diff --git a/src/main/java/cn/allms/community/domain/model/post/Post.java b/src/main/java/cn/allms/community/domain/model/post/Post.java
new file mode 100644
index 0000000..e62697d
--- /dev/null
+++ b/src/main/java/cn/allms/community/domain/model/post/Post.java
@@ -0,0 +1,99 @@
+package cn.allms.community.domain.model.post;
+
+import cn.allms.community.domain.model.topic.TopicPost;
+import cn.allms.community.infrastructure.constant.CommonConstants;
+import cn.allms.community.infrastructure.constant.ExceptionCodeConstant;
+import cn.allms.community.infrastructure.exception.BusinessException;
+import lombok.Data;
+import org.springframework.util.Assert;
+import org.springframework.util.StringUtils;
+
+import java.util.HashSet;
+import java.util.Objects;
+import java.util.Set;
+
+/**
+ * 帖子对象
+ * @author xieYj
+ * @date 2021/5/11 11:50
+ */
+@Data
+public class Post {
+    /**
+     * 帖子ID
+     */
+    private Long id;
+
+    /**
+     * 帖子作者ID
+     */
+    private Long authorId;
+
+    /**
+     * 帖子标题
+     */
+    private String title;
+
+    /**
+     * 帖子内容
+     */
+    private String sourceContent;
+
+    /**
+     * 发帖时间戳
+     */
+    private Long postingTime;
+
+    /**
+     * 最后修改时间
+     */
+    private Long lastModifyTime;
+
+    /**
+     * 加入的话题
+     */
+    private Set<TopicPost> topics = new HashSet<>();
+
+    /**
+     * 最多加入的主题数
+     */
+    public static final Integer MAX_JOINED_TOPICS_NUM = 5;
+
+    /**
+     * 自定义的setter，优先会调用此set方法，而不是lombok自带的
+     * @param authorId 作者Id
+     */
+    public void setAuthorId(Long authorId) {
+        Assert.isTrue(authorId > 0, "帖子作者Id必须大于0");
+        this.authorId = authorId;
+    }
+
+    public void setSourceContent(String sourceContent) {
+        Assert.isTrue(Objects.nonNull(sourceContent), "帖子内容不能为空");
+        Assert.isTrue(sourceContent.length() >= 16, "帖子内容必须大于16");
+        this.sourceContent = sourceContent;
+    }
+
+    /**
+     * 将帖子关联话题 | 加入话题
+     *
+     * @param topicIds 话题集合
+     */
+    public void joinTopics(String topicIds) throws BusinessException {
+        if (Objects.isNull(topicIds)) {
+            return;
+        }
+        String[] topicIdArray = topicIds.split(CommonConstants.TOPIC_SPLIT_COMMA);
+        for (String s : topicIdArray) {
+            TopicPost topicPost = new TopicPost(Long.valueOf(s), this.getId());
+            this.topics.add(topicPost);
+            if (topicSize() > MAX_JOINED_TOPICS_NUM) {
+                throw new BusinessException(ExceptionCodeConstant.ONE_POST_MOST_JOIN_INTO_FIVE_TOPICS);
+            }
+        }
+    }
+
+    public int topicSize(){
+        return this.topics.size();
+    }
+}
diff --git a/src/main/java/cn/allms/community/domain/model/post/PostAuthor.java b/src/main/java/cn/allms/community/domain/model/post/PostAuthor.java
new file mode 100644
index 0000000..4f02bbe
--- /dev/null
+++ b/src/main/java/cn/allms/community/domain/model/post/PostAuthor.java
@@ -0,0 +1,52 @@
+package cn.allms.community.domain.model.post;
+
+import cn.allms.community.infrastructure.constant.ExceptionCodeConstant;
+import cn.allms.community.infrastructure.exception.BusinessException;
+import lombok.Data;
+
+/**
+ * 帖子作者对象
+ * @author xieYj
+ * @date 2021/5/11 11:51
+ */
+@Data
+public class PostAuthor {
+    /**
+     * 帖子内容最小长度
+     */
+    private final static int MIN_LENGTH_POST_SOURCE_CONTENT = 16;
+
+    /**
+     * 作者ID
+     */
+    private Long id;
+    /**
+     * 作者账号
+     */
+    private String account;
+    /**
+     * 作者昵称
+     */
+    private String nickname;
+
+    /**
+     * 发布帖子
+     *
+     * @param title         帖子标题
+     * @param sourceContent 帖子内容
+     * @return
+     */
+    public Post posting(String title, String sourceContent) throws BusinessException {
+        long currentTimeMillis = System.currentTimeMillis();
+        if (sourceContent.length() < MIN_LENGTH_POST_SOURCE_CONTENT) {
+            throw new BusinessException(ExceptionCodeConstant.POST_SOURCE_CONTENT_AT_LEAST_SIXTEEN_WORDS);
+        }
+        Post post = new Post();
+        post.setAuthorId(this.id);
+        post.setSourceContent(sourceContent);
