Mybatis进行持久化操作的步骤

为了使用Mybatis进行持久化操作，通常有如下操作步骤：

• 开发持久化类PO和编写持久化操作的Mapper.xml, 在其中定义要执行的SQL语句
• 获取SqlSessionFactory
• 获取SqlSession
• 用面向对象的方式操作数据库
• 关闭事务，关闭SqlSession

---

Mapper.xml

<mapper namespace="org.tsui.mapper.UserMapper" >
    <insert id="save" parameterType="org.tsui.domain.User" useGeneratedKeys="true">
        INSERT INTO tb_user(name, sex, age) VALUES(#{name}, #{sex}, #{age})
    insert>
mapper>

MyBatis的配置文件mybatis-config.xml

<configuration>
    <settings>
        <setting name="logImpl" value="LOG4J"/>
    settings>
    <environments default="mysql">
        <environment id="mysql">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql://127.0.0.1:3306/mybatis"/>
                <property name="username" value="root"/>
                <property name="password" value="123456"/>
            dataSource>
        environment>
    environments>
    <mappers>
        <mapper resource="org/tsui/mapper/UserMapper.xml"/>
    mappers>
configuration>

测试代码

package org.tsui.tst;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.tsui.domain.User;

import java.io.IOException;
import java.io.InputStream;

public class MybatisTest {
    public static void main(String[] args) throws IOException {
        //读取mybatis-config.xml文件
        InputStream is = Resources.getResourceAsStream("mybatis-config.xml");
        //初始化mybatis，创建SqlSessionFactory实例
        SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(is);
        //创建Session实例
        SqlSession session = factory.openSession();

        //创建User对象
        User user = new User();
        user.setName("cuiyunhong");
        user.setAge(22);
        user.setSex("男");

        //插入数据
        session.insert("org.tsui.mapper.UserMapper.save", user);
        //提交事务
        session.commit();
        //关闭session
        session.close();
    }

}