HTTPClient的方式请求外部接口

HTTPClient的方式请求外部接口

POST请求,Map入参

public static String post(String url, Map<String, String> paramsMap) {
        CloseableHttpClient client = HttpClients.createDefault();
        String responseText = "";
        CloseableHttpResponse response = null;
        try {
            HttpPost method = new HttpPost(url);
            if (paramsMap != null) {
                List<NameValuePair> paramList = new ArrayList<>();
                for (Map.Entry<String, String> param : paramsMap.entrySet()) {
                    NameValuePair pair = new BasicNameValuePair(param.getKey(), param.getValue());
                    paramList.add(pair);
                }
                method.setEntity(new UrlEncodedFormEntity(paramList, ENCODING));
            }
            response = client.execute(method);
            HttpEntity entity = response.getEntity();
            if (entity != null) {
                responseText = EntityUtils.toString(entity);
            }
        } catch (Exception e) {
            log.error("http post request failed", e);
            throw new BusinessException("http post request failed", e);
        } finally {
            try {
                assert response != null;
                response.close();
            } catch (Exception e) {
                log.error("response close failed", e);
            }
        }
        return responseText;
    }

POST请求，JsonString 入参

public static String jsonPost(String url, String params) {
        CloseableHttpClient client = HttpClients.createDefault();
        String responseText = "";
        CloseableHttpResponse response = null;
        try {
            HttpPost method = new HttpPost(url);
            method.addHeader("Content-Type", "application/json;charset=UTF-8");
            method.setHeader("Accept", "application/json");
            StringEntity stringEntity = new StringEntity(params, Charset.forName("UTF-8"));
            stringEntity.setContentType("text/json");
            method.setEntity(stringEntity);
            response = client.execute(method);
            HttpEntity entity = response.getEntity();
            if (entity != null) {
                responseText = EntityUtils.toString(entity);
            }
        } catch (Exception e) {
            log.error("http post request failed", e);
            throw new BusinessException("http post request failed", e);
        } finally {
            try {
                assert response != null;
                response.close();
            } catch (Exception e) {
                log.error("response close failed", e);
            }
        }
        return responseText;
    }

GET请求方式

public static String get(String url, Map<String, String> paramsMap) {
        CloseableHttpClient client = HttpClients.createDefault();
        String responseText = "";
        CloseableHttpResponse response = null;
        try {
            StringBuilder getUrl = new StringBuilder(url + "?");
            if (paramsMap != null) {
                for (Map.Entry<String, String> param : paramsMap.entrySet()) {
                    getUrl.append(param.getKey()).append("=").append(URLEncoder.encode(param.getValue(), ENCODING)).append("&");
                }
            }
            HttpGet method = new HttpGet(getUrl.toString());
            response = client.execute(method);
            HttpEntity entity = response.getEntity();
            if (entity != null) {
                responseText = EntityUtils.toString(entity);
            }
        } catch (Exception e) {
            log.error("http get request failed", e);
            throw new BusinessException("http get request failed", e);
        } finally {
            try {
                if (response != null) {
                    response.close();
                }
            } catch (Exception e) {
                 log.error("",e);
            }
        }
        return responseText;
    }