MySQL学习（第三篇：myBatis访问）

1、Spring boot的myBatis配置

（1）在application.properties里，添加

spring.datasource.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.username=root
spring.datasource.password=123456

其中3306是本机mysql服务的端口号，test是要访问的mysql数据库。
（2）在Pom.xml添加如下，添加：

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.9</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>

2、应用层

@SpringBootApplication
@MapperScan("org.sang.mapper")
public class MybatisApplication {
public static void main(String[] args) {
SpringApplication.run(MybatisApplication.class, args);
}
}

3、 Controller和Service层

（同JDBCTemplate对应部分）

4、数据操作层

@Repository
public interface BookMapper {
@Insert("insert ignore into book(id,name,author) values(#{id}, #{name}, #{author})")
public int addBook(Book book);
@Delete ("delete from book where id=#{id}")
public int deleteBookById(@Param("id") Integer id);
@Update("update book set name=#{name}, author=#{author} where id=#{id}")
public int updateBookById(Book book);
@Select("select * from book where id=#{id}")
public Book getBookById(@Param("id") Integer id);
@Select ("select * from book")
public List<Book> getAllBooks();
}

注：数据库的更多操作可以参看《https://blog.csdn.net/zhangju978/article/details/90401500》