关于sql判断报错问题

<select id="findAll" resultMap="forAll">
    select * from student
        <if test="major!=null">
            where major = #{major}

        </if>

</select>

<resultMap id="forAll" type="com.been.Strudent">
    <id property="id" column="id"></id>
    <collection property="courses" column="id" ofType="com.been.Course" select="getCourses"></collection>
</resultMap>

<select id="getCourses">
    select * from course where major_name = #{major}
</select>

if(Objects.equals("/findAll",pathStr)){

    major = "哲学系";
    List<Strudent> all= studentDao.findAll(major);

    System.out.println(all);
    request.setAttribute("students", all);

    request.getRequestDispatcher(request.getContextPath() + "/WEB-INF/all.jsp").forward(request, response);
}

public List<Strudent> findAll(@Param("major")String major) {
    try {
        list = getSqlSession().selectList("findAll",major);

    } finally {
        SqlSessionUtil.closeSqlSession();
    }

    return list;
}