gistfile1.java

package eat.me;

import com.fasterxml.jackson.annotation.JsonSetter;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

public class JacksonTest {
    private static final String EXAMPLE = "{\"email\": {\"addr\":\"e@example.com\"}}";

    public static void main(String[] args) throws Exception {
        ObjectMapper mapper = new ObjectMapper();
        Foo foo = mapper.readValue(EXAMPLE,Foo.class);
        System.out.println(foo.email); //e@examle.com

    }

    private static class Foo {
        String email;

        @JsonSetter("email")
        private void setEmail(JsonNode node) {
            email = node.path("addr").asText();
        }
    }

}