test/target/SSM_03/WEB-INF/classes/mapper/stuMapper.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.itstudy.dao.UserDao">
    <select id="findUser" resultType="com.itstudy.domain.User">
        select * from user
        <where>
            username=#{username}
        </where>
    </select>
    <insert id="insertUser">
            insert into user values (#{username},#{password})
    </insert>
    <select id="findAll" resultType="com.itstudy.domain.Trees">
        select  * from user
    </select>

    <delete id="delete" >
        delete from user
        <where>
            username=#{username}
        </where>
    </delete>
<!--    <select id="findAlltrees" resultType="com.itstudy.domain.User">-->
<!--        select  * from user-->
<!--    </select>-->

    <!--    <select id="findStudent" resultType="com.itstudy.domain.Student">-->
<!--        select * from t_stu-->
<!--        <where>-->
<!--            stu_name=#{stuname}-->
<!--        </where>-->
<!--    </select>-->

<!--    <update id="updateStudent">-->
<!--        update t_stu-->
<!--       <set>-->
<!--           stu_name=#{stuname},stu_class=#{stuclass},stu_dormitory=#{studormitory}-->
<!--       </set>-->
<!--       <where>-->
<!--           stu_id=#{stuid}-->
<!--       </where>-->
<!--    </update>-->

<!--    <select id="findAll" resultType="com.itstudy.domain.Student">-->
<!--        select * from t_stu-->
<!--    </select>-->

<!--    <select id="addStudent">-->
<!--        insert into t_stu values (#{stuid},#{stuname},#{stuclass},#{studormitory})-->
<!--    </select>-->
</mapper>