Baeldung has posted a tutorial on Jackson, describing how to map JSON property names in “snake case” - i.e., first_name - to “camel case,” or firstName. There are a few different ways to address such naming conversions, ranging from modifying the entity at the field level, or class level, or even configuring the Jackson ObjectMapper class.

As with most Baeldung offerings like this, it’s very short, very to-the-point, and covers a lot of ground without a lot of description, which is generally what you want for something like this.