对象时间排序，如果时间为空放到最后
public class DataVo {
/**
* ID
*/
private String id;
/**
* 时间
*/
private Date date;
}
public static void main(String[] args) {
List<DataVo> dataVos = new ArrayList<>();
DataVo dataVo1 = new DataVo();
dataVo1.setDate(new Date());
dataVo1.setId("1");
dataVos.add(dataVo1);
DataVo dataVo2 = new DataVo();
dataVo2.setId("2");
dataVos.add(dataVo2);
DataVo dataVo3 = new DataVo();
dataVo3.setId("3");
dataVo3.setDate(new Date());
dataVos.add(dataVo3);
dataVos = dataVos.stream().sorted(Comparator.comparing(d -> d.getDate(), Comparator.nullsLast(Date::compareTo))).collect(Collectors.toList());
dataVos.forEach(data -> System.out.println(data));
}
DataVo{id='1', date=Tue Aug 20 10:07:49 CST 2019}
DataVo{id='3', date=Tue Aug 20 10:07:49 CST 2019}
DataVo{id='2', date=null}
