JSON parse error Can not construct instance of java time LocalDate no String-argument constructor factory method to deserialize from String value

Question

I am new to Spring Data REST project and I am trying to create my first RESTful service  The task is simple  but I am stuck   I want to perform CRUD operations on a user data stored in an embedded database using RESTful API    But I cannot figure out how to make the Spring framework process the birthData as  1999-12-15  and store it as a LocalDate  The  JsonFormat annotation does not help   At present I get the error   HTTP 1 1 400  Content-Type  application hal json charset UTF-8 Transfer-Encoding  chunked Date  Thu  24 Aug 2017 13 36 51 GMT Connection  close    cause    cause  null  message   Can not construct instance of java time LocalDate   no String-argument constructor factory method to deserialize from String value   1999-10-10   n  at  Source  org apache catalina connector CoyoteInputStream 4ee2a60e   line  1  column  65   through reference chain  ru zavanton entities User   birthDate         message   JSON parse error  Can not construct instance of java time LocalDate   no String-argument constructor factory method to deserialize from String value   1999-10-10    nested exception is com fasterxml jackson databind JsonMappingException   Can not construct instance of java time LocalDate  no String-argument constructor factory method to deserialize from String value   1999-10-10   n  at  Source  org apache catalina connector CoyoteInputStream 4ee2a60e  line  1  column  65   through reference chain  ru zavanton entities User   birthDate         How to make it work  so that client calls like   curl -i -X POST -H  Content-Type application json  -d       firstName       John       lastName       Johnson      birthDate       1999-10-10      email       john example com      http   localhost 8080 users   will actually store the entity into the database   Below is the information about the classes   The user class    package ru zavanton entities    import com fasterxml jackson annotation JsonFormat   import javax persistence Entity  import javax persistence GeneratedValue  import javax persistence GenerationType  import javax persistence Id  import java time LocalDate    Entity public class User         Id      GeneratedValue strategy   GenerationType AUTO      private long id       private String firstName      private String lastName        JsonFormat shape   JsonFormat Shape STRING  pattern    yyyy-MM-dd       private LocalDate birthDate       private String email      private String password       public long getId             return id             public void setId long id            this id   id             public String getFirstName             return firstName             public void setFirstName String firstName            this firstName   firstName             public String getLastName             return lastName             public void setLastName String lastName            this lastName   lastName             public LocalDate getBirthDate             return birthDate             public void setBirthDate LocalDate birthDate            this birthDate   birthDate             public String getEmail             return email             public void setEmail String email            this email   email             public String getPassword             return password             public void setPassword String password            this password   password            The UserRepository class   package ru zavanton repositories   import org springframework data repository PagingAndSortingRepository  import org springframework data repository query Param  import org springframework data rest core annotation RepositoryRestResource  import ru zavanton entities User    RepositoryRestResource collectionResourceRel    users   path    users   public interface UserRepository extends PagingAndSortingRepository lt User  Long gt         User findByEmail  Param  email   String email        Application class   package ru zavanton   import org springframework boot SpringApplication  import org springframework boot autoconfigure SpringBootApplication    SpringBootApplication public class Application        public static void main String   args             SpringApplication run Application class  args

User · Answer

You need jackson dependency for this serialization and deserialization.

Add this dependency:

Gradle:

compile("com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.9.4")

Maven:

<dependency>
    <groupId>com.fasterxml.jackson.datatype</groupId>
    <artifactId>jackson-datatype-jsr310</artifactId>
</dependency>

After that, You need to tell Jackson ObjectMapper to use JavaTimeModule. To do that, Autowire ObjectMapper in the main class and register JavaTimeModule to it.

import javax.annotation.PostConstruct;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;

@SpringBootApplication
public class MockEmployeeApplication {

  @Autowired
  private ObjectMapper objectMapper;

  public static void main(String[] args) {
    SpringApplication.run(MockEmployeeApplication.class, args);

  }

  @PostConstruct
  public void setUp() {
    objectMapper.registerModule(new JavaTimeModule());
  }
}

After that, Your LocalDate and LocalDateTime should be serialized and deserialized correctly.

