微信朋友圈分享

1.wechat.appId以及wechat.accessToken从配置文件读取
2.getTicketCache方法以及getAccessTokenCache方法为了缓存jsapi_ticket跟access_token写的，直接缓存在系统中了，可以考虑换成保存到数据库
3.WechatTicket.java配合上面缓存方法用的，改用数据库存取的话可不用此类

控制层代码：

WechatConfigController.java

package com.icafe8.activity.service.web;import java.util.Arrays;import java.util.Iterator;import java.util.Map;import java.util.Set;import java.util.SortedMap;import java.util.TreeMap;import java.util.UUID;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.commons.codec.digest.DigestUtils;import org.apache.commons.lang.StringUtils;import org.apache.log4j.Logger;import org.json.JSONObject;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestBody;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.ResponseBody;import org.springframework.web.context.request.WebRequest;import com.icafe8.activity.UserContext;import com.icafe8.activity.common.util.PropertiesUtil;import com.icafe8.activity.service.util.DloadImgUtil;import com.icafe8.activity.service.util.Sha1;import com.icafe8.activity.service.util.WeiXinUtil;@Controllerpublic class WechatConfigController {private Logger logger = Logger.getLogger(WechatConfigController.class);/** * 微信验证接口 **/@RequestMapping(value = "/weixin", method = { RequestMethod.POST, RequestMethod.GET }, headers = "Accept=application/xml")@ResponseBodypublic String doService(HttpServletRequest servletRequest, WebRequest webRequest,HttpServletResponse response, @RequestBody(required = false) String body, Model model) {logger.info("微信通知："+servletRequest.getQueryString());String signature = servletRequest.getParameter("signature");String timestamp = servletRequest.getParameter("timestamp");String nonce = servletRequest.getParameter("nonce");String echostr = servletRequest.getParameter("echostr");// 加密/校验流程：// 1. 将token、timestamp、nonce三个参数进行字典序排序// 2. 将三个参数字符串拼接成一个字符串进行sha1加密// 3. 开发者获得加密后的字符串可与signature对比，标识该请求来源于微信String token = "activity";String[] arrStr = { token, timestamp, nonce };Arrays.sort(arrStr);StringBuilder signBuilder = new StringBuilder().append(arrStr[0]).append(arrStr[1]).append(arrStr[2]);if (DigestUtils.shaHex(signBuilder.toString()).equals(signature)) {if (StringUtils.isNotBlank(body)) {}}return echostr;}/** * 微信配置接口 **/@SuppressWarnings({"rawtypes" })@RequestMapping(value = "/wechatConfig", produces = "application/json; charset=utf-8")public @ResponseBody Object getNowPersonInfo(ServletRequest request,ServletResponse response) throws Exception {     response.setCharacterEncoding("UTF-8");     JSONObject jsonObject = new JSONObject();     //创建有序的Map用于创建签名串     SortedMap<String, Object> params = new TreeMap<String, Object>();     try {     //获取appId     String appId = PropertiesUtil.getProperty("wechat.appId");     //获取页面路径(前端获取时采用location.href.split('#')[0]获取url)     String url = request.getParameter("url");     //获取access_token     //String access_token = new WeiXinUtil().getAccessToken();     String access_token = new WeiXinUtil().getAccessTokenCache();     //获取ticket     String jsapi_ticket = new WeiXinUtil().getTicketCache(access_token);     //获取Unix时间戳(java时间戳为13位,所以要截取最后3位,保留前10位)     String timeStamp = String.valueOf(System.currentTimeMillis()).substring(0, 10);     params.put("jsapi_ticket", jsapi_ticket);     params.put("timestamp", timeStamp);     UUID uuid = UUID.randomUUID();     params.put("noncestr", uuid.toString());     params.put("url", url);     //签名     StringBuilder sb = new StringBuilder();     Set  set = params.entrySet();           Iterator   iterator=set.iterator();           while (iterator.hasNext()){              Map.Entry  mapentry = (Map.Entry) iterator.next();              sb.append(mapentry.getKey()).append("=").append(mapentry.getValue()).append("&");         }            String signatureParams = sb.toString().substring(0,sb.toString().length()-1);       String signature =  new Sha1().getDigestOfString(signatureParams.getBytes()).toLowerCase();     //得到签名再组装到Map里     params.put("signature", signature);     //传入对应的appId     params.put("appId", appId);     //组装完毕，回传              jsonObject = new JSONObject(params);     } catch (Exception e) {     logger.error("调用通过config接口注入权限验证配置失败",e);}  return jsonObject.toString();}}

