前言：最近開發(fā)支付寶支付功能，總結(jié)一下做個(gè)分享

官方文檔：https://opendocs.alipay.com/apis支付寶沙箱地址： https://openhome.alipay.com/platform/appDaily.htm?tab=info支付寶支付流程：

準(zhǔn)備工作：獲取支付寶沙箱數(shù)據(jù)（APPID，支付寶網(wǎng)關(guān)，RSA2秘，沙箱支付賬號(hào)等）集成SpringBoot，使用Java代碼發(fā)起支付請(qǐng)求支付寶收到支付請(qǐng)求后，返回HTML代碼片段，用于前端展示二維碼掃碼支付成功后，支付寶發(fā)送同步、異步通知請(qǐng)求，同步、異步通知路徑可在配置文件中進(jìn)行配置收到異步通知結(jié)果后，進(jìn)行驗(yàn)簽，驗(yàn)簽通過，返回成功信息通知支付寶不在進(jìn)行異步通知此時(shí)支付寶支付流程完成，調(diào)用支付寶查詢接口，確認(rèn)支付成功

打開上述沙箱地址，獲取沙箱配置，查看下圖信息

1、在pom.xml文件添加支付寶依賴

<!-- 支付寶支付 --><dependency><groupId>com.alipay.sdk</groupId><artifactId>alipay-sdk-java</artifactId><version>3.7.26.ALL</version></dependency>

2、在項(xiàng)目中新建一個(gè)支付寶工具類

public class AlipayConfig {// ↓↓↓↓↓↓↓↓↓↓請(qǐng)?jiān)谶@里配置您的基本信息↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓// 應(yīng)用ID,您的APPID，收款賬號(hào)既是您的APPID對(duì)應(yīng)支付寶賬號(hào)public static String app_id = '';// 商戶私鑰，您的PKCS8格式RSA2私鑰public static String merchant_private_key = '';// 支付寶公鑰,查看地址：https://openhome.alipay.com/platform/keyManage.htm 對(duì)應(yīng)APPID下的支付寶公鑰。public static String alipay_public_key = '';// 服務(wù)器異步通知頁面路徑 需http://格式的完整路徑，不能加?id=123這類自定義參數(shù)，必須外網(wǎng)可以正常訪問// 這里需要配置支付寶回調(diào)的后端路徑，必須要外網(wǎng)可以訪問public static String notify_url = 'http://localhost:8080/alipay.trade.page.pay-JAVA-UTF-8/notify_url.jsp'; // 頁面跳轉(zhuǎn)同步通知頁面路徑 需http://格式的完整路徑，不能加?id=123這類自定義參數(shù)，必須外網(wǎng)可以正常訪問// TODO 這里需要配置支付寶回調(diào)的前端路徑，必須要外網(wǎng)可以訪問public static String return_url = 'http://localhost:8080/alipay.trade.page.pay-JAVA-UTF-8/return_url.jsp';// 簽名方式public static String sign_type = 'RSA2';// 字符編碼格式public static String charset = 'UTF-8';// 支付寶網(wǎng)關(guān)public static String gatewayUrl = 'https://openapi.alipaydev.com/gateway.do';// 日志路徑public static String log_path = 'C:';// ↑↑↑↑↑↑↑↑↑↑請(qǐng)?jiān)谶@里配置您的基本信息↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑/** * 寫日志，方便測(cè)試（看網(wǎng)站需求，也可以改成把記錄存入數(shù)據(jù)庫） * * @param sWord 要寫入日志里的文本內(nèi)容 */public static void logResult(String sWord) {FileWriter writer = null;try {writer = new FileWriter(log_path + 'alipay_log_' + System.currentTimeMillis() + '.txt');writer.write(sWord);} catch (Exception e) {e.printStackTrace();} finally {if (writer != null) {try {writer.close();} catch (IOException e) {e.printStackTrace();}}}}}

3、定義Service

public interface AlipayService { /** * 發(fā)起支付 * @param outTradeNo 訂單編號(hào)（唯一） * @param totalAmount 訂單價(jià)格 * @param subject 商品名稱 */ String goPay(String outTradeNo,BigDecimal totalAmount,String subject) throws Exception; /** * 交易查詢 * @param outTradeNo 訂單編號(hào)（唯一） */ String query(String outTradeNo) throws AlipayApiException; /** * 交易關(guān)閉 * @param outTradeNo訂單編號(hào)（唯一） */ String close(String outTradeNo) throws AlipayApiException;}

