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

报错信息：

Caused by: org.apache.ibatis.reflection.ReflectionException: There is no getter for property named 'email' in 'class java.lang.String'

错误代码：

<select id="selectUserByEmail" resultType="com.shl.entity.SysUser" parameterType="java.lang.String" useCache="true">
    select * from user where 1=1
    <if test="email != null and email != ''">
        and email='${email}'
    </if>
</select>

解决办法：MyBatis如果参数为String的话，不管接口方法的形参是什么，在Mapper.xml中引用时需要改变为_parameter才能识别

<select id="selectUserByEmail" resultType="com.shl.entity.SysUser" parameterType="java.lang.String" useCache="true">
    select * from user where 1=1
    <if test="_parameter != null and _parameter != ''">
        and email='${_parameter}'
    </if>
</select>