JSAPI微信支付java

小咪咪 2022-10-13 05:19 272阅读 0赞

前期准备：

首先要有公众号（服务号）和商户号；在微信商户平台-->产品中心-->AppID账号管理中，关联AppID账号

1、导入maven依赖

<dependency>
       <groupId>com.github.wxpay</groupId>
       <artifactId>wxpay-sdk</artifactId>
       <version>0.0.3</version>
    </dependency>

2、公众号设置（注：支付授权目录写到访问路径的controller的那一级就可以了，不要写到方法）

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3、获取openid

@RequestMapping("/")
        public void wxlogin(HttpServletResponse response) {
            try {
            // 第一步：用户同意授权，获取code
            String url = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=" +             wxAppID +
                    "&redirect_uri=" + wxUrl+"/test/wxcallback" +
                    "&response_type=code" +
                    "&scope=snsapi_base" +
                    "&state=STATE#wechat_redirect";
    
                response.sendRedirect(url);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        @RequestMapping("/wxcallback")
        public String wxcallback(String code){
            // 第二步：通过code换取网页授权access_token
            String url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=" + wxAppID +
                    "&secret=" + secret +
                    "&code=" + code +
                    "&grant_type=authorization_code";
            ResponseEntity<String> res = restTemplate.getForEntity(url, String.class);
            JSONObject jsonObject = JSONObject.parseObject(res.getBody());
            
            return jsonObject.get("openid").toString();

4、统一下单（生成签名的顺序不要变）

public Result unifiedOrderJSAPI(Map<String,Object> orderMap, HttpServletRequest request) {
    
            Map<String, String> returnMap = new HashMap<>();
            Map<String, String> responseMap = new HashMap<>();
            Map<String, String> data = new HashMap<>();
            String orderNo = null;
            try {
                //如果订单不为空
                if (orderMap != null){
                    orderNo = orderMap.get("id").toString();
                    Double amount = Double.parseDouble(orderMap.get("sfprice").toString());
    
                    //支付参数
                    WXPay wxpay = new WXPay(config);
    
                    data.put("appid", config.getAppID());
                    data.put("secret", config.getSecret());
                    data.put("body", "订单支付");
                    data.put("mch_id", config.getMchID());
                    data.put("notify_url", config.getWxPayNotifyUrl());//异步通知地址（请注意必须是外网）
                    data.put("out_trade_no", orderNo);
                    data.put("spbill_create_ip", getIpAddress(request)); //自己的服务器IP地址
                    data.put("openid", orderMap.get("openId").toString()); //openId
    
                    data.put("total_fee", String.valueOf((int) (amount * 100)));
                    data.put("trade_type", "JSAPI");//交易类型JSAPI支付
                    String s = WXPayUtil.generateSignature(data, config.getKey());  //签名
                    data.put("sign", s);//签名
                    //使用官方API请求预付订单
                    Map<String, String> resultMap = wxpay.unifiedOrder(data);
                    //获取返回码
                    String returnCode = resultMap.get("return_code");
                    //若返回码为SUCCESS，则会返回一个result_code,再对该result_code进行判断
                    if ("SUCCESS".equals(returnCode)) {
                        String resultCode = resultMap.get("result_code");
                        if ("SUCCESS".equals(resultCode)) {
                            responseMap = resultMap;
                        }
                    }
                    if (responseMap == null || responseMap.isEmpty()) {
                        return ResultUtil.error("获取预支付交易会话标识失败"+responseMap);
                    }
                    // 3、签名生成算法
                    Long time = System.currentTimeMillis() / 1000;
                    String timestamp = time.toString();
                    returnMap.put("appId", config.getAppID());
                    returnMap.put("nonceStr", responseMap.get("nonce_str"));
                    returnMap.put("package", "prepay_id="+responseMap.get("prepay_id"));
                    returnMap.put("signType", "MD5");
                    returnMap.put("timeStamp", timestamp);
                    returnMap.put("paySign", WXPayUtil.generateSignature(returnMap, config.getKey()));//微信支付签名
                }
                return ResultUtil.success(returnMap);
            } catch (Exception e) {
                logger.error("订单号：{}，错误信息：{}", orderNo, e.getStackTrace());
                return ResultUtil.error("微信支付统一下单失败");
            }
        }

