Java - 支付宝支付

港控/mmm° 2023-02-19 04:28 31阅读 0赞

### 一. APP支付 ###

APP支付适用于商家在 App 应用中集成支付宝支付功能。 商家APP调用支付宝提供的 SDK，SDK 再调用支付宝APP内的支付模块。如果用户已安装支付宝 APP，商家 APP 会跳转到支付宝中完成支付，支付完后跳回到商家APP内，最后展示支付结果。如果用户没有安装支付宝 APP，商家 APP 内会调起支付宝网页支付收银台，用户登录支付宝账户，支付完后展示支付结果。 目前支持手机系统有：iOS（苹果）、Android（安卓）。

**【用户已安装支付宝支付流程】**

◆ 用户在商家 App 中选择商品下单、确认购买，进入支付环节，选择支付宝，用户点击确认支付，如图1

◆ 进入到支付宝页面，调起支付宝支付，出现确认支付界面，如图2

◆ 用户确认收款方和金额，点击立即支付后出现输入密码界面，如图3

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0FraXJhTmlja3k_size_16_color_FFFFFF_t_70][]

◆ 输入正确密码后，支付宝端显示支付结果，如图 4； 5自动回跳到商家 App 中，商家根据付款结果个性化展示订单处理结果，如图 5。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0FraXJhTmlja3k_size_16_color_FFFFFF_t_70 1][]

**【用户未安装支付宝支付流程】**

◆ 用户在商家 App 中选择商品下单、确认购买，进入支付环节，选择支付宝，用户点击确认支付，如图 6；

◆ 用户未安装支付宝客户端，则调起支付宝网页支付收银台，用户登录支付宝账户，如图 7；

◆ 登录成功后，进入确认付款页面，如图 8；

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0FraXJhTmlja3k_size_16_color_FFFFFF_t_70 2][]

◆ 用户点击确认付款，进入支付密码页面，如下图 9； 5.用户输入密码，完成支付，展示支付结果，如图 10

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0FraXJhTmlja3k_size_16_color_FFFFFF_t_70 3][]

**【接入前准备】**

参考官网：[https://opendocs.alipay.com/open/204/105297][https_opendocs.alipay.com_open_204_105297]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0FraXJhTmlja3k_size_16_color_FFFFFF_t_70 4][]

**【Alipay通用工具类】**

import java.net.URLEncoder;
    import java.util.ArrayList;
    import java.util.Collections;
    import java.util.Date;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    
    import com.alibaba.fastjson.JSON;
    import com.alipay.api.*;
    import com.alipay.api.internal.util.AlipaySignature;
    import com.alipay.api.request.AlipayFundTransOrderQueryRequest;
    import com.alipay.api.request.AlipayFundTransToaccountTransferRequest;
    import com.alipay.api.request.AlipayFundTransUniTransferRequest;
    import com.alipay.api.request.AlipayTradeRefundRequest;
    import com.alipay.api.response.AlipayFundTransOrderQueryResponse;
    import com.alipay.api.response.AlipayFundTransToaccountTransferResponse;
    import com.alipay.api.response.AlipayFundTransUniTransferResponse;
    import com.alipay.api.response.AlipayTradeRefundResponse;
    import com.maiji.cloud.request.shopingmall.AlipayRefundReqData;
    import com.maiji.cloud.request.shopingmall.AlipayRefundReqData.RefundReqInner;
    import org.apache.commons.lang.StringUtils;
    
    public class AlipayUtil {
    
        public static final String APP_ID = "";
        // 支付宝支付私钥
        public static final String PRIVATE_KEY = "";
        // 支付宝支付公钥
        public static final String PUBLIC_KEY = "";
        // 支付成功回调url
        public static final String NOTIFY_URL = "";
    	
        public static String createSign(Map parameters) throws Exception {
    
            List<String> keys = new ArrayList<String>(parameters.keySet());
            Collections.sort(keys);
            String prestr = "";
            for (int i = 0; i < keys.size(); i++) {
            String key = keys.get(i);
            Object value = parameters.get(key);
    //        value = URLEncoder.encode(value, "UTF-8");
            if(StringUtils.isNotBlank(parameters.get(key)+"") && value != null) {
            	if (i == keys.size() - 1) {//拼接时，不包括最后一个&字符
                    prestr = prestr + key + "=" + value;
                } else {
                    prestr = prestr + key + "=" + value + "&";
                }	
            }
            }
            return prestr;
        }
    	
