jackson-modules-java8 VS Jackson

Ah I forgot you have to explicitly register the JavaTimeModule, did you do that when creating the object mapper? See https://github.com/FasterXML/jackson-modules-java8

Here's the source code. It uses the ISO-88601 format without timezone modifier, e.g. "2021-10-25T00:23:12" – or in other words the same format as LocalDateTime.toString().

Let's say you have a REST API that returns customers. The service layer would talk to repository layer which would talk to the entity layer to ultimately get the Customer object. It makes the most sense just to return Optional to the controller, and using a certain serialization module, the Optional would automatically get translated to JSON.

To put things simply, this method findAllStreaming() takes an OutputStream to write the whole json response into. To write json into the stream chunk by chunk we are using JsonGenerator. JsonGenerator is provided by Jackson-Core. More detailed about how to write stream event is covered in this blog post by the author of the library.

So do XML and JSON.

Jackson already has some improvements for string-to-number conversion over stock JDK parser (https://github.com/FasterXML/jackson-core/pull/677). Would be great if they added faster number-to-string too.

🐞 Report issues here if you find any