diff --git a/src/main/java/com/lk/paopao/dto/CommentContentDto.java b/src/main/java/com/lk/paopao/dto/CommentContentDto.java
new file mode 100644
index 0000000..61c15bc
--- /dev/null
+++ b/src/main/java/com/lk/paopao/dto/CommentContentDto.java
@@ -0,0 +1,21 @@
+package com.lk.paopao.dto;
+
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import lombok.Value;
+
+import java.io.Serializable;
+
+/**
+ * DTO for {@link com.lk.paopao.entity.CommentContent}
+ */
+@Value
+public class CommentContentDto implements Serializable {
+    Long id;
+    String content;
+    Byte type;
+    Integer sort;
+    @JsonSerialize(using = MillisecondToSecondSerializer.class)
+    Long createdOn;
+    @JsonSerialize(using = MillisecondToSecondSerializer.class)
+    Long modifiedOn;
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/dto/CommentDto.java b/src/main/java/com/lk/paopao/dto/CommentDto.java
new file mode 100644
index 0000000..e2e0219
--- /dev/null
+++ b/src/main/java/com/lk/paopao/dto/CommentDto.java
@@ -0,0 +1,29 @@
+package com.lk.paopao.dto;
+
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import lombok.Value;
+
+import java.io.Serializable;
+import java.util.List;
+
+/**
+ * DTO for {@link com.lk.paopao.entity.Comment}
+ */
+@Value
+public class CommentDto implements Serializable {
+    Long id;
+    Long userId;
+    Long postId;
+    String ip;
+    String ipLoc;
+    Boolean isEssence;
+    Integer replyCount;
+    Integer thumbsUpCount;
+    Integer thumbsDownCount;
+    @JsonSerialize(using = MillisecondToSecondSerializer.class)
+    Long createdOn;
+    @JsonSerialize(using = MillisecondToSecondSerializer.class)
+    Long modifiedOn;
+    UserDto user;
+    List<CommentContentDto> contents;
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/dto/CommentReplyDto.java b/src/main/java/com/lk/paopao/dto/CommentReplyDto.java
new file mode 100644
index 0000000..9c586cd
--- /dev/null
+++ b/src/main/java/com/lk/paopao/dto/CommentReplyDto.java
@@ -0,0 +1,27 @@
+package com.lk.paopao.dto;
+
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import lombok.Value;
+
+@Value
+public class CommentReplyDto {
+
+    Long id;
+    @JsonSerialize(using = MillisecondToSecondSerializer.class)
+    Long createdOn;
+    @JsonSerialize(using = MillisecondToSecondSerializer.class)
+    Long modifiedOn;
+
+    Long commentId;
+
+    UserDto user;
+
+    String content;
+
+    String ip;
+
+    String ipLoc;
+
+    Integer thumbsUpCount;
+    Integer thumbsDownCount;
+}
diff --git a/src/main/java/com/lk/paopao/dto/MillisecondToSecondSerializer.java b/src/main/java/com/lk/paopao/dto/MillisecondToSecondSerializer.java
new file mode 100644
index 0000000..90cf054
--- /dev/null
+++ b/src/main/java/com/lk/paopao/dto/MillisecondToSecondSerializer.java
@@ -0,0 +1,34 @@
+package com.lk.paopao.dto;
+
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.JsonSerializer;
+import com.fasterxml.jackson.databind.SerializerProvider;
+
+import java.io.IOException;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * 将毫秒转换为秒的Json序列化器。
+ * 此序列化器将数值类型的毫秒数转换为对应的秒数进行JSON序列化。
+ */
+public class MillisecondToSecondSerializer extends JsonSerializer<Number> {
+
+    /**
+     * 序列化方法，将输入的毫秒数转换为秒数后写入JSON生成器。
+     *
+     * @param value 需要序列化的毫秒数，类型为Number。
+     * @param gen JSON生成器，用于输出序列化后的结果。
+     * @param serializers 序列化提供者，提供序列化过程所需的额外服务。
+     * @throws IOException 如果在序列化过程中发生IO异常。
+     */
+    @Override
+    public void serialize(Number value, JsonGenerator gen, SerializerProvider serializers) throws IOException {
+        if (value != null) {
+            // 将输入的毫秒数转换为秒数
+            long microseconds = value.longValue();
+            long seconds = TimeUnit.MILLISECONDS.toSeconds(microseconds);
+            // 将转换后的秒数写入JSON生成器
+            gen.writeNumber(seconds);
+        }
+    }
+}
diff --git a/src/main/java/com/lk/paopao/dto/PostCollectionDto.java b/src/main/java/com/lk/paopao/dto/PostCollectionDto.java
new file mode 100644
index 0000000..ffc41ba
--- /dev/null
+++ b/src/main/java/com/lk/paopao/dto/PostCollectionDto.java
@@ -0,0 +1,16 @@
+package com.lk.paopao.dto;
+
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import lombok.Value;
+
+@Value
+public class PostCollectionDto {
+
+    Long id;
+    PostDto post;
+    UserDto user;
+    @JsonSerialize(using = MillisecondToSecondSerializer.class)
+    Long createdOn;
+    @JsonSerialize(using = MillisecondToSecondSerializer.class)
+    Long modifiedOn;
+}
diff --git a/src/main/java/com/lk/paopao/dto/PostContentDto.java b/src/main/java/com/lk/paopao/dto/PostContentDto.java
new file mode 100644
index 0000000..f32f246
--- /dev/null
+++ b/src/main/java/com/lk/paopao/dto/PostContentDto.java
