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此接口大致的流程是：用户创建时间戳，随机字符串，当前需要分享的页面的url三个变量，接着将自己的appid和APPsecret作为请求参数获取access_token，再根据access_token获取jsapi_ticket, 并将获取的jsapi-ticket进行加密、校验以及自己创建的三个变量进行签名，注意签名过程案按照 key 值 ASCII 码升序排序封装成json格式的数据传送到前台JS页面，具体程序如下；
public class WeiXinShareAction extends HttpServlet { private static final long serialVersionUID = 1L; private Integer main_count = 888; private String flag = "1"; private Log logger = LogFactory.getLog(this.getClass()); private String filePath = "/B.txt"; protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { JsonObject jsonObject = new JsonObject(); String ticket = null; String[] wxInfo = new String[] { "wx007344f87ae48300", "5442edc712b6846bdd1c058b7f2318fe" }; WeiXinUtil wxu = new WeiXinUtil(); String ticketResString; try { ticketResString = wxu.getShareJsapiTicket(wxInfo); if (StringUtils.isNotEmpty(ticketResString)) { JSONObject ticketJSONObject = JSONObject.fromObject(ticketResString); if (ticketJSONObject.getInt("errcode") == 0) { ticket = JSONObject.fromObject(ticketResString).getString("ticket"); } } } catch (Exception e) { e.printStackTrace(); } if (StringUtils.isEmpty(ticket)) { jsonObject.addProperty("errcode", 10002); jsonObject.addProperty("errmsg", "ticket_error"); this.responseWrite(jsonObject.toString(), response); return; } String noncestr = this.createNonceStr(); int timestamp = this.createTimestamp(); String requestRefererURL = request.getHeader("referer"); flag = request.getParameter("temp"); logger.info("flag--------------" + flag); //这里是保存点击次数 //没有数据库的情况下 保证服务重启后点击次数不清零 //利用线程锁 使用IO流 对点击次数进行修改保存 Thread_readFile thf4 = new Thread_readFile(); thf4.start(); logger.warn("requestRefererURL: " + requestRefererURL); String signature = this.createSignature(noncestr, ticket, timestamp, requestRefererURL); jsonObject.addProperty("countNum", main_count);//点击次数 jsonObject.addProperty("errcode", 0);// jsonObject.addProperty("errmsg", "");// jsonObject.addProperty("wxuser", wxInfo[0]); // appId jsonObject.addProperty("timestamp", timestamp);//时间戳 jsonObject.addProperty("noncestr", noncestr);//随机字符串 jsonObject.addProperty("signature", signature);//签名 response.setHeader("Access-Control-Allow-Origin", "*"); this.responseWrite(jsonObject.toString(), response); } private void responseWrite(String content, HttpServletResponse response) { try { response.setCharacterEncoding("utf-8"); response.getWriter().write(content); } catch (Exception e) { logger.error("responseWrite error in WeiXinShareAction", e); } }}登录后复制获取access_token;这里开发过程中要注意微信为了减轻对服务器的访问压力 限制了access_token每天的生成次数 以及使用时长；由于限制时长为7200s 于是做了一个判断 再生成一个token后的2小时用同一个token ；这里仅仅只是一个小接口 于是选择将 最近一次的生成时间 以及 token 存为静态变量，
/** * 微信分享，获取access_token */ private String getWeiXinAccessToken(String[] wxInfo) throws Exception { //得到当前时间 long current_time = System.currentTimeMillis(); // 每次调用，判断expires_in是否过期，如果token时间超时，重新获取，expires_in有效期为7200 if ((current_time - last_time) / 1000 >= 7200) { logger.info("第一次访问"+current_time); logger.info("(current_time - last_time) / 1000===="+(current_time - last_time) / 1000); String url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" + wxInfo[0] + "&secret=" + wxInfo[1]; String result = this.httpReqExecute(url); this.logger.warn("from weixin api accessToken: " + result); try { last_time = current_time; if (StringUtils.isNotEmpty(result)) {// 解析respContent，并获取其中的更新的key, accessToken = JSONObject.fromObject(result).getString("access_token");// 保存access_token return accessToken; } } catch (Exception e) { logger.error("getAccessToken error in WeiXinShareAction", e); } }else{ logger.info("第二次访问"+last_time); logger.info("(current_time - last_time) / 1000===="+(current_time - last_time) / 1000); logger.info("from weixin api accessToken:"+accessToken); return accessToken; } return null; }登录后复制根据access_token获取jsapiTicket
/** * 微信分享，获取jsapiTicket */ public String getShareJsapiTicket(String[] wxInfo) throws Exception { String access_Token = this.getWeiXinAccessToken(wxInfo); if (StringUtils.isEmpty(access_Token)) { // 获取 accessToken 失败 //this.logger.warn(siteId + " accessToken is empty."); JsonObject jsonObject = new JsonObject(); jsonObject.addProperty("errcode", "10000"); jsonObject.addProperty("errmsg", "access_error"); return jsonObject.toString(); } String url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=" + access_Token + "&type=jsapi"; String jsapiTicket = this.httpReqExecute(url); this.logger.warn(" from weixin api jsapiTicket is: " + jsapiTicket); if (StringUtils.isNotEmpty(jsapiTicket)) { return jsapiTicket; } return null; }登录后复制Http远程调用
private String httpReqExecute(String url) { String result = ""; DefaultHttpClient httpclient = null; try { httpclient = new DefaultHttpClient(); HttpPost httppost = new HttpPost(url); // 执行 HttpResponse response = httpclient.execute(httppost); HttpEntity entity = response.getEntity(); if (entity != null && response.getStatusLine().getStatusCode() == 200) { result = EntityUtils.toString(entity, "UTF-8"); } } catch (Exception e) { logger.error(" WeiXinShareAction 调用微信 API 失败！", e); } finally {// 关闭连接，释放资源 httpclient.getConnectionManager().shutdown(); } return result; }登录后复制返回成功
from weixin api accessToken: {"access_token":"12_9UgVn7tFVtvf_7r4Lq4V9W9-pQdZpqWxVjFsPoF3hv3J5_XfwQWqauj4n9-ZMikC1_oCp0IpBxjpZr-Ty8XzG8QMeV2QVukFz5_NP7kjAB05MX9msxRg0FlpAAMjonrrh5wxSEFfKHEc0_BDHFKjAFAXVA","expires_in":7200} from weixin api jsapiTicket is: {"errcode":0,"errmsg":"ok","ticket":"HoagFKDcsGMVCIY2vOjf9j_Us44Qhuo4KdgH5u8ewMjOCTUO44m1hKqgEsJYIyFR9HWrmmz-wrsb9KLdmpATRw","expires_in":7200}登录后复制相关文章：
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