mysql数据库中
第一种:
<select id="selectUser" resultType="com.User"> SELECT * from userinfos where username like "%"#{username}"%" </select>
第二种:
<select id="selectUser" resultType="com.User"> SELECT * from userinfos where username like CONCAT("%",#{username},"%") </select>
第三种:
<select id="selectUser" resultType="com.User"> <bind name="username" value="'%' + keyword + '%'" /> SELECT * FROM userinfos WHERE role_name LIKE #{username} </select>