這篇文章主要為大家展示了“微信公眾號怎么獲取access_token”，內(nèi)容簡而易懂，條理清晰，希望能夠幫助大家解決疑惑，下面讓小編帶領(lǐng)大家一起研究并學(xué)習(xí)一下“微信公眾號怎么獲取access_token”這篇文章吧。
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access_token是公眾號的全局接口調(diào)用憑據(jù)，我們和微信服務(wù)器進行交互，服務(wù)器通過access_token判斷我們是誰(哪個公眾號服務(wù)的請求)。所以 我們在開發(fā)過程中服務(wù)端拿到的access_token是一定不能顯式暴露給外部，否則將導(dǎo)致數(shù)據(jù)安全問題。別人拿到你的accessToken操作你的公眾號。access_token的有效期目前為2個小時，過期需要再次獲取。
下面是一種獲取access_token方式
1.項目添加httpclient相關(guān)依賴，示例使用httpclient請求微信服務(wù)器，獲取微信返回結(jié)果。
org.apache.httpcomponents httpclient 4.5.3 org.apache.httpcomponents httpcore 4.4.6
2.httpClientUtil類，網(wǎng)上隨手找的 試了一下本例的doget方法 沒有問題，其他的 暫不考慮
public class HttpClientUtil { public static String doGet(String url, Map param) { // 創(chuàng)建Httpclient對象 CloseableHttpClient httpclient = HttpClients.createDefault(); String resultString = ""; CloseableHttpResponse response = null; try { // 創(chuàng)建uri URIBuilder builder = new URIBuilder(url); if (param != null) { for (String key : param.keySet()) { builder.addParameter(key, param.get(key)); } } URI uri = builder.build(); // 創(chuàng)建http GET請求 HttpGet httpGet = new HttpGet(uri); // 執(zhí)行請求 response = httpclient.execute(httpGet); // 判斷返回狀態(tài)是否為200 if (response.getStatusLine().getStatusCode() == 200) { resultString = EntityUtils.toString(response.getEntity(), "UTF-8"); } } catch (Exception e) { e.printStackTrace(); } finally { try { if (response != null) { response.close(); } httpclient.close(); } catch (IOException e) { e.printStackTrace(); } } return resultString; } public static String doGet(String url) { return doGet(url, null); } public static String doPost(String url, Map param) { // 創(chuàng)建Httpclient對象 CloseableHttpClient httpClient = HttpClients.createDefault(); CloseableHttpResponse response = null; String resultString = ""; try { // 創(chuàng)建Http Post請求 HttpPost httpPost = new HttpPost(url); // 創(chuàng)建參數(shù)列表 if (param != null) { List paramList = new ArrayList<>(); for (String key : param.keySet()) { paramList.add(new BasicNameValuePair(key, param.get(key))); } // 模擬表單 UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList,"utf-8"); httpPost.setEntity(entity); } // 執(zhí)行http請求 response = httpClient.execute(httpPost); resultString = EntityUtils.toString(response.getEntity(), "utf-8"); } catch (Exception e) { e.printStackTrace(); } finally { try { response.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } return resultString; } public static String doPost(String url) { return doPost(url, null); } public static String doPostJson(String url, String json) { // 創(chuàng)建Httpclient對象 CloseableHttpClient httpClient = HttpClients.createDefault(); CloseableHttpResponse response = null; String resultString = ""; try { // 創(chuàng)建Http Post請求 HttpPost httpPost = new HttpPost(url); // 創(chuàng)建請求內(nèi)容 StringEntity entity = new StringEntity(json, ContentType.APPLICATION_JSON); httpPost.setEntity(entity); // 執(zhí)行http請求 response = httpClient.execute(httpPost); resultString = EntityUtils.toString(response.getEntity(), "utf-8"); } catch (Exception e) { e.printStackTrace(); } finally { try { response.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } return resultString; }}
3.第三步就是簡單的測試代碼了
public class WeChatAccessTokenTest { public static void main(String[] args) { Map params = new HashMap<>(); // TODO: 2018/11/16 *號改成真實appid params.put("appid", "******"); // TODO: 2018/11/16 *號改成真實secret params.put("secret", "******"); params.put("grant_type", "client_credential"); String response = HttpClientUtil.doGet("https://api.weixin.qq.com/cgi-bin/token", params); JSONObject accessTokenObject = JSONObject.parseObject(response); String accessToken = accessTokenObject.getString("access_token"); Long expire = accessTokenObject.getLong("expires_in"); System.out.println(accessToken); }}
以上是“微信公眾號怎么獲取access_token”這篇文章的所有內(nèi)容，感謝各位的閱讀！相信大家都有了一定的了解，希望分享的內(nèi)容對大家有所幫助，如果還想學(xué)習(xí)更多知識，歡迎關(guān)注創(chuàng)新互聯(lián)行業(yè)資訊頻道！
本文名稱：微信公眾號怎么獲取access_token-創(chuàng)新互聯(lián)
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