Spring的bean管理（註解注入屬性和註解檔案混合使用）

註解方式注入屬性
 1 建立service類，建立dao類，在service得到dao物件
    注入屬性第一個註解 @Autowired
    （1） 建立dao和service物件
      
     

(2) 在service類裡面定義到型別屬性
        注入屬性第一個註解 @Autowired


       
        注入屬性第二個註解@Resource

<?xml version="1.0" encoding="UTF-8"?>
<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.xsd
  http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> 
<!-- 開啟註解掃描 (1) 到包裡面掃描類 方法 屬性上面是否有註解 -->
	<context:component-scan base-package="com.cn.anno"></context:component-scan>
	
</beans>
 

package com.cn.anno;

import org.springframework.stereotype.Service;

@Service(value="userDao")
public class UsersDao {
	public void add(){
		System.out.println("dao..........");
	}
}

package com.cn.anno;

import javax.annotation.Resource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component(value="userService")
public class UserServlce {
	//得到dao物件
	//定義dao型別屬性
	//在dao屬性上面使用註解 完成物件注入
//	@Autowired
//	private UsersDao userDao;
	//使用註解方式時候，不需要set方法
	
	//name屬性值寫註解建立dao物件
	@Resource(name="userDao")
	private UsersDao userDao;
		
	public void add(){
		System.out.println("servlice........");
		userDao.add();
	}
}
 

package com.cn.anno;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TestAnno {
	@Test
	public void testService(){
		ApplicationContext context=
				new ClassPathXmlApplicationContext("bean1.xml");
		UserServlce user=(UserServlce) context.getBean("userService");
		user.add();
	}
}
 

配置檔案和註解混合使用
1.建立物件操作使用配置檔案方式實現
 



2 注入屬性的操作使用註解方式實現

<?xml version="1.0" encoding="UTF-8"?>

<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.xsd
        http://www.springframework.org/schema/context  http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 開啟註解掃描 (1) 到包裡面掃描類 方法 屬性上面是否有註解 -->
  <context:component-scan base-package="com.cn.anno"></context:component-scan>
 
 <!-- 配置物件 -->
   <bean id="bookService" class="com.cn.xmlanno.BookService"></bean>
   <bean id="bookDao" class="com.cn.xmlanno.BookDao"></bean>
   <bean id="orderDao" class="com.cn.xmlanno.OrderDao"></bean>
   

</beans>

package com.cn.xmlanno;

public class BookDao {
	public void book(){
		System.out.println("booksdao......");
	}
}

package com.cn.xmlanno;

public class OrderDao {
	public void buy(){
		System.out.println("ordersdao......");
	}
}

package com.cn.xmlanno;

import javax.annotation.Resource;

public class BookService {
	//得到bookdao和ordersdao物件
	@Resource(name="bookDao")
	private BookDao  bookDao;
	@Resource(name="orderDao")
	private OrderDao  orderDao;
	public void add(){
		System.out.println("service......");
		bookDao.book();
		orderDao.buy();
	}
}

package com.cn.xmlanno;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TestAnno {

	@Test
	public void testService(){
		ApplicationContext context=
				new ClassPathXmlApplicationContext("bean2.xml");
		BookService book=(BookService) context.getBean("bookService");
		book.add();
	}
}