springboot 整合支付宝支付（沙箱）
// 这里必须加@ResponseBody注解，让当前方法的返回值成为响应体，在浏览器界面上显示支付宝支付界面
@ResponseBody
@RequestMapping("/generate/order")
public String generateOrder(HttpSession session, OrderVO orderVO) throws AlipayApiException {
// 1.从Session域获取orderProjectVO对象
OrderProjectVO orderProjectVO = (OrderProjectVO) session.getAttribute("orderProjectVO");
// 2.将orderProjectVO对象和orderVO对象组装到一起
orderVO.setOrderProjectVO(orderProjectVO);
// 3.生成订单号并设置到orderVO对象中
// ①根据当前日期时间生成字符串
String time = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date());
// ②使用UUID生成用户ID部分
String user = UUID.randomUUID().toString().replace("-", "").toUpperCase();
// ③组装
String orderNum = time + user;
// ④设置到OrderVO对象中
orderVO.setOrderNum(orderNum);
// 4.计算订单总金额并设置到orderVO对象中
Double orderAmount = (double) (orderProjectVO.getSupportPrice() * orderProjectVO.getReturnCount() + orderProjectVO.getFreight());
orderVO.setOrderAmount(orderAmount);
// ※将OrderVO对象存入Session域
session.setAttribute("orderVO", orderVO);
// 5.调用专门封装好的方法给支付宝接口发送请求
return sendRequestToAliPay(orderNum, orderAmount, orderProjectVO.getProjectName(), orderProjectVO.getReturnContent());
}
/**
* 返回支付宝支付页面
* @param outTradeNum 订单号
* @param totalAmount 总金额
* @param subject 商品名称
* @param body 商品描述
* @return 返回支付页面
* @throws AlipayApiException
*/
private String sendRequestToAliPay(String outTradeNum,Double totalAmount,String subject,String body) throws AlipayApiException {
//获得初始化的AlipayClient
AlipayClient alipayClient = new DefaultAlipayClient(alipayProperties.gatewayUrl, alipayProperties.appId, alipayProperties.merchantPrivateKey, "json", alipayProperties.charset, alipayProperties.alipayPublicKey, alipayProperties.signType);
//设置请求参数
AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
alipayRequest.setReturnUrl(alipayProperties.returnUrl);
alipayRequest.setNotifyUrl(alipayProperties.notifyUrl);
//商户订单号，商户网站订单系统中唯一订单号，必填
// String out_trade_no = new String(("WIDout_trade_no").getBytes("ISO-8859-1"),"UTF-8");
//付款金额，必填
// String total_amount = new String(("WIDtotal_amount").getBytes("ISO-8859-1"),"UTF-8");
//订单名称，必填
// String subject = new String(("WIDsubject").getBytes("ISO-8859-1"),"UTF-8");
//商品描述，可空
// String body = new String(("WIDbody").getBytes("ISO-8859-1"),"UTF-8");
alipayRequest.setBizContent("{\"out_trade_no\":\""+ outTradeNum +"\","
+ "\"total_amount\":\""+ totalAmount +"\","
+ "\"subject\":\""+ subject +"\","
+ "\"body\":\""+ body +"\","
+ "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");
//若想给BizContent增加其他可选请求参数，以增加自定义超时时间参数timeout_express来举例说明
//("{\"out_trade_no\":\""+ out_trade_no +"\","
// + "\"total_amount\":\""+ total_amount +"\","
// + "\"subject\":\""+ subject +"\","
// + "\"body\":\""+ body +"\","
// + "\"timeout_express\":\"10m\","
// + "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");
//请求参数可查阅【电脑网站支付的API文档--请求参数】章节
//请求
// String result = (alipayRequest).getBody();
// 返回页面
return alipayClient.pageExecute(alipayRequest).getBody();
// //输出
// (result);
}