myBatis简单配置和使用

----配置文件----

1.核心配置：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>

      <!-- 对事务的管理和连接池的配置 -->

      <environments default="development">

          <environment id="development">

<!-- 对事务的管理配置 -->

              <transactionManager type="JDBC" />

<!-- 对连接池配置 -->

              <dataSource type="POOLED">

                  <property name="driver" value="oracle.jdbc.driver.OracleDriver" />

                  <property name="url" value="jdbc:oracle:thin:@localhost:1521:orcl" />

                  <property name="username" value="ibatis" />

                  <property name="password" value="ibatis" />

              </dataSource>

          </environment>

      </environments>

     <!-- mapping 文件路径配置 -->

      <mappers>

          <mapper resource="com/zhang/res/UserMapper.xml" />

      </mappers>

  </configuration>

2.映射配置：UserMapper.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">

    <mapper namespace="UserMapper">

   <select id="queryUser" resultType="com.zhang.model.User">

          select * from t_user

    </select>

   <select id="findUserById" resultType="com.zhang.model.User" parameterType="long">

          select * from t_user where id = #{id}

    </select>

   <select id="findUserByName" resultType="com.zhang.model.User" parameterType="java.lang.String">

          select * from t_user where name like '%'||#{name}||'%'

    </select>

   <insert id="addUser">

    
insert into t_user(id,name) values(#{id},#{name})

    </insert>

   <update id="updateUser" parameterType="com.zhang.model.User">

    
update t_user set name = #{name} where id = ${id}

    </update>

   <delete id="deleteUser" parameterType="java.lang.Long">

    
delete t_user where id = #{id}

    </delete>

</mapper>

----使用----

获取工厂

SqlSessionFactoryBuilder
-->
.build(Reader
reader)
-->
SqlSessionFactory

获取连接

SqlSessionFactory
-->
.openSession()
-->
SqlSession

提交

SqlSession
--> .[b]commit()[/b]

关闭连接

SqlSession
-->
.close()

----sql操作----

查

List<User> users = session.selectList("UserMapper.queryUser");

User user = session.selectOne("UserMapper.findUserById",id);

List<User> users = session.selectList("UserMapper.findUserByName",name);

增

session.insert("UserMapper.addUser", user);

session.commit();

改

session.update("UserMapper.updateUser", user);

session.commit();

删

session.delete("UserMapper.deleteUser",id);

session.commit();