@@ -0,0 +1,22 @@
+package com.lk.paopao.dto;
+
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import lombok.Value;
+
+import java.io.Serializable;
+
+/**
+ * DTO for {@link com.lk.paopao.entity.PostContent}
+ */
+@Value
+public class PostContentDto implements Serializable {
+    Long id;
+    Long postId;
+    String content;
+    Byte type;
+    Integer sort;
+    @JsonSerialize(using = MillisecondToSecondSerializer.class)
+    Long createdOn;
+    @JsonSerialize(using = MillisecondToSecondSerializer.class)
+    Long modifiedOn;
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/dto/PostDto.java b/src/main/java/com/lk/paopao/dto/PostDto.java
new file mode 100644
index 0000000..b901b41
--- /dev/null
+++ b/src/main/java/com/lk/paopao/dto/PostDto.java
@@ -0,0 +1,37 @@
+package com.lk.paopao.dto;
+
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import lombok.Value;
+
+import java.io.Serializable;
+import java.util.List;
+
+/**
+ * DTO for {@link com.lk.paopao.entity.Post}
+ */
+@Value
+public class PostDto implements Serializable {
+    Long id;
+    Long userId;
+    Long commentCount;
+    Long collectionCount;
+    Long upvoteCount;
+    Long shareCount;
+    Byte visibility;
+    Boolean isTop;
+    Boolean isEssence;
+    Boolean isLock;
+    Long latestRepliedOn;
+    String tags;
+    Long attachmentPrice;
+    String ip;
+    String ipLoc;
+    @JsonSerialize(using = MillisecondToSecondSerializer.class)
+    Long createdOn;
+    @JsonSerialize(using = MillisecondToSecondSerializer.class)
+    Long modifiedOn;
+    Long deletedOn;
+    Byte isDel;
+    UserDto user;
+    List<PostContentDto> contents;
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/dto/PostStarDto.java b/src/main/java/com/lk/paopao/dto/PostStarDto.java
new file mode 100644
index 0000000..4238995
--- /dev/null
+++ b/src/main/java/com/lk/paopao/dto/PostStarDto.java
@@ -0,0 +1,15 @@
+package com.lk.paopao.dto;
+
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import lombok.Value;
+
+@Value
+public class PostStarDto {
+    Long id;
+    PostDto post;
+    UserDto user;
+    @JsonSerialize(using = MillisecondToSecondSerializer.class)
+    Long createdOn;
+    @JsonSerialize(using = MillisecondToSecondSerializer.class)
+    Long modifiedOn;
+}
diff --git a/src/main/java/com/lk/paopao/dto/TagDto.java b/src/main/java/com/lk/paopao/dto/TagDto.java
new file mode 100644
index 0000000..25fa6ac
--- /dev/null
+++ b/src/main/java/com/lk/paopao/dto/TagDto.java
@@ -0,0 +1,19 @@
+package com.lk.paopao.dto;
+
+import lombok.Value;
+
+import java.io.Serializable;
+
+/**
+ * DTO for {@link com.lk.paopao.entity.Tag}
+ */
+@Value
+public class TagDto implements Serializable {
+    Long id;
+    Long userId;
+    UserDto user;
+    String tag;
+    Long quoteNum;
+    Long createdOn;
+    Long modifiedOn;
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/dto/rest/request/ContentInPostRequest.java b/src/main/java/com/lk/paopao/dto/rest/request/ContentInPostRequest.java
new file mode 100644
index 0000000..e0e986a
--- /dev/null
+++ b/src/main/java/com/lk/paopao/dto/rest/request/ContentInPostRequest.java
@@ -0,0 +1,12 @@
+package com.lk.paopao.dto.rest.request;
+
+import lombok.Getter;
+import lombok.Setter;
+
+@Setter
+@Getter
+public class ContentInPostRequest {
+    private String content;
+    private Integer sort;
+    private Byte type;
+}
diff --git a/src/main/java/com/lk/paopao/dto/rest/request/PostRequest.java b/src/main/java/com/lk/paopao/dto/rest/request/PostRequest.java
new file mode 100644
index 0000000..e58be93
--- /dev/null
+++ b/src/main/java/com/lk/paopao/dto/rest/request/PostRequest.java
@@ -0,0 +1,20 @@
+package com.lk.paopao.dto.rest.request;
+
+import lombok.Getter;
+import lombok.Setter;
+
+import java.util.List;
+
+@Setter
+@Getter
+public class PostRequest {
+    private Long attachmentPrice;
+    private Byte visibility;
+    //帖子内容列表
+    List<ContentInPostRequest> contents;
+    // #标签列表
+    List<String> tags;
+    // @用户列表
+    List<String> users;
+
+}
diff --git a/src/main/java/com/lk/paopao/dto/rest/response/Paged.java b/src/main/java/com/lk/paopao/dto/rest/response/Paged.java
new file mode 100644
index 0000000..e7ceb85
--- /dev/null
+++ b/src/main/java/com/lk/paopao/dto/rest/response/Paged.java
@@ -0,0 +1,35 @@
+package com.lk.paopao.dto.rest.response;
+
+import lombok.Getter;
+
+import java.io.Serializable;
+import java.util.List;
+
+/**
+ * @description 分页数据
+ * @param <T>
+ */
+@Getter
+public class Paged<T> implements Serializable {
+
+    List<T> list;
+    Pager pager;
+
+    public Paged(List<T> list, Long totalRows, Integer page, Integer pageSize){
+        this.list = list;
