content: package com.platform.admin.util;
  
  import cn.hutool.core.lang.Filter;
  import cn.hutool.core.map.MapUtil;
  import cn.hutool.core.util.StrUtil;
  import com.google.common.collect.ImmutableList;
  
  import java.util.List;
  import java.util.Map;
  
  /**
   * 分页工具类
   */
  public class PageUtils {
      /**
       * 用于保存分页查询用到的关键字
       */
      public static final List<String> PAGE_QUERY_KEY_LIST = ImmutableList.of("current", "size", "sortBy", "orderby", "order", "sort", "ifCount", "ascs", "descs");
  
  
      /**
       * 过滤pageHelper的参数、空值等
       * 返回查询条件
       *
       * @return
       */
      public static Map<String, Object> filterColumnQueryParams(Map<String, Object> map) {
          return MapUtil.filter(map, (Filter<Map.Entry<String, Object>>) e -> {
              if (StrUtil.isBlank(StrUtil.toString(e.getValue()))) {
                  return false;
              }
              if (PAGE_QUERY_KEY_LIST.contains(e.getKey())) {
                  return false;
              }
              return true;
          });
      }
  
      /**
       * 返回pageHelper用到的参数
       *
       * @return
       */
      public static Map<String, Object> filterPageParams(Map<String, Object> map) {
          return MapUtil.filter(map, (Filter<Map.Entry<String, Object>>) e -> {
              if (StrUtil.isBlank(StrUtil.toString(e.getValue()))) {
                  return false;
              }
              if (PAGE_QUERY_KEY_LIST.contains(e.getKey())) {
                  return true;
              }
              return false;
          });
      }
  }
  