java中list如何根据对象某个属性进行升序或者降序排序_java list.sort降序

1.写个测试类

@Data
@NoArgsConstructor
public class Test {
    
    private String id;
    private String name;
    private String age;
    private String  score;
}

2.做测试

    public static void main(String[] args) {
 
       List<Test> list=new ArrayList<>();
        list.add(new Test("zs",12,97.2));
        list.add(new Test("ls",8,62.3));
        list.add(new Test("ww",13,99.9));
 
 
        System.out.println("一开始的排序顺序");
        System.out.println(list);
 
        System.out.println(" 按照age 升序");
        list.sort(Comparator.comparing(Test::getAge));  //核心代码
        System.out.println(list);
 
        System.out.println("按照score 降序");
        list.sort(Comparator.comparing(Test::getScore).reversed()); //核心代码
        System.out.println(list);
 
    }