+        post.setTitle(title);
+        post.setPostingTime(currentTimeMillis);
+        post.setLastModifyTime(currentTimeMillis);
+        return post;
+    }
+}
diff --git a/src/main/java/cn/allms/community/domain/model/topic/Topic.java b/src/main/java/cn/allms/community/domain/model/topic/Topic.java
new file mode 100644
index 0000000..a912500
--- /dev/null
+++ b/src/main/java/cn/allms/community/domain/model/topic/Topic.java
@@ -0,0 +1,36 @@
+package cn.allms.community.domain.model.topic;
+
+import lombok.Data;
+
+import java.sql.Timestamp;
+import java.util.Set;
+
+/**
+ * 话题对象
+ *
+ * @author xieYj
+ * @date 2021/5/11 14:31
+ */
+@Data
+public class Topic {
+    /**
+     * 话题id
+     */
+    private Long id;
+    /**
+     * 话题标题
+     */
+    private String title;
+    /**
+     * 话题描述
+     */
+    private String description;
+    /**
+     * 话题创建时间
+     */
+    private Timestamp createTime;
+    /**
+     * 话题下的帖子列表
+     */
+    private Set<TopicPost> posts;
+}
diff --git a/src/main/java/cn/allms/community/domain/model/topic/TopicPost.java b/src/main/java/cn/allms/community/domain/model/topic/TopicPost.java
new file mode 100644
index 0000000..aed723b
--- /dev/null
+++ b/src/main/java/cn/allms/community/domain/model/topic/TopicPost.java
@@ -0,0 +1,17 @@
+package cn.allms.community.domain.model.topic;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+/**
+ * 话题文章对象
+ *
+ * @author xieYj
+ * @date 2021/5/11 14:31
+ */
+@Data
+@AllArgsConstructor
+public class TopicPost {
+    private Long topicId;
+    private Long postId;
+}
diff --git a/src/main/java/cn/allms/community/domain/service/contentfilter/ContentFilter.java b/src/main/java/cn/allms/community/domain/service/contentfilter/ContentFilter.java
new file mode 100644
index 0000000..a9550a6
--- /dev/null
+++ b/src/main/java/cn/allms/community/domain/service/contentfilter/ContentFilter.java
@@ -0,0 +1,25 @@
+package cn.allms.community.domain.service.contentfilter;
+
+import lombok.Getter;
+import lombok.Setter;
+
+/**
+ * 内容过滤器
+ * @author xieYj
+ * @date 2021/5/11 15:09
+ */
+@Setter
+@Getter
+public abstract class ContentFilter {
+    /**
+     * 下一个内容过滤器
+     */
+    private ContentFilter nextContentFilter;
+
+    /**
+     * 过滤内容
+     * @param object 过滤对象
+     * @return
+     */
+    public abstract boolean filterContent(Object object);
+}
diff --git a/src/main/java/cn/allms/community/domain/service/contentfilter/ImageContentFilter.java b/src/main/java/cn/allms/community/domain/service/contentfilter/ImageContentFilter.java
new file mode 100644
index 0000000..b78309f
--- /dev/null
+++ b/src/main/java/cn/allms/community/domain/service/contentfilter/ImageContentFilter.java
@@ -0,0 +1,14 @@
+package cn.allms.community.domain.service.contentfilter;
+
+/**
+ * 图片过滤器
+ * @author xieYj
+ * @date 2021/5/11 15:17
+ */
+public class ImageContentFilter extends ContentFilter{
+    @Override
+    public boolean filterContent(Object object) {
+        // TODO 调用第三方接口实现图片过滤
+        return false;
+    }
+}
diff --git a/src/main/java/cn/allms/community/domain/service/contentfilter/LocalTextContentFilter.java b/src/main/java/cn/allms/community/domain/service/contentfilter/LocalTextContentFilter.java
new file mode 100644
index 0000000..d718371
--- /dev/null
+++ b/src/main/java/cn/allms/community/domain/service/contentfilter/LocalTextContentFilter.java
@@ -0,0 +1,35 @@
+package cn.allms.community.domain.service.contentfilter;
+
+import org.springframework.util.Assert;
+
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * 本地文本内容过滤器
+ * @author xieYj
+ * @date 2021/5/11 15:24
+ */
+public class LocalTextContentFilter extends TextContentFilter {
+    /**
+     * 本地敏感词
+     */
+    private Set<String> sensitiveWords = new HashSet<>();
+
+    public LocalTextContentFilter() {
+        sensitiveWords.add("NND");
+        sensitiveWords.add("奶奶个熊");
+    }
+
+
+    @Override
+    public boolean filterContent(Object content) {
+        Assert.isTrue(content instanceof String, "本地文本过滤对象必须为 String 类型");
+        for (String sensitiveWord : sensitiveWords) {
+            if (((String) content).contains(sensitiveWord)) {
+                return false;
