UserEntity user1 = UserEntity.builder().id(1).name("張三").sex(0).build();
        UserEntity user2 = UserEntity.builder().id(2).name("李四").sex(0).build();
        UserEntity user3 = UserEntity.builder().id(3).name("張三").sex(0).build();
        UserEntity user4 = UserEntity.builder().id(4).name("李四").sex(0).build();
        UserEntity user5 = UserEntity.builder().id(5).name("王五").sex(1).build();
        List<UserEntity> UserList = new ArrayList<>();
        UserList.add(user1);
        UserList.add(user2);
        UserList.add(user3);
        UserList.add(user4);
        UserList.add(user5);
        System.out.println("（1）創建測試數據:"+UserList);

List<UserEntity> UserList2 = UserList.stream().collect(
                Collectors.collectingAndThen(
                        Collectors.toCollection(
                                () -> new TreeSet<>(Comparator.comparing(p -> p.getName()+ p.getSex()))),ArrayList::new));
        System.out.println("（2）將姓名、性別一致的進行過濾："+UserList2);

List<UserEntity> collect = UserList.stream().sorted(Comparator.comparing(UserEntity::getId).reversed()).collect(Collectors.toList());
System.out.println("（3）將數據按照id倒敘進行排序："+collect);

 List<UserEntity> result = UserList.stream()
                .flatMap(x -> UserList2.stream()
                        .filter(y -> x.getName().equals(y.getName()) && x.getSex().equals(y.getSex())))
                .peek(y -> {
                    y.setName("張三豐");
                }).collect(Collectors.toList());
        System.out.println("（4）將姓名.性別一致的在主數據中過濾出來，并且將名稱賦值成\"張三豐\"："+result);

 Map<Integer, List<UserEntity>> collect1 = UserList.stream().collect(Collectors.groupingBy(UserEntity::getSex));
        System.out.println("（5-1）獲取性別是【0】的數據信息"+collect1.get(0));
        System.out.println("（5-2）獲取性別是【1】的數據信息"+collect1.get(1));
        for (Map.Entry<Integer, List<UserEntity>> entry : collect1.entrySet()) {
            System.out.println("（5-3）將測試數據按照性別進行分組-遍歷方法一：-key = " + entry.getKey() + ", value = " + entry.getValue());
        }
        collect1.forEach((k, v) -> System.out.println("（5-4）將測試數據按照性別進行分組-遍歷方法二：-key = " + k + ", value = " + v));

（1）創建測試數據:[UserEntity(id=1, name=張三, sex=0), UserEntity(id=2, name=李四, sex=0), UserEntity(id=3, name=張三, sex=0), UserEntity(id=4, name=李四, sex=0), UserEntity(id=5, name=王五, sex=1)]
（2）將姓名、性別一致的進行過濾：[UserEntity(id=1, name=張三, sex=0), UserEntity(id=2, name=李四, sex=0), UserEntity(id=5, name=王五, sex=1)]
（3）將數據按照id倒敘進行排序：[UserEntity(id=5, name=王五, sex=1), UserEntity(id=4, name=李四, sex=0), UserEntity(id=3, name=張三, sex=0), UserEntity(id=2, name=李四, sex=0), UserEntity(id=1, name=張三, sex=0)]
（4）將姓名.性別一致的在主數據中過濾出來，并且將名稱賦值成"張三豐"：[UserEntity(id=1, name=張三豐, sex=0), UserEntity(id=2, name=張三豐, sex=0), UserEntity(id=5, name=張三豐, sex=1)]
（5-1）獲取性別是【0】的數據信息[UserEntity(id=1, name=張三豐, sex=0), UserEntity(id=2, name=張三豐, sex=0), UserEntity(id=3, name=張三, sex=0), UserEntity(id=4, name=李四, sex=0)]
（5-2）獲取性別是【1】的數據信息[UserEntity(id=5, name=張三豐, sex=1)]
（5-3）將測試數據按照性別進行分組-遍歷方法一：-key = 0, value = [UserEntity(id=1, name=張三豐, sex=0), UserEntity(id=2, name=張三豐, sex=0), UserEntity(id=3, name=張三, sex=0), UserEntity(id=4, name=李四, sex=0)]
（5-3）將測試數據按照性別進行分組-遍歷方法一：-key = 1, value = [UserEntity(id=5, name=張三豐, sex=1)]
（5-4）將測試數據按照性別進行分組-遍歷方法二：-key = 0, value = [UserEntity(id=1, name=張三豐, sex=0), UserEntity(id=2, name=張三豐, sex=0), UserEntity(id=3, name=張三, sex=0), UserEntity(id=4, name=李四, sex=0)]
（5-4）將測試數據按照性別進行分組-遍歷方法二：-key = 1, value = [UserEntity(id=5, name=張三豐, sex=1)]