这次给的任务是看一下支付宝的app支付这块。于是通过网上进行查找相关的资料，进行相关的开发，并记录下来。
通过支付宝的官网进行查看：https://docs.open.alipay.com/54/106370/
1.引入支付宝的SDK的依赖；
<dependency>
<groupId>com.alipay.sdk</groupId>
<artifactId>alipay-sdk-java</artifactId>
<version>3.7.89.ALL</version>
</dependency>
2.支付宝的参数（appid和秘钥之类），具体每个数据怎么来，可以单独查询。可以参考这个：https://blog.csdn.net/qq_35529931/article/details/104444967
并在工具类中实例化客户端
//支付宝移动端appid
public static final String ALIPAY_APP_APPID = "2016101700707603";
//支付宝商户私钥
public static final String ALIPAY_PRIVATE_KEY =
"MIIEvAIBADANBgkqhkiG9w0BAQEFAASCBKYwggSiAgEAAoIBAQCMPgVZxah9Xtgdv/jFsaJVFyyvThBy" +
"/Zw7mDfoYETefYt1amcKHITQ9mOBrHZNsA3jsMBo9fXH14w/+3VxV/wgczbiCVyXgGXSCwcATt" +
"/PhQq8CT4CHAYNhhfysgbEWCsf+piAFfYMRwNus/xFb+N2wt1PRhAvRCSqvgFPoJmgR5Iyn1sYnWNj8F0+90mlv4E" +
"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";
//支付宝公钥
public static final String ALIPAY_PUBLIC_KEY =
"MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAjD4FWcWofV7YHb" +
"/4xbGiVRcsr04Qcv2cO5g36GBE3n2LdWpnChyE0PZjgax2TbAN47DAaPX1x9eMP" +
"/t1cVf8IHM24glcl4Bl0gsHAE7fz4UKvAk+AhwGDYYX8rIGxFgrH/qYgBX2DEcDbrP8RW" +
"/jdsLdT0YQL0Qkqr4BT6CZoEeSMp9bGJ1jY/BdPvdJpb+BPg7JRddOPtMrH4zs8tq9LoSrC8V6a9hGbeR9sR" +
"+63zL4DtBIxbpb5cIugQHHO7iRi3jXgNe0GJMerQ6q7WdqKsNL+lE7pQ5ZxUVEunkHdqymELU/04S" +
"+waGJgpktWDLkO0MMuyUDV4ufuwkjuJo/QwIDAQAB";
//支付宝网关
public static final String ALIPAY_GATEWAY_URL = "https://openapi.alipaydev.com/gateway.do";
// 验证方式
public static final String SIGN_TYPE = "RSA2";
// 返回路径
public static final String ALIPAY_NOTIFYURL = "https://www.alipy.com";
// 传输方式
public static final String FORMAT = "json";
// 字符串格式
public static final String CHARSET = "UTF-8";
private static AlipayClient alipayClient = null;
public static AlipayClient getAlipayClient() throws AlipayApiException {
//实例化客户端
if (alipayClient == null) {
synchronized (AlipayUtil.class) {
if (null == alipayClient) {
alipayClient = new DefaultAlipayClient(ALIPAY_GATEWAY_URL, ALIPAY_APP_APPID, ALIPAY_PRIVATE_KEY,
FORMAT, CHARSET, ALIPAY_PUBLIC_KEY, SIGN_TYPE);
}
}
}
return alipayClient;
}
3.接下来就是下单接口，需要的参数如下：
@NotNull(message = "缺少请求参数")
private String subject;
@NotNull(message = "缺少请求参数")
private String outTradeNo;
@NotNull(message = "缺少请求参数")
private String totalAmount;
private String body;
4.下单接口：
@RequestMapping(value = "/aliPay", method = RequestMethod.POST)
public Map<String, Object> aliPayOrder(@RequestBody AlipayDTO alipayDTO) {
Map map = Maps.newHashMap();
AlipayTradeAppPayRequest request = new AlipayTradeAppPayRequest();
AlipayTradeAppPayModel model = new AlipayTradeAppPayModel();
//(否)对一笔交易的具体描述信息。如果是多种商品，请将商品描述字符串累加传给body。
model.setBody(alipayDTO.getBody());
//(是)商品的标题/交易标题/订单标题/订单关键字等
model.setSubject(alipayDTO.getSubject());
//(是)商户网站唯一订单号
model.setOutTradeNo(alipayDTO.getOutTradeNo());
//(是)订单总金额，单位为元，精确到小数点后两位