+        pager = new Pager(page, pageSize, totalRows);
+   }
+
+   @Getter
+   public class Pager implements Serializable{
+         Integer page;
+         Integer pageSize;
+         Long totalRows;
+
+         public Pager(Integer page, Integer pageSize, Long  totalRows){
+             this.page = page;
+             this.pageSize = pageSize;
+             this.totalRows = totalRows;
+         }
+   }
+}
diff --git a/src/main/java/com/lk/paopao/entity/BaseAuditingEntity.java b/src/main/java/com/lk/paopao/entity/BaseAuditingEntity.java
new file mode 100644
index 0000000..3af306e
--- /dev/null
+++ b/src/main/java/com/lk/paopao/entity/BaseAuditingEntity.java
@@ -0,0 +1,43 @@
+package com.lk.paopao.entity;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import org.hibernate.annotations.Comment;
+import org.springframework.data.annotation.CreatedDate;
+import org.springframework.data.annotation.LastModifiedDate;
+import org.springframework.data.jpa.domain.support.AuditingEntityListener;
+
+import java.io.Serializable;
+
+@Getter
+@Setter
+@MappedSuperclass
+@EntityListeners(AuditingEntityListener.class)
+public abstract class BaseAuditingEntity implements Serializable {
+
+    // 主键ID
+    @Comment("ID")
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Comment("创建时间")
+    @Column(name = "created_on", nullable = false)
+    @CreatedDate
+    private Long createdOn;
+
+    @Comment("修改时间")
+    @LastModifiedDate
+    @Column(name = "modified_on", nullable = false)
+    private Long modifiedOn;
+
+    @Comment("删除时间")
+    @Column(name = "deleted_on")
+    private Long deletedOn;
+
+    @Comment("是否删除 0 为未删除、1 为已删除")
+    @Column(name = "is_del")
+    private byte isDel = 0;
+
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/entity/Comment.java b/src/main/java/com/lk/paopao/entity/Comment.java
new file mode 100644
index 0000000..6aaf595
--- /dev/null
+++ b/src/main/java/com/lk/paopao/entity/Comment.java
@@ -0,0 +1,66 @@
+package com.lk.paopao.entity;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import org.hibernate.annotations.ColumnDefault;
+import org.springframework.data.jpa.domain.support.AuditingEntityListener;
+
+import java.util.List;
+
+@Getter
+@Setter
+@org.hibernate.annotations.Comment("评论")
+@Entity
+@Table(name = "p_comment", indexes = {
+        @Index(name = "idx_comment_post_id", columnList = "post_id"),
+        @Index(name = "idx_comment_user_id", columnList = "user_id")
+})
+@EntityListeners(AuditingEntityListener.class)
+public class Comment extends BaseAuditingEntity{
+
+    @Version
+    private Long version;
+
+    @org.hibernate.annotations.Comment("POST ID")
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "post_id", nullable = false)
+    private Post post;
+
+    @org.hibernate.annotations.Comment("用户ID")
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "user_id", nullable = false)
+    private User user;
+
+    @OneToMany(cascade = CascadeType.PERSIST, fetch = FetchType.LAZY,mappedBy = "comment")
+    private List<CommentContent> contents;
+
+    @org.hibernate.annotations.Comment("IP地址")
+    @Column(name = "ip", length = 15)
+    private String ip;
+
+    @org.hibernate.annotations.Comment("IP城市地址")
+    @Column(name = "ip_loc", length = 64)
+    private String ipLoc;
+
+    @org.hibernate.annotations.Comment("是否精选")
+    @ColumnDefault("0")
+    @Column(name = "is_essence", nullable = false)
+    private Boolean isEssence = false;
+
+    @org.hibernate.annotations.Comment("回复数")
+    @ColumnDefault("0")
+    @Column(name = "reply_count", nullable = false)
+    private Integer replyCount = 0;
+
+    @org.hibernate.annotations.Comment("点赞数")
+    @ColumnDefault("0")
+    @Column(name = "thumbs_up_count", nullable = false)
+    private Integer thumbsUpCount = 0;
+
+    @org.hibernate.annotations.Comment("点踩数")
+    @ColumnDefault("0")
+    @Column(name = "thumbs_down_count", nullable = false)
+    private Integer thumbsDownCount = 0;
+
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/entity/CommentContent.java b/src/main/java/com/lk/paopao/entity/CommentContent.java
new file mode 100644
index 0000000..a357cde
--- /dev/null
+++ b/src/main/java/com/lk/paopao/entity/CommentContent.java
@@ -0,0 +1,49 @@
+package com.lk.paopao.entity;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import org.hibernate.annotations.ColumnDefault;
+import org.hibernate.annotations.Comment;
+import org.springframework.data.annotation.CreatedDate;
+import org.springframework.data.annotation.LastModifiedDate;
+import org.springframework.data.jpa.domain.support.AuditingEntityListener;
+
+@Getter
+@Setter
+@Comment("评论内容")
+@Entity
+@Table(name = "p_comment_content", indexes = {
