Java接入微信分享需要做什么?

微信分享官方地址:https://qydev.weixin.qq.com/wiki/index.php?title=%E5%BE%AE%E4%BF%A1JS%E6%8E%A5%E5%8F%A3

1. 获取access_token

    　　access_token有效期是7200,这里使用redis做缓存,缓存时间为7000(秒)

        String accessTokenCache = (String) redisUtil.get("access_token");
        if (accessTokenCache != null) {
            return accessTokenCache;
        }

        Map<String, Object> accessMap = new HashMap<>(8);
        accessMap.put("appid", 你的appid);
        accessMap.put("secret", 你的秘钥);
        accessMap.put("grant_type", "client_credential");
        //这个url链接地址和参数皆不能变
        String access_result = restTemplate.getForObject(
            "https://api.weixin.qq.com/cgi-bin/token?grant_type={grant_type}&appid={appid}&secret={secret}",
            String.class, accessMap); 

        AccessTokenBO accessTokenBO = JSON.parseObject(access_result,AccessTokenBO.class);
        reidsUtil.set("access_token",accessToeknBO.getAccessToken,7000);

• 获取ticket

         String ticketCache = (String) redisUtil.get("ticket");
         if (ticketCache != null) {
            return ticketCache;
         }
　　　　　
     
         // 上面获取accessToken的方法
         String accessToken = getAccessToken();

         Map<String, Object> ticketMap = new HashMap<>(8);
         ticketMap.put("access_token", access_token);
         String ticket_result = restTemplate.getForObject(SHARE_GET_TICKET, String.class, ticketMap);
         TicketBO bo = JSON.parseObject(ticket_result,TicketBO.class);

         redisUtil.set("ticket", ticket, 7000);

• 前端传url获取微信分享配置

      这个url必须和页面 #前的参数一模一样,不能多也不能少,微信分享的link可以是其他地址,和url在同一域名下就好

  

public WxShareConfigVO getWxShareConfigVO(String url) {
    url = URLDecoder.decode(url, "UTF-8");
    WxShareConfigVO vo = new WxShareConfigVO();

    String noncestr = create_nonce_str();
    String timestamp = create_timestamp();
    String jsapi_ticket = getShareTicket();

    // 这个参数顺序也不能变的
    String string1 = "jsapi_ticket=" + jsapi_ticket
            + "&noncestr=" + noncestr
            + "&timestamp=" + timestamp
            + "&url=" + url;

    String signature = "";

    try {
        MessageDigest crypt = MessageDigest.getInstance("SHA-1");
        crypt.reset();
        crypt.update(string1.getBytes("UTF-8"));
        signature = byteToHex(crypt.digest());
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }

    vo.setTimestamp(timestamp);
    vo.setNonceStr(noncestr);
    vo.setSignature(signature);
    vo.setAppid(你的appid)

    return vo;

}

private String byteToHex(final byte[] hash) {
    Formatter formatter = new Formatter();
    for (byte b : hash) {
        formatter.format("%02x", b);
    }
    String result = formatter.toString();
    formatter.close();
    return result;
}



private String create_nonce_str() {
    return UUID.randomUUID().toString().replaceAll("-", "");
}


private String create_timestamp() {
    return Long.toString(System.currentTimeMillis() / 1000);
}