一 问题引入
我们之前的登陆都是:网页http传来请求,我们java来做这个请求的校验。
但是如果微信小程序登陆,就要用到相关的api来实现。
二 快速入门
1 引入依赖
官方依赖,在里面找合适的,去设置版本号。由于我这里在父工程就设置过了,所以省略
Maven Repository: com.github.binarywang » weixin-java-miniapp (mvnrepository.com)
<dependencies><dependency><groupId>com.github.binarywang</groupId><artifactId>weixin-java-miniapp</artifactId></dependency>
2 配置类
使用微信小程序api要设置微信小程序的id和密钥。我们在yml文件设置,并自己设置配置类来读取
wx:miniapp:appId: 你的微信小程序id # 小程序微信公众平台appIdsecret: 你的微信小程序id秘钥 # 小程序微信公众平台api秘钥
@Component
@Data
@ConfigurationProperties(prefix = "wx.miniapp")
public class WxConfigProperties {private String appId;private String secret;
}
3 将微信小程序对象放入spring中
package com.atguigu.daijia.customer.config;import cn.binarywang.wx.miniapp.api.WxMaService;
import cn.binarywang.wx.miniapp.api.impl.WxMaServiceImpl;
import cn.binarywang.wx.miniapp.config.impl.WxMaDefaultConfigImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;@Component
public class WxConfigOperator {@Autowiredprivate WxConfigProperties wxConfigProperties;@Beanpublic WxMaService wxMaService() {//微信小程序id和秘钥WxMaDefaultConfigImpl wxMaConfig = new WxMaDefaultConfigImpl();wxMaConfig.setAppid(wxConfigProperties.getAppId());wxMaConfig.setSecret(wxConfigProperties.getSecret());WxMaService service = new WxMaServiceImpl();service.setWxMaConfig(wxMaConfig);return service;}
}
4 具体实现登陆
service层
实现思路:前端约定,从前端传来code,传回去用户的id。
我们先用微信小程序的方法来解析code,获得openid。判断是否是第一次登陆。如果是,则将信息保存到数据库,并返回用户id。如果不是直接返回用户id。
package com.atguigu.daijia.customer.service.impl;import cn.binarywang.wx.miniapp.api.WxMaService;
import cn.binarywang.wx.miniapp.bean.WxMaJscode2SessionResult;
import com.atguigu.daijia.customer.mapper.CustomerInfoMapper;
import com.atguigu.daijia.customer.mapper.CustomerLoginLogMapper;
import com.atguigu.daijia.customer.service.CustomerInfoService;
import com.atguigu.daijia.model.entity.customer.CustomerInfo;
import com.atguigu.daijia.model.entity.customer.CustomerLoginLog;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import lombok.extern.slf4j.Slf4j;
import me.chanjar.weixin.common.error.WxErrorException;
import org.checkerframework.checker.units.qual.A;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;@Slf4j
@Service
@SuppressWarnings({"unchecked", "rawtypes"})
public class CustomerInfoServiceImpl extends ServiceImpl<CustomerInfoMapper, CustomerInfo> implements CustomerInfoService {@Autowiredprivate WxMaService wxMaService;@Autowiredprivate CustomerInfoMapper customerInfoMapper;@Autowiredprivate CustomerLoginLogMapper customerLoginLogMapper;// 微信小程序登陆@Overridepublic Long login(String code) {//1 获取code值,使用微信工具包对象,获取微信唯一标识openidString openid = null;try {WxMaJscode2SessionResult sessionInfo =wxMaService.getUserService().getSessionInfo(code);openid = sessionInfo.getOpenid();} catch (WxErrorException e) {throw new RuntimeException(e);}//2 根据openid查询数据库表,判断是否第一次登录//如果openid不存在返回null,如果存在返回一条记录//select * from customer_info ci where ci.wx_open_id = ''LambdaQueryWrapper<CustomerInfo> lqw = new LambdaQueryWrapper<>();lqw.eq(CustomerInfo::getWxOpenId, openid);CustomerInfo customerInfo = customerInfoMapper.selectOne(lqw);//3 如果第一次登录,添加信息到用户表if(customerInfo == null) {customerInfo = new CustomerInfo();customerInfo.setNickname(String.valueOf(System.currentTimeMillis()));customerInfo.setAvatarUrl("https://oss.aliyuncs.com/aliyun_id_photo_bucket/default_handsome.jpg");customerInfo.setWxOpenId(openid);customerInfoMapper.insert(customerInfo);}//4 记录登录日志信息CustomerLoginLog customerLoginLog = new CustomerLoginLog();customerLoginLog.setCustomerId(customerInfo.getId());customerLoginLog.setMsg("小程序登录");customerLoginLogMapper.insert(customerLoginLog);//5 返回用户idreturn customerInfo.getId();}
}