springioc和aop的代码示例

Spring IOC的代码示例如下：

1. 简单示例：

public class UserService {
    private UserDao userDao;

    public void setUserDao(UserDao userDao) {
        this.userDao = userDao;
    }

    public void saveUser(User user) {
        userDao.save(user);
    }
}

public interface UserDao {
    void save(User user);
}

public class UserDaoImpl implements UserDao {
    public void save(User user) {
        // 执行保存用户的逻辑
    }
}

// 在配置文件中定义Bean
<bean id="userDao" class="com.example.UserDaoImpl" />
<bean id="userService" class="com.example.UserService">
    <property name="userDao" ref="userDao" />
</bean>

2. 带有AOP的示例：

public class LoggingAspect {
    public void beforeAdvice() {
        System.out.println("Before advice: Logging before method execution");
    }

    public void afterAdvice() {
        System.out.println("After advice: Logging after method execution");
    }
}

<bean id="userDao" class="com.example.UserDaoImpl" />

<bean id="userService" class="com.example.UserService">
    <property name="userDao" ref="userDao" />
</bean>

<aop:config>
    <aop:aspect ref="loggingAspect">
        <aop:before method="beforeAdvice" pointcut="execution(* com.example.UserService.saveUser(..))" />
        <aop:after method="afterAdvice" pointcut="execution(* com.example.UserService.saveUser(..))" />
    </aop:aspect>
</aop:config>