+        @Index(name = "idx_comment_content_comment_id", columnList = "comment_id"),
+        @Index(name = "idx_comment_content_user_id", columnList = "user_id"),
+        @Index(name = "idx_comment_content_type", columnList = "type"),
+        @Index(name = "idx_comment_content_sort", columnList = "sort")
+})
+@EntityListeners(AuditingEntityListener.class)
+public class CommentContent extends BaseAuditingEntity{
+
+    @Comment("评论ID")
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "comment_id")
+    private com.lk.paopao.entity.Comment comment;
+
+    @Comment("用户ID")
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "user_id")
+    private User user;
+
+    @Comment("内容")
+    @ColumnDefault("")
+    @Column(name = "content", nullable = false, length = 4000)
+    private String content;
+
+    @Comment("类型，1标题，2文字段落，3图片地址，4视频地址，5语音地址，6链接地址")
+    @ColumnDefault("2")
+    @Column(name = "type", nullable = false)
+    private Byte type = 2;
+
+    @Comment("排序，越小越靠前")
+    @ColumnDefault("100")
+    @Column(name = "sort", nullable = false)
+    private Integer sort = 100;
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/entity/CommentReply.java b/src/main/java/com/lk/paopao/entity/CommentReply.java
new file mode 100644
index 0000000..3fdc5ad
--- /dev/null
+++ b/src/main/java/com/lk/paopao/entity/CommentReply.java
@@ -0,0 +1,53 @@
+package com.lk.paopao.entity;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import org.hibernate.annotations.ColumnDefault;
+import org.hibernate.annotations.Comment;
+import org.springframework.data.jpa.domain.support.AuditingEntityListener;
+
+@Getter
+@Setter
+@Comment("评论回复")
+@Entity
+@Table(name = "p_comment_reply", indexes = {
+        @Index(name = "idx_comment_reply_comment_id", columnList = "comment_id")
+})
+@EntityListeners(AuditingEntityListener.class)
+public class CommentReply extends BaseAuditingEntity{
+    @Version
+    private Long version;
+
+    @Comment("评论ID")
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "comment_id", nullable = false)
+    private com.lk.paopao.entity.Comment comment;
+
+    @Comment("用户ID")
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "user_id", nullable = false)
+    private User user;
+
+    @Comment("内容")
+    @Column(name = "content", nullable = false, length = 4000)
+    private String content;
+
+    @Comment("IP地址")
+    @Column(name = "ip", length = 15)
+    private String ip;
+
+    @Comment("IP城市地址")
+    @Column(name = "ip_loc", length = 64)
+    private String ipLoc;
+
+    @Comment("点赞数")
+    @ColumnDefault("0")
+    @Column(name = "thumbs_up_count", nullable = false)
+    private Integer thumbsUpCount = 0;
+
+    @Comment("点踩数")
+    @ColumnDefault("0")
+    @Column(name = "thumbs_down_count", nullable = false)
+    private Integer thumbsDownCount = 0;
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/entity/Post.java b/src/main/java/com/lk/paopao/entity/Post.java
new file mode 100644
index 0000000..1d080da
--- /dev/null
+++ b/src/main/java/com/lk/paopao/entity/Post.java
@@ -0,0 +1,93 @@
+package com.lk.paopao.entity;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import org.hibernate.annotations.ColumnDefault;
+import org.hibernate.annotations.Comment;
+
+import java.util.List;
+
+@Getter
+@Setter
+@Comment("冒泡/动态/文章")
+@Entity
+@Table(name = "p_post", indexes = {
+        @Index(name = "idx_post_user_id", columnList = "user_id"),
+        @Index(name = "idx_post_visibility", columnList = "visibility")
+})
+public class Post  extends BaseAuditingEntity{
+
+    @Version
+    private Long version;
+
+    @Comment("用户ID")
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "user_id")
+    private User user;
+
+    @OneToMany(mappedBy = "post", cascade = CascadeType.PERSIST, fetch = FetchType.LAZY)
+    private List<PostContent> contents;
+
+    @Comment("评论数")
+    @ColumnDefault("0")
+    @Column(name = "comment_count", nullable = false)
+    private Long commentCount = 0L;
+
+    @Comment("收藏数")
+    @ColumnDefault("0")
+    @Column(name = "collection_count", nullable = false)
+    private Long collectionCount = 0L;
+
+    @Comment("点赞数")
+    @ColumnDefault("0")
+    @Column(name = "upvote_count", nullable = false)
+    private Long upvoteCount = 0L;
+
+    @Comment("分享数")
+    @ColumnDefault("0")
+    @Column(name = "share_count", nullable = false)
+    private Long shareCount = 0L;
+
+    @Comment("可见性: 0私密 10充电可见 20订阅可见 30保留 40保留 50好友可见 60关注可见 70保留 80保留 90公开")
+    @ColumnDefault("50")
+    @Column(name = "visibility", nullable = false)
+    private Byte visibility;
+
+    @Comment("是否置顶")
+    @ColumnDefault("0")
+    @Column(name = "is_top", nullable = false)
+    private Boolean isTop = false;
