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javajsonjacksonfasterxml

Convert String to Integer using FasterXML Jackson

I'm consuming two JSONs.

The first one has the ID as a String.

"details": {
    "id": "316.0"
}

The other one has the ID as Integer.

"details": {
    "detailId": 316
}

Both JSONs are being mapped with FasterXML to two different classes. I want both ids to be Integer. For now they are String.

How can I force ForceXML to convert "316.0" to Integer so I can compare both attributes easily?

Solution

  • Jackson actually handles coercion, so that if property has type int or java.lang.Integer, it will parse JSON Strings, not just use JSON Numbers. Reverse is possible as well, using @JsonFormat(shape=Shape.STRING) for numeric fields.