object-serialization | 易学教程

Java object Serialization and inheritance

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问题 Say you have these two classes, Foo and Bar where Bar extends Foo and implements Serializable class Foo { public String name; public Foo() { this.name = "Default"; } public Foo(String name) { this.name = name; } } class Bar extends Foo implements java.io.Serializable { public int id; public Bar(String name, int id) { super(name); this.id = id; } } Notice that Foo doesn't implement Serializable . So what happens when bar is serialized? public static void main(String[] args) throws Exception {

Serializing PHP object to JSON

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So I was wandering around php.net for information about serializing PHP objects to JSON, when I stumbled across the new JsonSerializable Interface . It's only PHP >= 5.4 though, and I'm running in a 5.3.x environment. How is this sort of functionality achieved PHP < 5.4 ? I've not worked much with JSON yet, but I'm trying to support an API layer in an application, and dumping the data object ( that would otherwise be sent to the view ) into JSON would be perfect. If I attempt to serialize the object directly, it returns an empty JSON string; which is because I assume json_encode() doesn't know

What is object serialization?

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问题 What is meant by \"object serialization\"? Can you please explain it with some examples? 回答1: Serialization is the conversion of an object to a series of bytes, so that the object can be easily saved to persistent storage or streamed across a communication link. The byte stream can then be deserialized - converted into a replica of the original object. 回答2: You can think of serialization as the process of converting an object instance into a sequence of bytes (which may be binary or not