lambda中使用filter过滤

   /**
     * 测试filter
     */
    @Test
    public void testFilter() {
        List<User> user = new ArrayList<>();
        user.add(new User(1L, 18, "小明"));
        user.add(new User(2L, 20, "小王"));
        user.add(new User(3L, 28, "小刚"));
        user.add(new User(4l, 25, "小丽"));
        user.add(new User(5L, 18, "小明"));
  List<User> collect1 = user.stream().filter(e -> e.getAge() > 20).collect(Collectors.toList());
        System.out.println(JSON.toJSONString(collect1));
    }

 /**
     * 测试filter
     */
    @Test
    public void testFilter() {
        List<User> user = new ArrayList<>();
        user.add(new User(1L, 18, "小明"));
        user.add(new User(2L, 20, "小王"));
        user.add(new User(3L, 28, "小刚"));
        user.add(new User(4l, 25, "小丽"));
        user.add(new User(5L, 18, "小明"));
        List<User> collect = user.stream().filter(e -> e.getAge() > 20 && e.getId() > 3).collect(Collectors.toList());
        System.out.println(JSON.toJSONString(collect));
    }