/*  * 排序  * sorted():自然排序(Comparable)  * sorted(Comparator com)：定制排序(Comparator)  */ List<String> list3 = Arrays.asList("aa", "bb", "cc", "dd", "ee");
list3.stream()
        .sorted()
        .forEach(System.out::println);

employeeList.stream()
        .sorted((e1, e2) -> {
    if (e1.getAge().equals(e2.getAge())) {
            return e1.getName().compareTo(e2.getName());
    } else {
        return e1.getAge().compareTo(e2.getAge());
    }
        }).forEach(System.out::println);