1.结论：

• 子类 instanceof 父类 == true
• 父类 instanceof 子类 == false

2.测试代码

@Test
    public void testInstanceof() {
        // 子类 instanceof 父类
        ConsultSmsPatientDataBO sub = new ConsultSmsPatientDataBO();
        boolean one = sub instanceof ConsultSmsDataBO; // one = true


        // 父类 instanceof 子类
        ConsultSmsDataBO par = new ConsultSmsDataBO();
        boolean two = par instanceof ConsultSmsPatientDataBO; // two = false

    }