+
+    @Comment("是否精华")
+    @ColumnDefault("0")
+    @Column(name = "is_essence", nullable = false)
+    private Boolean isEssence = false;
+
+    @Comment("是否锁定")
+    @ColumnDefault("0")
+    @Column(name = "is_lock", nullable = false)
+    private Boolean isLock = false;
+
+    @Comment("最新回复时间")
+    @Column(name = "latest_replied_on")
+    private Long latestRepliedOn = 0L;
+
+    @Comment("参与的主题")
+    @Column(name = "tags")
+    private String tags;
+
+    @Comment("附件价格(分)")
+    @ColumnDefault("0")
+    @Column(name = "attachment_price", nullable = false)
+    private Long attachmentPrice = 0L;
+
+    @Comment("IP地址")
+    @Column(name = "ip", length = 15)
+    private String ip;
+
+    @Comment("IP城市地址")
+    @Column(name = "ip_loc", length = 64)
+    private String ipLoc;
+
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/entity/PostCollection.java b/src/main/java/com/lk/paopao/entity/PostCollection.java
new file mode 100644
index 0000000..10cf256
--- /dev/null
+++ b/src/main/java/com/lk/paopao/entity/PostCollection.java
@@ -0,0 +1,30 @@
+package com.lk.paopao.entity;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import org.hibernate.annotations.Comment;
+import org.springframework.data.jpa.domain.support.AuditingEntityListener;
+
+@Getter
+@Setter
+@Comment("冒泡/文章收藏")
+@Entity
+@Table(name = "p_post_collection", indexes = {
+        @Index(name = "idx_post_collection_post_id", columnList = "post_id"),
+        @Index(name = "idx_post_collection_user_id", columnList = "user_id")
+})
+@EntityListeners(AuditingEntityListener.class)
+public class PostCollection extends BaseAuditingEntity{
+
+    @Comment("POST ID")
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "post_id", nullable = false)
+    private Post post;
+
+    @Comment("用户ID")
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "user_id", nullable = false)
+    private User user;
+
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/entity/PostContent.java b/src/main/java/com/lk/paopao/entity/PostContent.java
new file mode 100644
index 0000000..31ff81b
--- /dev/null
+++ b/src/main/java/com/lk/paopao/entity/PostContent.java
@@ -0,0 +1,41 @@
+package com.lk.paopao.entity;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import org.hibernate.annotations.ColumnDefault;
+import org.hibernate.annotations.Comment;
+
+@Getter
+@Setter
+@Comment("冒泡/动态/文章内容")
+@Entity
+@Table(name = "p_post_content", indexes = {
+        @Index(name = "idx_post_content_post_id", columnList = "post_id"),
+        @Index(name = "idx_post_content_user_id", columnList = "user_id")
+})
+public class PostContent  extends  BaseAuditingEntity{
+    @Comment("冒泡/动态/文章ID")
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "post_id", nullable = false)
+    private Post post;
+
+    @Comment("用户ID")
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "user_id", nullable = false)
+    private User user;
+
+    @Comment("内容")
+    @Column(name = "content", nullable = false, length = 4000)
+    private String content;
+
+    @Comment("类型，1标题，2文字段落，3图片地址，4视频地址，5语音地址，6链接地址，7附件资源，8收费资源")
+    @ColumnDefault("2")
+    @Column(name = "type", nullable = false)
+    private Byte type = 2;
+
+    @Comment("排序，越小越靠前")
+    @ColumnDefault("100")
+    @Column(name = "sort", nullable = false)
+    private Integer sort =100;
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/entity/PostStar.java b/src/main/java/com/lk/paopao/entity/PostStar.java
new file mode 100644
index 0000000..399c4e1
--- /dev/null
+++ b/src/main/java/com/lk/paopao/entity/PostStar.java
@@ -0,0 +1,29 @@
+package com.lk.paopao.entity;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import org.hibernate.annotations.Comment;
+import org.springframework.data.jpa.domain.support.AuditingEntityListener;
+
+@Getter
+@Setter
+@Comment("冒泡/文章点赞")
+@Entity
+@Table(name = "p_post_star", indexes = {
+        @Index(name = "idx_post_star_post_id", columnList = "post_id"),
+        @Index(name = "idx_post_star_user_id", columnList = "user_id")
+})
+@EntityListeners(AuditingEntityListener.class)
+public class PostStar extends BaseAuditingEntity{
+
+    @Comment("POST ID")
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "post_id", nullable = false)
+    private Post post;
+
+    @Comment("用户ID")
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "user_id", nullable = false)
+    private User user;
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/entity/Tag.java b/src/main/java/com/lk/paopao/entity/Tag.java
new file mode 100644
index 0000000..c01d2b9
--- /dev/null
+++ b/src/main/java/com/lk/paopao/entity/Tag.java
@@ -0,0 +1,37 @@
+package com.lk.paopao.entity;
+
+import jakarta.persistence.*;
