1000
• contentType：类型 如
  • application/x-www-form-urlencoded 
  • application/json
  • application/xml
• requestBody：报文内容 如 
  • application/x-www-form-urlencoded时 为 "key=value&key2=value2"
  • application/json时 为 " \"key\":\"value\",  \"key2\":\"value2\" "
  • application/xml时 为 "" + "" + str_head + "" + "" + str_body + "" + ""
• encoding：字符编码 如 utf-8

    public static String postJsonBody(String url, int timeout, String contentType, String requestBody, String encoding){
        HttpPost post = new HttpPost(url);
        try {
            post.setHeader("Content-type", contentType);
            RequestConfig requestConfig = RequestConfig.custom()
                    .setSocketTimeout(timeout)
                    .setConnectTimeout(timeout)
                    .setConnectionRequestTimeout(timeout)
                    .setExpectContinueEnabled(false).build();
            post.setConfig(requestConfig);

            post.setEntity(new StringEntity(requestBody, encoding));
            logger.info("[HttpUtils Post] begin invoke url:" + url + " , params:" + requestBody);
            CloseableHttpResponse response = httpclient.execute(post);
            try {
                HttpEntity entity = response.getEntity();
                try {
                    if(entity != null){
                        String str = EntityUtils.toString(entity, encoding);
                        logger.info("[HttpUtils Post]Debug response, url :" + url + " , response string :"+str);
                        return str;
                    }
                } finally {
                    if(entity != null){
                        entity.getContent().close();
                    }
                }
            } finally {
                if(response != null){
                    response.close();
                }
            }
        } catch (UnsupportedEncodingException e) {
            logger.error("UnsupportedEncodingException", e);
        } catch (Exception e) {
            logger.error("Exception", e);
        } finally {
            post.releaseConnection();
        }
        return "";
    }