Jackson Map To Object

In jackson json map example example, we will learn to convert json to map object and then we will learn to convert java map to json. We are using jackson library to convert java map to json array so let's add below jackson dependency to your project's classpath or pom.xml. The main class in the jackson library for reading and writing json is objectmapper.

Using jackson api for map deserialization we can use the objectmapper.readvalue () method for converting a json text to a map object. By the way, the reason it is called objectmapper is because it maps json into java objects (deserialization), or java objects into json (serialization). Finally, it prints out the java employee object that got created by the mapper.

We will create person class & we will perform following operations with person class.

Java map to json : Convert the incoming json request body to java object of your method @requestbody argument. Next, the code uses the objectmapper instance to deserialize the json string. Working with predefined json data structures with jackson is straightforward.