User · Answer

As it turns out  one should not forget to include jacson dependency into the pom file  This solved the issue for me    lt dependency gt       lt groupId gt com fasterxml jackson module lt  groupId gt       lt artifactId gt jackson-module-parameter-names lt  artifactId gt   lt  dependency gt   lt dependency gt       lt groupId gt com fasterxml jackson datatype lt  groupId gt       lt artifactId gt jackson-datatype-jdk8 lt  artifactId gt   lt  dependency gt   lt dependency gt       lt groupId gt com fasterxml jackson datatype lt  groupId gt       lt artifactId gt jackson-datatype-jsr310 lt  artifactId gt   lt  dependency gt

User · Answer

Well  what I do on every project is a mix of the options above   First  add the jsr310 dependency    lt dependency gt       lt groupId gt com fasterxml jackson datatype lt  groupId gt       lt artifactId gt jackson-datatype-jsr310 lt  artifactId gt   lt  dependency gt    Important detail  put this dependency on the top of your depedencies list  I already see a project where the Localdate error persists even with this dependency on the pom xml  But changing the order of the depedency the error was gone   On your  src main resources application yml file  setup the write-dates-as-timestamps property   spring    jackson      serialization        write-dates-as-timestamps  false   And create a ObjectMapper bean as this    Configuration public class WebConfigurer         Bean      Primary     public ObjectMapper objectMapper Jackson2ObjectMapperBuilder builder            ObjectMapper objectMapper   builder build            objectMapper configure SerializationFeature WRITE DATES AS TIMESTAMPS  false           return objectMapper             Following this configuration  the conversion always work on Spring Boot 1 5 x without any error   Bonus  Spring AMQP Queue configuration  Working with Spring AMQP  pay attention if you have a new instance of Jackson2JsonMessageConverter  common thing when creating a SimpleRabbitListenerContainerFactory   You need to pass the ObjectMapper bean to it  like   Jackson2JsonMessageConverter converter   new Jackson2JsonMessageConverter objectMapper     Otherwise  you will receive the same error

User · Answer

Spring Boot 2 2 2   Gradle   Gradle  build gradle    implementation  com fasterxml jackson datatype jackson-datatype-jsr310     Entity  User class    LocalDate dateOfBirth    Code   ObjectMapper mapper   new ObjectMapper    mapper registerModule new JavaTimeModule     User user   mapper readValue json  User class

User · Answer

I have just wrestled with this for 3 hours  I credit the answer from Dherik  Bonus material about AMQP  for bringing me within striking distance of MY answer  YMMV  I registered the JavaTimeModule in my object mapper in my SpringBootApplication like this   Bean  Primary public ObjectMapper objectMapper Jackson2ObjectMapperBuilder builder        ObjectMapper objectMapper   builder build        objectMapper registerModule new JavaTimeModule         return objectMapper     However my Instants that were coming over the STOMP connection were still not deserialising  Then I realised I had inadvertantly created a MappingJackson2MessageConverter which creates a second ObjectMapper  So I guess the moral of the story is  Are you sure you have adjusted all your ObjectMappers  In my case I replaced the MappingJackson2MessageConverter objectMapper with the outer version that has the JavaTimeModule registered  and all is well   Autowired ObjectMapper objectMapper    Bean public WebSocketStompClient webSocketStompClient WebSocketClient webSocketClient          StompSessionHandler stompSessionHandler        WebSocketStompClient webSocketStompClient   new WebSocketStompClient webSocketClient       MappingJackson2MessageConverter converter   new MappingJackson2MessageConverter        converter setObjectMapper objectMapper       webSocketStompClient setMessageConverter converter       webSocketStompClient connect  quot http   localhost 8080 myapp quot   stompSessionHandler       return webSocketStompClient

User · Answer

I had a similar issue which i solved by making two changes   added below entry in application yaml file   spring    jackson      serialization write dates as timestamps  false add below two annotations in pojo     JsonDeserialize using   LocalDateDeserializer class   JsonSerialize using   LocalDateSerializer class    sample example   import com fasterxml jackson databind annotation JsonDeserialize   import com fasterxml jackson databind annotation JsonSerialize   public class Customer            your fields           JsonDeserialize using   LocalDateDeserializer class        JsonSerialize using   LocalDateSerializer class       protected LocalDate birthdate      then the following json requests worked for me   sample request format as string           birthdate    2019-11-28       sample request format as array           birthdate   2019 11 18      Hope it helps

[json] JSON parse error: Can not construct instance of java.time.LocalDate: no String-argument constructor/factory method to deserialize from String value

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