Annotation Until and setVersion method

In this post under Gson, I will explain with an example how to use @Until annotation. The @Until annotation is used in combination with “GsonBuilder.setVersion” method. The annotation has no effect if it is not used along with “GsonBuilder.setVersion” method. The @Until annotation is used for the fields of the class and it accepts a…… Continue reading Annotation Until and setVersion method

Configuring Gson to serialize objects with fields having null value

Whenever we serialize a java object to JSON using Gson framework, by default fields with null values are ignored. As shown in the below code Main code import com.google.gson.Gson; public class GsonDemo7 { public static void main(String[] args) { Student student = new Student(); student.setId(1); student.setName(“name1”); student.setRollnum(100); student.setDate(null); Gson gson = new Gson(); String result…… Continue reading Configuring Gson to serialize objects with fields having null value

Writing JSON Data using JsonWriter

This post explains how to write json data to a file using JsonWriter. With JsonWriter we dont need to build the entire object in memory. The code explains how to write the below json data [ { “id”: 1, “text”: “text1”, “array”: null }, { “id”: 2, “text”: “text2!”, “array”: [ 50.454722, -104.606667 ] }…… Continue reading Writing JSON Data using JsonWriter