mybits通过xml文件模糊查询：‘%${value}%‘

'%${value}%' 中value值是确定的，不能改为其他字符串，这是固定格式

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">


<mapper namespace="user">
    <select id="findUserById"  parameterType="int" resultType="com.gyf.model.User">
        select * from user where id = #{id}
    </select>
    <select id="findUserByName" parameterType="String" resultType="com.gyf.model.User">
        select * from user where username like '%${value}%'
    </select>
</mapper>