java - Spring Boot Jackson mappings are not working -

i using fasterxml jackson json serialization. have written date serializer

public class dateobjectserializer extends jsonserializer<date> {     public static final string date_format = "dd.mm.yyyy";      @override     public void serialize(date date, jsongenerator jgen, serializerprovider provider) throws ioexception, jsonprocessingexception {         system.out.println("from dateobjectserializer");         simpledateformat dateformat = new simpledateformat(date_format);         string formatteddate = dateformat.format(date);         jgen.writestring(formatteddate);     } } 

but not being invoked. other jackson serializers working fine.

so added following configuration in application.yaml

spring:   jackson:     serialization-inclusion: non_null     date-format: dd.mm.yyyy 

but din't work.

so have added code in springbootconfiguration class.

@override public void configuremessageconverters(list<httpmessageconverter<?>> converters) {     final mappingjackson2httpmessageconverter converter = new mappingjackson2httpmessageconverter();     final objectmapper objectmapper = new objectmapper();     simpledateformat dateformat = new simpledateformat(date_format);     objectmapper.configure(serializationfeature.write_dates_as_timestamps, false).setdateformat(dateformat);     converter.setobjectmapper(objectmapper);     converters.add(converter);     super.configuremessageconverters(converters); } 

now dates being serialized correctly. valid json equivalent strings not being transformed json mentioned here.

@restcontroller public class samplecontroller {      @requestmapping(value = "/jsoninfo", method = requestmethod.get, produces = application_json_value)     public string jsoninfo() {         string string = "{\"name\": \"foo\"}"                 return string;     } } 

try this

import com.fasterxml.jackson.databind.objectmapper;  :  @autowired private objectmapper objectmapper;  @restcontroller public class samplecontroller {      @requestmapping(value = "/jsoninfo", method = requestmethod.get, produces = application_json_value)     public jsonnode jsoninfo()  throws jsonprocessingexception, ioexception {         string string = "{\"name\": \"foo\"}"                 return objectmapper.readtree(string);     } }