Convert JSON to POJO

To convert between Java and JSON, there are a good number of APIs available to choose from.

You could "manually" step through the JSON components and extract values to populate Java objects, or you could use a JSON-to-Java binding API to take care of many low-level mapping concerns.

Jackson is such an API. It's easy to use and provides probably the fullest set of API features to address common issues and customizations. StackOverflow.com has many examples of how to use it.