list 排序涉及的接口 Comparator, 具体实现代码如下,以Apple类为例
public class Test{
public static void main(String [] args){
List<Apple> apples = new ArrayList<>(); Comparator<Apple> byName = Comparator.comparing(Apple::getName); Comparator<Apple> bySizeDesc = Comparator.comparing(Apple::getSize).reversed();
// 先以名称升序排列,再按照size倒叙排列
apples.sort(byName.thenComparing(bySizeDesc));
}
} @Data public class Apple{ private String color; private String name; private Integer size;
}