Java中List集合中多个字段如何排序

开源项目SDK：https://github.com/mingyang66/spring-parent
个人文档：https://mingyang66.github.io/raccoon-docs/#/

一、首先定义一个三个属性的People类

public class People {
    private String name;
    private int age;
    private int height;

    public People(String name, int age, int height) {
        this.name = name;
        this.age = age;
        this.height = height;
    }
    }

二、定义一个List集合列表

        List<People> list = List.of(
                new People("Emily", 18, 20),
                new People("田晓霞", 28, 165),
                new People("lili", 19, 28),
                new People("lili", 19, 21),
                new People("Tom", 20, 22)
        );

三、列表先按照age升序再按照height升序排序

List<People> data = list.stream().sorted(Comparator.comparing(People::getAge).thenComparing(People::getHeight)).toList();

sorted方法默认是升序

四、列表先按照age降序再按照height降序排列

List<People> data = list.stream().sorted(Comparator.comparing(People::getAge).thenComparing(People::getHeight).reversed()).toList();

排序后添加reversed方法自动反转排序结果，即按先按照age降序，再按照height降序排列。