        public static String createSignValues(Map parameters) throws Exception {
    
            List<String> keys = new ArrayList<String>(parameters.keySet());
            Collections.sort(keys);
            String prestr = "";
            for (int i = 0; i < keys.size(); i++) {
            String key = keys.get(i);
            Object value = parameters.get(key);
            if(StringUtils.isNotBlank(parameters.get(key)+"") && value != null) {
            	value = URLEncoder.encode(value+"", "UTF-8");
            	if (i == keys.size() - 1) {//拼接时，不包括最后一个&字符
                    prestr = prestr + key + "=" + value;
                } else {
                    prestr = prestr + key + "=" + value + "&";
                }	
            }
            }
            return prestr;
        }
    
        public static AlipayFundTransToaccountTransferResponse alipayWithdraw(String ioUuid,String realName,String account,Double amount) throws AlipayApiException{
        	 Map<String, Object> map = new HashMap<String, Object>();
             map.put("out_biz_no", ioUuid);
             map.put("payee_type", "ALIPAY_LOGONID");
             map.put("payee_account", account);
             map.put("payee_real_name", realName);
             map.put("amount", amount);
             map.put("remark", "提现");
             
             AlipayClient alipayClient = new DefaultAlipayClient ("https://openapi.alipay.com/gateway.do", AlipayUtil.APP_ID,
                     AlipayUtil.PRIVATE_KEY, "json", "utf-8",  AlipayUtil.PUBLIC_KEY,"RSA2");
             AlipayFundTransToaccountTransferRequest request = new AlipayFundTransToaccountTransferRequest();
             
             request.setBizContent(JSON.toJSONString(map));
             AlipayFundTransToaccountTransferResponse response = alipayClient.execute(request);
        	return response;
        	
        }
        
        public static AlipayTradeRefundResponse alipayRefund(String orderNo,String payId, Double refundMoney) throws Exception {
            String nowTime = TimeUtil.date2String(new Date(), null);
            AlipayRefundReqData aliPayResData = new AlipayRefundReqData();
            aliPayResData.setApp_id(AlipayUtil.APP_ID);
            aliPayResData.setCharset("utf-8");
            aliPayResData.setMethod("alipay.trade.refund");
            aliPayResData.setSign_type("RSA2");
            aliPayResData.setTimestamp(nowTime);
            aliPayResData.setVersion("1.0");
            RefundReqInner aliPayResInner = aliPayResData.dataInstance();
            aliPayResInner.setOut_trade_no(orderNo);
            aliPayResInner.setRefund_amount(refundMoney);
            aliPayResInner.setTrade_no(payId);
            aliPayResInner.setOut_request_no(orderNo);
            Map paramMap = WXUtil.objectToMap(aliPayResData);
            paramMap.remove("biz_content");
            paramMap.put("biz_content", JSON.toJSON(aliPayResInner));
    
            String signString = AlipayUtil.createSign(paramMap);
            String sign = AlipaySignature.rsaSign(signString, AlipayUtil.PRIVATE_KEY, "utf-8", "RSA2");
            aliPayResData.setSign(sign);
            paramMap.put("sign", sign);
            AlipayClient alipayClient = new DefaultAlipayClient	("https://openapi.alipay.com/gateway.do",
                AlipayUtil.APP_ID,AlipayUtil.PRIVATE_KEY,"json","utf-8",AlipayUtil.PUBLIC_KEY,"RSA2");
            AlipayTradeRefundRequest request = new AlipayTradeRefundRequest();
            request.setBizContent( JSON.toJSONString(aliPayResInner));
            AlipayTradeRefundResponse response = alipayClient.execute(request);
            if (!"Y".equals(response.getFundChange())) {
                throw new Exception("调用退款接口退款未成功");
            }
    
            return response;
        }
    
    }

**【app支付接口2.0】**

@NoArgsConstructor
    @Data
    @Accessors(chain = true)
    public class AlipayDto{
    
        @ApiModelProperty(value="总金额")
        private double totalMoney;
    	       
        @ApiModelProperty(value="订单号")
        private String out_trade_no;
    
    }

@PostMapping("alipay")
    public BaseDataResDto<AlipayTradeAppPayResponse> alipay(@RequestBody AlipayDto param, @RequestHeader("token") String token) throws Exception {
    
        return capitalMainLogService.alipay(param, token);
    }

@Override
    public BaseDataResDto<AlipayTradeAppPayResponse> alipay(AlipayDto param, String token) throws Exception {
    
        // 实例化客户端
        AlipayClient alipayClient = new DefaultAlipayClient("https://openapi.alipay.com/gateway.do", AlipayUtil.APP_ID,
                    AlipayUtil.PRIVATE_KEY, "json", "utf-8", AlipayUtil.PUBLIC_KEY, "RSA2");
    