+import lombok.Getter;
+import lombok.Setter;
+import org.hibernate.annotations.ColumnDefault;
+import org.hibernate.annotations.Comment;
+@Getter
+@Setter
+@Comment("标签")
+@Entity
+@Table(name = "p_tag", indexes = {
+        @Index(name = "idx_tag_user_id", columnList = "user_id"),
+        @Index(name = "idx_tag_quote_num", columnList = "quote_num")
+}, uniqueConstraints = {
+        @UniqueConstraint(name = "idx_tag_tag", columnNames = {"tag"})
+})
+public class Tag extends BaseAuditingEntity{
+
+    @Version
+    private Long version;
+
+    @Comment("创建者ID")
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "user_id", nullable = false)
+    private User user;
+
+    @Comment("标签名")
+    @Column(name = "tag", nullable = false)
+    private String tag;
+
+    @Comment("引用数")
+    @ColumnDefault("0")
+    @Column(name = "quote_num", nullable = false)
+    private Long quoteNum = 0L;
+
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/mapper/CommentContentMapper.java b/src/main/java/com/lk/paopao/mapper/CommentContentMapper.java
new file mode 100644
index 0000000..924d2ad
--- /dev/null
+++ b/src/main/java/com/lk/paopao/mapper/CommentContentMapper.java
@@ -0,0 +1,15 @@
+package com.lk.paopao.mapper;
+
+import com.lk.paopao.dto.CommentContentDto;
+import com.lk.paopao.entity.CommentContent;
+import org.mapstruct.*;
+
+@Mapper(unmappedTargetPolicy = ReportingPolicy.IGNORE, componentModel = MappingConstants.ComponentModel.SPRING)
+public interface CommentContentMapper {
+    CommentContent toEntity(CommentContentDto commentContentDto);
+
+    CommentContentDto toDto(CommentContent commentContent);
+
+    @BeanMapping(nullValuePropertyMappingStrategy = NullValuePropertyMappingStrategy.IGNORE)
+    CommentContent partialUpdate(CommentContentDto commentContentDto, @MappingTarget CommentContent commentContent);
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/mapper/CommentMapper.java b/src/main/java/com/lk/paopao/mapper/CommentMapper.java
new file mode 100644
index 0000000..7574f06
--- /dev/null
+++ b/src/main/java/com/lk/paopao/mapper/CommentMapper.java
@@ -0,0 +1,20 @@
+package com.lk.paopao.mapper;
+
+import com.lk.paopao.dto.CommentDto;
+import com.lk.paopao.entity.Comment;
+import org.mapstruct.*;
+
+@Mapper(unmappedTargetPolicy = ReportingPolicy.IGNORE, componentModel = MappingConstants.ComponentModel.SPRING)
+public interface CommentMapper {
+    Comment toEntity(CommentDto commentDto);
+
+    @AfterMapping
+    default void linkContents(@MappingTarget Comment comment) {
+        comment.getContents().forEach(content -> content.setComment(comment));
+    }
+
+    CommentDto toDto(Comment comment);
+
+    @BeanMapping(nullValuePropertyMappingStrategy = NullValuePropertyMappingStrategy.IGNORE)
+    Comment partialUpdate(CommentDto commentDto, @MappingTarget Comment comment);
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/mapper/CommentReplyMapper.java b/src/main/java/com/lk/paopao/mapper/CommentReplyMapper.java
new file mode 100644
index 0000000..2f517db
--- /dev/null
+++ b/src/main/java/com/lk/paopao/mapper/CommentReplyMapper.java
@@ -0,0 +1,15 @@
+package com.lk.paopao.mapper;
+
+import com.lk.paopao.dto.CommentReplyDto;
+import com.lk.paopao.entity.CommentReply;
+import org.mapstruct.*;
+
+@Mapper(unmappedTargetPolicy = ReportingPolicy.IGNORE, componentModel = MappingConstants.ComponentModel.SPRING)
+public interface CommentReplyMapper {
+    CommentReply toEntity(CommentReplyDto commentReplyDto);
+
+    CommentReplyDto toDto(CommentReply commentReply);
+
+    @BeanMapping(nullValuePropertyMappingStrategy = NullValuePropertyMappingStrategy.IGNORE)
+    CommentReply partialUpdate(CommentReplyDto commentReplyDto, @MappingTarget CommentReply commentReply);
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/mapper/PostCollectionMapper.java b/src/main/java/com/lk/paopao/mapper/PostCollectionMapper.java
new file mode 100644
index 0000000..593e0ea
--- /dev/null
+++ b/src/main/java/com/lk/paopao/mapper/PostCollectionMapper.java
@@ -0,0 +1,15 @@
+package com.lk.paopao.mapper;
+
+import com.lk.paopao.dto.PostCollectionDto;
+import com.lk.paopao.entity.PostCollection;
+import org.mapstruct.*;
+
+@Mapper(unmappedTargetPolicy = ReportingPolicy.IGNORE, componentModel = MappingConstants.ComponentModel.SPRING)
+public interface PostCollectionMapper {
+    PostCollection toEntity(PostCollectionDto postCollectionDto);
+
+    PostCollectionDto toDto(PostCollection postCollection);
+
+    @BeanMapping(nullValuePropertyMappingStrategy = NullValuePropertyMappingStrategy.IGNORE)
+    PostCollection partialUpdate(PostCollectionDto postCollectionDto, @MappingTarget PostCollection postCollection);
