进阶day10-序列化流的练习

javaSE-day10/src/com/inmind/object_stream03/Student.java

@@ -11,7 +11,8 @@ public class Student implements Serializable {
     @Serial
     private static final long serialVersionUID = 7268053700279080345L;//字节码文件的版本号
     String name;
-    transient int age;//transient:瞬态，在序列化对象时，被它修饰的属性，不能被保存
+    //transient int age;//transient:瞬态，在序列化对象时，被它修饰的属性，不能被保存
+    int age;
 
     static String classroom = "1903";//不会被序列化，静态内容跟着字节码文件，只跟类有关
 
@@ -24,4 +25,11 @@ public class Student implements Serializable {
 
     }
 
+    @Override
+    public String toString() {
+        return "Student{" +
+                "name='" + name + '\'' +
+                ", age=" + age +
+                '}';
+    }
 }

javaSE-day10/src/com/inmind/object_stream03/Test13.java

@@ -0,0 +1,41 @@
+package com.inmind.object_stream03;
+
+import java.io.*;
+import java.util.ArrayList;
+
+/*
+1. 将存有多个自定义对象的集合序列化操作，保存到list.txt文件中。
+2. 反序列化list.txt ，并遍历集合，打印对象信息。
+ */
+public class Test13 {
+    public static void main(String[] args) throws IOException, ClassNotFoundException {
+        //创建集合保存学生对象
+        ArrayList<Student> students = new ArrayList<>();
+        students.add(new Student("张三", 18));
+        students.add(new Student("李四", 20));
+        students.add(new Student("王五", 19));
+
+        //序列化保存集合
+        ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("list.txt"));
+        oos.writeObject(students);
+        oos.close();
+
+        //创建反序列化流对象
+        ObjectInputStream ois = new ObjectInputStream(new FileInputStream("list.txt"));
+        Object o = ois.readObject();
+        ArrayList objs = null;
+        if (o instanceof ArrayList) {
+            objs = (ArrayList) o;
+        }
+
+        //遍历集合，打印对象信息。
+        for (Object obj : objs) {
+            if (obj instanceof Student) {
+                Student s = (Student) obj;
+                System.out.println(s.name);
+                System.out.println(s.age);
+                System.out.println(s);
+            }
+        }
+    }
+}