# 12.1 Overview

JFinal's JSON module centers around the abstract class Json, which is designed for easy extension with third-party implementations. JFinal officially provides three JSON implementations: JFinalJson, FastJson, and Jackson. All three implementations extend the abstract class Json.

The core abstraction of the Json class is as follows:

public abstract class Json {
    public abstract String toJson(Object object);
    public abstract <T> T parse(String jsonString, Class <T> type);
}

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As shown in the code above, the Json abstraction consists of two methods for converting between Java objects and JSON strings. The toJson(...) method converts any Java type to a JSON string, while the parse method reverses a JSON string back into an object of a specified generic type.

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