控制台输出：你好!我是xx，我的学号是xx，我的年龄是xx。 2、输出你的爱好，并同时在业务层输出：这是service层，正在执行xxx方法；在数据访问层输出：这是dao层，正在执行xxx方法； 3、配置前置通知、后置通知、返回通知及环绕通知，对上述两题进行增强。

好的，根据你的要求，以下是完整的代码实现和配置：

1. 实体类Student.java

public class Student {
    private String name;
    private String studentNo;
    private int age;
    private String hobby;

    // 省略getter和setter方法
}

2. 数据访问层(StudentDao)和业务层(StudentService)

- StudentDao.java

public interface StudentDao {
    Student getStudent();
}

- StudentDaoImpl.java

public class StudentDaoImpl implements StudentDao {
    @Override
    public Student getStudent() {
        System.out.println("这是dao层，正在执行getStudent方法");
        Student student = new Student();
        student.setName("Tom");
        student.setStudentNo("20210001");
        student.setAge(20);
        student.setHobby("看电影");
        return student;
    }
}

- StudentService.java

public interface StudentService {
    Student getStudent();
}

- StudentServiceImpl.java

public class StudentServiceImpl implements StudentService {
    private StudentDao studentDao;

    public void setStudentDao(StudentDao studentDao) {
        this.studentDao = studentDao;
    }

    @Override
    public Student getStudent() {
        System.out.println("这是service层，正在执行getStudent方法");
        Student student = studentDao.getStudent();
        System.out.println("我的爱好是" + student.getHobby());
        return student;
    }
}

3. AOP配置文件(aop.xml)

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans 
                           http://www.springframework.org/schema/beans/spring-beans.xsd
                           http://www.springframework.org/schema/aop 
                           http://www.springframework.org/schema/aop/spring-aop.xsd">

    <!-- 配置StudentDao和StudentService的bean实例 -->
    <bean id="studentDao" class="com.example.dao.StudentDaoImpl"/>
    <bean id="studentService" class="com.example.service.StudentServiceImpl">
        <property name="studentDao" ref="studentDao"/>
    </bean>

    <!-- 配置增强 -->
    <aop:config>
        <!-- 配置切入点 -->
        <aop:pointcut id="studentServiceGetStudent"
                      expression="execution(* com.example.service.StudentService.getStudent(..))"/>

        <!-- 配置前置通知 -->
        <aop:before pointcut-ref="studentServiceGetStudent"
                     method="beforeAdvice"/>

        <!-- 配置后置通知 -->
        <aop:after pointcut-ref="studentServiceGetStudent"
                   method="afterAdvice"/>

        <!-- 配置返回通知 -->
        <aop:after-returning pointcut-ref="studentServiceGetStudent"
                             method="returningAdvice"
                             returning="result"/>

        <!-- 配置环绕通知 -->
        <aop:around pointcut-ref="studentServiceGetStudent"
                    method="aroundAdvice"/>
    </aop:config>

    <!-- 前置通知 -->
    <bean id="beforeAdviceBean" class="com.example.advice.BeforeAdvice"/>
    <!-- 后置通知 -->
    <bean id="afterAdviceBean" class="com.example.advice.AfterAdvice"/>
    <!-- 返回通知 -->
    <bean id="returningAdviceBean" class="com.example.advice.ReturningAdvice"/>
    <!-- 环绕通知 -->
    <bean id="aroundAdviceBean" class="com.example.advice.AroundAdvice"/>
</beans>

4. 增强实现类

- BeforeAdvice.java

public class BeforeAdvice {
    public void before() {
        System.out.println("执行前置通知");
    }
}

- AfterAdvice.java

public class AfterAdvice {
    public void after() {
        System.out.println("执行后置通知");
    }
}

- ReturningAdvice.java

public class ReturningAdvice {
    public void returning(Object result) {
        System.out.println("执行返回通知，返回值为：" + result.toString());
    }
}

- AroundAdvice.java

public class AroundAdvice {
    public Object around(ProceedingJoinPoint pjp) throws Throwable {
        System.out.println("执行环绕通知前");
        Object result = pjp.proceed();
        System.out.println("执行环绕通知后");
        return result;
    }
}

5. Main方法

public class Main {
    public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext("aop.xml");
        StudentService studentService = context.getBean(StudentService.class);
        Student student = studentService.getStudent();
        System.out.println("你好!我是" + student.getName() + "，我的学号是" + student.getStudentNo() + "，我的年龄是" + student.getAge() + "。");
    }
}

在上面的代码中，我们通过在AOP配置文件中配置切入点和增强，实现了前置通知、后置通知、返回通知及环绕通知的相关功能。

需要注意的是，这里的aop.xml是AOP的配置文件，需要在其中配置StudentDao、StudentService的bean实例，以及增强实现类的bean实例。