springmvc集成jfinal微信 微信服务号开发

    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）

	<filter>
		<filter-name>jfinal</filter-name>
		<filter-class>com.jfinal.core.JFinalFilter</filter-class>
		<init-param>
			<param-name>configClass</param-name>
			<param-value>com.jfinal.weixin.demo.WeixinConfig</param-value>
		</init-param>
	</filter>

	<filter-mapping>
		<filter-name>jfinal</filter-name>
		<url-pattern>/weixin/*</url-pattern>
	</filter-mapping>

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

<bean id="methodInvokerIntercepterManager"
		class="org.springframework.web.servlet.mvc.annotation.MethodInvokerIntercepterManager">
		<property name="intercepters">
			<list>
				<bean class="com.xtwl.reporter.weixin.NeedOpenId"></bean><!-- 处理是否微信认证 -->
				<bean class="com.xtwl.framework.security.utils.MethodPrivilegeIntercepter">
				<property name="loginPage" value="/workspace/login" />
                <property name="noauthPage" value="global/error/401.ftl" />
				<property name="rejectMessage" value="您无权访问" />
				<property name="loginPrompt" value="请先登录" />
				</bean>
			</list>
		</property>
	</bean>

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(Map<String, Object>model, 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";
	}