myBatis关于不允许空值属性的查询

数据库中id属性为主键，不允许为空值

<select id="getUser"
            resultType="com.hundsun.zdr.Stu">
        SELECT * FROM Stu WHERE TRUE
        <if test="id!=0">
            and id = #{id}
        </if>
        <if test="name!=null">
            and name like CONCAT('%',#{name},'%')
        </if>
        <if test="birthday!=null">
            AND birthday like CONCAT('%',#{birthday},'%')
        </if>
        <if test="sex!=null">
            AND sex like CONCAT(#{sex},'%')
        </if>
        <if test="address!=null">
            AND address like CONCAT('%',#{address},'%')
        </if>
        <if test="teacher!=null">
            AND teacher like CONCAT('%',#{teacher},'%')
        </if>
    </select>

myBatis中id要通过0来判断而不能使用null

<if test="id!=0">
            and id = #{id}
        </if>

如果写成这样

<if test="id!=null">
            and id = #{id}
        </if>

查询的时候保证id的值不能为空才能正常的查询到值

这个问题很困扰我