微信小程序支付

 1.定义支付商家参数

 1 public class WXPay {
 2     //小程序appid
 3     public static final String appid = "wx52028f436ab96a6d";
 4     //微信支付的商户id
 5     public static final String mch_id = "1564197831";
 6     //微信支付的商户密钥
 7     public static final String key = "SDFDFSDF1SD23F13ASD2F1S32DF1A3S2";
 8     //支付成功后的服务器回调url，这里填PayController里的回调函数地址
 9     public static final String notify_url = "https://signup.shengweiholdings.com/school/api/pay/wxNotify";
10     //public static final String notify_url = "http://127.0.0.1:8082/api/pay/wxNotify";//测试
11     //签名方式，固定值
12     public static final String SIGNTYPE = "MD5";
13     //交易类型，小程序支付的固定值为JSAPI
14     public static final String TRADETYPE = "JSAPI";
15     //微信统一下单接口地址
16     public static final String pay_url = "https://api.mch.weixin.qq.com/pay/unifiedorder";
17 }
商家参数

2 .提示：支付前先生成订单

 1 /**
 2  * 
 3  * 向服务请求支付参数：通过小程序定义的 requestPayParam()发起
 4  * 
 5  * 
 6  */
 7   requestPayParam() {
 8     let that = this;
 9     util.request(api.Orderpay, {ip: that.data.ip}).then(function (res) {
10       if (res.code === 0) {
11         let payParam = res.data;
12         wx.requestPayment({
13           timeStamp: res.data.timeStamp,
14           nonceStr: res.data.nonceStr,
15           package: res.data.package,
16           //可以通过后台定义的商家参数返回也可以写死
17           signType: 'MD5',
18           paySign: res.data.paySign,
19           //支付成功
20           'success': function(res) {
21             wx.redirectTo({
22               url: '/pages/Pre-registration/payResult/payResult?status=true',
23             })
24           },
25           //支付失败
26           'fail': function(res) {
27             wx.redirectTo({
28               url: '/pages/Pre-registration/payResult/payResult?status=false',
29             })
30           }
31         })
32       }
33     });
34   },
前台请求