+            }
+        }
+        return true;
+    }
+}
diff --git a/src/main/java/cn/allms/community/domain/service/contentfilter/PostMainBodyContentFilterChain.java b/src/main/java/cn/allms/community/domain/service/contentfilter/PostMainBodyContentFilterChain.java
new file mode 100644
index 0000000..d643551
--- /dev/null
+++ b/src/main/java/cn/allms/community/domain/service/contentfilter/PostMainBodyContentFilterChain.java
@@ -0,0 +1,46 @@
+package cn.allms.community.domain.service.contentfilter;
+
+import cn.allms.community.domain.model.post.Post;
+
+import java.util.Set;
+
+/**
+ * 帖子内容过滤：包含文本过滤，图片过滤
+ * 责任链模式
+ *
+ * @author xieYj
+ * @date 2021/5/11 15:33
+ */
+public class PostMainBodyContentFilterChain {
+    /**
+     * 内容过滤器
+     */
+    private Set<ContentFilter> contentFilters;
+
+    public PostMainBodyContentFilterChain() {
+        TextContentFilter localTextContentFilter = new LocalTextContentFilter();
+        TextContentFilter remoteTextContentFilter = new RemoteTextContentFilter();
+        ImageContentFilter imageContentFilter = new ImageContentFilter();
+        // 优先校验本地的敏感词
+        contentFilters.add(localTextContentFilter);
+        // 第三方文本敏感词过滤
+        contentFilters.add(remoteTextContentFilter);
+        // 第三方图片过滤
+        contentFilters.add(imageContentFilter);
+    }
+
+    /**
+     * 过滤标题
+     *
+     * @param post 帖子信息
+     * @return true —— 通过, false —— 未通过
+     */
+    public boolean filterMainBody(Post post) {
+        for (ContentFilter contentFilter : contentFilters) {
+            if (!contentFilter.filterContent(post.getSourceContent())) {
+                return false;
+            }
+        }
+        return true;
+    }
+}
diff --git a/src/main/java/cn/allms/community/domain/service/contentfilter/PostTitleContentFilterChain.java b/src/main/java/cn/allms/community/domain/service/contentfilter/PostTitleContentFilterChain.java
new file mode 100644
index 0000000..cff9e4e
--- /dev/null
+++ b/src/main/java/cn/allms/community/domain/service/contentfilter/PostTitleContentFilterChain.java
@@ -0,0 +1,44 @@
+package cn.allms.community.domain.service.contentfilter;
+
+import cn.allms.community.domain.model.post.Post;
+
+import java.util.Iterator;
+import java.util.Set;
+
+/**
+ * 帖子标题过滤：文本过滤
+ * 责任链模式
+ *
+ * @author xieYj
+ * @date 2021/5/11 15:40
+ */
+public class PostTitleContentFilterChain {
+    /**
+     * 内容过滤器
+     */
+    private Set<ContentFilter> contentFilters;
+
+    public PostTitleContentFilterChain() {
+        LocalTextContentFilter localTextContentFilter = new LocalTextContentFilter();
+        RemoteTextContentFilter remoteTextContentFilter = new RemoteTextContentFilter();
+        // 本地文本敏感词校验
+        contentFilters.add(localTextContentFilter);
+        // 第三方文本敏感词校验
+        contentFilters.add(remoteTextContentFilter);
+    }
+
+    /**
+     * 过滤标题
+     *
+     * @param post 帖子信息
+     * @return true —— 通过，false —— 未通过
+     */
+    public boolean filterTitle(Post post) {
+        for (ContentFilter contentFilter : contentFilters) {
+            if (!contentFilter.filterContent(post.getTitle())) {
+                return false;
+            }
+        }
+        return true;
+    }
+}
diff --git a/src/main/java/cn/allms/community/domain/service/contentfilter/RemoteTextContentFilter.java b/src/main/java/cn/allms/community/domain/service/contentfilter/RemoteTextContentFilter.java
new file mode 100644
index 0000000..7acf6eb
--- /dev/null
+++ b/src/main/java/cn/allms/community/domain/service/contentfilter/RemoteTextContentFilter.java
@@ -0,0 +1,14 @@
+package cn.allms.community.domain.service.contentfilter;
+
+/**
+ * 远程文本内容过滤器
+ * @author xieYj
+ * @date 2021/5/11 15:22
+ */
+public class RemoteTextContentFilter extends TextContentFilter{
+    @Override
+    public boolean filterContent(Object object) {
+        // TODO 需要调用第三方服务才能实现
+        return false;
+    }
+}
diff --git a/src/main/java/cn/allms/community/domain/service/contentfilter/TextContentFilter.java b/src/main/java/cn/allms/community/domain/service/contentfilter/TextContentFilter.java
new file mode 100644
index 0000000..83d7293
--- /dev/null
