package com.sport.sportsfinetrackadminserver.common.utils;
import com.google.common.collect.Lists;
import org.springframework.util.CollectionUtils;
import java.util.List;
import java.util.Map;
/**
* @author zdj
* @version 1.0
* @date 2022/06/21 10:02
*/
public class CollectUtils {
/**
* 截取指定集合中的元素
* @param list 需要处理的集合
* @param interceptFactor 截取因子
* @return
*/
public static List<Map<String, Object>> truncateCollectByFactor(List<Map<String, Object>> list, int interceptFactor) {
List<Map<String, Object>> resultList = Lists.newArrayList();
if(CollectionUtils.isEmpty(list)){
return resultList;
}
if(interceptFactor >= list.size() || interceptFactor <= 0){
return list;
}
if(interceptFactor < list.size()){
return list.subList(0, interceptFactor);
}
return resultList;
}
}
使用:
// 取前10名
List<Map<String, Object>> resultList1 = CollectUtils.truncateCollectByFactor(resultList, 10);