model.setTotalAmount(alipayDTO.getTotalAmount());
//(否)设置未付款支付宝交易的超时时间，一旦超时，该笔交易就会自动被关闭。
model.setTimeoutExpress("30m");
//(是)销售产品码，商家和支付宝签约的产品码，为固定值QUICK_MSECURITY_PAY
model.setProductCode("QUICK_MSECURITY_PAY");
request.setBizModel(model);
request.setNotifyUrl(AlipayUtil.ALIPAY_NOTIFYURL);
try {
//这里和普通的接口调用不同，使用的是sdkExecute
AlipayTradeAppPayResponse responseStr = AlipayUtil.getAlipayClient().sdkExecute(request);
//可以直接给客户端请求，无需再做处理。
map.put("msg", responseStr.getBody());
} catch (AlipayApiException e) {
log.info("AliPayOrder exception={}", e);
}
return map;
}
5.支付回调
@RequestMapping(value = "/aliPayNotify", method = RequestMethod.POST)
public String aliPayNotify(HttpServletRequest request) {
Map<String, String> params = Maps.newHashMap();
try {
//获取支付宝POST过来反馈信息
Map requestParams = request.getParameterMap();
for (Iterator iter = requestParams.keySet().iterator(); iter.hasNext(); ) {
String name = (String) iter.next();
String[] values = (String[]) requestParams.get(name);
String valueStr = "";
for (int i = 0; i < values.length; i++) {
valueStr = (i == values.length - 1) ? valueStr + values[i]
: valueStr + values[i] + ",";
}
//乱码解决，这段代码在出现乱码时使用。
valueStr = new String(valueStr.getBytes("ISO-8859-1"), "utf-8");
params.put(name, valueStr);
}
//调用SDK验证签名
boolean flag = AlipaySignature.rsaCheckV1(params, AlipayUtil.ALIPAY_PUBLIC_KEY, AlipayUtil.CHARSET,
AlipayUtil.SIGN_TYPE);
if (flag) { // 验证成功
return "success";
}
} catch (Exception e) {
log.info("aliPayNotify exception={}", e);
return "fail";
}
return "fail";
}
6.退款需要的参数类：
@NotNull(message = "缺少请求参数")
public BigDecimal refundAmount;
@NotNull(message = "缺少请求参数")
public String outTrandeNo;
@NotNull(message = "缺少请求参数")
public String tradeNo;
private String refundReason;
7.退款接口
/**
* 功能描述 退款申请
*
* @param reFundDTO
* @return Map<String,Object>
*/
@RequestMapping(value = "/aliPayRefund", method = RequestMethod.POST)
public Map<String, Object> aliPayRefund(@Valid @RequestBody ReFundDTO reFundDTO) {
Map map = Maps.newHashMap();
AlipayTradeRefundRequest request = new AlipayTradeRefundRequest();
AlipayTradeRefundModel model = new AlipayTradeRefundModel();
// 退款金额
model.setRefundAmount(String.valueOf(reFundDTO.getRefundAmount()));
// 支付宝交易号
model.setTradeNo(reFundDTO.getTradeNo());
// 订单支付时传入的商户订单号
model.setOutTradeNo(reFundDTO.getOutTrandeNo());
if (StringUtils.isNotBlank(reFundDTO.getRefundReason())) {
// 退款原因
model.setRefundReason(reFundDTO.getRefundReason());
}
request.setBizModel(model);
try {
AlipayTradeRefundResponse response = AlipayUtil.getAlipayClient().execute(request);
map.put("response", URLDecoder.decode(response.getBody()));
return map;
} catch (AlipayApiException e) {
log.info("aliPayRefund exception={}", e);
e.printStackTrace();
}
return map;
}
8.开发环境仅仅可以测试一下下单接口，如下图。
代码的地址如下：
https://github.com/virtuousOne/pay