微信公众号获取jsapi_ticket（多类型)

一、jsapi_ticket是什么？

jsapi_ticket是公众号用于调用微信JS接口的临时票据。正常情况下，jsapi_ticket的有效期为7200秒，通过access_token来获取。由于获取jsapi_ticket的api调用次数非常有限，频繁刷新jsapi_ticket会导致api调用受限，影响自身业务，开发者必须在自己的服务全局缓存jsapi_ticket 。

二、注意事项

由于jsapi_ticket有效期为2小时，并且每天有实时调用量上限次数，所以最好开发的时候最好把jsapi_ticket存储起来，判断上次获取的jsapi_ticket是否有效，如果有效，就需要再次发起请求去获取jsapi_ticket了。

存储jsapi_ticket有2种方式

存储在内存中（本文介绍这种方式，只适用于部署单点项目，部署多点项目会造成jsapi_ticket错误）
存储在数据库中

三、多类型是什么？

前一阵子做了卡券的项目，发现获取jsapi_ticket的地址是不同的，在这里面做下说明，省的大家开发时遇到麻烦

正常获取jsapi_ticket的url地址（type为jsapi）：

https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=ACCESS_TOKEN&type=jsapi

微信卡券获取jsapi_ticket的url地址（type为wx_card）：

https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=ACCESS_TOKEN&type=wx_card

四、代码实例

JsApiTicketUtils

下文代码中使用的获取token在微信公众号获取普通access_token中

/*** jsapi_ticket是公众号用于调用微信JS接口的临时票据* jsapi_ticket的每天有调用限额* 长期存储jsapi_ticket* */
public class JsApiTicketUtils {private static Logger log = LoggerFactory.getLogger(JsApiTicketUtils.class);private static Map<String, String> jsApiTicketMap = new HashMap<>();private final static String JSAPI_TICKET = "jsapi";//jsapi_ticketprivate final static String WX_CARD_JSAPI_TICKET = "wx_card";//微信卡券jsapi_ticket/*** 获取jsapi_ticket*/public static Map<String, String> getJsApiTicket() {String time = jsApiTicketMap.get("jsapi_ticket_time");String jsApiTicket = jsApiTicketMap.get("jsapi_ticket");Long nowDate = new Date().getTime();if (jsApiTicket != null && time != null && nowDate - Long.parseLong(time) < (1.5*60*60*1000)) {log.info("jsApiTicket存在，且没有超时，返回jsApiTicketMap");return jsApiTicketMap;}synchronized (JsApiTicketUtils.class) {if(jsApiTicket != null && time != null && nowDate - Long.parseLong(time) < (1.5*60*60*1000)) {log.info("jsApiTicket存在，且没有超时，返回jsApiTicketMap");return jsApiTicketMap;} log.info("jsApiTicket超时，或者不存在，重新获取");try {//获取accessTokenString accessToken=WeiXinUtils.getAccessToken();//根据accessToken获取jsapiTicketString jsapiTicket = WeiXinUtils.getJsApiTicket(accessToken,JSAPI_TICKET);log.info("jsapi_ticket_time:"+nowDate);log.info("jsapi_ticket:"+jsapiTicket);jsApiTicketMap.put("jsapi_ticket_time", nowDate + "");jsApiTicketMap.put("jsapi_ticket", jsapiTicket); } catch (Exception e) {log.error("微信服务器发生错误",e);}return jsApiTicketMap;}/*** 获取jsapi_ticket(微信卡券)*/public static Map<String, String> getWxCardJsApiTicket() {String time = jsApiTicketMap.get("wx_card_jsapi_ticket_time");String jsApiTicket = jsApiTicketMap.get("wx_card_jsapi_ticket");Long nowDate = new Date().getTime();if (jsApiTicket != null && time != null && nowDate - Long.parseLong(time) < (1.5*60*60*1000)) {log.info("jsApiTicket存在，且没有超时，返回jsApiTicketMap");return jsApiTicketMap;}synchronized (JsApiTicketUtils.class) {if(jsApiTicket != null && time != null && nowDate - Long.parseLong(time) < (1.5*60*60*1000)) {log.info("jsApiTicket存在，且没有超时，返回jsApiTicketMap");return jsApiTicketMap;} log.info("jsApiTicket超时，或者不存在，重新获取");try {//获取accessTokenString accessToken=WeiXinUtils.getAccessToken();//根据accessToken获取jsapiTicketString jsapiTicket = WeiXinUtils.getJsApiTicket(accessToken,WX_CARD_JSAPI_TICKET);log.info("wx_card_jsapi_ticket_time:"+nowDate);log.info("wx_card_jsapi_ticket:"+jsapiTicket);jsApiTicketMap.put("wx_card_jsapi_ticket_time", nowDate + "");jsApiTicketMap.put("wx_card_jsapi_ticket", jsapiTicket); } catch (Exception e) {log.error("微信服务器发生错误",e);}return jsApiTicketMap;}
}

WeiXinUtils

下文代码中使用的UrlConUtil在Http请求UrlConUtil工具类中

/** * jsapi_ticket是公众号用于调用微信JS接口的临时票据* */
public static String getJsApiTicket(String accessToken, String type){String jsApiTicket = "";// 这个url链接地址和参数皆不能变String url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token="+accessToken+"&type="+type;try {JSONObject jsonObject = UrlConUtil.httpsRequest(url, "GET", null);logger.info("获取jsapi_ticket返回的json:"+jsonObject);Long expiresIn = jsonObject.getLong("expires_in")；logger.info("微信获取的expires_in:"+expiresIn);String ticket = jsonObject.getString("ticket");logger.info("微信获取的ticket:"+ticket);}catch (Exception e){logger.debug("获取jsapi_ticket发生异常",e);}return jsApiTicket;
}