+++ b/src/main/java/cn/allms/community/domain/service/contentfilter/TextContentFilter.java
@@ -0,0 +1,16 @@
+package cn.allms.community.domain.service.contentfilter;
+
+/**
+ * 文本过滤器
+ * @author xieYj
+ * @date 2021/5/11 15:18
+ */
+public abstract class TextContentFilter extends ContentFilter{
+    /**
+     * 文本过滤器，抽象
+     * @param object 过滤对象
+     * @return
+     */
+    @Override
+    public abstract boolean filterContent(Object object);
+}
diff --git a/src/main/java/cn/allms/community/infrastructure/constant/CommonConstants.java b/src/main/java/cn/allms/community/infrastructure/constant/CommonConstants.java
new file mode 100644
index 0000000..4332c68
--- /dev/null
+++ b/src/main/java/cn/allms/community/infrastructure/constant/CommonConstants.java
@@ -0,0 +1,10 @@
+package cn.allms.community.infrastructure.constant;
+
+/**
+ * 公共常量
+ * @author xieYj
+ * @date 2021/5/11 14:56
+ */
+public interface CommonConstants {
+    String TOPIC_SPLIT_COMMA = ",";
+}
diff --git a/src/main/java/cn/allms/community/infrastructure/constant/ExceptionCodeConstant.java b/src/main/java/cn/allms/community/infrastructure/constant/ExceptionCodeConstant.java
new file mode 100644
index 0000000..6b0abad
--- /dev/null
+++ b/src/main/java/cn/allms/community/infrastructure/constant/ExceptionCodeConstant.java
@@ -0,0 +1,12 @@
+package cn.allms.community.infrastructure.constant;
+
+/**
+ * 异常码状态常量
+ *
+ * @author xieYj
+ * @date 2021/5/11 14:17
+ */
+public interface ExceptionCodeConstant {
+    String POST_SOURCE_CONTENT_AT_LEAST_SIXTEEN_WORDS = "2001";
+    String ONE_POST_MOST_JOIN_INTO_FIVE_TOPICS = "2002";
+}
diff --git a/src/main/java/cn/allms/community/infrastructure/exception/BusinessException.java b/src/main/java/cn/allms/community/infrastructure/exception/BusinessException.java
new file mode 100644
index 0000000..4c41736
--- /dev/null
+++ b/src/main/java/cn/allms/community/infrastructure/exception/BusinessException.java
@@ -0,0 +1,84 @@
+package cn.allms.community.infrastructure.exception;
+
+/**
+ * @author xieYj
+ * @date 2021/5/11 13:59
+ */
+public class BusinessException extends Exception {
+    /**
+     * 业务异常码
+     */
+    private String code;
+    /**
+     * 业务异常参数
+     */
+    private Object[] arguments;
+
+    public BusinessException() {
+        super();
+    }
+
+    public BusinessException(Throwable cause) {
+        super(cause);
+    }
+
+    public BusinessException(String message) {
+        super(message);
+    }
+
+    public BusinessException(String code, String message) {
+        super(message);
+        this.code = code;
+    }
+
+    public BusinessException(String message, Object[] arguments) {
+        super(message);
+        this.arguments = arguments;
+    }
+
+    public BusinessException(String code, String message, Object[] arguments) {
+        super(message);
+        this.code = code;
+        this.arguments = arguments;
+    }
+
+    public BusinessException(String message, Object[] arguments, Throwable cause) {
+        super(message, cause);
+        this.arguments = arguments;
+    }
+
+    public BusinessException(String code, String message, Object[] arguments, Throwable cause) {
+        super(message, cause);
+        this.code = code;
+        this.arguments = arguments;
+    }
+
+    public BusinessException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+
+    public BusinessException(String code, String message, Throwable cause) {
+        super(message, cause);
+        this.code = code;
+    }
+
+
+    public BusinessException(String message,
+                             Throwable cause,
+                             boolean enableSuppression,
+                             boolean writableStackTrace) {
+        super(message, cause, enableSuppression, writableStackTrace);
+    }
+
+
+    public BusinessException(String code,
+                             String message,
+                             Throwable cause,
+                             boolean enableSuppression,
+                             boolean writableStackTrace) {
+        super(message, cause, enableSuppression, writableStackTrace);
+        this.code = code;
+    }
+
+}