微信授权登录、获取微信用户信息

一、Application

@SpringBootApplication
public class MyApplication {

    public static void main(String[] args) {
        SpringApplication.run(MyApplication .class, args);
    }

    @Bean
    RestTemplate getRestTemplate(){
        RestTemplate restTemplate = new RestTemplate();
        //解决中文乱码问题
        restTemplate.getMessageConverters().set(1, new StringHttpMessageConverter(StandardCharsets.UTF_8));
        return restTemplate;
    }
}

二、Service

@Slf4j
@Service
public class WeiXinServiceImpl implements IWeiXinService {

    @Autowired
    RestTemplate restTemplate;

    @Autowired
    IUserService userServiceImpl;

    @Autowired
    IWeiXinUserService weiXinUserServiceImpl;

    private static final String APPID="APPID";

    private static final String SECRET="SECRET";

    /**
     * 微信授权登录
     * @param code
     * @return
     */
    @Override
    public WeiXinLoginResult wxAuthLogin(String code) {
        String url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid="+APPID+"&secret="+SECRET+"&code="+code+"&grant_type=authorization_code";

        String jsonResult = restTemplate.getForObject(url,String.class);
        log.info("微信登录返回值："+jsonResult);

        if(!jsonResult.contains("openid")){
            log.info("微信登录失败");
            throw new ServiceException("微信登录失败");
        }

        WeiXinAccessTokenResult weiXinAccessTokenResult = JSONArray.parseObject(jsonResult, WeiXinAccessTokenResult.class);
        User user = userServiceImpl.getUserByWxOpenid(weiXinAccessTokenResult.getOpenid());

        WeiXinLoginResult loginResult = new WeiXinLoginResult();
        loginResult.setWxOpenid(weiXinAccessTokenResult.getOpenid());
        if(user!=null){
            //已绑定 直接登录
            loginResult.setToRegistBindPhone(YesNoEnum.NO.getCode()+"");
        }else{
            //先跳转到注册绑定页面
            requestWeiXinUserinfo(weiXinAccessTokenResult.getAccess_token(),weiXinAccessTokenResult.getOpenid());
            loginResult.setToRegistBindPhone(YesNoEnum.YES.getCode()+"");
        }
        return loginResult;
    }

    /**
     * 获取微信用户信息
     * @param accessToken
     * @param openId
     */
    @Override
    public void requestWeiXinUserinfo(String accessToken, String openId) {
        String url = "https://api.weixin.qq.com/sns/userinfo?access_token="+accessToken+"&openid="+openId;

        String jsonResult = restTemplate.getForObject(url,String.class);
        log.info("获取微信用户信返回值："+jsonResult);

        if(!jsonResult.contains("openid")){
            log.info("获取微信用户信息失败");
        }
        WeiXinUserDTO weiXinUserDTO = JSONArray.parseObject(jsonResult, WeiXinUserDTO.class);
        weiXinUserServiceImpl.saveOrUpdate(weiXinUserDTO);
    }

}