In Spring Boot + Spring Data JPA application, to support the JSR310 java.time.* APIs, we need to register this Jsr310JpaConverters manually.

import org.springframework.boot.autoconfigure.domain.EntityScan;
import org.springframework.data.jpa.convert.threeten.Jsr310JpaConverters;
@EntityScan(
        basePackageClasses = {Application.class, Jsr310JpaConverters.class}
@SpringBootApplication
public class Application {
	//...

P.S Tested with Spring Boot 1.5.1.RELEASE, Spring Data JPA 1.11.0.RELEASE

1. Full Example

1.1 A model contains a java.time.LocalDate field.

package com.mkyong.model;
import javax.persistence.*;
import java.time.LocalDate;
@Entity
public class Customer {
    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "CUST_SEQ")
    @SequenceGenerator(sequenceName = "customer_seq", allocationSize = 1, name = "CUST_SEQ")
    Long id;
    String name;
    @Column(name = "CREATED_DATE")
    LocalDate date;
	//...

1.2 @EntityScan to scan and register Jsr310JpaConverters like this :

package com.mkyong;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.domain.EntityScan;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.data.jpa.convert.threeten.Jsr310JpaConverters;
import java.util.Arrays;
//for jsr310 java 8 java.time.*
@EntityScan(
        basePackageClasses = {Application.class, Jsr310JpaConverters.class}
@SpringBootApplication
public class Application {
    public static void main(String[] args) throws Exception {
        SpringApplication.run(Application.class, args);
    @Bean
    public CommandLineRunner run(ApplicationContext appContext) {
        return args -> {
            System.out.println("hello World!");
        };

References

1. Jsr310JpaConverters JavaDoc
2. JSR 310: Date and Time API
3. Spring Data MongoDB + JSR-310 or Java 8 new Date APIs