        // 实例化具体API对应的request类,类名称和接口名称对应,当前调用接口名称：alipay.trade.app.pay
        AlipayTradeAppPayRequest request = new AlipayTradeAppPayRequest();
    
        // SDK已经封装掉了公共参数，这里只需要传入业务参数。以下方法为sdk的model入参方式(model和biz_content同时存在的情况下取biz_content)。
        AlipayTradeAppPayModel model = new AlipayTradeAppPayModel();
        model.setSubject("商品支付");
        model.setBody("购买商品-请尽快付款");
        model.setOutTradeNo(param.getOut_trade_no());
        model.setTotalAmount(param.getTotalMoney() + "");
        model.setProductCode("QUICK_MSECURITY_PAY");
    
        request.setBizModel(model);
        request.setNotifyUrl(AlipayUtil.NOTIFY_URL);
    
        AlipayTradeAppPayResponse response = alipayClient.sdkExecute(request);
        if(response.isSuccess()){
            return new BaseDataResDto(Status.SUCCESS).setData(response);
        }
        return new BaseDataResDto(Status.ERROR);
    }

![20200619105941495.png][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0FraXJhTmlja3k_size_16_color_FFFFFF_t_70 5][]

**【支付宝支付成功回调】**

对于App支付产生的交易，支付宝会根据原始支付 API 中传入的异步通知地址 notify\_url，通过 POST 请求的形式将支付结果作为参数通知到商户系统，详见官方文档：[https://opendocs.alipay.com/open/204/105301][https_opendocs.alipay.com_open_204_105301]

@PostMapping("alipayCallBack")
    public String alipayCallBack(HttpServletRequest request) {
        Map<String, String> parameters = new HashMap<>();
        Map<String, String[]> requestParams = request.getParameterMap();
        for (Map.Entry<String, String[]> entry : requestParams.entrySet()) {
            String key = entry.getKey();
            String[] values = entry.getValue();
            String valueStr = "";
            for (int i = 0; i < values.length; i++) {
                valueStr = (i == values.length - 1) ? valueStr + values[i] : valueStr + values[i] + ",";
            }
            // valueStr = new String(valueStr.getBytes("ISO-8859-1"), "utf-8"); 这段代码在出现乱码时使用
            parameters.put(key, valueStr);
        }
        return capitalMainLogService.alipayCallBack(parameters);
    }

@Override
    public String alipayCallBack(Map<String, String> param) throws AlipayApiException{
    
        boolean signVerified = AlipaySignature.rsaCheckV1(param, AlipayUtil.PUBLIC_KEY, param.get("charset"), param.get("sign_type")); // 调用SDK验证签名
    
        if (!signVerified)  return "failure";
    
        ShopingOrder shopingOrder = orderDao.getByOrderNo(param.get("out_trade_no"));
    
        // 已经付款
        if (Arrays.asList(1, 2, 3, 5, 6).contains(shopingOrder.getStatus())) {
            return "success";
        }
    
        // 判断金额是否一致
        if(!StringUtils.equals(shopingOrder.getAmount(), param.get("total_amount"))){
            return "failure"
        }
    
        if ("TRADE_SUCCESS".equals( param.get("trade_status"))) {
            // 具体业务逻辑，如修改订单状态，流水记录，积分等...
    
        }
    
        return "success";
    }

**【查询订单】**

该接口提供所有支付宝支付订单的查询，商户可以通过该接口主动查询订单状态，完成下一步的业务逻辑。 需要调用查询接口的情况： 当商户后台、网络、服务器等出现异常，商户系统最终未接收到支付通知； 调用支付接口后，返回系统错误或未知交易状态情况； 调用alipay.trade.pay，返回INPROCESS的状态； 调用alipay.trade.cancel之前，需确认支付状态。

@RestController
    public class AlipayController {
    
        @PostMapping("/alipayOrderQuery")
        public BaseDataResDto<Map<String, Object>> alipayOrderQuery(@RequestBody BaseReqDto<String> baseReqDto){
            String out_trade_no = baseReqDto.getData(); // 商户订单号
            // 订单支付时传入的商户订单号,和支付宝交易号不能同时为空，trade_no,out_trade_no如果同时存在优先取trade_no
    
            AlipayClient alipayClient = new DefaultAlipayClient("https://openapi.alipay.com/gateway.do",
                    AlipayUtil.APP_ID, AlipayUtil.PRIVATE_KEY, "json", "utf-8", AlipayUtil.PUBLIC_KEY, "RSA2");
    
