ObjectMapper vs. JSONUtil: Jackson vs. FastJSON for JSON Serialization

ObjectMapper is a class provided by the Jackson library used to serialize Java objects into JSON format or deserialize JSON into Java objects. It allows customization of serialization and deserialization rules and offers convenient methods for manipulating JSON data.

JSONUtil is a class provided by the FastJSON library, also used for serializing Java objects into JSON and deserializing JSON into Java objects. It similarly allows customization of serialization and deserialization rules and offers convenient methods for manipulating JSON data.

The main difference between the two lies in the libraries they belong to. Jackson and FastJSON libraries offer slightly different performance and features. The choice between them should be based on your specific needs and application context.