Spring Rest Controller handling java.util.Optional using Jackson -

i have got spring restcontroller classes handle rest services using json. json using jackson. there fields of java.util.optional type

 private optional<long> start = optional.empty(); 

to enable handling of optional type, configuring spring follows

 <bean id="objectmapper"  class="org.springframework.http.converter.json.jackson2objectmapperfactorybean">     <property name="modulestoinstall" value="com.fasterxml.jackson.datatype.jdk8.jdk8module" />    </bean> 

however when call webservice, fails in deserializing optional types following message

org.springframework.http.converter.httpmessagenotreadableexception:     not read json: can not instantiate value of type     [simple type, class java.util.optional<java.lang.long>]     long integral number (3424323423432); no     single-long-arg constructor/factory method 

doing serialization/deserialization stand alone code works fine. there register module directly using following code

    objectmapper m = new objectmapper();     m.registermodule(new jdk8module()); 

versions using:

spring : 4.1.5.release

jackson: 2.5.1

thanks in advance

i figure out this. solution register object mapper message converter follows

<mvc:annotation-driven>     <mvc:message-converters>         <bean             class="org.springframework.http.converter.json.mappingjackson2httpmessageconverter">             <property name="objectmapper" ref="objectmapper" />         </bean>     </mvc:message-converters> </mvc:annotation-driven>  <bean id="objectmapper" class="org.springframework.http.converter.json.jackson2objectmapperfactorybean">     <property name="modulestoinstall"         value="com.fasterxml.jackson.datatype.jdk8.jdk8module" /> </bean>