Java中Spring Boot支付宝扫码支付及支付回调的实现代码

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

public class AlipayConfig {
	// ↓↓↓↓↓↓↓↓↓↓请在这里配置您的基本信息↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓

	// 应用ID,您的APPID，收款账号既是您的APPID对应支付宝账号
	public static String app_id = "";

	// 商户私钥，您的PKCS8格式RSA2私钥
	public static String merchant_private_key = "";

	// 支付宝公钥,查看地址：https://openhome.alipay.com/platform/keyManage.htm 对应APPID下的支付宝公钥。
	public static String alipay_public_key = "";

	// 服务器异步通知页面路径 需http://格式的完整路径，不能加?id=123这类自定义参数，必须外网可以正常访问
	
	// 这里需要配置支付宝回调的后端路径，必须要外网可以访问
	public static String notify_url = "http://localhost:8080/alipay.trade.page.pay-JAVA-UTF-8/notify_url.jsp"; 
	
	// 页面跳转同步通知页面路径 需http://格式的完整路径，不能加?id=123这类自定义参数，必须外网可以正常访问
	
	// TODO 这里需要配置支付宝回调的前端路径，必须要外网可以访问
	public static String return_url = "http://localhost:8080/alipay.trade.page.pay-JAVA-UTF-8/return_url.jsp";	

	// 签名方式
	public static String sign_type = "RSA2";

	// 字符编码格式
	public static String charset = "UTF-8";

	// 支付宝网关
	public static String gatewayUrl = "https://openapi.alipaydev.com/gateway.do";

	// 日志路径
	public static String log_path = "C:\\";

	// ↑↑↑↑↑↑↑↑↑↑请在这里配置您的基本信息↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑

	/**
	 * 写日志，方便测试（看网站需求，也可以改成把记录存入数据库）
	 * 
	 * @param sWord 要写入日志里的文本内容
	 */
	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();
				}
			}
		}
	}
}

public interface AlipayService {

  /**
   * 发起支付
   * @param outTradeNo  订单编号（唯一）
   * @param totalAmount  订单价格
   * @param subject    商品名称
   */
  String goPay(String outTradeNo,BigDecimal totalAmount,String subject) throws Exception;
  
  /**
   * 交易查询
   * @param outTradeNo 订单编号（唯一）
   */
  String query(String outTradeNo) throws AlipayApiException;
  
  /**
   * 交易关闭
   * @param outTradeNo订单编号（唯一）
   */
  String close(String outTradeNo) throws AlipayApiException;
}

public class AlipayServiceImpl implements AlipayService {

	@Autowired
	private RechargeDetailService rechargeDetailService;

	@Override
	public 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，支付成功页面 */
		alipayRequest.setReturnUrl(AlipayConfig.return_url);
		/** 异步通知，支付完成后，需要进行的异步处理 */
		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\"}");

		/** 转换格式 */
		String form = "";

		form = alipayClient.pageExecute(alipayRequest).getBody();

		return form;

	}
	@Override
	public 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();
		/** 请求接口 */
		alipayRequest.setBizContent("{\"out_trade_no\":\"" + outTradeNo + "\"," + "\"trade_no\":\"" + "" + "\"}");
		/** 转换格式 */
		String result = alipayClient.execute(alipayRequest).getBody();
		return result;
	}

	@Override
	public 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;
	}
}

public class AlipayController {

  @Autowired
  private AlipayService alipayService;
  
  /**
   * 订单支付
   */
  @GetMapping("goPay")
  public Map<Object, Object> goPay() throws Exception{
    /** 模仿数据库，从后台调数据*/
    String outTradeNo = "202101010001";
    BigDecimaltotalAmount = new BigDecimal(10000);
    String subject = "苹果12";
    
    String pay = alipayService.goPay(outTradeNo, totalAmount, subject);
    
    Map<Object, Object> pays = new HashMap<>();
    pays.put("pay", pay);
    
    return pays;
  }
  
  /**
   * 交易查询
   */
  @PostMapping("aipayQuery")
  public Result<Object> alipayQuery() throws Exception{
    /**调取支付订单号*/
    String outTradeNo = "13123";
    
    String query = alipayService.query(outTradeNo);
    
    Object json = JSONObject.toJSON(query);
    
    /*JSONObject jObject = new JSONObject();
    jObject.get(query);*/
    return Result.success(json);
  }
  
  /**
   * 交易关闭
   * @throws AlipayApiException 
   */
  @PostMapping("alipayclose")
  public Result<Object> alipaycolse() throws AlipayApiException{
    
    /** 调取数据*/
    String outTradeNo = "13123";
    
    String close = alipayService.close(outTradeNo);
    
    return Result.success(close);
  }
  /**
	 * 异步通知支付结果
	 * 
	 * @param request
	 * @return String
	 * @throws AlipayApiException
	 * @throws ParseException
	 */
	@PostMapping("/callBack")
	public String alipayNotify(HttpServletRequest request) throws Exception {

		// 获取支付宝的请求信息
		Map<String, String> map = new HashMap<>();
		Map<String, String[]> requestParams = request.getParameterMap();
		if(requestParams.isEmpty()) {
			return "failure";
		}
		// 将 Map<String,String[]> 转为 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);
		}
		// 验签
		boolean signVerified = AlipaySignature.rsaCheckV1(map, AlipayConfig.alipay_public_key, AlipayConfig.charset,
				AlipayConfig.sign_type);
		// 验签通过
		if (signVerified) {
			//支付成功后进行操作
		}
		return "failure";
	}
}