步骤:
1.导入相关jar包
- junit
- mybatis
- mysql数据库
- spring相关的
- aop织入
- mybatis-spring
1、新建一个maven项目
<dependencies>
<!--单元测试包-->
<denpendency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<!--mysql-->
<denpendency>
<groupId>mysql</groupId>
<artifactId>mysql-connerctor-java</artifactId>
<version>5.1.47</version>
</dependency>
<!--mybatis-->
<denpendency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.2</version>
</dependency>
<!--spring-->
<denpendency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.1.9.RELEASE</version>
</dependency>
<!--Spring操作数据库的话,还需要一个spring-jdbc-->
<denpendency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.1.9.RELEASE</version>
</dependency>
<!--aop织入-->
<denpendency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.13</version>
</dependency>
<!--mybatis-spring整合-->
<denpendency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.2</version>
</dependency>
</dependencies>
<build>
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>true</filtering>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>true</filtering>
</resource>
</resources>
</build>
2.编写配置文件
3.测试
1.1、回忆Mybatis
1.编写实体类
package com.jialidun.pojo;
import lombok .Data;
@Data
public class User{
private int id;
private String name;
private String pwd;
}
2.编写核心配置文件mybatis-config.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<!--configuration核心配置文件-->
<configuration>
<!--别名-->
<typeAliases>
<package name="com.jialidun.pojo"/>
</typeAliases>
<environments default="development">
<environment id="development">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="com.mysql.cj.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/mybatis?useSSL=true&useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai"/>
<property name="username" value="root"/>
<property name="password" value="root"/>
</dataSource>
</environment>
</environments>
<mappers>
<mapper class="com.jialidun.mapper.UserMapper"/>
</mappers>
</configuration>
3.编写接口
package com.jialidun.mapper;
public interface UserMapper{
public List<User> selectUser();
}
4.编写Mapper.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">
<!--configuration核心配置文件-->
<mapper namespace="com.jialidun.mapper.UserMapper">
<select id="selectUser" resultType="user">
select * from mybatis.user;
</select>
</mapper>
5.测试
public class TestDemo{
@Test
public void test01{
String resources="mybatis-config.xml";
InputStream in = Resources.getResourceAsStream(resources);
SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(in);
SqlSession sqlSession = sessionFactory.openSession(true);
UserMapper mapper = sqlSession.getMapper(UserMapper.class);
List<User> userList = mapper.selectUser();
for(User user:userList){
System.out.println(user);
}
}
}
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