一个ibatis映射文件的例子（包含增删改单查，多查）

<?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="com.ZXC.lesson.dao.LessonUserDao">

    <sql id="table">
        user
    </sql>
    <sql id="insert_parm">
        u_id,u_name,u_sex,u_age
    </sql>
    <sql id="query_parm">
        u_id,u_name,u_sex,u_age,u_create_time,u_update_time
    </sql>


    <resultMap id="id" type="com.ZXC.lesson.model.LessonUser">
        <id column="u_id" property="ID"/>
        <result column="u_name" property="Name"/>
        <result column="u_sex" property="Sex"/>
        <result column="u_age" property="Age"/>
    </resultMap>

    <insert id="save" parameterType="com.ZXC.lesson.model.LessonUser"
            useGeneratedKeys="true" keyProperty="id">
        INSERT INTO <include refid="table"/>
        (<include refid="insert_parm"/>)
        VALUES
        (#{ID},#{Name},#{Sex},#{Age})
    </insert>

    <update id="update" parameterType="com.ZXC.lesson.model.LessonUser">
        UPDATE <include refid="table"/>
        <set>
            <if test="Sex!=null">u_sex=#{Sex}</if>
            <if test="Age!=null">u_age=#{age}</if>
        </set>
    </update>

    <update id="delete" parameterType="com.ZXC.lesson.model.LessonUser">
        UPDATE <include refid="table" />
        SET is_delete=1
        WHERE u_id=#{ID}
    </update>

    <select id="querybyid" parameterType="com.ZXC.lesson.model.LessonUser">
        SELECT <include refid="query_parm"/>
        FROM <include refid="table"/>
        WHERE u_id=#{ID} AND is_delete=0
    </select>

    <select id="querylist" parameterType="com.ZXC.lesson.model.LessonUser">
        SELECT <include refid="query_parm"/>
        FROM <include refid="table"/>
        WHERE id IN
        <foreach collection="uid_list" open="(" close=")" item="uid" separator=",">          
　　　　　　  #{ID}  
 　　    </foreach> 
       AND is_delete=0 
   </select>
</mapper>