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Save Data to a JSON File with Gson 1. Overview Gson is a Java library that allows us to convert Java Objects into a JSON representation. We can also use it the other way around, to convert a JSON string to an equivalent Java object. In this quick tutorial, we’ll… Continue Reading gson-save-file

Convert JSON to a Map Using Gson 1. Introduction In this quick tutorial, we’ll learn how to convert a JSON string to a Map using Gson from Google. We’ll see three different approaches to accomplish that and discuss their pros and cons – with some practical examples. 2. Passing Map.class… Continue Reading gson-json-to-map

Exclude Fields from Serialization in Gson 1. Overview In this short tutorial, we’re going to explore the available options for excluding one or more fields of a Java class and its subclasses from Gson serialization. 2. Initial Setup Let’s first define our classes: @Data @AllArgsConstructor public class MyClass { private… Continue Reading gson-exclude-fields-serialization

Jackson vs Gson 1. Introduction In this article, we’ll compare the Gson and Jackson APIs for serializing and deserializing JSON data to Java objects and vice-versa. Gson and Jackson are complete libraries offering JSON data-binding support for Java. Each are actively developed open-source projects which offer to handle of complex… Continue Reading jackson-vs-gson

Gson Serialization Cookbook In this article we’re going to look at the most common scenarios of serialization using the Gson library. Let’s start by introducing a simple entity that we’re going to use throughout the following examples: public class SourceClass { private int intValue; private String stringValue; // standard getters… Continue Reading gson-serialization-guide

Mapping Multiple JSON Fields to a Single Java Field 1. Overview In this tutorial, we’ll see how to use both Jackson and Gson to map different JSON fields onto a single Java field. 2. Maven Dependencies In order to use the Jackson and Gson libraries we need to add the… Continue Reading json-multiple-fields-single-java-field

JSON in Java 1. Overview Working with JSON data in Java can be easy, but – like most anything in Java – there are a lot of options and libraries we can chose from. This guide should make that choice easier and should give you a solid understanding of the… Continue Reading java-json

Serializing and Deserializing a List with Gson 1. Introduction In this tutorial, we’ll explore a few advanced serialization and deserialization cases for List using Google’s Gson library. 2. List of Objects One common use case is to serialize and deserialize a list of POJOs. Consider the class: public class MyClass… Continue Reading gson-list

Working with Primitive Values in Gson 1. Overview In this tutorial, we’re going to learn how to serialize and deserialize primitive values with Gson. Google developed the Gson library to serialize and deserialize JSON. Additionally, we’re going to learn about some specific quirks that the Gson library has when it… Continue Reading java-gson-primitives

Convert String to JsonObject with Gson 1. Overview When working with JSON in Java using the Gson library, we have several options at our disposal for converting raw JSON into other classes or data structures that we can work with more easily. For example, we can convert JSON strings to… Continue Reading gson-string-to-jsonobject