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java拓展集合工具类CollectionUtils

2023-09-15 00:16:05 58

拓展集合工具类CollectionUtils，供大家参考，具体内容如下

packagecom.demo.utils;

importjava.lang.reflect.Method;
importjava.util.ArrayList;
importjava.util.Collection;
importjava.util.HashSet;
importjava.util.Iterator;
importjava.util.LinkedHashMap;
importjava.util.LinkedHashSet;
importjava.util.List;
importjava.util.Map;
importjava.util.Set;
importorg.slf4j.Logger;
importorg.slf4j.LoggerFactory;

importcom.demo.bean.EmployeeEntity;

/**
*
*自定义集合工具类拓展常用方法
*@autho董杨炀
*@time2017-4-10上午11:33:36
*/
publicclassCollectionUtilsextendsorg.apache.commons.collections.CollectionUtils{

privatestaticfinalLoggerLOGGER=LoggerFactory.getLogger(CollectionUtils.class);

privatestaticfinalintDEFAULT_SIZE=1000;

/**
*
*拆分List为固定大小的多个集合
*推荐使用
*返回集合的size越小,此方法性能越高
*@parambaseList
*@paramsize
*@returnArrayList
*@autho董杨炀
*@time2017-4-10上午11:30:43
*/
@SuppressWarnings("unchecked")
publicstaticList>fastSplitList(ListbaseList,intsize){
if(baseList==null||baseList.size()==0){
returnnull;
}
if(size<=0){
size=DEFAULT_SIZE;
}
intarrSize=baseList.size()%size==0?baseList.size()/size:baseList.size()/size+1;
List>resultList=newArrayList>();
for(inti=0;i)newArrayList

java拓展集合工具类CollectionUtils

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