writeValue() method can perform JSON serialization operations, which can convert Java objects into JSON strings.readValue() method can perform JSON deserialization operations, such as converting strings, file streams, byte streams, byte arrays, and other common content into Java objects.There are some common methods in this class. If you have used FastJson, then ObjectMapper in Jackson is like the JSON class in FastJson. ObjectMapper is one of the most commonly used classes in the Jackson library for fast conversion between Java objects and JSON strings. junit-jupiter 5.8.2 test org.projectlombok lombok 1.18.22 When using Jackson, in most cases we just need to add the jackson-databind dependency to use the Jackson functionality, which depends on the following two packages. Thanks to Jackson’s highly extensible design, there are many common text formats and tools that have adaptations for Jackson, such as CSV, XML, YAML, etc. Databind in the jackson-databind module, implements databinding on top of the Streaming package, relying on Streaming and Annotations packages.Annotations in the jackson-annotations module, contains annotations in Jackson.Defines a number of APIs related to stream processing and specific JSON implementations. Jackson has three core packages, namely Streaming, Databid, Annotations, through which you can easily operate on JSON. Jackson and FastJson as well, is a Java language written for JSON processing open source tool library, Jackson is very widely used, Spring Framework default use Jackson for JSON processing.
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