3 .后台请求接口  提示：这里有一个预支付

  1 @RestController
  2 public class WXPayApi {
  3     @Autowired
  4     private WxUserService wxUserService;
  5 
  6     @Autowired
  7     private WxOrderService wxOrderService;
  8 
  9     @Autowired
 10     private OrderRecordService orderRecordService;
 11 
 12     /**
 13      * 请求支付接口
 14      * @param userId
 15      * @param request
 16      * @return
 17      * @throws Exception
 18      */
 19     @PostMapping("/api/pay/wxPay")
 20     public R wxPay(@LoginUser Long userId,HttpServletRequest request) throws Exception {
 21         WxUserEntity entity = wxUserService.get(userId);
 22         String openId = entity.getUserOpenid();
 23 
 24         Map ordermap=wxOrderService.orderMessage(userId);
 25         String goodsName = ordermap.get("goodsName").toString();
 26         String orderNum = ordermap.get("orderNum").toString();
 27         String total_fee = ordermap.get("total_fee")+ "";
 28         total_fee="1";
 29         Map<String, Object> response = new HashMap<>();//返回给小程序端需要的参数
 30         response.put("success", true);
 31         response.put("msg", ""); 
 32         try {
 33             //生成的随机字符串
 34             String nonce_str = getRandomStringByLength(32);
 35             //商品名称
 36             String body = goodsName;
 37             //获取客户端的ip地址
 38             String spbill_create_ip = getIpAddr(request);
 39 
 40             //组装参数，用户生成统一下单接口的签名
 41             Map<String, String> packageParams = new HashMap<>();
 42             packageParams.put("appid", WXPay.appid);
 43             packageParams.put("mch_id", WXPay.mch_id);
 44             packageParams.put("nonce_str", nonce_str);
 45             packageParams.put("body", body);
 46             packageParams.put("out_trade_no", orderNum);//商户订单号,自己的订单ID
 47             packageParams.put("total_fee", total_fee);//支付金额，这边需要转成字符串类型，否则后面的签名会失败
 48             packageParams.put("spbill_create_ip", spbill_create_ip);
 49             packageParams.put("notify_url", WXPay.notify_url);//支付成功后的回调地址
 50             packageParams.put("trade_type", WXPay.TRADETYPE);//支付方式
 51             packageParams.put("openid", openId + "");//用户的openID，自己获取
 52 
 53             String prestr = PayUtil.createLinkString(packageParams); // 把数组所有元素，按照“参数=参数值”的模式用“&”字符拼接成字符串
 54 
 55             //MD5运算生成签名，这里是第一次签名，用于调用统一下单接口
 56             String mysign = PayUtil.sign(prestr, WXPay.key, "utf-8").toUpperCase();
 57 
 58             //拼接统一下单接口使用的xml数据，要将上一步生成的签名一起拼接进去
 59             String xml = "<xml>" + "<appid>" + WXPay.appid + "</appid>"
 60                     + "<body><![CDATA[" + body + "]]></body>"
 61                     + "<mch_id>" + WXPay.mch_id + "</mch_id>"
 62                     + "<nonce_str>" + nonce_str + "</nonce_str>"
 63                     + "<notify_url>" + WXPay.notify_url + "</notify_url>"
 64                     + "<openid>" + openId + "</openid>"
 65                     + "<out_trade_no>" + orderNum + "</out_trade_no>"
 66                     + "<spbill_create_ip>" + spbill_create_ip + "</spbill_create_ip>"
 67                     + "<total_fee>" + total_fee + "</total_fee>"//支付的金额，单位：分
 68                     + "<trade_type>" + WXPay.TRADETYPE + "</trade_type>"
 69                     + "<sign>" + mysign + "</sign>"
 70                     + "</xml>";
 71 
 72             //调用统一下单接口，并接受返回的结果
 73             String result = PayUtil.httpRequest(WXPay.pay_url, "POST", xml);
 74 
 75             // 将解析结果存储在HashMap中
 76             Map map = PayUtil.doXMLParse(result);
 77 
 78             String return_code = (String) map.get("return_code");//返回状态码
 79             String result_code = (String) map.get("result_code");//返回状态码
 80             String return_msg = (String) map.get("return_msg");//错误描述
 81             System.out.println("++++++++return_code:" + return_code);
 82             System.out.println("++++++++result_code:" + result_code);
 83             System.out.println("--------return_msg:" + return_msg);
 84 
 85             if ("SUCCESS".equals(return_code) && return_code.equals(result_code)) {
 86                 System.out.println("---------组装预付单信息数据");
 87                 System.out.println("map信息：" + map);
 88                 String prepay_id = (String) map.get("prepay_id");//返回的预付单信息
 89                 response.put("nonceStr", nonce_str);
 90                 response.put("package", "prepay_id=" + prepay_id);
 91                 Long timeStamp = System.currentTimeMillis() / 1000;
 92                 response.put("timeStamp", timeStamp + "");//这边要将返回的时间戳转化成字符串，不然小程序端调用wx.requestPayment方法会报签名错误
 93                 //拼接签名需要的参数
 94                 String stringSignTemp = "appId=" + WXPay.appid + "&nonceStr=" + nonce_str + "&package=prepay_id=" + prepay_id + "&signType=MD5&timeStamp=" + timeStamp;
 95                 //再次签名，这个签名用于小程序端调用wx.requesetPayment方法
 96                 String paySign = PayUtil.sign(stringSignTemp, WXPay.key, "utf-8").toUpperCase();
 97                 response.put("paySign", paySign);
 98             }
 99             response.put("appid", WXPay.appid);
100         } catch (Exception e) {
101             e.printStackTrace();
102             response.put("success", false);
103             response.put("msg", e.getMessage());
104         }
105         return R.ok().put("data", response);
106     }
107 
108     /**
109      * 微信支付回调
110      * @param request
111      * @param response
112      * @throws Exception
113      */
114     @RequestMapping(value = "/api/pay/wxNotify", method = RequestMethod.POST)
