How can I convert a POJO to JSON and back to a POJO?

To convert a POJO (Plain Old Java Object) to JSON and vice versa, Java libraries like Jackson and Gson are commonly used.

These libraries provide methods like ObjectMapper.writeValue to serialize POJOs to JSON and ObjectMapper.readValue or Gson.fromJson  to deserialize JSON back into POJOs.

You can use annotations to control the serialization and deserialization process for more customization.

To convert a POJO to JSON and back to a POJO using Jackson:

POJO to JSON

1. Create an ObjectMapper instance.

2. Use the writeValueAsString method to convert the POJO to a JSON string.

JSON to POJO

1. Create an ObjectMapper instance.

2. Use the readValue method to convert the JSON string back to a POJO instance.