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/mapper/PostContentMapper.java b/src/main/java/com/lk/paopao/mapper/PostContentMapper.java
new file mode 100644
index 0000000..87ddaca
--- /dev/null
+++ b/src/main/java/com/lk/paopao/mapper/PostContentMapper.java
@@ -0,0 +1,15 @@
+package com.lk.paopao.mapper;
+
+import com.lk.paopao.entity.PostContent;
+import com.lk.paopao.dto.PostContentDto;
+import org.mapstruct.*;
+
+@Mapper(unmappedTargetPolicy = ReportingPolicy.IGNORE, componentModel = MappingConstants.ComponentModel.SPRING)
+public interface PostContentMapper {
+    PostContent toEntity(PostContentDto postContentDto);
+
+    PostContentDto toDto(PostContent postContent);
+
+    @BeanMapping(nullValuePropertyMappingStrategy = NullValuePropertyMappingStrategy.IGNORE)
+    PostContent partialUpdate(PostContentDto postContentDto, @MappingTarget PostContent postContent);
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/mapper/PostMapper.java b/src/main/java/com/lk/paopao/mapper/PostMapper.java
new file mode 100644
index 0000000..5baa9b3
--- /dev/null
+++ b/src/main/java/com/lk/paopao/mapper/PostMapper.java
@@ -0,0 +1,15 @@
+package com.lk.paopao.mapper;
+
+import com.lk.paopao.entity.Post;
+import com.lk.paopao.dto.PostDto;
+import org.mapstruct.*;
+
+@Mapper(unmappedTargetPolicy = ReportingPolicy.IGNORE, componentModel = MappingConstants.ComponentModel.SPRING)
+public interface PostMapper {
+    Post toEntity(PostDto postDto);
+
+    PostDto toDto(Post post);
+
+    @BeanMapping(nullValuePropertyMappingStrategy = NullValuePropertyMappingStrategy.IGNORE)
+    Post partialUpdate(PostDto postDto, @MappingTarget Post post);
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/mapper/PostStarMapper.java b/src/main/java/com/lk/paopao/mapper/PostStarMapper.java
new file mode 100644
index 0000000..965dd68
--- /dev/null
+++ b/src/main/java/com/lk/paopao/mapper/PostStarMapper.java
@@ -0,0 +1,15 @@
+package com.lk.paopao.mapper;
+
+import com.lk.paopao.dto.PostStarDto;
+import com.lk.paopao.entity.PostStar;
+import org.mapstruct.*;
+
+@Mapper(unmappedTargetPolicy = ReportingPolicy.IGNORE, componentModel = MappingConstants.ComponentModel.SPRING)
+public interface PostStarMapper {
+    PostStar toEntity(PostStarDto postStarDto);
+
+    PostStarDto toDto(PostStar postStar);
+
+    @BeanMapping(nullValuePropertyMappingStrategy = NullValuePropertyMappingStrategy.IGNORE)
+    PostStar partialUpdate(PostStarDto postStarDto, @MappingTarget PostStar postStar);
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/mapper/TagMapper.java b/src/main/java/com/lk/paopao/mapper/TagMapper.java
new file mode 100644
index 0000000..f99fd6a
--- /dev/null
+++ b/src/main/java/com/lk/paopao/mapper/TagMapper.java
@@ -0,0 +1,17 @@
+package com.lk.paopao.mapper;
+
+import com.lk.paopao.entity.Tag;
+import com.lk.paopao.dto.TagDto;
+import org.mapstruct.*;
+
+@Mapper(unmappedTargetPolicy = ReportingPolicy.IGNORE, componentModel = MappingConstants.ComponentModel.SPRING)
+public interface TagMapper {
+    Tag toEntity(TagDto tagDto);
+
+    @Mapping(source = "user.id", target = "userId")
+    @Mapping(source = "user", target = "user")
+    TagDto toDto(Tag tag);
+
+    @BeanMapping(nullValuePropertyMappingStrategy = NullValuePropertyMappingStrategy.IGNORE)
+    Tag partialUpdate(TagDto tagDto, @MappingTarget Tag tag);
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/repository/CommentContentRepository.java b/src/main/java/com/lk/paopao/repository/CommentContentRepository.java
new file mode 100644
index 0000000..c91825d
--- /dev/null
+++ b/src/main/java/com/lk/paopao/repository/CommentContentRepository.java
@@ -0,0 +1,7 @@
+package com.lk.paopao.repository;
+
+import com.lk.paopao.entity.CommentContent;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface CommentContentRepository extends JpaRepository<CommentContent, Long> {
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/repository/CommentReplyRepository.java b/src/main/java/com/lk/paopao/repository/CommentReplyRepository.java
new file mode 100644
index 0000000..14e18a2
--- /dev/null
+++ b/src/main/java/com/lk/paopao/repository/CommentReplyRepository.java
@@ -0,0 +1,7 @@
+package com.lk.paopao.repository;
+
+import com.lk.paopao.entity.CommentReply;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface CommentReplyRepository extends JpaRepository<CommentReply, Long> {
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/repository/CommentRepository.java b/src/main/java/com/lk/paopao/repository/CommentRepository.java
new file mode 100644
index 0000000..644317b
--- /dev/null
+++ b/src/main/java/com/lk/paopao/repository/CommentRepository.java
@@ -0,0 +1,7 @@
+package com.lk.paopao.repository;
