JSON example with Jersey + Jackson
This article shows how to return a JSON response in the Jersey application, using Jackson 2.x. Tested with: Jersey 3.0.2, Grizzly 3 HTTP Server, Jackson 2.12.2 , Java 11, Maven,…
Illegal to inject a message body into a singleton into public org.codehaus.jackson.jaxrs.JacksonJsonProvider
Using Jackson as JSON provider in RESTEasy. With RESTEasy auto scanning enabled. When starting up, it hits following errors and failed to start up any of the RESTEasy services: Illegal…
JSON example with RESTEasy + Jackson
Many like Jackson JSON processor, and it supported in RESTEasy. In this tutorial, we show you how to convert an object to JSON format and return it back to the…
Jackson – How to enable pretty print JSON output
In Jackson, we can use writerWithDefaultPrettyPrinter() to pretty print the JSON output. Tested with Jackson 2.9.8 1. Pretty Print JSON 1.1 By default, Jackson print in compact format: Output 1.2…
Jackson – Streaming Model examples
This Jackson tutorial show you how to use JsonGenerator to write JSON string and JSON array into a file, furthermore, read it with JsonParser. Jackson Streaming APIs: JsonGenerator – Write…
Jackson – Tree Model examples
In Jackson, we can use Tree Model to represent the JSON structure, and perform the CRUD operations via JsonNode, similar to the XML DOM tree. This Jackson Tree Model is…
Jackson – Convert JSON string to Map
In Jackson, we can use mapper.readValue(json, Map.class) to convert a JSON string to a Map
Jackson – Convert JSON array string to List
Few Jackson examples to convert a JSON array string to a List.
Jackson @JsonView examples
In Jackson, we can use @JsonView to limit or control fields display for different users. Puts @JsonView on field level to limit fields display for different views. Below example, show…
Jackson – How to ignore null fields
In Jackson, we can use @JsonInclude(JsonInclude.Include.NON_NULL) to ignore the null fields. To ignore the null fields, put @JsonInclude on class level or field level. Alternatively, we also can configure to…