📅  最后修改于: 2023-12-03 15:01:21.342000             🧑  作者: Mango
iBATIS是一款持久层框架,它提供了一种优雅的方式访问数据库。iBATIS通过将Java对象映射到SQL语句来实现持久化。
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>1.3.2</version>
</dependency>
<sqlMapConfig>
<dataSource type="POOLED">
<property name="driver" value="${driver}"/>
<property name="url" value="${url}"/>
<property name="username" value="${username}"/>
<property name="password" value="${password}"/>
</dataSource>
<transactionManager type="JDBC"/>
</sqlMapConfig>
<sqlMap namespace="User" >
<select id="selectUserById" parameterClass="int" resultClass="User">
SELECT id,username,password,email
FROM user
WHERE id=#value#
</select>
</sqlMap>
public interface UserDAO {
User selectUserById(int id);
}
public class UserDAOImpl extends SqlMapClientDaoSupport implements UserDAO {
@Override
public User selectUserById(int id) {
return (User) getSqlMapClientTemplate().queryForObject("User.selectUserById", id);
}
}
public static void main(String[] args) {
ApplicationContext ctx = new ClassPathXmlApplicationContext("spring.xml");
UserDAO userDAO = (UserDAO) ctx.getBean("userDAO");
User user = userDAO.selectUserById(1);
System.out.println(user);
}
iBATIS的优点是易学易用,可定制性强,同时它也有一定的局限性。在使用iBATIS时,需要注意数据类型的映射,避免SQL注入等问题。除此之外,iBATIS还可以和Spring等框架结合,实现更加复杂的应用场景。