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Jackson
Spring offers support for the Jackson JSON library.
Jackson-based JSON MVC Views
The MappingJackson2JsonView
uses the Jackson library’s ObjectMapper
to render the response
content as JSON. By default, the entire contents of the model map (with the exception of
framework-specific classes) are encoded as JSON. For cases where the contents of the
map need to be filtered, you can specify a specific set of model attributes to encode
by using the modelKeys
property. You can also use the extractValueFromSingleKeyModel
property to have the value in single-key models extracted and serialized directly rather
than as a map of model attributes.
You can customize JSON mapping as needed by using Jackson’s provided
annotations. When you need further control, you can inject a custom ObjectMapper
through the ObjectMapper
property, for cases where you need to provide custom JSON
serializers and deserializers for specific types.
Jackson-based XML Views
MappingJackson2XmlView
uses the
Jackson XML extension’s XmlMapper
to render the response content as XML. If the model contains multiple entries, you should
explicitly set the object to be serialized by using the modelKey
bean property. If the
model contains a single entry, it is serialized automatically.
You can customize XML mapping as needed by using JAXB or Jackson’s provided
annotations. When you need further control, you can inject a custom XmlMapper
through the ObjectMapper
property, for cases where custom XML
you need to provide serializers and deserializers for specific types.