5、获取jssdk配置信息

@RequestMapping("/weixinInfo")
        public Result weixinInfo( @RequestBody Map<String,Object> param) {
            try {
                //1、获取AccessToken jsapi_ticket
                Map<String,String> tokenMap = tokenMap();
                String accessToken = tokenMap.get("accessToken");
                String jsapiTicket = tokenMap.get("ticket");
                //2、时间戳和随机字符串
                String noncestr = UUID.randomUUID().toString().replace("-", "").substring(0, 16);//随机字符串
                String timestamp = String.valueOf(System.currentTimeMillis() / 1000);//时间戳
                //3、获取url
                String url = config.getUrl();
                //4、将参数排序并拼接字符串
                String str = "jsapi_ticket=" + jsapiTicket + "&noncestr=" + noncestr + "&timestamp=" + timestamp + "&url=" + param.get("url");
                logger.info("参数拼接的字符串：" + str);
                //5、将字符串进行sha1加密
                String signature = SHA1(str);
                logger.info("签名：" + signature);
                Map<String, Object> data = new HashMap<>();
                data.put("timestamp", timestamp);
                data.put("nonceStr", noncestr);
                data.put("signature", signature);
                data.put("accessToken", accessToken);
                data.put("appId", config.getAppID());
                return ResultUtil.success(data);
            } catch (Exception e) {
                logger.error("获取微信信息的错误", e);
                return ResultUtil.error("获取微信信息的错误");
            }
    
        }
        public String getAccessToken(){
            String url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential" + "&appid=" + config.getAppID() + "&secret="+ config.getSecret();
            ResponseEntity<String> res = restTemplate.getForEntity(url, String.class);
            JSONObject jsonObject = JSONObject.parseObject(res.getBody());
            String accessToken = jsonObject.getString("access_token");
            redisTemplate.opsForValue().set("accessToken",accessToken,2L, TimeUnit.HOURS);
            return  accessToken;
        }
        public String getTicket(String accessToken){
            String url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=" + accessToken + "&type=jsapi";// 这个url链接和参数不能变
            ResponseEntity<String> res = restTemplate.getForEntity(url, String.class);
            JSONObject jsonObject = JSONObject.parseObject(res.getBody());
            String ticket = jsonObject.getString("ticket");
            redisTemplate.opsForValue().set("ticket",ticket,2L, TimeUnit.HOURS);
            return  ticket;
        }
        public Map<String,String> tokenMap(){
            Map<String,String> tokenMap=new HashMap<>();
            String accessToken = null;
            String ticket = null;
            if (redisTemplate.opsForValue().get("access_token") != null){
                accessToken = redisTemplate.opsForValue().get("access_token").toString();
            }else{
                accessToken = getAccessToken();
            }
            if (redisTemplate.opsForValue().get("ticket") != null){
                ticket = redisTemplate.opsForValue().get("ticket").toString();
            }else{
                ticket = getTicket(accessToken);
            }
            tokenMap.put("accessToken",accessToken);
            tokenMap.put("ticket",ticket);
            return tokenMap;
        }
        public static String SHA1(String decript) {
            try {
                MessageDigest digest = java.security.MessageDigest.getInstance("SHA-1");
                digest.update(decript.getBytes());
                byte messageDigest[] = digest.digest();
                // Create Hex String
                StringBuffer hexString = new StringBuffer();
                // 字节数组转换为 十六进制 数
                for (int i = 0; i < messageDigest.length; i++) {
                    String shaHex = Integer.toHexString(messageDigest[i] & 0xFF);
                    if (shaHex.length() < 2) {
                        hexString.append(0);
                    }
                    hexString.append(shaHex);
                }
                return hexString.toString();
    
            } catch (NoSuchAlgorithmException e) {
                logger.error("SHA1发生错误", e);
            }
            return "";
        }

6、支付页面

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