Spring boot environment construction (3) - integration of Mybatis

1. Maven dependencies

The spring-boot-starter foundation and spring-boot-starter-test are used here for unit testing to verify data access.
Introducing the necessary dependencies for connecting to mysql mysql-connector-java
Introducing the core dependencies of integrating MyBatis mybatis-spring-boot-starter
here The spring-boot-starter-jdbc dependency is not introduced because this dependency is already included in mybatis-spring-boot-starter

	<dependency>
			<groupId>org.mybatis.spring.boot</groupId>
			<artifactId>mybatis-spring-boot-starter</artifactId>
			<version>1.1.1</version>
		</dependency>

		<dependency> <!-- 数据库 -->
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.21</version>
		</dependency>

2. Add database information in application.properties

spring.datasource.url=jdbc:mysql://127.0.0.1:3306/datalar   
spring.datasource.username=root
spring.datasource.password=654321
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

3. MySQL table creation statement

CREATE TABLE userinfo (
  id INT NOT NULL AUTO_INCREMENT,
  NAME VARCHAR(20) DEFAULT NULL,
  age VARCHAR(20) DEFAULT NULL,
  PRIMARY KEY (id)
) ENGINE=INNODB AUTO_INCREMENT=8 DEFAULT CHARSET=utf8

4. Create a new UserDao in the DAO layer,

@Mapper
public interface UserDao {
    @Select("SELECT * FROM USERINFO WHERE NAME = #{name}")
    User findByName(@Param("name") String name);

    @Insert("INSERT INTO USERINFO(NAME, AGE) VALUES(#{name}, #{age})")
    int insert(@Param("name") String name, @Param("age") Integer age);
}

5. Modify application.java

@EnableAutoConfiguration
@MapperScan("com.lar.testInterface.dao")
@ComponentScan(basePackages= {"com.lar.testInterface"})
public class Application {
    public static void main(String[] args) throws Exception{
        SpringApplication.run(Application.class, args);
        System.out.println("Startup successful");
    }
}

6. Restart