Jackson JSON Tutorial
Last modified: December 7, 2018
This tutorial illustrates the most common Jackson 2 tasks, problems and solutions while marshalling and unmarshalling JSON.
Basic Jackson Marshalling
Learn quickly how to serialize a Java Entity to a JSON String - and control the mapping process perfectly, to reach the exact JSON format you're aiming for.
>> Jackson Annotation Examples (popular)
>> Jackson Ignore Properties on Marshalling
>> Ignore Null Fields with Jackson
>> Change Name of Field
>> Intro to the Jackson ObjectMapper (popular)
>> XML Serialization and Deserialization with Jackson
>> JSON in Java
>> Jackson – Marshall String to JsonNode
>> Using Optional with Jackson
Basic Jackson Unmarshalling
Learn how to deserialize a JSON String into a Java Entity - no matter how weird the JSON input is, we need to map it to a well defined Java Entity class.
Advanced Jackson Marshalling
Learn advanced serialization configuration and tuning to deal with conditions, various data types and custom Jackson exceptions.
>> Serialize Only Fields that meet a Custom Criteria with Jackson
>> Serialize Enums as JSON Objects
>> JsonMappingException (No serializer found for class)
>> Jackson – Custom Serializer
>> Jackson Date
>> Jackson JSON Views
>> Jackson Exceptions – Problems and Solutions
>> Jackson – Working with Maps and nulls
Advanced Jackson Unmarshalling
Learn more advanced tips and tricks for unmarshalling JSON input into Java Entity classes.
Advanced Jackson Usage
>> Jackson – Bidirectional Relationships
>> Jackson – Decide What Fields Get Serialized/Deserialized
>> Working with Tree Model Nodes in Jackson
>> More Jackson Annotations
>> Inheritance with Jackson
>> Mapping Nested Values with Jackson
>> Map Serialization and Deserialization with Jackson
>> Guide to @JsonFormat in Jackson
The implementation of all these examples and code snippets can be found in my GitHub project – this is an Eclipse based project, so it should be easy to import and run as it is.
How about Streaming with Jackson API. Can you show an example of extracting an array from JSON format: { “type”: “FeatureCollection”, “crs”: { “type”: “name”, “properties”: { “name”: “urn:ogc:def:crs:OGC:1.3:CRS84” } }, “features”: [ { “type”: “Feature”, “geometry”: { “type”: “MultiPolygon”, “coordinates”: [ [ [ [ -69.996937628999916, 12.577582098000036 ], [ -69.936390753999945, 12.531724351000051 ], [ -69.924672003999945, 12.519232489000046 ], [ -69.915760870999918, 12.497015692000076 ], [ -69.880197719999842, 12.453558661000045 ], [ -69.876820441999939, 12.427394924000097 ], [ -69.888091600999928, 12.417669989000046 ], [ -69.908802863999938, 12.417792059000107 ], [ -69.930531378999888, 12.425970770000035 ], [ -69.945139126999919, 12.44037506700009 ], [ -69.924672003999945, 12.44037506700009 ], [ -69.924672003999945, 12.447211005000014 ], [ -69.958566860999923, 12.463202216000099 ], [ -70.027658657999922, 12.522935289000088 ],… Read more »
Hey Tariq,
That might be an interesting topic for an article. My suggestion – if you need to have a quicker answer – have a proper test that can be used to reproduce what you’re trying to achieve – and email me the details. I’d be happy to have a look. Cheers,
Eugen.
Hi Eugen, I have been trying to code a servlet for a while that binds remote mysql to a jquery grid, with no success. Is there any chance you might have a look, the JSON string generates but the binding fails in the xhtml view.