微信商城开源版二次开发（二）
最近想了解如何Java对接微信平台，快速搭建完整项目开发，发现网上有很对开源的这类二开源码。https://gitee.com/luozijing12...就是其中一个，介绍可以打开网页自行查看，下面介绍了该项目如何对接微信公众号和部署。
下面是我自己在云服务器上利用docker快速部署的http://81.69.254.72/index。 体验账户： admin/admin123
SKD中接发微信公众号消息的路由模式
微信公众号会有许多不同类型的消息，有文本、图片、地理等等，为了更好的区分不同消息的处理，JAVA 微信开源包-- https://github.com/Wechat-Gro... 利用路由模式来处理。
首先业务代码包里注入路由器 和wxMpService（http通知处理类）
@Bean
public WxMpMessageRouter messageRouter(WxMpService wxMpService) {
final WxMpMessageRouter newRouter = new WxMpMessageRouter(wxMpService);
// 记录所有事件的日志 （异步同步执行属性）
newRouter.rule().handler(this.logHandler).next();
// 接收客服会话管理事件 handler可放进List多个处理
newRouter.rule().async(false).msgType(EVENT).event(KF_CREATE_SESSION)
.handler(this.kfSessionHandler).end();
newRouter.rule().async(false).msgType(EVENT).event(KF_CLOSE_SESSION)
.handler(this.kfSessionHandler).end();
newRouter.rule().async(false).msgType(EVENT).event(KF_SWITCH_SESSION)
.handler(this.kfSessionHandler).end();
//......
}异步和同步执行方式，满足不同业务属性，如有些数据需要异步同步给其他业务侧，就可用异步处理方式，这里的异步处理用来双线程，一个线程异步执行，一个线程异步等待，方便知悉结果,也提升了代码可靠性
WxMpXmlOutMessage res = null;
final List> futures = new ArrayList();
Iterator var8 = matchRules.iterator();
while(var8.hasNext()) {
final WxMpMessageRouterRule rule = (WxMpMessageRouterRule)var8.next();
if (rule.isAsync()) {
// 线程池异步执行，futruesTask封装结果
futures.add(this.executorService.submit(new Runnable() {
public void run() {
rule.service(wxMessage, context, mpService, WxMpMessageRouter.this.sessionManager, WxMpMessageRouter.this.exceptionHandler);
}
}));
} else {
// 同步执行，进入下面的handler和切面处理
res = rule.service(wxMessage, context, mpService, this.sessionManager, this.exceptionHandler);
this.log.debug("End session access: async=false, sessionId={}", wxMessage.getFromUser());
this.sessionEndAccess(wxMessage);
}
}
// 有异步任务每，异步获取结果，判断异步是否完成
if (futures.size() > 0) {
this.executorService.submit(new Runnable() {
public void run() {
Iterator var1 = futures.iterator();
while(var1.hasNext()) {
Future future = (Future)var1.next();
try {
future.get();
WxMpMessageRouter.this.log.debug("End session access: async=true, sessionId={}", wxMessage.getFromUser());
WxMpMessageRouter.this.sessionEndAccess(wxMessage);
// 对异常的处理
} catch (InterruptedException var4) {
WxMpMessageRouter.this.log.error("Error happened when wait task finish", var4);
Thread.currentThread().interrupt();
} catch (ExecutionException var5) {
WxMpMessageRouter.this.log.error("Error happened when wait task finish", var5);
}
}
}
});
} 举例子， wx文本消息进入对应后路由处理
try {
Iterator var6 = this.interceptors.iterator();
// 路由拦截器数组 也是自定义，方便拓展功能，这里并未用到
WxMpMessageInterceptor interceptor;
do {
if (!var6.hasNext()) {
WxMpXmlOutMessage res = null;
Iterator var11 = this.handlers.iterator();
while(var11.hasNext()) {
WxMpMessageHandler handler = (WxMpMessageHandler)var11.next();
if (handler != null) {
// 上述定义的路由处理器数组
res = handler.handle(wxMessage, (Map)context, wxMpService, sessionManager);
}
}
return res;
}
interceptor = (WxMpMessageInterceptor)var6.next();
// 先执行拦截器业务
} while(interceptor.intercept(wxMessage, (Map)context, wxMpService, sessionManager));
return null;
} catch (WxErrorException var9) {
exceptionHandler.handle(var9);
return null;
}初始化中具体的handler业务,在网页配置页面配置好如何进行自动回复消息,有半匹配和全匹配两种,也有图片\语音\语音等,这些数据是存储在微信云端.具体可以扫描本系统绑定的公众号,在页面中自动配置http://81.69.254.72/wxmp/wxau...进行尝试.
