springmvc integrates jfinal WeChat WeChat service account development

I recently researched the development of WeChat service accounts and found that the SDK packaged by jfinal is quite good, so I decided to use it.

So the question is: there is a demo on git, so how to integrate it into your own project? Just study and study. Our framework uses springmvc. Let’s record the integration method and some problems encountered:

1. In your project, you first need to reference the jar package required by jfinal WeChat and the sdk package of jfinal. This is necessary.

2. Configure in web.xml to start jfinal related configuration (must be placed above all interceptors)

	<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. Inherit the class WeixinMsgController and rewrite the method to achieve the message receiving function

4. The main thing here is

Write an interceptor by yourself to intercept WeChat requests

<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>

Write a class Openid as annotation and use it

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 {

}

to verify whether you are logged in to NeedOpenId (check whether the method has the above annotation and perform WeChat verification if so)

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;
	}
}

The next step is to use it

@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";
	}