Summary of experience and experience of calling wechat cash red envelope interface with Java

After reading the blog about wechat payment written before these days, many people still read it. After reading the message, I don't know whether it is because the blog is not detailed enough or what the situation is. Most of them ask me for the source code. I think programmers still need such a thinking process, so they don't give the source code directly. As the saying goes, "it's better to teach people to fish than to teach people to fish". Therefore, I hope to spend some time typing the code myself while reading the article. Well, no more nonsense, let's share the use of wechat cash red envelope interface this time.

The following is an introduction to the cash red envelope in the wechat development document:

Cash red envelope is one of the marketing tools provided by wechat payment merchant platform. It has been deeply loved by merchants and users since its launch. Merchants can issue cash red envelopes to wechat payment users through this platform. After the user receives the red envelope, the funds reach the user's wechat payment change account, which has the same use export as other funds in the zero wallet; If the user does not receive it, the funds will be returned to the merchant's wechat payment account after 24 hours.

Product meaning

Wechat cash red envelopes have always been favored by users because their funds are carried in cash. In recent years, cash red envelopes have played an important role in the Spring Festival Gala; In the daily operation, it also brings a warm response to the merchant's marketing activities. In general, the cash red envelope plays an important role in the following scenarios, including but not limited to:

To sum up, WeChat cash cash packets are a marketing tool, which can increase user stickiness by paying attention to official account and registration. This time, I will share my experience in program development

I. conditions for using wechat cash red envelope function

1. It has a wechat merchant platform and complete secret key certificates

2. The merchant Pingtai needs to have enough balance to use (if not enough, TenPay can be used to recharge from the merchant platform)

3. It is better to have wechat payment development foundation

II. Key points and difficulties of development

1 wechat signature algorithm

2. Use of httpclient and certificate

3. Reading wechat documents（ https://pay.weixin.qq.com/wiki/doc/api/tools/cash_coupon.php?chapter=13_4&index=3 ）