聊天对话记录连接
https://www.doubao.com/thread/wd3e89483fa4a4422
问题
如下json 在springboot中使用mysql存储，及mybatis应该如何设计
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东海倚天剑来咯！“屠龙不出，谁与争锋？”\n 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\n 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豆包回答
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在 Spring Boot 中使用 MySQL 存储数据并结合 MyBatis 进行操作，可按以下步骤进行设计：
项目搭建
初始化 Spring Boot 项目，在pom.xml文件中添加必要的依赖，包括spring-boot-starter-web、spring-boot-starter-data-jpa、mysql-connector-java、mybatis-spring-boot-starter等。这些依赖分别用于支持 Web 开发、JPA 数据访问、MySQL 数据库连接以及 MyBatis 集成。
配置application.yml文件，设置 MySQL 数据库连接信息，包括url、username、password等，同时配置 MyBatis 的相关属性，如mapper-locations指定 Mapper XML 文件的位置。
数据库表设计
根据 JSON 数据结构，创建相应的数据库表。例如，创建sns表存储 SNS 信息，包含sns_id、nick_name、wx_id、content_des、create_time、like_count等字段；创建media表存储媒体信息，通过外键关联sns表，字段包括media_id、media_type、sns_id等；若媒体类型为图片或视频，分别创建img_media和video_media表，存储图片和视频的具体信息，同样通过外键关联media表。
实体类创建
依据数据库表结构，创建对应的实体类。使用@Entity注解标记实体类，@Table注解指定对应的数据库表名。例如，Sns实体类对应sns表，包含相应的属性和getter、setter方法；Media实体类对应media表，通过@OneToMany或@ManyToOne注解处理与其他实体类的关系。
Mapper 接口和 XML 文件编写
创建 Mapper 接口，使用@Mapper注解标记，定义数据访问方法。如在SnsMapper接口中定义findAll()方法获取所有 SNS 信息，findBySnsId(String snsId)方法根据 SNS ID 查找信息。
编写 Mapper XML 文件，实现 SQL 语句。例如，在SnsMapper.xml中，<select>标签用于查询操作，<insert>标签用于插入数据，<update>标签用于更新数据，<delete>标签用于删除数据。
Service 层实现
创建 Service 类，实现业务逻辑。在类中注入 Mapper 接口，调用 Mapper 方法进行数据操作。如在SnsService类中，实现获取所有 SNS 信息的方法，调用SnsMapper的findAll()方法，并可对数据进行进一步处理。
Controller 层创建
创建 Controller 类，处理 HTTP 请求。在类中注入 Service 类，调用 Service 方法获取数据并返回给前端。例如，在SnsController类中，定义@GetMapping("/sns")注解的方法，返回所有 SNS 信息。
通过上述步骤，可在 Spring Boot 项目中使用 MySQL 存储数据，并借助 MyBatis 实现数据的持久化和访问操作。
继续追问
请给出实例代码
豆包继续作答
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代码说明
pom.xml：包含项目所需的依赖，如 Spring Boot Web、MyBatis 和 MySQL 驱动。
application.yml：配置数据库连接信息和 MyBatis 的 Mapper 文件位置。
实体类：定义了Sns、Comment、Like、Media、ImgMediaItem和VideoMediaItem等实体类，用于映射数据库表。
SnsMapper.java：MyBatis 的 Mapper 接口，定义了插入和查询 SNS 信息的方法。
SnsMapper.xml：实现了 Mapper 接口中的方法对应的 SQL 语句。
SnsService.java：服务层，调用 Mapper 接口的方法实现业务逻辑。
SnsController.java：控制器层，处理 HTTP 请求，调用服务层的方法。
SnsApplication.java：Spring Boot 启动类。
注意事项
请根据实际情况修改application.yml中的数据库连接信息。
示例中的 SQL 语句仅为基本的插入和查询操作，你可以根据需求扩展。
对于复杂的关联关系，可能需要进一步优化 SQL 语句和实体类的映射。
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