①、搭建maven项目,导入MyBatis的依赖
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.2</version>
</dependency>
<!--引入mybatis框架-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.6</version>
</dependency>
②、配置MyBatis的配置文件(mybatis_config.xml)
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<typeAliases>
<package name="com.xb.model"/>
</typeAliases>
<environments default="development">
<!--数据库连接配置-->
<environment id="development">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/test?characterEncoding=utf-8"/>
<property name="username" value="root"/>
<property name="password" value="123456"/>
</dataSource>
</environment>
</environments>
<!--告知MyBatis配置文件实体类Mapper xml-->
<mappers>
<mapper resource="com/xb/model/UserMapper.xml"></mapper>
</mappers>
</configuration>
③、实体类和实体类的MapperXml
<?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">
<!--实体类mapper接口-->
<mapper namespace="com.xb.mapper.UserMapper">
<!--查询
resultType:查询结果类型
-->
<select id="select" resultType="com.xb.model.User">
select * from users
</select>
<!--删除
parameterType:传递参数的类型
-->
<delete id="delete" parameterType="Integer">
delete from users where usersid=#{usersid}
</delete>
<!--添加
parameterType:传递参数的类型
-->
<insert id="insert" parameterType="User">
insert into users values (null,#{usersName},#{usersPwd});
</insert>
<!--修改
parameterType:传递参数的类型
-->
<update id="update" parameterType="User">
update users set usersPwd=#{usersPwd} where usersid=# {usersid}
</update>
</mapper>
④、实体类mapper接口
public interface UserMapper {
List<User> select();
void delete(Integer usersid);
void insert(User u);
void update(User u);
}
最后测试:
public class TestAction {
@Test
public void test(){
//获取SqlSession
SqlSessionFactory factory=new SqlSessionFactoryBuilder().build(getClass().getClassLoader().getResourceAsStream("mybatis_config.xml"));
//通过SqlSession打开一个session
SqlSession session = factory.openSession();
UserMapper mapper = session.getMapper(UserMapper.class);
List<User> select = mapper.select();
for (User user : select) {
System.out.println(user);
}
//mapper.update(new User(2,"hxb","123456"));
//session.commit();
session.close();
}
}