There is no getter for property named 'id' in 'class java.lang.Integer'

     <select id="findUserById" parameterType="int" resultType="User">
        select * from user1 
        <where>
            <if test="id != null and id != ''">
                and id=#{id}
            </if>
        </where>
    </select>

 在测试时报错：There is no getter for property named 'id' in 'class java.lang.Integer'

 问题分析：Mybatis默认采用ONGL解析参数，所以会自动采用对象树的形式取integer.id值，引起报错。

 解决方法：  public User findUserById(@Param("id")int id);说明参数值。