存储大量的ArrayList到SQLite的 [英] Storing large ArrayLists to SQLite

问题描述

我即时通讯开发一个应用程序中，我不断地下载大量的数据。

I im developing a application in which I continuously download large amount of data.

JSON格式的数据和我用GSON来反序列化。现在林保存这一个SQLite数据库。我要计算的关系，并将其存储到关系数据库。然而，这需要太多的时间。

The data in json format and I use Gson to deserialize it. By now Im storing this in a SQLite db. And I have to calculate the relationship and store them into a relationship db. However this takes too much time.

这将是更方便的类对象保存到数据库中。

It would be much more convenient to save the class objects to db.

数据看起来像这样反序列化后：

The data looks something like this after deserialization:

Class A{
private String name;
private List<B> subItems;
}

Class B{
private String name;
private List<C> subItems
}

我能坚持这一个更简单的方法，例如通过使它们可序列化的？如何才能做到这一点？

Can I persist this in a easier way, for example by making them serializable? How can this be done?

推荐答案

是的，系列化是你的情况更好的解决方案，它在Android的工作。下面的例子是从<一个取href=\"http://www.jondev.net/articles/Android_Serialization_Example_%28Java%29\">http://www.jondev.net/articles/Android_Serialization_Example_%28Java%29

Yes, serialization is a better solution in your case and it works in Android. The following example is taken from http://www.jondev.net/articles/Android_Serialization_Example_%28Java%29

序列化方法

  public static byte[] serializeObject(Object o) { 
    ByteArrayOutputStream bos = new ByteArrayOutputStream(); 

    try { 
      ObjectOutput out = new ObjectOutputStream(bos); 
      out.writeObject(o); 
      out.close(); 

      // Get the bytes of the serialized object 
      byte[] buf = bos.toByteArray(); 

      return buf; 
    } catch(IOException ioe) { 
      Log.e("serializeObject", "error", ioe); 

      return null;
    } 

反序列化方法

  public static Object deserializeObject(byte[] b) { 
    try { 
      ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(b)); 
      Object object = in.readObject(); 
      in.close(); 

      return object; 
    } catch(ClassNotFoundException cnfe) { 
      Log.e("deserializeObject", "class not found error", cnfe); 

      return null; 
    } catch(IOException ioe) { 
      Log.e("deserializeObject", "io error", ioe); 

      return null;
  } 

这篇关于存储大量的ArrayList到SQLite的的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！