4、實(shí)現(xiàn)ServiceImpl，發(fā)起支付請(qǐng)求，交易查詢等

public class AlipayServiceImpl implements AlipayService {@Autowiredprivate RechargeDetailService rechargeDetailService;@Overridepublic String goPay(String outTradeNo, BigDecimal totalAmount, String subject) throws Exception {AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl, AlipayConfig.app_id,AlipayConfig.merchant_private_key, 'json', AlipayConfig.charset, AlipayConfig.alipay_public_key,AlipayConfig.sign_type);AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();/** 同步通知，支付完成后，支付成功頁面 */alipayRequest.setReturnUrl(AlipayConfig.return_url);/** 異步通知，支付完成后，需要進(jìn)行的異步處理 */alipayRequest.setNotifyUrl(AlipayConfig.notify_url);alipayRequest.setBizContent('{'out_trade_no':'' + outTradeNo + '',' + ''total_amount':'' + totalAmount+ '',' + ''subject':'' + subject + '',' + ''body':'付款',' + ''timeout_express':'15m','+ ''product_code':'FAST_INSTANT_TRADE_PAY'}');/** 轉(zhuǎn)換格式 */String form = '';form = alipayClient.pageExecute(alipayRequest).getBody();return form;}@Overridepublic String query(String outTradeNo) throws AlipayApiException {AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl, AlipayConfig.app_id,AlipayConfig.merchant_private_key, 'json', AlipayConfig.charset, AlipayConfig.alipay_public_key,AlipayConfig.sign_type);AlipayTradeQueryRequest alipayRequest = new AlipayTradeQueryRequest();/** 請(qǐng)求接口 */alipayRequest.setBizContent('{'out_trade_no':'' + outTradeNo + '',' + ''trade_no':'' + '' + ''}');/** 轉(zhuǎn)換格式 */String result = alipayClient.execute(alipayRequest).getBody();return result;}@Overridepublic String close(String outTradeNo) throws AlipayApiException {AlipayTradeCloseRequest alipayRequest = new AlipayTradeCloseRequest();AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl, AlipayConfig.app_id,AlipayConfig.merchant_private_key, 'json', AlipayConfig.charset, AlipayConfig.alipay_public_key,AlipayConfig.sign_type);alipayRequest.setBizContent('{'out_trade_no':'' + outTradeNo + '',' + ''trade_no':'' + '' + ''}');String result = alipayClient.execute(alipayRequest).getBody();return result;}}

5、創(chuàng)建支付寶controller

public class AlipayController { @Autowired private AlipayService alipayService; /** * 訂單支付 */ @GetMapping('goPay') public Map<Object, Object> goPay() throws Exception{ /** 模仿數(shù)據(jù)庫，從后臺(tái)調(diào)數(shù)據(jù)*/ String outTradeNo = '202101010001'; BigDecimaltotalAmount = new BigDecimal(10000); String subject = '蘋果12';String pay = alipayService.goPay(outTradeNo, totalAmount, subject);Map<Object, Object> pays = new HashMap<>(); pays.put('pay', pay);return pays; } /** * 交易查詢 */ @PostMapping('aipayQuery') public Result<Object> alipayQuery() throws Exception{ /**調(diào)取支付訂單號(hào)*/ String outTradeNo = '13123';String query = alipayService.query(outTradeNo);Object json = JSONObject.toJSON(query);/*JSONObject jObject = new JSONObject(); jObject.get(query);*/ return Result.success(json); } /** * 交易關(guān)閉 * @throws AlipayApiException */ @PostMapping('alipayclose') public Result<Object> alipaycolse() throws AlipayApiException{/** 調(diào)取數(shù)據(jù)*/ String outTradeNo = '13123';String close = alipayService.close(outTradeNo);return Result.success(close); } /** * 異步通知支付結(jié)果 * * @param request * @return String * @throws AlipayApiException * @throws ParseException */@PostMapping('/callBack')public String alipayNotify(HttpServletRequest request) throws Exception {// 獲取支付寶的請(qǐng)求信息Map<String, String> map = new HashMap<>();Map<String, String[]> requestParams = request.getParameterMap();if(requestParams.isEmpty()) {return 'failure';}// 將 Map<String,String[]> 轉(zhuǎn)為 Map<String,String>for (Iterator<String> iter = requestParams.keySet().iterator(); iter.hasNext();) {String name = iter.next();String[] values = requestParams.get(name);String valueStr = '';for (int i = 0; i < values.length; i++) {valueStr = (i == values.length - 1) ? valueStr + values[i] : valueStr + values[i] + ',';}map.put(name, valueStr);}// 驗(yàn)簽boolean signVerified = AlipaySignature.rsaCheckV1(map, AlipayConfig.alipay_public_key, AlipayConfig.charset,AlipayConfig.sign_type);// 驗(yàn)簽通過if (signVerified) {//支付成功后進(jìn)行操作}return 'failure';}}

到此SpringBoot整合支付寶掃碼支付，就完成了

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