天津网站优化首页,湛江cms建站系统,做网站备案与不备案的区别,网站建设中两个月了为了实现一个基于Spring和Spring MVC的汉服文化宣传网站，我们需要创建一个简单的Web应用程序来展示汉服文化和相关信息。这个系统将包括以下几个部分： 数据库表设计：定义文章、用户和评论的相关表。实体类：表示数据库中的数据。DAO层接口及MyBatis映射文件：用于与数据库交…
为了实现一个基于Spring和Spring MVC的汉服文化宣传网站，我们需要创建一个简单的Web应用程序来展示汉服文化和相关信息。这个系统将包括以下几个部分：
数据库表设计：定义文章、用户和评论的相关表。实体类：表示数据库中的数据。DAO层接口及MyBatis映射文件：用于与数据库交互。Service层接口及其实现类：业务逻辑处理。Controller层：处理HTTP请求。前端页面：展示信息并允许用户操作。1. 数据库表设计
假设我们有一个名为hanfu_culture的数据库，其中包含以下表：
articlesuserscommentsCREATE TABLE articles (id INT AUTO_INCREMENT PRIMARY KEY,title VARCHAR(255) NOT NULL,content TEXT NOT NULL,author_id INT NOT NULL,created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,FOREIGN KEY (author_id) REFERENCES users(id)
);CREATE TABLE users (id INT AUTO_INCREMENT PRIMARY KEY,username VARCHAR(100) NOT NULL UNIQUE,email VARCHAR(100) NOT NULL UNIQUE,password VARCHAR(255) NOT NULL
);CREATE TABLE comments (id INT AUTO_INCREMENT PRIMARY KEY,article_id INT NOT NULL,user_id INT NOT NULL,comment_text TEXT NOT NULL,created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,FOREIGN KEY (article_id) REFERENCES articles(id),FOREIGN KEY (user_id) REFERENCES users(id)
);2. 实体类
创建Java实体类来表示这些表的数据。
Article.java
import java.sql.Timestamp;public class Article {private Integer id;private String title;private String content;private Integer authorId;private Timestamp createdAt;// Getters and Setters
}User.java
public class User {private Integer id;private String username;private String email;private String password;// Getters and Setters
}Comment.java
import java.sql.Timestamp;public class Comment {private Integer id;private Integer articleId;private Integer userId;private String commentText;private Timestamp createdAt;// Getters and Setters
}3. DAO层接口及MyBatis映射文件
定义DAO层接口以及对应的XML映射文件。
ArticleDao.java
import java.util.List;public interface ArticleDao {ListArticle getAllArticles();Article getArticleById(int id);void addArticle(Article article);
}ArticleMapper.xml
?xml version="1.0" encoding="UTF-8" ?
!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd"
mapper namespace="com.example.dao.ArticleDao"select id="getAllArticles" resultType="com.example.model.Article"SELECT * FROM articles ORDER BY created_at DESC/selectselect id="getArticleById" parameterType="int" resultType="com.example.model.Article"SELECT * FROM articles WHERE id = #{id}/selectinsert id="addArticle" parameterType="com.example.model.Article"INSERT INTO articles (title, content, author_id, created_at)VALUES (#{title}, #{content}, #{authorId}, NOW())/insert
/mapperUserDao.java
import java.util.List;public interface UserDao {ListUser getAllUsers();User getUserById(int id);User getUserByUsername(String username);void addUser(User user);
}UserMapper.xml
?xml version="1.0" encoding="UTF-8" ?
!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd"
mapper namespace="com.example.dao.UserDao"select id="getAllUsers" resultType="com.example.model.User"SELECT * FROM users/selectselect id="getUserById" parameterType="int" resultType="com.example.model.User"SELECT * FROM users WHERE id = #{id}/selectselect id="getUserByUsername" parameterType="String" resultType="com.example.model.User"SELECT * FROM users WHERE username = #{username}/selectinsert id="addUser" parameterType="com.example.model.User"INSERT INTO users (username, email, password)VALUES (#{username}, #{email}, #{password})/insert
/mapperCommentDao.java
import java.util.List;public interface CommentDao {ListComment getCommentsByArticleId(int articleId);void addComment(Comment comment);
}CommentMapper.xml
?xml version="1.0" encoding="UTF-8" ?
!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd"
mapper namespace="com.example.dao.CommentDao"select id="getCommentsByArticleId" parameterType="int" resultType="com.example.model.Comment"SELECT * FROM comments WHERE article_id = #{articleId} ORDER BY created_at ASC/selectinsert id="addComment" parameterType="com.example.model.Comment"INSERT INTO comments (article_id, user_id, comment_text, created_at)VALUES (#{articleId}, #{userId}, #{commentText}, NOW())/insert
/mapper4. Service层接口及其实现类
定义Service层接口及其实现类。
ArticleService.java
import java.util.List;public interface ArticleService {ListArticle getAllArticles();Article getArticleById(int id);void addArticle(Article article);
}ArticleServiceImpl.java
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;import java.util.List;@Service
public class ArticleServiceImpl implements ArticleService {@Autowiredprivate ArticleDao articleDao;@Overridepublic ListArticle getAllArticles() {return articleDao.getAllArticles();}@Overridepublic Article getArticleById(int id) {return articleDao.getArticleById(id);}@Overridepublic void addArticle(Article article) {articleDao.addArticle(article);}
}UserService.java
import java.util.List;public interface UserService {ListUser getAllUsers();User getUse