@Override
public WxMpXmlOutMessage handle(WxMpXmlMessage wxMessage,
Map context, WxMpService wxMpService,
WxSessionManager sessionManager) {
//组装回复消息
if (!wxMessage.getMsgType().equals(XmlMsgType.EVENT)) {
WxMpXmlOutMessage rs;
//TODO 可以选择将消息保存到本地
WxUser wxUser = wxUserMapper.selectOne(Wrappers.lambdaQuery()
.eq(WxUser::getOpenId,wxMessage.getFromUser()));
if(WxConsts.KefuMsgType.TEXT.equals(wxMessage.getMsgType())){//1、先处理是否有文本关键字回复
//先全匹配 网页中设置的自动全匹配服务,可以打开网页自己操作试试 http://81.69.254.72/wxmp/wxautoreply
List listWxAutoReply = wxAutoReplyService.list(Wrappers
.query().lambda()
.eq(WxAutoReply::getType, ConfigConstant.WX_AUTO_REPLY_TYPE_3)
.eq(WxAutoReply::getRepMate, ConfigConstant.WX_REP_MATE_1)
.eq(WxAutoReply::getReqKey, wxMessage.getContent()));
if(listWxAutoReply!=null && listWxAutoReply.size()>0){
rs = this.getWxMpXmlOutMessage(wxMessage,listWxAutoReply,wxUser,wxMsgService);
if(rs != null){
return rs;
}
}
//再半匹配
listWxAutoReply = wxAutoReplyService.list(Wrappers
.query().lambda()
.eq(WxAutoReply::getType, ConfigConstant.WX_AUTO_REPLY_TYPE_3)
.eq(WxAutoReply::getRepMate, ConfigConstant.WX_REP_MATE_2)
.like(WxAutoReply::getReqKey, wxMessage.getContent()));
if(listWxAutoReply!=null && listWxAutoReply.size()>0) {
rs = this.getWxMpXmlOutMessage(wxMessage, listWxAutoReply, wxUser,wxMsgService);
if (rs != null) {
return rs;
}
}
}
//2、再处理消息回复
List listWxAutoReply = wxAutoReplyService.list(Wrappers
.query().lambda()
.eq(WxAutoReply::getType, ConfigConstant.WX_AUTO_REPLY_TYPE_2)
.eq(WxAutoReply::getReqType, wxMessage.getMsgType()));
rs = this.getWxMpXmlOutMessage(wxMessage,listWxAutoReply,wxUser,wxMsgService);
return rs;
}
return null;
} 
微信公众号token校验
小程序交互时是通过token来进行验证用户是否登录小程序,因此每次交互需要校验用户登录有效性, 实际上通过微信获取登录的用户信息吗,获取后存入redis的过期来校验用户是否失效,这是通用性的解决方案,也有不足之处,就是session超时不好控制,影响体验.
//session过期后请求微信获取用户信息 然后存入redis 设置过期时间
public WxMaJscode2SessionResult jsCode2SessionInfo(String jsCode) throws WxErrorException {
WxMaConfig config = this.getWxMaConfig();
Map params = new HashMap(8);
params.put("appid", config.getAppid());
params.put("secret", config.getSecret());
params.put("js_code", jsCode);
params.put("grant_type", "authorization_code");
String result = this.get("https://api.weixin.qq.com/sns/jscode2session", Joiner.on("&").withKeyValueSeparator("=").join(params));
return WxMaJscode2SessionResult.fromJson(result);
} spring security拦截器校验session有效性
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
//获取header中的thirdSession
String thirdSessionHeader = request.getHeader(ConfigConstant.HEADER_THIRDSESSION);
if(StrUtil.isNotBlank(thirdSessionHeader)){
//获取缓存中的ThirdSession
String key = WxMaConstants.THIRD_SESSION_BEGIN + ":" + thirdSessionHeader;
Object thirdSessionObj = redisTemplate.opsForValue().get(key);
if(thirdSessionObj == null) {//session过期
AjaxResult r = AjaxResult.error(MyReturnCode.ERR_60001.getCode(), MyReturnCode.ERR_60001.getMsg());
this.writerPrint(response, r);
return Boolean.FALSE;
}else {
String thirdSessionStr = String.valueOf(thirdSessionObj);
ThirdSession thirdSession = JSONUtil.toBean(thirdSessionStr, ThirdSession.class);
ThirdSessionHolder.setThirdSession(thirdSession);//设置thirdSession
}
}else{
AjaxResult r = AjaxResult.error(MyReturnCode.ERR_60002.getCode(), MyReturnCode.ERR_60002.getMsg());
this.writerPrint(response, r);
return Boolean.FALSE;
}
return Boolean.TRUE;
}
private void writerPrint(HttpServletResponse response, AjaxResult r) throws IOException {
//返回超时错误码，触发小程序重新登录
response.setCharacterEncoding(CommonConstants.UTF8);
response.setContentType(MediaType.APPLICATION_JSON_VALUE);
PrintWriter writer = response.getWriter();
writer.print(JSONUtil.parseObj(r));
if(writer != null){
writer.close();
}
}