content: 
  package com.platform.utils;
  
  import com.alipay.api.AlipayApiException;
  import com.alipay.api.internal.util.AlipaySignature;
  import com.platform.domain.AlipayConfig;
  import org.springframework.stereotype.Component;
  import javax.servlet.http.HttpServletRequest;
  import java.text.SimpleDateFormat;
  import java.util.Date;
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * 支付宝工具类
   * @author AllDataDC
   * @date 2023-01-27 14:04:35
   */
  @Component
  public class AlipayUtils {
  
      /**
       * 生成订单号
       * @return String
       */
      public String getOrderCode() {
          SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
          int a = (int)(Math.random() * 9000.0D) + 1000;
          System.out.println(a);
          Date date = new Date();
          String str = sdf.format(date);
          String[] split = str.split("-");
          String s = split[0] + split[1] + split[2];
          String[] split1 = s.split(" ");
          String s1 = split1[0] + split1[1];
          String[] split2 = s1.split(":");
          return split2[0] + split2[1] + split2[2] + a;
      }
  
      /**
       * 校验签名
       * @param request HttpServletRequest
       * @param alipay 阿里云配置
       * @return boolean
       */
      public boolean rsaCheck(HttpServletRequest request, AlipayConfig alipay){
  
          // 获取支付宝POST过来反馈信息
          Map<String,String> params = new HashMap<>(1);
          Map<String, String[]> requestParams = request.getParameterMap();
          for (Object o : requestParams.keySet()) {
              String name = (String) o;
              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] + ",";
              }
              params.put(name, valueStr);
          }
  
          try {
              return AlipaySignature.rsaCheckV1(params,
                      alipay.getPublicKey(),
                      alipay.getCharset(),
                      alipay.getSignType());
          } catch (AlipayApiException e) {
              return false;
          }
      }
  }
  