1.配置
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<context:component-scan base-package="spring"/>
</beans>
开启注解扫描,扫描属性方法类上的注解,spring容器会根据包的名称去找到相应的类并创建对象的实例。
2.编写类和方法
@Service("userService")
public class UserService {
public void add(){
System.out.println("UserService...");
}
}
@Controller("userController")
public class UserController {
@Autowired
private UserService userService;
public void add(){
userService.add();
}
}
3.测试
public static void main(String[] args) {
ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring/applicationContext.xml");
UserController userController = (UserController)applicationContext.getBean("userController");
userController.add();
}