采用jdbc的事务管理器
- 导入MyBatis相关jar包、数据库驱动jar包
-
参考官方文档，编写核心配置文件
<?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>
<environments default="development">
<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?serverTimezone=Asia/Shanghai"/>
<property name="username" value="root"/>
<property name="password" value="root"/>
</dataSource>
</environment>
</environments>
<mappers>
<mapper resource="org/mybatis/example/BlogMapper.xml"/>
</mappers>
</configuration>
-
创建SessionFactory以及获得SqlSession
public class MyBatisUtil {
public static SqlSessionFactory getSqlSessionFactory() throws IOException {
String resource = "mybatis.cfg.xml";
InputStream inputStream = Resources.getResourceAsStream(resource);
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
return sqlSessionFactory;
}
public static SqlSession getSession() throws IOException {
SqlSessionFactory sqlSessionFactory=getSqlSessionFactory();
return sqlSessionFactory.openSession();
}
}
-
创建实体类
public class User {
private int id;
private String name;
private String pwd;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPwd() {
return pwd;
}
public void setPwd(String pwd) {
this.pwd = pwd;
}
}
-
编写sql语句的映射文件
<?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">
<mapper namespace="entity.UserMapper">
<select id="selectUser" resultType="entity.User">
select * from user where id = #{id}
</select>
</mapper>
-
测试
数据库连接池，使数据库连接可以复用
指定映射文件位置
