package com.sakamichi46.model;

import java.util.Date;
import lombok.Getter;
import lombok.Setter;

/**
 *
 * @author kikuta
 */
@Getter @Setter
public class Member {
    private String name;
    private Date birthday;
    private String bloodType;
    private String constellation;
    private String profilePhotoUri;
    private String blogUri;
}

package com.sakamichi46.model;

import com.fasterxml.jackson.annotation.JsonFormat;
import java.util.Date;
import lombok.Getter;
import lombok.Setter;

/**
 *
 * @author kikuta
 */
@Getter @Setter
public class Member {
    private String name;
    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd")
    private Date birthday;
    private String bloodType;
    private String constellation;
    private String profilePhotoUri;
    private String blogUri;
}

Modify date format of json