WeiXinUtil.java

package com.icafe8.activity.service.util;import java.util.HashMap;import java.util.Map;import org.apache.log4j.Logger;import org.json.JSONObject;import com.icafe8.activity.common.util.CommonUtil;import com.icafe8.activity.common.util.PropertiesUtil;public class WeiXinUtil {private Logger logger = Logger.getLogger(WeiXinUtil.class);public static String URL_GET_MEDIA = "http://file.api.weixin.qq.com/cgi-bin/media/get";private static Map<String,WechatTicket> ticketMap = new HashMap<String,WechatTicket>();public String getAccessToken(){String access_token = "";try {// 拼接请求地址String requestUrl = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET";requestUrl = requestUrl.replace("APPID",PropertiesUtil.getProperty("wechat.appId"));requestUrl = requestUrl.replace("APPSECRET",PropertiesUtil.getProperty("wechat.accessToken"));// 获取网页授权凭证JSONObject jsonObject = CommonUtil.getHttpsRequest(requestUrl);if (null != jsonObject) {try {access_token = jsonObject.getString("access_token");} catch (Exception e) {int errorCode = jsonObject.getInt("errcode");String errorMsg = jsonObject.getString("errmsg");logger.error("获取access_token失败 errcode:" + errorCode + ",errmsg:" + errorMsg);}}} catch (Exception e) {logger.error("获取access_token异常");}return access_token;}public String getTicket(String access_token) throws Exception { String ticket = "";     // 拼接请求地址     String requestUrl = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=ACCESS_TOKEN&type=jsapi";     requestUrl = requestUrl.replace("ACCESS_TOKEN", access_token);     // 获取网页授权凭证     JSONObject jsonObject = CommonUtil.getHttpsRequest(requestUrl);     if (null != jsonObject) {            try {                ticket = jsonObject.getString("ticket");            } catch (Exception e) {                int errorCode = jsonObject.getInt("errcode");                String errorMsg = jsonObject.getString("errmsg");                logger.error("获取jsapi_ticket失败 errcode:" + errorCode + ",errmsg:" + errorMsg);            }      }      return ticket;}/**     * 生成签名之前必须先了解一下jsapi_ticket，jsapi_ticket是公众号用于调用微信JS接口的临时票据。     * 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。     * jsapi_ticket的有效期为7200秒，通过access_token来获取。     * 开发者必须在自己的服务全局缓存jsapi_ticket     *      */    public String getTicketCache(String access_token){        String jsapi_ticket = "";        try {        WechatTicket ticket = ticketMap.get("ticket");        String timestamp = "0";        if(null != ticket){          timestamp = ticketMap.get("ticket").getTimestamp();        }            //判断是否有效            Long now  = Long.parseLong(String.valueOf(System.currentTimeMillis()).substring(0, 10))-Long.parseLong(timestamp);            if(now > 3600 ){                //无效重新获取并写入                jsapi_ticket = new WeiXinUtil().getTicket(access_token);                WechatTicket wechatTicket = new WechatTicket();                wechatTicket.setTicket(jsapi_ticket);                wechatTicket.setTimestamp(String.valueOf(System.currentTimeMillis()).substring(0, 10));                ticketMap.put("ticket", wechatTicket);                logger.info("缓存中不存在jsapi_ticket或jsapi_ticket已经失效，重新请求微信获取ticket："+jsapi_ticket);            }else{                jsapi_ticket = ticketMap.get("ticket").getTicket();                logger.info("缓存中存在jsapi_ticket且不过期，jsapi_ticket："+jsapi_ticket);            }        } catch (Exception e) {        logger.error("获取缓存jsapi_ticket失败");        }        return jsapi_ticket;    }    public String getAccessTokenCache() {String access_token = "";        try {        WechatTicket token = ticketMap.get("access_token");        String timestamp = "0";        if(null != token){          timestamp = ticketMap.get("access_token").getTimestamp();        }            //判断是否有效            Long now  = Long.parseLong(String.valueOf(System.currentTimeMillis()).substring(0, 10))-Long.parseLong(timestamp);            if(now > 3600 ){                //无效重新获取并写入            access_token = new WeiXinUtil().getAccessToken();                WechatTicket wechatTicket = new WechatTicket();                wechatTicket.setTicket(access_token);                wechatTicket.setTimestamp(String.valueOf(System.currentTimeMillis()).substring(0, 10));                ticketMap.put("access_token", wechatTicket);                logger.info("缓存中不存在token或tonken已经失效，重新请求微信获取token："+access_token);            }else{            access_token = ticketMap.get("access_token").getTicket();            logger.info("缓存中存在token且不过期，token："+access_token);            }        } catch (Exception e) {        logger.error("获取缓存access_token失败");        }        return access_token;}}

