微信支付流程

都是我自己工作中開(kāi)發(fā)的，親測(cè)可用，不喜勿噴。

controller中我是這么寫(xiě)的，你們需要根據(jù)自己的業(yè)務(wù)需求改動(dòng)。ResponseBean是我自己封裝的，你們可以改成你們想要的形式。

/** * 微信統(tǒng)一下單接口 * @return */ @RequestMapping(value = '/doUnifiedOrder', method = RequestMethod.POST) public ResponseBean doUnifiedOrder(@RequestBody Map<String,Object> req) { Map resultMap=new HashMap(); String openid = (String) req.get('openId'); WXPay wxpay =null; try { //初始化證書(shū) myConfig.initCert(); wxpay= new WXPay(myConfig); } catch (Exception e) { e.printStackTrace(); } //生成的隨機(jī)字符串 String nonce_str = WXPayUtil.generateNonceStr(); //獲取客戶(hù)端的ip地址 //獲取本機(jī)的ip地址 InetAddress addr = null; try { addr = InetAddress.getLocalHost(); } catch (UnknownHostException e) { e.printStackTrace(); } //支付金額，需要轉(zhuǎn)成字符串類(lèi)型，否則后面的簽名會(huì)失敗 String payOutMoney = WxMoney.changeY2F(String.valueOf(req.get('money'))); String tradeName = (String) req.get('tradeName'); if(tradeName!=null&&tradeName.length()>0){ }else{ tradeName = '課程支付'; } String body = tradeName; //商戶(hù)訂單號(hào) String out_trade_no= WXPayUtil.generateNonceStr(); //統(tǒng)一下單接口參數(shù) HashMap<String, String> data = new HashMap<String, String>(); data.put('appid', 你的appid); data.put('mch_id', 商戶(hù)id); data.put('nonce_str', nonce_str); data.put('body', body); data.put('out_trade_no',out_trade_no); data.put('total_fee', payOutMoney); data.put('spbill_create_ip', '127.0.0.1'); data.put('notify_url', 回調(diào)地址); data.put('trade_type','JSAPI'); data.put('openid', openid); try { Map<String, String> rMap = wxpay.unifiedOrder(data); String return_code = (String) rMap.get('return_code'); String result_code = (String) rMap.get('result_code'); String nonceStr = WXPayUtil.generateNonceStr(); resultMap.put('nonceStr', nonceStr); Long timeStamp = System.currentTimeMillis() / 1000; if ('SUCCESS'.equals(return_code) && return_code.equals(result_code)) { String prepayid = rMap.get('prepay_id'); resultMap.put('package', 'prepay_id='+prepayid); resultMap.put('signType', 'MD5'); //這邊要將返回的時(shí)間戳轉(zhuǎn)化成字符串，不然小程序端調(diào)用wx.requestPayment方法會(huì)報(bào)簽名錯(cuò)誤 resultMap.put('timeStamp', timeStamp + ''); //再次簽名，這個(gè)簽名用于小程序端調(diào)用wx.requesetPayment方法 resultMap.put('appId',myConfig.getAppID()); String sign = WXPayUtil.generateSignature(resultMap, myConfig.getKey()); resultMap.put('paySign', sign); resultMap.put('out_trade_no',out_trade_no); ResponseBean responseBean = new ResponseBean(HttpStatus.OK.value(),'微信支付',resultMap); return responseBean; }else{ResponseBean responseBean = new ResponseBean(HttpStatus.OK.value(),'微信支付失敗','微信支付失敗');return responseBean; } } catch (Exception e) { ResponseBean responseBean = new ResponseBean(HttpStatus.OK.value(),'微信支付失敗','微信支付失敗'); e.printStackTrace(); return responseBean; } }

