Question

我将序列化添加到我的数据库项目中，并且我在理解如何反序列化链接列表时遇到问题。我认为我正确地序列化了，但是我想在那里反馈我的实现以及我并不完全确定它是正确的方法。

我的自定义链接列表注册：

/*
class which is used to create the
enrollment linked list referencing
Student and Course objects
*/
public class Enrollment implements Serializable
{
    private Student student;
    private Course course;
    private Enrollment link;

    public Enrollment(Student student, Course course)
    {
        this.student = student;
        this.course = course;
        this.link = null;
    }

    //returns student object to caller
    public Student getStudent()
    {
        return student;
    }

    //sets student field
    public void setStudent(Student student)
    {
        this.student = student;
    }

    //returns course object to caller
    public Course getCourse()
    {
        return course;
    }

    //sets course field
    public void setCourse(Course course)
    {
        this.course = course;
    }

    //returns link to caller
    public Enrollment getLink()
    {
        return link;
    }

    //sets link field
    public void setLink(Enrollment link)
    {
        this.link = link;
    }

}//end Enrollment

对于序列化，我有一个名为allEnrollment的列表前面的对象引用。我认为仅序列化此引用不会序列化整个列表，而只是序列化第一个节点。这是我序列化链表的方法（如果不是这样的话，请纠正我）：

void saveEnrollment(String filename) throws IOException
    {
        ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(filename));
        Enrollment currNode = allEnrollment;

        //iterating thru linked list and writing each object to file
        while (currNode != null)
        {
            out.writeObject(currNode);
            currNode = currNode.getLink();
        }

        out.close();
    }

假设我的saveEnrollment方法对于序列化是正确的，我该如何正确地反序列化这个链表？我挣扎得很厉害，可以使用一些建议。我所做的所有阅读都让我更加困惑。所有入学成员都实施Serializable，所以我应该在那里做得很好。提前谢谢。

编辑：

以下是我从下面的建议中添加的反序列化方法，以防其他人想要查看它以供将来参考：

    void loadEnrollment(String filename) throws ClassNotFoundException, IOException
    {
        ObjectInputStream in = new ObjectInputStream(new FileInputStream(filename));
        allEnrollment = (Enrollment)in.readObject();

    }

Answer 1

您无需做任何事情。只要Enrollment和Student类为Serializable，序列化列表的头部将序列化整个列表，反序列化将恢复整个列表。

void saveEnrollment(String filename) throws IOException
{
    ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(filename));
    out.writeObject(allEnrollment);
    out.close();
}

在java中序列化/反序列化自定义链接列表的正确方法？

1 个答案: