java 如何 进行序列化和反序列化

Java中的序列化是将对象转换为字节流的过程，而反序列化是将字节流转换回对象的过程。Java提供了一个Serializable接口，当一个类实现了Serializable接口时，就可以将其实例序列化为字节流。

序列化：

try {
    FileOutputStream fileOut = new FileOutputStream("employee.ser");
    ObjectOutputStream out = new ObjectOutputStream(fileOut);
    out.writeObject(employee);
    out.close();
    fileOut.close();
    System.out.println("Serialized data is saved in employee.ser");
} catch (IOException i) {
    i.printStackTrace();
}

反序列化：

try {
    FileInputStream fileIn = new FileInputStream("employee.ser");
    ObjectInputStream in = new ObjectInputStream(fileIn);
    Employee e = (Employee) in.readObject();
    in.close();
    fileIn.close();
    System.out.println("Deserialized Employee...");
    System.out.println("Name: " + e.name);
    System.out.println("Address: " + e.address);
    System.out.println("SSN: " + e.SSN);
    System.out.println("Number: " + e.number);
} catch (IOException i) {
    i.printStackTrace();
} catch (ClassNotFoundException c) {
    System.out.println("Employee class not found");
    c.printStackTrace();
}