s-day10-反序列化流读取对象(ObjectInputStream)

s-day10/src/com/inmind/object_stream03/Demo10.java

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+package com.inmind.object_stream03;
+
+import java.io.*;
+
+/*
+反序列化流读取对象(ObjectInputStream)
+构造方法：
+    ObjectInputStream(InputStream in) 创建从指定的InputStream读取的ObjectInputStream。
+
+常用方法：
+    Object readObject() 从ObjectInputStream读取一个对象。
+
+ */
+public class Demo10 {
+    public static void main(String[] args) throws Exception {
+        //使用反序列化流读取之前保存的学生对象
+        FileInputStream fis = new FileInputStream("student.txt");
+        ObjectInputStream ois = new ObjectInputStream(fis);
+        Object o = ois.readObject();//多态：父类引用指向子类对象
+        if (o instanceof Student) {
+            Student s = (Student) o;
+            System.out.println(s);
+        }
+    }
+}