mybatis 配置文件中<set>丢失逗号

实例代码

<update id="updateSelective" parameterType="apply">
        UPDATE apply
        <set>
            <if test="applystageId != null"> applystageId = #{applystageId}, </if>
            <if test="title != null"> title = #{title}, </if>
            <if test="applyDate != null"> applyDate = #{applyDate}, </if>
            <if test="outcome != null"> outcome = #{outcome}, </if>
            <if test="dat != null"> dat = #{dat}, </if>
            <if test="endorse != null"> endorse = #{endorse}, </if>
            <if test="state != null"> state = #{state}, </if>
        </set>
        WHERE id=#{id}
</update>

mybatis 组件会自动将<set>中的最后一个<if>中的逗号去除掉