            AlipayTradeQueryRequest request = new AlipayTradeQueryRequest();
            request.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\","
                    +"\"trade_no\":\""+ "" +"\"}");
            try{
                AlipayTradeQueryResponse response = alipayClient.execute(request);
                if(response.isSuccess()){
                    return new BaseDataResDto(Status.SUCCESS).setData(response);
                }
            } catch (AlipayApiException e) {
                e.printStackTrace();
            }
            return new BaseDataResDto(Status.ERROR);
        }
    
    }

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0FraXJhTmlja3k_size_16_color_FFFFFF_t_70 6][]

**【退款】**

当交易发生之后一段时间内，由于买家或者卖家的原因需要退款时，卖家可以通过退款接口将支付款退还给买家，支付宝将在收到退款请求并且验证成功之后，按照退款规则将支付款按原路退到买家帐号上。 交易超过约定时间（签约时设置的可退款时间）的订单无法进行退款 支付宝退款支持单笔交易分多次退款，多次退款需要提交原支付订单的商户订单号和设置不同的退款单号。一笔退款失败后重新提交，要采用原来的退款单号。总退款金额不能超过用户实际支付金额。

这里的交易退款接口是指统一收单交易退款接口（[alipay.trade.refund][]），统一收单交易退款接口本身接口不支持设置notify\_url参数，因此退款导致触发的异步通知是发送到支付接口中设置的notify\_url。

交易退款接口是否会触发异步通知：[https://opensupport.alipay.com/support/helpcenter/193/201602484851][https_opensupport.alipay.com_support_helpcenter_193_201602484851]

@Override
    public BaseResDto executeRefund(String orderRefundId) throws Exception{
     
        ShoppingOrderRefundEntity shoppingOrderRefund = shopingOrderRefundService.selectById(orderRefundId).setRefundMiddleTime(new Date()).setStatus(3);//退款中
        String orderId = shoppingOrderRefund.getOrderId();
        ShopingOrder shopingOrder = shopingOrderMapper.selectById(orderId)         .setRefundStatus(3);//退款中
        Double refundMoney = shoppingOrderRefund.getRefundMoney();
        Double amount = shopingOrder.getAmount();
        if (refundManey > amount) 
            return BaseResDto.baseResDto(Status.ERROR, "退款金额错误！");
    
        AlipayTradeRefundResponse response = AlipayUtil.alipayRefund(shopingOrder.getOrderNo(), shopingOrder.getPayId(), refundManey);
        if(response.isSuccess()){
            return new BaseDataResDto(Status.SUCCESS).setData(response);
        }
     
        // 下面接入自己的业务逻辑...
    
     
        return new BaseResDto(Status.SUCCESS);       
    }

**【查询退款结果】**

官方文档：[https://opendocs.alipay.com/apis/api\_1/alipay.trade.fastpay.refund.query][https_opendocs.alipay.com_apis_api_1_alipay.trade.fastpay.refund.query]

@RestController
    public class AliPayController {
    
        @PostMapping("/alipayRefundQuery")
        public BaseDataResDto<Map<String,Object>> alipayRefundQuery(@RequestBody Map<String,Object> param){
    
            Object outTradeNo = param.get("outTradeNo");
            Object outRequestNo = param.get("outRequestNo");
    
    
            AlipayClient alipayClient = new DefaultAlipayClient("https://openapi.alipay.com/gateway.do",
                    AlipayUtil.APP_ID, AlipayUtil.PRIVATE_KEY, "json", "utf-8", AlipayUtil.PUBLIC_KEY, "RSA2");
    
            AlipayTradeFastpayRefundQueryRequest request = new AlipayTradeFastpayRefundQueryRequest();
            request.setBizContent("{\"out_trade_no\":\""+ outTradeNo +"\","
                    +"\"out_request_no\":\""+ outRequestNo +"\"}");
            try{
                AlipayTradeFastpayRefundQueryResponse response = alipayClient.execute(request);
                if(response.isSuccess()){
                    return new BaseDataResDto(Status.SUCCESS).setData(response);
                }
            } catch (AlipayApiException e){
                e.printStackTrace();
            }
            return new BaseDataResDto(Status.ERROR);
        }
    
    }

![20200620102351402.png][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0FraXJhTmlja3k_size_16_color_FFFFFF_t_70 7][]

