java8对List去重

@Data
@NoArgsConstructor
@AllArgsConstructor
public class Student {
    private String name;
    private String sex;
    private Integer age;
}
  public static  void Test()
    {
        ArrayList listStudent = new ArrayList<>();
        listStudent.add(new Student("小明","男",10));
        listStudent.add(new Student("小花","女",8));
        listStudent.add(new Student("小李","男",9));
        listStudent.add(new Student("小刚","男",10));
        listStudent.add(new Student("小红","女",8));
        listStudent.add(new Student("小明","男",9));
		//按照age属性，对List进行去重处理
        listStudent = listStudent.stream()
            .collect(Collectors.collectingAndThen(
                    Collectors.toCollection(() -> new TreeSet<>(Comparator.comparing(Student::getAge))), ArrayList::new));
        //打印结果
        listStudent.forEach(Student-> System.out.println(Student.toString()));
    }
     //运行结果
   Student(name=小花, sex=女, age=8)
   Student(name=小李, sex=男, age=9)
   Student(name=小明, sex=男, age=10)
//对于多属性去重
public static  void Test2()
    {
        ArrayList listStudent = new ArrayList<>();
        listStudent.add(new Student("小明","男",1));
        listStudent.add(new Student("小明","男",6));
        listStudent.add(new Student("小红","女",2));
        listStudent.add(new Student("小红","女",5));
        listStudent.add(new Student("小李","男",3));
        listStudent.add(new Student("小李","男",4));
        //根据name和sex两个属性去重，若两个属性都相同，则认为为相同
       List listTemp = listStudent.stream()
                .collect(Collectors.collectingAndThen(
                        Collectors.toCollection(() -> new TreeSet<>(Comparator.comparing(o -> o.getName() + ";" + o.getSex()))), ArrayList::new));
        //打印结果
        listTemp.forEach(Student-> System.out.println(Student.toString()));
    }
    //运行结果
    Student(name=小明, sex=男, age=1)
    Student(name=小李, sex=男, age=3)
   Student(name=小红, sex=女, age=2)