微信退款代碼（需要傳退款的訂單id）

public ResponseBean refund(Map<String, Object> req) { Map resultMap=new HashMap(); String buyId = (String) req.get('buyId'); WXPay wxpay =null; try { myConfig.initCert();//初始化證書(shū) wxpay= new WXPay(myConfig); } catch (Exception e) { e.printStackTrace(); } //生成的隨機(jī)字符串 String nonce_str = WXPayUtil.generateNonceStr(); //獲取客戶(hù)端的ip地址 //獲取本機(jī)的ip地址 InetAddress addr = null; try { addr = InetAddress.getLocalHost(); } catch (UnknownHostException e) { e.printStackTrace(); } //支付金額，需要轉(zhuǎn)成字符串類(lèi)型，否則后面的簽名會(huì)失敗// int total_fee= (int) req.get('money'); String payOutMoney = WxMoney.changeY2F(String.valueOf(req.get('money')));// String body = (String) req.get('z'); //商戶(hù)訂單號(hào) String out_trade_no= WXPayUtil.generateNonceStr(); //統(tǒng)一下單接口參數(shù) HashMap<String, String> data = new HashMap<String, String>(); try { data.put('appid', myConfig.getAppID()); data.put('mch_id', myConfig.getMchID()); data.put('nonce_str', nonce_str); data.put('sign_type', 'MD5'); data.put('out_trade_no',buyId);//微信訂單號(hào) data.put('out_refund_no', out_trade_no);//商戶(hù)退款單號(hào) data.put('total_fee',payOutMoney);//支付金額，微信支付提交的金額是不能帶小數(shù)點(diǎn)的，且是以分為單位,這邊需要轉(zhuǎn)成字符串類(lèi)型，否則后面的簽名會(huì)失敗 data.put('refund_fee',payOutMoney);//退款總金額,訂單總金額,單位為分,只能為整數(shù) //MD5運(yùn)算生成簽名，這里是第一次簽名，用于調(diào)用統(tǒng)一下單接口 String sign = WXPayUtil.generateSignature(data, myConfig.getKey()); data.put('sign', sign); Map<String, String> rMap = wxpay.refund(data); String return_code = (String) rMap.get('return_code'); String result_code = (String) rMap.get('result_code'); Long timeStamp = System.currentTimeMillis() / 1000; if ('SUCCESS'.equals(return_code) && return_code.equals(result_code)) {ResponseBean responseBean = new ResponseBean(HttpStatus.OK.value(),'微信退款成功',rMap);return responseBean; }else{ResponseBean responseBean = new ResponseBean(HttpStatus.OK.value(),'微信退款失敗','微信支付失敗');return responseBean; } } catch (Exception e) { ResponseBean responseBean = new ResponseBean(HttpStatus.OK.value(),'微信退款失敗','微信支付失敗'); e.printStackTrace(); return responseBean; } }

需要用到的工具類(lèi)

然后在MyConfig中配置一下你們的小程序參數(shù)就行了，如果需要添加退款功能必須配置商戶(hù)證書(shū)（對(duì)應(yīng)在你項(xiàng)目中的位置）。不需要的話(huà)就把initCert方法去掉。

public class MyConfig extends WXPayConfig { @Value('${res.imgPath}') public String imgPath; private byte[] certData; @Override public String getAppID() { return '你的小程序id'; } @Override public String getMchID() { return '商戶(hù)id'; } @Override public String getKey() { return '商戶(hù)秘鑰'; } @Override public InputStream getCertStream() { ByteArrayInputStream certBis = new ByteArrayInputStream(this.certData); return certBis; } @Override public int getHttpConnectTimeoutMs() { return 8000; } @Override public int getHttpReadTimeoutMs() { return 10000; } @Override IWXPayDomain getWXPayDomain() { return new IWXPayDomain() { @Override public void report(String domain, long elapsedTimeMillis, Exception ex) { } @Override public DomainInfo getDomain(WXPayConfig config) {return new DomainInfo('api.mch.weixin.qq.com', false); } }; } @Override public void initCert() throws Exception { String certPath = this.imgPath+'/upload/cert/'+'apiclient_cert.p12';//從微信商戶(hù)平臺(tái)下載的安全證書(shū)存放的目錄 System.out.println(certPath); File file = new File(certPath); InputStream certStream = new FileInputStream(file); this.certData = new byte[(int) file.length()]; certStream.read(this.certData); certStream.close(); }}

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