Edg ！动态 SQL！牛 ！
复制select * from t_customer where 1=1
<if test="username !=null and username !=">
and username like concat(%,#{username}, %)
</if>
<if test="jobs !=null and jobs !=">
and jobs= #{jobs}
</if>
1.2.3.4.5.6.7.
THE END
