spring学习笔记04：注解开发，减少配置文件的配置

常用注解

@Repository 对应dao
@Service 对应service
@Controller 对应controller
@Component (除去dao、service、controller外注解扫描都用这个)
@Autowired (自动装配)
@Resource(name="") （也是自动装配，可以指定装配对象）
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(“xxx.xml”) 加载配置

配置文件需要开启注解：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	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/context
	http://www.springframework.org/schema/context/spring-context.xsd">
	<!-- 开启组件扫描，默认开启注解 -->
	<context:component-scan base-package="com.spring.user"/>

</beans>

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);
	}

}

controller层

@Controller
public class UserController {
	@Autowired
	private IUserService userService;
}

其他用@Component

@Component
public class User {

}

测试

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext-aop.xml")
public class TestAOP {
	@Resource(name="accountService")
	AccountService accountService;
	@Test
	public void test1() {
		accountService.save();
	}
}