Deserializing non-string map keys with Jackson

Question

I have a a map that looks like this:

public class VerbResult {
    @JsonProperty(\"similarVerbs\")
    private Map> similarVerbs         


        

Answer 1

Building on the answer given here that suggests to implement a Module with a deserializer. The JodaTime Module is an easy to understand full example of a module containing serializers and deserializers.

Please note that the Module feature was introduced in Jackson version 1.7 so you might need to upgrade.

So step by step:

1. create a module containing a (de)serializer for your class based on the Joda example
2. register that module with mapper.registerModule(module);

and you'll be all set