WechatTicket.java

package com.icafe8.activity.service.util;public class WechatTicket {private String ticket;private String timestamp;public String getTicket() {return ticket;}public void setTicket(String ticket) {this.ticket = ticket;}public String getTimestamp() {return timestamp;}public void setTimestamp(String timestamp) {this.timestamp = timestamp;}}

CommonUtil.java

package com.icafe8.activity.common.util;import java.io.IOException;import org.apache.http.HttpEntity;import org.apache.http.client.methods.CloseableHttpResponse;import org.apache.http.client.methods.HttpGet;import org.apache.http.impl.client.CloseableHttpClient;import org.apache.http.impl.client.HttpClients;import org.apache.http.util.EntityUtils;import org.apache.log4j.Logger;import org.json.JSONObject;public class CommonUtil {private static Logger logger = Logger.getLogger(CommonUtil.class);/** * 发送 get请求 */public static JSONObject getHttpsRequest(String requestUrl) {JSONObject myJsonObject = new JSONObject();// 创建默认的httpClient实例CloseableHttpClient httpClient = getHttpClient();try {// 用get方法发送http请求HttpGet get = new HttpGet(requestUrl);logger.info("执行get请求:...." + get.getURI());CloseableHttpResponse httpResponse = null;// 发送get请求httpResponse = httpClient.execute(get);try {// response实体HttpEntity entity =  httpResponse.getEntity();if (null != entity) {String status = httpResponse.getStatusLine().toString();String response = EntityUtils.toString(entity);logger.info("响应状态码:" + status +",响应内容:" + response);myJsonObject = new JSONObject(response);}} finally {httpResponse.close();}} catch (Exception e) {e.printStackTrace();} finally {try {closeHttpClient(httpClient);} catch (IOException e) {e.printStackTrace();}}return myJsonObject;}private static CloseableHttpClient getHttpClient() {return HttpClients.createDefault();}private static void closeHttpClient(CloseableHttpClient client) throws IOException {if (client != null) {client.close();}}}

前端js调用.js

function load_config(){$.ajax({    url: 'wechatConfig.do?url=' + location.href.split('#')[0],    type: "GET",    contentType: "application/json; charset=utf-8",    success: function(res) {        initWeChat(res);    }});}var initWeChat = function(res) {    wx.config({        debug: false,        appId: res.appId,        timestamp: res.timestamp,        nonceStr: res.noncestr,        signature: res.signature,        jsApiList: ['chooseImage', 'uploadImage', 'downloadImage', 'onMenuShareTimeline','previewImage']    });    wx.ready(function() {        wx.checkJsApi({            jsApiList: ['chooseImage', 'onMenuShareTimeline', 'downloadImage', 'uploadImage','previewImage'],            success: function(res) {},            fail: function(res) {                alert(JSON.stringify(res));            }        });            var localUrl='http://weichat2.swjoy.com/activity/';        $("#btnSaveFile").click(function(){//console.log(localUrl+$("#pic-box").attr("src"));var imagePaths=[];imagePaths.push(localUrl+$("#pic-box").attr("src"));console.log(imagePaths)        wx.previewImage({        urls:imagePaths,        current: localUrl+$("#pic-box").attr("src")        })        //window.location.href=$("#pic-box").attr("src");        })                wx.onMenuShareTimeline({            title: getShareTimelineTitle(), // 分享标题            link: localUrl+'login.jsp', // 分享链接            imgUrl: localUrl+'/css/images/icon-icafe.jpg', // 分享图标            success: function() {                // 用户确认分享后执行的回调函数            },            cancel: function() {                // 用户取消分享后执行的回调函数            }        });    });    function getShareTimelineTitle(){    return '财富机密档案，99%的人不知道...';    }}