115     public void wxNotify(HttpServletRequest request, HttpServletResponse response) throws Exception {
116         System.out.println("进入微信支付回调----------");
117         BufferedReader br = new BufferedReader(new InputStreamReader(request.getInputStream()));
118         String line = null;
119         StringBuilder sb = new StringBuilder();
120         while ((line = br.readLine()) != null) {
121             sb.append(line);
122         }
123         br.close();
124         //sb为微信返回的xml
125         String notityXml = sb.toString();
126         String resXml = "";
127         Map map = PayUtil.doXMLParse(notityXml);
128         String returnCode = (String) map.get("return_code");
129         System.out.println("returnCodeL:" + returnCode);
130         if ("SUCCESS".equals(returnCode)) {
131             String result_code = (String) map.get("result_code");
132             //验证签名是否正确
133             Map<String, String> validParams = PayUtil.paraFilter(map);  //回调验签时需要去除sign和空值参数
134             String prestr = PayUtil.createLinkString(validParams);
135             System.out.println("回调参数======" + map);
136             //根据微信官网的介绍，此处不仅对回调的参数进行验签，还需要对返回的金额与系统订单的金额进行比对等
137             if (PayUtil.verify(prestr, (String) map.get("sign"), WXPay.key, "utf-8")) {
138                 System.out.println("签名正确=======");
139                 /**此处添加自己的业务逻辑代码start**/
140                 String transactionId = (String) map.get("transaction_id");//微信支付单号
141                 String orderNumber = (String) map.get("out_trade_no");//订单号
142                 String timeEnd = (String) map.get("time_end");//支付完成时间
143                 String totalFee = (String) map.get("total_fee");//订单金额
144                 WxOrderEntity order = wxOrderService.findByOrderNumber(orderNumber);
145                 if(order != null){
146                     System.out.println("订单不为空");
147                     //修改订单表状态---改为以报名
148                     order.setState(WxOrderStateEnum.entry.getCode());
149                     wxOrderService.save(order);
150                     //支付成功，添加订单记录信息
151                     OrderRecordEntity orderRecord = new OrderRecordEntity();
152                     orderRecord.setOrderNumber(orderNumber);
153                     orderRecord.setPrice((long) Integer.parseInt(totalFee));
154                     orderRecord.setTransactionId(transactionId);
155                     orderRecord.setPaymentMethod("微信");
156                     orderRecord.setCreatedDt(TimeUtil.getDataTime());
157                     orderRecordService.save(orderRecord);
158                     System.out.println("添加订单记录成功");
159                     //通知微信服务器已经支付成功
160                     resXml = "<xml>" + "<return_code><![CDATA[SUCCESS]]></return_code>"
161                             + "<return_msg><![CDATA[OK]]></return_msg>" + "</xml> ";
162                     System.out.println("通知微信服务器返回的信息"+resXml);
163                 }else{
164                     resXml = "<xml>" + "<return_code><![CDATA[FAIL]]></return_code>"
165                             + "<return_msg><![CDATA[订单不存在]]></return_msg>" + "</xml> ";
166                     System.out.println("通知微信服务器返回的信息"+resXml);
167                 }
168             } else {
169                 System.out.println("验签失败-------");
170                 resXml = "<xml>" + "<return_code><![CDATA[FAIL]]></return_code>"
171                         + "<return_msg><![CDATA[验签失败]]></return_msg>" + "</xml> ";
172             }
173         } else {
174             resXml = "<xml>" + "<return_code><![CDATA[FAIL]]></return_code>"
175                     + "<return_msg><![CDATA[报文为空]]></return_msg>" + "</xml> ";
176         }
177 
178         BufferedOutputStream out = new BufferedOutputStream(
179                 response.getOutputStream());
180         out.write(resXml.getBytes());
181         out.flush();
182         out.close();
183     }
184 
185     //获取随机字符串
186     private String getRandomStringByLength(int length) {
187         String base = "abcdefghijklmnopqrstuvwxyz0123456789";
188         Random random = new Random();
189         StringBuffer sb = new StringBuffer();
190         for (int i = 0; i < length; i++) {
191             int number = random.nextInt(base.length());
192             sb.append(base.charAt(number));
193         }
194         return sb.toString();
195     }
196 
197     //获取IP
198     private String getIpAddr(HttpServletRequest request) {
199         String ip = request.getHeader("X-Forwarded-For");
200         if (StringUtils.isNotEmpty(ip) && !"unKnown".equalsIgnoreCase(ip)) {
201             //多次反向代理后会有多个ip值，第一个ip才是真实ip
202             int index = ip.indexOf(",");
203             if (index != -1) {
204                 return ip.substring(0, index);
205             } else {
206                 return ip;
207             }
208         }
209         ip = request.getHeader("X-Real-IP");
210         if (StringUtils.isNotEmpty(ip) && !"unKnown".equalsIgnoreCase(ip)) {
211             return ip;
212         }
213         return request.getRemoteAddr();
214     }
215 
216     public static void main(String[] args) throws Exception {
217 
218         SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
219         Date d = sdf.parse("20190919085723");
220         SimpleDateFormat sdf1 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
221         System.out.println(sdf1.parse(sdf1.format(d)));
222     }
223 }
请求支付接口
posted @ 2019-12-30 10:11  以后啊  阅读(252)  评论(0)    收藏  举报