最近研究微信服务号开发，发现jfinal家封装的sdk还是不错的，于是就定下来用它了。
那么问题来了：git上有demo，那么如何集成到自己的项目中呢？研究研究呗。我们框架使用的是springmvc，下面记录一下整合方法，以及遇到的一些问题：
1.自己项目中首先需要引用jfinal微信需要的jar包以及jfinal的sdk包，这个是必须的。
2.web.xml中配置，启动jfinal相关配置（必须放到所有拦截器上方）
jfinal com.jfinal.core.JFinalFilter configClass com.jfinal.weixin.demo.WeixinConfig jfinal /weixin/*
3.继承类WeixinMsgController并重写方法，可以实现消息接收功能
4.这里主要讲的是
自己写一个拦截器，拦截微信请求
写一个类Openid做注解用
package com.xtwl.reporter.weixin;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Inherited;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
//检查是否需要登录
@Target({ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Inherited
public @interface Openid {
}验证是否登录NeedOpenId（检查方法是否有上方注解 如果有 就进行微信验证）
package com.xtwl.reporter.weixin;import java.lang.reflect.Method;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Component;import org.springframework.ui.Model;import org.springframework.web.servlet.mvc.annotation.IMethodIntercepterHolder;import org.springframework.web.servlet.mvc.annotation.IMethodInvokerIntercepter;import com.jfinal.kit.PropKit;import com.jfinal.weixin.sdk.api.ApiConfig;import com.jfinal.weixin.sdk.api.ApiConfigKit;import com.jfinal.weixin.sdk.api.SnsAccessToken;import com.jfinal.weixin.sdk.api.SnsAccessTokenApi;import com.xtwl.reporter.business.StudentService;import com.xtwl.reporter.domain.Student;import com.xtwl.water.business.AdminInfoService;import com.xtwl.water.domain.AdminInfo;@Componentpublic class NeedOpenId implements IMethodInvokerIntercepter { @Autowired
private AdminInfoService adminInfoService; @Autowired
private StudentService studentService; @Override
public Object invokeHandlerMethod(Method handlerMethod, Object handler,
HttpServletRequest request, HttpServletResponse response,
Model model, IMethodIntercepterHolder chain) throws Exception { if (handlerMethod.isAnnotationPresent(Openid.class)) {
ApiConfigKit.setThreadLocalApiConfig(getApiConfig());
Openid access = handlerMethod.getAnnotation(Openid.class); if (access != null) {// 如果有标签
System.out.println("需要检查openid"); //String openid = WeiXinSession.getOpenid();
String openid="oWDxdt8F5UTP8L3XV-KcmZdLmP2Q";//测试用的
System.out.println("session中的openid 为:" + openid);
System.out.println(request.getRequestURL()+"=======request.getRequestURL()2"); if (openid != null && openid.length() > 5) {// session中已经有了。放行
return todo(chain, handlerMethod, handler, request,
response, model, openid);
} if (openid == null || openid.length() < 5) {// 没有openid 需要重新获取
String url = SnsAccessTokenApi.getAuthorizeURL(ApiConfigKit
.getApiConfig().getAppId(), request.getRequestURL().toString(), true);
String code = (String) request.getParameter("code");
System.out.println("code为:" + code + " 这是微信返回的请求"); if (code != null && code.length() > 1) {// 是请求微信之后返回来的
// 带着openid
SnsAccessToken sn = SnsAccessTokenApi
.getSnsAccessToken(ApiConfigKit.getApiConfig().getAppId(),ApiConfigKit.getApiConfig().getAppSecret(), code);
System.out.println("微信返回的openid：" + sn.getOpenid());
WeiXinSession.setOpenid(sn.getOpenid()); return todo(chain, handlerMethod, handler, request,
response, model, sn.getOpenid());
} else {
System.out.println("重定向到微信获取openid:" + url); return "redirect:" + url;
}
}
}
} return chain.doChain(handlerMethod, handler, request, response, model);
} private Object todo(IMethodIntercepterHolder chain, Method handlerMethod,
Object handler, HttpServletRequest request,
HttpServletResponse response, Model model, String openid)
throws Exception { try {
System.out.println(request.getRequestURL()+"=======request.getRequestURL()1"); if(request.getRequestURL().toString().indexOf("/mobile/post_bind/")>0){//绑定页面 放行
return chain.doChain(handlerMethod, handler, request, response, model);
} // 根据openid获取用户信息 本地的
AdminInfo admin = adminInfoService.getItemByOpenid(openid);
System.out.println(admin + "========数据库中的admin"); if (admin == null || admin.getId() == null) {// 未绑定
System.out.println("redirect:/mobile/bind_phone"); return "redirect:/mobile/bind_phone";
} else {
Student s = studentService.getItemById(admin.getOtherid());
WeiXinSession.setWeiXinAdminInfo(admin);
WeiXinSession.setWeiXinStudent(s);
} return chain.doChain(handlerMethod, handler, request, response, model);
} catch (Exception e) {
e.printStackTrace(); return chain.doChain(handlerMethod, handler, request, response, model);
}
}
public ApiConfig getApiConfig() {
ApiConfig ac = new ApiConfig();
// 配置微信 API 相关常量
ac.setToken(PropKit.get("token"));
ac.setAppId(PropKit.get("appId"));
ac.setAppSecret(PropKit.get("appSecret"));
/**
* 是否对消息进行加密，对应于微信平台的消息加解密方式：
* 1：true进行加密且必须配置 encodingAesKey
* 2：false采用明文模式，同时也支持混合模式
*/
ac.setEncryptMessage(PropKit.getBoolean("encryptMessage", false));
ac.setEncodingAesKey(PropKit.get("encodingAesKey", "setting it in config file")); return ac;
}
}接下来就是使用了
@RequestMapping("/mobile/myself")@Openidpublic String toIndex(Mapmodel, Principal principal,HttpServletRequest request){
model.put("principal", principal); try {
AdminInfo admin = WeiXinSession.getWeiXinAdminInfo();;
Student s = WeiXinSession.getWeiXinStudent();
model.put("classes", classes);
model.put("admin", admin);
model.put("student", s);
} catch (Exception e) {
e.printStackTrace();
} return "mobile/person.ftl";
} 