**【转到到支付宝账户】（提现）**

官方文档：[https://opendocs.alipay.com/apis/api\_28/alipay.fund.trans.uni.transfer][https_opendocs.alipay.com_apis_api_28_alipay.fund.trans.uni.transfer]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0FraXJhTmlja3k_size_16_color_FFFFFF_t_70 8][]

public static AlipayFundTransToaccountTransferResponse alipayWithdraw(String orderNo,String realName,String account,Double amount) throws AlipayApiException{
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("out_biz_no", orderNo);
        map.put("payee_type", "ALIPAY_LOGONID");
        map.put("payee_account", account);
        map.put("payee_real_name", realName);
        map.put("amount", amount);
        map.put("remark", "提现");
             
        AlipayClient alipayClient = new DefaultAlipayClient ("https://openapi.alipay.com/gateway.do", AlipayUtil.APP_ID,
                     AlipayUtil.PRIVATE_KEY, "json", "utf-8",  AlipayUtil.PUBLIC_KEY,"RSA2");
             AlipayFundTransToaccountTransferRequest request = new AlipayFundTransToaccountTransferRequest();
             
        request.setBizContent(JSON.toJSONString(map));
        AlipayFundTransToaccountTransferResponse response = alipayClient.execute(request);
        return response;
        	
    }

public static void main (String[] args) throws Exception {
        
        AlipayFundTransToaccountTransferResponse response = AlipayUtil.alipayWithdraw(UUID_MD5.getUUID(), "姓名", "手机号码",0.1 );
        System.out.println(JSON.toJSONString(response));
        if(response.isSuccess()){
            System.out.println("调用成功");
        } else {
            System.out.println("调用失败");
        }
    }

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0FraXJhTmlja3k_size_16_color_FFFFFF_t_70 9][]

### 二. 电脑网站支付 ###

@RestController
    public class AlipayPC {
    
        AlipayClient alipayClient = new DefaultAlipayClient("https://openapi.alipay.com/gateway.do",
                AlipayUtil.APP_ID,AlipayUtil.PRIVATE_KEY,"json","utf-8",AlipayUtil.PUBLIC_KEY,"RSA2");
    
        @PostMapping("/alipayPC")
        public String alipayPC() throws Exception{
    
            AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
            /** 同步通知，支付完成后，支付成功页面*/
            alipayRequest.setReturnUrl("自定义");
            /** 异步通知，支付完成后，需要进行的异步处理*/
            alipayRequest.setNotifyUrl(AlipayUtil.NOTIFY_URL);
    
            String subject = "测试付款";
    
            alipayRequest.setBizContent("{\"out_trade_no\":\""+ 1234567 +"\","
                    + "\"total_amount\":\""+ 0.1 +"\","
                    + "\"subject\":\""+ subject +"\","
                    + "\"body\":\""+ "商品费用，请尽快付款" +"\","
                    + "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");
    
            /**转换格式 （这里生成一个表单，会自动提交） */
            return alipayClient.pageExecute(alipayRequest).getBody().replace('\"','\'').replace('\n',' ');
        }
    
    }

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0FraXJhTmlja3k_size_16_color_FFFFFF_t_70 10][]

将接口的form表单返给前端，前端直接新开一个页面即可跳到支付宝网关支付页面 ~

电脑网站支付，手机网站支付，APP支付，三种支付方式的查询订单，退款，查询退款等的API是一致的，没什么特殊情况，支付成功回调也是一致的，完全可以配成一个异步回调 ~

最后附上支付宝沙箱环境的链接：[https://opendocs.alipay.com/open/200/105311][https_opendocs.alipay.com_open_200_105311]

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[https_opendocs.alipay.com_open_204_105297]: https://opendocs.alipay.com/open/204/105297
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[20200619105941495.png]: https://img-blog.csdnimg.cn/20200619105941495.png
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[https_opendocs.alipay.com_open_204_105301]: https://opendocs.alipay.com/open/204/105301
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[alipay.trade.refund]: https://docs.open.alipay.com/api_1/alipay.trade.refund
[https_opensupport.alipay.com_support_helpcenter_193_201602484851]: https://opensupport.alipay.com/support/helpcenter/193/201602484851
[https_opendocs.alipay.com_apis_api_1_alipay.trade.fastpay.refund.query]: https://opendocs.alipay.com/apis/api_1/alipay.trade.fastpay.refund.query
[20200620102351402.png]: https://img-blog.csdnimg.cn/20200620102351402.png
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[https_opendocs.alipay.com_apis_api_28_alipay.fund.trans.uni.transfer]: https://opendocs.alipay.com/apis/api_28/alipay.fund.trans.uni.transfer/
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[https_opendocs.alipay.com_open_200_105311]: https://opendocs.alipay.com/open/200/105311