package J20250802.demo04; import java.io.*; import java.util.HashSet; import java.util.Map; import java.util.Set; import java.util.TreeSet; /** * @author WanJl * @version 1.0 * @title PersonService * @description * @create 2025/8/2 */ public class PersonService { private static TreeSet set=new TreeSet<>(); public static boolean saveToSet(Person p){ return set.add(p); } public static boolean saveToFile(Map set) { try{ FileOutputStream fos = new FileOutputStream("D:/abc.txt"); ObjectOutputStream oos=new ObjectOutputStream(fos); oos.writeObject(set); return true; }catch (IOException e){ return false; } } }