微信官方文档地址：subscribeMessage.send | 微信开放文档

相关开发代码：

@Service
public class WxMessageSendServiceImpl extends BaseService implements IWxMessageSendService {
    /**
     * 定义编码格式 UTF-8
     */
    public static final String URL_PARAM_DECODECHARSET_UTF8 = "UTF-8";

    // redis中保存的access_token
    public static final String WXNIMI_ACCESS_TOKEN = "WXNIMI_ACCESS_TOKEN";
    // access_token接口调用凭证
    public static final String ACCESS_TOKEN_URL = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential"
            + "&appid=APPID&secret=APPSECRET";
    // 微信消息发送
    public static final String REQUEST_URL = "https://api.weixin.qq