feat : create Comment, Post, and User entities

src/main/java/umc/spring/post/data/entity/Comment.java

+package umc.spring.post.data.entity;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+
+import java.util.Date;
+
+@Entity
+@Getter @Setter
+public class Comment {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(nullable = false)
+    private Long id;
+
+    @Column(nullable = false)
+    private Long userId;
+
+    @Column(nullable = false)
+    private Long postId;
+
+    @Column(nullable = false)
+    private String author;
+
+    @Column(nullable = false)
+    private String text;
+
+    @ManyToOne(fetch=FetchType.EAGER)
+    @JoinColumn(name = "postId", nullable = false,insertable=false, updatable=false)
+    private Post post;
+
+    @Column(nullable = false)
+    private Date timestamp;
+
+}

src/main/java/umc/spring/post/data/entity/Post.java

-package com.umc.post.data.entity;
+package umc.spring.post.data.entity;
 
 import jakarta.persistence.*;
 import lombok.Getter;
 import lombok.Setter;
 
+import java.util.ArrayList;
 import java.util.Date;
+import java.util.List;
 
 @Entity
 @Table(name = "Post")
@@ -17,14 +19,31 @@ public class Post{
     private Long id;
 
     @Column(nullable = false)
-    private String title;
+    private Long userId;
 
     @Column(nullable = false)
-    private String author;
+    private String title;
 
     @Column(nullable = false)
     private String body;
 
     @Column(nullable = false)
-    private Date timestamp;
+    private String image;
+
+    @Column(nullable = false)
+    private int likeCount;
+
+    @Column(nullable = false)
+    private String author;
+
+    @Column(nullable = true)
+    private Date createdTime;
+
+    @Column(nullable = true)
+    private Date modifiedTime;
+
+    @OneToMany(mappedBy = "post", cascade = CascadeType.ALL,fetch = FetchType.EAGER,
+            orphanRemoval = true)
+    private List<Comment> comments = new ArrayList<>();
+
 }

src/main/java/umc/spring/post/data/entity/User.java

+package umc.spring.post.data.entity;
+
+import jakarta.persistence.*;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import org.springframework.security.core.GrantedAuthority;
+import org.springframework.security.core.authority.SimpleGrantedAuthority;
+import org.springframework.security.core.userdetails.UserDetails;
+import umc.spring.post.config.security.Role;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+//@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+@Entity
+@Data
+@Table(name="user")
+public class User implements UserDetails {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(nullable = false)
+    private Long id;
+
+    @Column(nullable = false)
+    private String userId;
+
+    @Column(nullable = false)
+    private String password;
+
+    @Column(nullable = false)
+    private String userName;
+
+    @Enumerated(EnumType.STRING)
+    private Role role = Role.USER;
+
+    @Override
+    public Collection<? extends GrantedAuthority> getAuthorities() {
+        Collection<GrantedAuthority> authorities = new ArrayList<>();
+        System.out.println("entity " + authorities);
+        authorities.add(new SimpleGrantedAuthority(role.toString()));
+        System.out.println("entity " + authorities);
+        return authorities;
+    }
+
+    @Override
+    public String getUsername() {
+        return this.userName;
+    }
+
+    @Override
+    public boolean isAccountNonExpired() {
+        return false;
+    }
+
+    @Override
+    public boolean isAccountNonLocked() {
+        return false;
+    }
+
+    @Override
+    public boolean isCredentialsNonExpired() {
+        return false;
+    }
+
+    @Override
+    public boolean isEnabled() {
+        return false;
+    }
+
+
+}