微信公众号发送模版消息

    在我们购买商品或其他操作的时候，这时候微信公众号会推送相关模版消息。接下来简单介绍开发流程：（本文以订单推送为例）

首先在测试号新建模版消息

格式如下：

{{first.DATA}} 
用户名：{{keyword1.DATA}} 
订单号：{{keyword2.DATA}} 
订单金额：{{keyword3.DATA}} 
商品信息：{{keyword4.DATA}} 
{{remark.DATA}}

这里会生成一个模版ID，后面会用到

然后后台在上传订单接口，上传成功后调用发送模版消息

public void sendOrderTemplateMessage(Order order) {
    AugeWechatUser wechatUser = augeWechatUserMapper.selectByPhone(order.getPhone());
    String goodsInfo = "";
    for (AugeSaleItem augeSaleItem : order.getData()) {
        goodsInfo += augeSaleItem.getItemName() + "×" + augeSaleItem.getItemNum() + "\n\t\t\t";
    }
    DataInfo first = new DataInfo("恭喜你购买成功！", "#ff0000");
    DataInfo keyword1 = new DataInfo(wechatUser.getNickName(), "#ff0000");
    DataInfo keyword2 = new DataInfo(order.getOrderNumber(), "#ff0000");
    DataInfo keyword3 = new DataInfo("￥" + order.getSumPrice() + "元", "#ff0000");
    DataInfo keyword4 = new DataInfo(goodsInfo, "#ff0000");
    DataInfo remark = new DataInfo("欢迎再次购买！", "#000000");

    OrderData orderData = new OrderData(first, keyword1, keyword2, keyword3, keyword4, remark);
    OrderTemplateMessage templateMessage = new OrderTemplateMessage();
    templateMessage.setTouser(wechatUser.getId());
    templateMessage.setTemplate_id(orderTemplateId);//模版ID
    templateMessage.setData(orderData);

    OkHttpUtil.getInstance().doPost(WechatConstant.getTemplateUrl(wechatAccessTokenService.takeAccessToken()), 
JSON.toJSONString(templateMessage));
}

简单介绍 OkHttpUtil

OkHttp是一个第三方类库，用于Android中请求网络。

public String doPost(String url, String param) {
        MediaType JSON = MediaType.parse("application/json; charset=utf-8");
        RequestBody body = RequestBody.create(JSON, param);
        Request request = new Request.Builder()
                .url(url)
                .post(body)
                .build();
        Call call = okHttpClient.newCall(request);
        try {
            Response response = call.execute();
            return response.body().string();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

注意配置订单模版ID

@Value("#{setting.ordertemplateid}")
private String orderTemplateId;