Java 泛型集合根據對象某一屬性去重

		Person p1 = new Person();
		p1.setId(1);
		p1.setName("11");
        Person p2 = new Person();
        p2.setId(1);
		p2.setName("22");
        Person p3 = new Person();
        p3.setId(8);
		p3.setName("88");
        List<Person> persons = Arrays.asList(p1,p2,p3);
        System.out.println("去重前---------------------------------");
        persons.forEach(e -> System.out.println(e.getId()));
        List<Person> unique = persons.stream().collect(
                Collectors.collectingAndThen(
                        Collectors.toCollection(() -> new TreeSet<>(Comparator.comparing(Person::getId))), ArrayList::new)
        );
        System.out.println("去重後---------------------------------");
        unique.forEach(p -> System.out.println(p.getId()));