+
+import com.lk.paopao.entity.Comment;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface CommentRepository extends JpaRepository<Comment, Long> {
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/repository/PostCollectionRepository.java b/src/main/java/com/lk/paopao/repository/PostCollectionRepository.java
new file mode 100644
index 0000000..708f050
--- /dev/null
+++ b/src/main/java/com/lk/paopao/repository/PostCollectionRepository.java
@@ -0,0 +1,7 @@
+package com.lk.paopao.repository;
+
+import com.lk.paopao.entity.PostCollection;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface PostCollectionRepository extends JpaRepository<PostCollection, Long> {
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/repository/PostContentRepository.java b/src/main/java/com/lk/paopao/repository/PostContentRepository.java
new file mode 100644
index 0000000..697348e
--- /dev/null
+++ b/src/main/java/com/lk/paopao/repository/PostContentRepository.java
@@ -0,0 +1,7 @@
+package com.lk.paopao.repository;
+
+import com.lk.paopao.entity.PostContent;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface PostContentRepository extends JpaRepository<PostContent, Long> {
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/repository/PostRepository.java b/src/main/java/com/lk/paopao/repository/PostRepository.java
new file mode 100644
index 0000000..b39eb71
--- /dev/null
+++ b/src/main/java/com/lk/paopao/repository/PostRepository.java
@@ -0,0 +1,7 @@
+package com.lk.paopao.repository;
+
+import com.lk.paopao.entity.Post;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface PostRepository extends JpaRepository<Post, Long> {
+}
diff --git a/src/main/java/com/lk/paopao/repository/PostStarRepository.java b/src/main/java/com/lk/paopao/repository/PostStarRepository.java
new file mode 100644
index 0000000..38371f9
--- /dev/null
+++ b/src/main/java/com/lk/paopao/repository/PostStarRepository.java
@@ -0,0 +1,7 @@
+package com.lk.paopao.repository;
+
+import com.lk.paopao.entity.PostStar;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface PostStarRepository extends JpaRepository<PostStar, Long> {
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/repository/TagRepository.java b/src/main/java/com/lk/paopao/repository/TagRepository.java
new file mode 100644
index 0000000..914a978
--- /dev/null
+++ b/src/main/java/com/lk/paopao/repository/TagRepository.java
@@ -0,0 +1,19 @@
+package com.lk.paopao.repository;
+
+import com.lk.paopao.entity.Tag;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+
+import java.util.List;
+import java.util.Optional;
+
+public interface TagRepository extends JpaRepository<Tag, Long> {
+
+    @Query("SELECT t.tag FROM Tag t WHERE t.tag LIKE CONCAT('%', :key, '%') ORDER BY t.tag ASC limit 20")
+    List<String> findByTagContainingOrderByTagAsc(@Param("key") String key);
+
+    Optional<Tag> findByTag(String tag);
+
+
+}
\ No newline at end of file
diff --git a/src/main/java/com/lk/paopao/repository/UserRepository.java b/src/main/java/com/lk/paopao/repository/UserRepository.java
index 9db57fb..9789a12 100644
--- a/src/main/java/com/lk/paopao/repository/UserRepository.java
+++ b/src/main/java/com/lk/paopao/repository/UserRepository.java
@@ -2,9 +2,17 @@ package com.lk.paopao.repository;
 
 import com.lk.paopao.entity.User;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
 
+import java.util.List;
 import java.util.Optional;
 
 public interface UserRepository extends JpaRepository<User, Long> {
     Optional<User> findByUsername(String username);
+
+    // 或者使用@Query注解进行JPQL或SQL查询（如果声明式方法命名无法满足复杂需求）
+    @Query("SELECT u.username FROM User u WHERE u.username LIKE CONCAT('%', :key, '%') ORDER BY u.username ASC limit 20")
+    List<String> findByUsernameContainingOrderByUsernameAsc(@Param("key") String key);
+
 }
\ No newline at end of file
diff --git a/src/main/resources/application.yml b/src/main/resources/application.yml
index b2ebc94..22a2ca0 100644
--- a/src/main/resources/application.yml
+++ b/src/main/resources/application.yml
@@ -25,7 +25,7 @@ spring:
     defer-datasource-initialization: true
     database-platform: org.hibernate.dialect.H2Dialect
     hibernate:
-      ddl-auto: update
+      ddl-auto: create-drop
       # 可选值：create-drop,create,update,none. create-drop：每次启动项目都会删除表，然后重新创建表，适合开发环境；create：每次启动项目都会创建表，适合开发环境；update：每次启动项目都会更新表，适合开发环境；none：不执行任何操作，适合生产环境。
     properties:
       hibernate:
@@ -49,6 +49,8 @@ app:
         methods: ["GET"]
       - path: "/v3/**"
         methods: [ "GET" ]
+      - path: "/h2/**"
+        methods: [ "GET","PUT","POST" ]
       - path: "/v1/auth/**"
         methods: [ "GET","PUT","POST"]
       - path: "/upload/**"