code: private static String getRowKeys(String[] rowKeyColumns, Map<String, Object> data) {
          StringBuilder rowKeyValue = new StringBuilder();
          for (String rowKeyColumnName : rowKeyColumns) {
              Object obj = data.get(rowKeyColumnName);
              if (obj != null) {
                  rowKeyValue.append(obj.toString());
              }
              rowKeyValue.append("|");
          }
          int len = rowKeyValue.length();
          if (len > 0) {
              rowKeyValue.delete(len - 1, len);
          }
          return rowKeyValue.toString();
      }
docs: 获取复合字段作为rowKey的拼接
  
  @param rowKeyColumns 复合rowK对应的字段
  @param data 数据
  @return