List集合排序

java8 写法:

// 创建集合
List list= new ArrayList<>;
//日期字符串排序 节次排序(Student属性 bitherday和number 为String类型)
Comparator comparingDate = Comparator.comparing(Student::getBitherday);
Comparator comparingNUM = Comparator.comparing(Student::getNumber).reversed();//降序
// 多个字段联合排序：生日升序,number降序
list.sort(comparingDate.thenComparing(comparingNUM));