spring学习笔记05：注解版的AOP

女爷i 2024-04-17 14:58 60阅读 0赞

# 配置文件 #

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
    	xmlns:aop="http://www.springframework.org/schema/aop"
    	xmlns:context="http://www.springframework.org/schema/context"
    	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
    	http://www.springframework.org/schema/context 
    	http://www.springframework.org/schema/context/spring-context.xsd">
    	
    	<context:component-scan base-package="com.spring"/>
    	
    	<aop:aspectj-autoproxy/>
    </beans>

# 自定义通知类： #

//声明一个切面
    @Component
    @Aspect
    public class MyAspect {
    	//声明切点（一个切面可以有多个切点）
    	
    	//1.所有公共方法都是切点
    	@Pointcut("execution (public * *(..))")
    	private void anyPublicOperation() {}
    	//2.指定包下的所有方法为切点
    	@Pointcut("within(com.spring.user.service..*)")
    	private void inServiceLayer() {}
    	//3.表示两类切点中所有公共方法
    	@Pointcut("anyPublicOperation() && inServiceLayer()")
    	private void tradingOperation() {}
    	
    	//声明通知（5类通知：前置、后置、异常、最终、环绕）
    	
    	//1.前置通知
    	@Before("tradingOperation() && args(user)")
    	public  void doAccessCheck(User user) {
    		System.out.println("userName:"+user.getUserName()+"  sex:"+user.getSex()+"  address:"+user.getAddress());
    		System.out.println("前置通知：数据校验、事务开始、权限校验");
    	}
    	
    	//2.后置通知
    	@AfterReturning("tradingOperation()")
    	public void doReturn() {
    		System.out.println("后置通知：数据过滤、事务关闭、操作成功日志");
    	}
    	
    	//3.异常通知
    	@AfterThrowing("tradingOperation()")
    	public void doThrowing() {
    		System.out.println("异常通知：错误日志、统一异常处理");
    	}
    	
    	//4.最终通知
    	@After("tradingOperation()")
    	public void doAfter() {
    		System.out.println("最终通知：事务回滚");
    	}
    	
    	//5.环绕通知
    	/*@Around("tradingOperation()")
    	public void doBasicProfiling() {
    		System.out.println("环绕通知：功能不详，有待学习");
    	}*/
    }

# dao层 #

@Repository
    public class UserDao implements IUserDao {
    
    	public void save(User user) {
    		System.out.println("JDBC Save Method!");
    	}
    
    	public void delete(User user) {
    		System.out.println("JDBC Delete Method!");
    	}
    
    	public void update(User users) {
    		System.out.println("JDBC Update Method!");
    	}
    
    }

# service层 #

@Service
    public class UserService implements IUserService {
    	@Autowired
    	private UserDao userDao;
    
    	public void save(User user) {
    		System.out.println("UserService JDBC Save Method!");
    		userDao.save(user);
    	}
    
    	public void delete(User user) {
    		System.out.println("UserService JDBC Delete Method!");
    		userDao.delete(user);
    	}
    
    	public void update(User user) {
    		System.out.println("UserServiceJDBC Update Method!");
    		userDao.update(user);
    	}
    
    }

# 测试 #

@RunWith(SpringJUnit4ClassRunner.class)
    @ContextConfiguration("classpath:applicationContext-aop.xml")
    public class TestAOP {
    	@Resource(name="userService")
    	private IUserService userService;
    	@Resource(name="user")
    	private User user;
    
    	@Test
    	public void test1() {
    		user.setUserName("张三");
    		user.setSex("男");
    		user.setAddress("东莞理工学院");
    		System.out.println("-------------------------------------------");
    		userService.save(user);
    	}
    }