Let us see how we did the same:Įach key in the json maps to the corresponding instance variable. Let take our CookBook example again and start building the POJOs from bottom-up, ie the leaf nodes Point 4 is mandatory as the library we will use to perform the conversion uses Java's reflections for which getters and empty constructors are important ![]() The POJO shall have Getters and an empty constructor. ![]() Collection of objects shall be a List in java.All nested objects in the Json will be Java classes.All leaf keys in the Json will be primitive data types Overview JSON (JavaScript Object Notation) is a lightweight data-interchange format, and we most commonly use it for client-server communication.Some basic rules we need to follow while creating POJOs: Now that we have some gist of the process involved, let us write down the detailed steps in order to convert a Json to a Java object Create a POJO (Plain Old Java Object) to be Converted into JSON As a backend developer in CookBook, you are supposed to give the json contract of a list of recipes to the front end team Imagine that you are a developer of a cooking recipe application CookBook, an app for cooking recipes. Let us take the example to understand the idea of a POJO better. ![]() A POJO is essentially a representation of a json structure in a Java class We suggest you please read following article.
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