Java Google Json (Gson) Serializing Generics

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Serializing list As we saw in the previous tutorial serializing and deserializing classes with generic types is non trivial since generic type information is lost while serializing. Gson provides a class called com.google.gson.reflect.TypeToken to store generic types. The example below shows how to use the TypeToken class to serialize and deserialize Classes with generic types. … Read more

Java Google Json (Gson) Serializing Collections

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Serializing list Serializing Collections should have been similar to serializing other objects. However, the problem is that Collections are generic and the generic type information is not maintained in the json. We therefore pass the type while deserializing list. Note that if the Collection has different types of objects then there is no way to … Read more

Java Gson – Convert json to a java object tree

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Converting json to a java object In the Earlier tutorial we saw how to convert json to a java object. In this tutorial, we build a tree of com.google.gson.JsonElement from the json string. The tree can then be traversed to build java objects. JsonElement has methods such as isJsonObject(), isJsonNull(), etc that can be used … Read more

Java Gson – Convert JSON string to a java object

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Google json provides methods to convert a JSON string to a Java object. Gson uses the name to match the json property to the java field. There are two ways to convert json to java. Using the com.google.gson.Gson class. Create a new instance of this class and use the method public <T> T fromJson(String json, … Read more

Java Google Json (Gson) Introduction

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Overview of The Gson API google json – gson is an open source java api for parsing and building json. It has extensive support for java generics. It also provides support for converting third party classes to json. It can be used to serialize and deserialize complex objects with deep hierarchies that may contain generic … Read more

Java json – jackson Mix- In Annotations

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Also see json simple org.json Annotations are a great way to manage serialization and deserialization in Jackson. However, what do you do if you want to annotate a third party class, or if you dont want to tightly couple your POJOs to jackson annotations. This is where Mix-in comes into play. You define a mix-in … Read more

Java json – jackson List serialization

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Also see json simple org.json In this tutorial we will see how to convert a java List to JSON. Serializing list is a little tricky since by default the type info is not stored while serializing and deserializing lists. In this tutorial we look at two examples. In the first example we serialize an Object … Read more