根据属性获取List集合中重复的元素

    @Data
    @AllArgsConstructor
    @NoArgsConstructor
    class Person{
        private String name;
        private Integer age;
        private Integer wages;

    }



    @Test
    void contextLoads() {
        List personList = new ArrayList();
        personList.add(new Person("张三", 8, 3000));
        personList.add(new Person("李四", 8, 5000));
        personList.add(new Person("王五", 28, 7000));
        personList.add(new Person("孙六1", 38, 1));
        personList.add(new Person("孙六", 39, 2));
        personList.add(new Person("孙六", 40, 3));
        personList.add(new Person("孙七", 41, 4));
        personList.add(new Person("孙七", 42, 5));

        //1.先根据得到一个属于集合
        List