java 实体类集合排序

List<Bean> lbean =newArrayList<>();//添加几个实体类到list里面

Collections.sort(lbean, new Comparator<Bean>(){

publicintcompare(Beano1,Beano2) { //按照创建时间降序排列

if(o1.getCreateTime() < o2.getCreateTime()){

return1;

}

if(o1.getCreateTime() == o2.getCreateTime() ){

return0;

}

return -1;

}

});

for(Bean bean:lbean ) {    System.out.println(bean.getCreateTime());}