在Java中将对象列表序列化为文件 [英] serializing a list of objects into a file in java

问题描述

我有大约20,000个对象的列表，这些对象又具有非常庞大的层次结构。我需要将对象转储到文件中，以便以后在处理过程中随时可以读取它。现在我的问题是，我在Java上工作，但在序列化方面工作不多，而且我对如何做到这一点也不了解。

I have a list of around 20,000 object, which in turn have a very huge hierarchy. I need to dump the objects into a file, so that i can read it later anytime during my process. Now my problem is, I have worked on Java but not that much on serialization and i dont have that much of knowledge how to do that.

在这种情况下，到目前为止我知道，我需要同时使用序列化和反序列化。谁能帮忙。我也可以使用任何新的API或普通的Java序列化。

In this case as far as i know, i need to use both Serialization ane De-Serialization. Can anyone please help. Also i can use any new API or normal Java Serialization.

注意。

推荐答案

查看此链接 http://www.java2s.com/Code/ Java / File-Input-Output / Objectserialization.htm
像这样：

Look at this link http://www.java2s.com/Code/Java/File-Input-Output/Objectserialization.htm Its something like this:

Card3 card = new Card3(12, Card3.SPADES);
    System.out.println("Card to write is: " + card);

    try {
      FileOutputStream out = new FileOutputStream("card.out");
      ObjectOutputStream oos = new ObjectOutputStream(out);
      oos.writeObject(card);
      oos.flush();
    } catch (Exception e) {
      System.out.println("Problem serializing: " + e);
    }

    Card3 acard = null;

    try {
      FileInputStream in = new FileInputStream("card.out");
      ObjectInputStream ois = new ObjectInputStream(in);
      acard = (Card3) (ois.readObject());
    } catch (Exception e) {
      System.out.println("Problem serializing: " + e);
    }

    System.out.println("Card read is: " + acard);

别忘了在要保存
并放入其中的所有类中实现Serializable接口在所有不想保存的字段上使用修饰符瞬态。
（例如，私有临时列表缓存；）

Don't forget to implement Serializable interface in all class you want to save and put modifier "transient" at all fields you don't want to save. (e.g. private transient List cache;)

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