How to Parse JSON – Jackson Library?
We will use Jackson’s ObjectMapper to create a JSON object (ObjectNode) and a JSON array (ArrayNode). We then convert these structures to JSON strings for output and parse them back into JsonNode objects for input. We will demonstrates the process of creating, outputting, and inputting JSON objects and arrays using Jackson in Java. We will use Jackson Maven repository to use Jackson library.
Important Features of Jackson JSON Library
- Jackson is renowned for its exceptional performance in parsing and generating JSON data, making it a preferred choice for applications with demanding processing requirements.
- Jackson provides a powerful streaming API that efficiently process JSON data incrementally without the need to load the entire document into memory, contributing to better resource utilization.
- Jackson excels in data binding, enabling seamless conversion between Java objects and JSON representations. This feature simplifies the integration of JSON data into Java applications and vice versa.
- The inclusion of a tree model, represented by the JsonNode class, facilitates flexible manipulation of JSON structures. Developers can easily navigate, modify, and extract data from JSON trees.
- Jackson supports annotations, such as
@JsonProperty, offering a convenient way to customize the mapping between Java objects and JSON properties. This feature provides fine-grained control over the serialization and deserialization processes.