关于网站建设的申请书自己制作的网站上传到服务器后怎么原来的网页没有变

利用HashSet

创建了一个HashSet用于存储唯一的字段值，并创建了一个新的列表uniqueList用于存储去重后的对象。遍历原始列表时，如果字段值未在HashSet中出现过，则将其添加到HashSet和uniqueList中。

		List<Person> originalList = new ArrayList<>();originalList.add(new Person(1, "Alice"));originalList.add(new Person(2, "Bob"));originalList.add(new Person(3, "Alice"));originalList.add(new Person(4, "Charlie"));originalList.add(new Person(5, "Alice"));HashSet<String> uniqueSet = new HashSet<>();List<Person> uniqueList = new ArrayList<>();for (Person person : originalList) {if (uniqueSet.add(person.getName())) {uniqueList.add(person);}}System.out.println(uniqueList);

利用Stream

		List<Person> originalList = new ArrayList<>();originalList.add(new Person(1, "Alice"));originalList.add(new Person(2, "Bob"));originalList.add(new Person(3, "Alice"));originalList.add(new Person(4, "Charlie"));originalList.add(new Person(5, "Alice"));List<Person> uniqueList = originalList.stream().collect(Collectors.toMap(Person::getName, person -> person, (p1, p2) -> p1)).values().stream().collect(Collectors.toList());System.out.println(uniqueList);

		List<Person> originalList = new ArrayList<>();originalList.add(new Person(1, "Alice"));originalList.add(new Person(2, "Bob"));originalList.add(new Person(3, "Alice"));originalList.add(new Person(4, "Charlie"));originalList.add(new Person(5, "Alice"));List<Person> list = new ArrayList<>(originalList);list = list.stream().collect(Collectors.collectingAndThen(Collectors.toCollection(() -> new TreeSet<>(Comparator.comparing(Person::getName))), ArrayList::new));System.out.println(uniqueList);