Mybatis There is no getter for property named 'xxxx' in 'class java.lang.String'

There is no getter for property named ‘xxxx’ in ‘class java.lang.String’

	 <where>
            <if test="xxx!=null and xxx!=''">
                and e.name like concat('%',#{xxx},'%')
            </if>
	 </where>

吧上面的原代码改成下图就好了。

 		<where>
            <if test="_parameter!=null and _parameter!=''">
                and e.name like concat('%',#{xxx},'%')
            </if>
        </where>