标签：blog 持久层 工作 ide scan nts qualifier print base
接着上一篇的内容，下面开始IOC基于注解装配相关的内容
在 classpath 中扫描组件
<context:component-scan>
1 package per.zww.spring.beans.annotation;
2
3 import org.springframework.stereotype.Component;
4
5 @Component
6 public class TestObject {
7 public void test(){
8 System.out.println("testObject...");
9 }
10 }
1 package per.zww.spring.beans.annotation.respository;
2
3 import org.springframework.stereotype.Repository;
4
5 @Repository("userRepository")
6 public class UserRepository {
7 public void repository() {
8 System.out.println("repository...");
9 }
10 }
xml:
<context:component-scan base-package="per.zww.spring.beans.annotation.*"></context:component-scan>
测试：
package per.zww.spring.beans.annotation;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class Main {
public static void main(String[] args) {
ApplicationContext applicationContext=new ClassPathXmlApplicationContext("annotation.xml");
TestObject testObject=(TestObject) applicationContext.getBean("testObject");
testObject.test();
UserRepository userRepository=applicationContext.getBean(UserRepository.class);
userRepository.repository();
}
}
另外我们可以过滤掉一些类：
package per.zww.spring.beans.annotation.service;
public interface UserService {
void service();
}
package per.zww.spring.beans.annotation.service;
import org.springframework.stereotype.Service;
@Service("userService")
public class UserServiceImp implements UserService{
@Override
public void service() {
System.out.println("service...");
}
}
package per.zww.spring.beans.annotation.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import per.zww.spring.beans.annotation.service.UserService;
@Controller
public class UserController {
@Autowired
@Qualifier("userService") //可以用Qualifier来精确匹配
public UserService userService;
public void controller() {
System.out.println("controller...");
userService.service();
}
}
测试：
package per.zww.spring.beans.annotation;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import per.zww.spring.beans.annotation.controller.UserController;
import per.zww.spring.beans.annotation.service.UserService;
public class Main {
public static void main(String[] args) {
UserController userController=(UserController) applicationContext.getBean("userController");
userController.controller();
}
}
标签：blog 持久层 工作 ide scan nts qualifier print base
原文地址：http://www.cnblogs.com/huangjianping/p/7235748.html
