Merge pull request #18 from Soongsil-CoffeeChat/init/#17

init: Entities

src/main/java/com/soongsil/CoffeeChat/entity/Application.java

@@ -0,0 +1,35 @@
+package com.soongsil.CoffeeChat.entity;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+
+@Entity
+@Getter
+@Setter
+public class Application {
+    @Column(name = "application_id")
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @ManyToOne
+    @JoinColumn(name = "mentor_id")
+    private Mentor mentor;
+
+    @ManyToOne
+    @JoinColumn(name = "mentee_id")
+    private Mentee mentee;
+
+    @Column
+    private String date;
+
+    @Column
+    private String time;
+
+    @Column
+    private String question;
+
+    @Column
+    private boolean accept;
+}

src/main/java/com/soongsil/CoffeeChat/entity/Club.java

@@ -0,0 +1,25 @@
+package com.soongsil.CoffeeChat.entity;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+
+@Entity
+@Getter
+@Setter
+public class Club {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name="club_id")
+    private Long id;
+
+    @ManyToOne
+    @JoinColumn(name = "mentor_id")
+    private Mentor mentor;
+
+    @Column
+    private String name;
+
+    @Column
+    private String position;
+}

src/main/java/com/soongsil/CoffeeChat/entity/Mentee.java

@@ -0,0 +1,28 @@
+package com.soongsil.CoffeeChat.entity;
+
+import jakarta.persistence.CascadeType;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.OneToMany;
+import lombok.Getter;
+import lombok.Setter;
+
+import java.util.HashSet;
+import java.util.Set;
+
+@Entity
+@Getter
+@Setter
+public class Mentee extends User{
+    @Column(name = "phone_num")
+    private String phoneNum;
+
+    @Column
+    private String birth;
+
+    @Column
+    private String part;
+
+    @OneToMany(mappedBy = "mentee", cascade = CascadeType.ALL, orphanRemoval = true)
+    private Set<Application> applications = new HashSet<>();
+}

src/main/java/com/soongsil/CoffeeChat/entity/Mentor.java

@@ -0,0 +1,34 @@
+package com.soongsil.CoffeeChat.entity;
+
+import jakarta.persistence.CascadeType;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.OneToMany;
+import lombok.Getter;
+import lombok.Setter;
+
+import java.util.HashSet;
+import java.util.Set;
+
+@Entity
+@Getter
+@Setter
+public class Mentor extends User{
+    @Column
+    private int grade;
+
+    @Column
+    private String major;
+
+    @Column
+    private String memo;
+
+    @OneToMany(mappedBy = "mentor", cascade = CascadeType.ALL, orphanRemoval = true)
+    private Set<Application> applications = new HashSet<>();
+
+    @OneToMany(mappedBy = "mentor", cascade = CascadeType.ALL, orphanRemoval = true)
+    private Set<Club> clubs = new HashSet<>();
+
+    @OneToMany(mappedBy = "mentor", cascade = CascadeType.ALL, orphanRemoval = true)
+    private Set<PossibleDate> possibleDates = new HashSet<>();
+}

src/main/java/com/soongsil/CoffeeChat/entity/PossibleDate.java

@@ -0,0 +1,28 @@
+package com.soongsil.CoffeeChat.entity;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+
+@Entity
+@Getter
+@Setter
+public class PossibleDate {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "possible_date_id")
+    private Long id;
+
+    @ManyToOne
+    @JoinColumn(name = "mentor_id")
+    private Mentor mentor;
+
+    @Column
+    private String date;
+
+    @Column
+    private String time;
+
+    @Column
+    private boolean apply;
+}

src/main/java/com/soongsil/CoffeeChat/entity/Refresh.java

@@ -10,7 +10,7 @@
 @Entity
 @Getter
 @Setter
-public class Refresh {
+public class Refresh {  //사용 가능 Refresh토큰 DB저장용 
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;

src/main/java/com/soongsil/CoffeeChat/entity/User.java

@@ -7,9 +7,12 @@
 @Entity
 @Getter
 @Setter
+@Inheritance(strategy = InheritanceType.JOINED)  //자식 : Mentor, Mentee
+@DiscriminatorColumn // 하위 테이블의 구분 컬럼 생성(default = DTYPE)
 public class User {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "user_id")
     private Long id;
 
     @Column