RESTful Java Web Services - Third Edition

Using Jackson tree model APIs to query and update data

You will use the com.fasterxml.jackson.databind.ObjectMapper class to convert the JSON data into a tree representation. This class has a variety of APIs to build a tree from the JSON data. The tree representation built from JSON is made up of com.fasterxml.jackson.databind.JsonNode instances. This is similar to the DOM nodes in an XML DOM tree. You can also navigate through JsonNode to identify specific elements present in the tree hierarchy. The following example illustrates the use of Jackson tree model APIs.

This example generates a tree hierarchy for the JSON array of employee objects and then queries the generated tree for the employee nodes with the null email value. This example ...