java资料全套\基础+就业\Spring框架2016版视频\day02视频\07-aop原理（二）.xml

--  02-spring的bean管理注解准备 


注解可以写在类 属性 方法上


创建动态网站 spring_day02_demo    选择 2.5    

导入 D:\qudong\spring\01-相关jar包\spring Ioc基本包   D:\qudong\spring\02-spring的aop 

-- bean1.xml 
<!-- 开启注解扫描 
(1)到包里面扫描类、方法、属性上面是否有注解
-->


<context:component-scan base-package="cn.itcast"></context:component-scan>

<!-- 
扫描属性上面的注解  开发中一般不用
-->
 <context:annotation-config></context:annotation-config> 


--  03-spring的bean管理（注解创建对象） 


spring 提供的@component 衍生注解 ：   @Repository 、@Service 和 @Controller  http://blog.csdn.net/tjcyjd/article/details/37903429 


package cn.itcast.anno;


import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;


@Service(value="userX")   // <bean id="userX" class=""/>
@Scope(value="prototype")
public class User {


public void add() {
System.out.println("add...........");
}
}


--
package cn.itcast.anno;


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


public class TestAnno {

@Test
public void testUser() {
ApplicationContext context = 
new ClassPathXmlApplicationContext("bean1.xml");
User user = (User) context.getBean("userX");
System.out.println(user);
user.add();
}
}




--  04-spring的bean管理（注解注入属性）




 有两种注入方法 ： 1 ： @Autowired   2 ：    @Resource Spring注解@Resource和@Autowired区别对比 : https://www.cnblogs.com/think-in-java/p/5474740.html 


package cn.itcast.anno;


import javax.annotation.Resource;


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


@Service(value="userServiceX")
public class UserService {


//得到dao对象
//1 定义dao类型属性
//在dao属性上面使用注解 完成对象注入
// @Autowired
// private UserDao userDao;
// 使用注解方式时候不需要set方法
// name属性值 写 注解创建dao对象 value值
@Resource(name="userDaoX")
private UserDao userDao;

public void add() {
System.out.println("service...........");
userDao.add();
}
}


--
package cn.itcast.anno;


import org.springframework.stereotype.Component;


@Component(value="userDaoX")
public class UserDao {


public void add() {
System.out.println("dao.........");
}
}




--
package cn.itcast.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");
UserService userService = (UserService) context.getBean("userServiceX");
userService.add();
}
 
}




 --  05-spring的bean管理（注解和配置文件混合使用） 
创建对象用配置文件 
注入属性用注解 




package cn.itcast.xmlanno;


public class OrdersDao {


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




-- 
package cn.itcast.xmlanno;


public class BookDao {


public void book() {
System.out.println("bookdao..........");
}
}




-- 
package cn.itcast.xmlanno;


import javax.annotation.Resource;


public class BookService {

//得到bookdao和ordersdao对象
@Resource(name="bookDao")
private BookDao bookDao;

@Resource(name="ordersDao")
private OrdersDao ordersDao;

public void add() {
System.out.println("service.........");
bookDao.book();
ordersDao.buy();
}
}


-- bean2.xml 
<!--  开启注解扫描 
(1)到包里面扫描类、方法、属性上面是否有注解
-->
<context:component-scan base-package="cn.itcast"></context:component-scan>

<!-- 配置对象 -->
<bean id="bookService" class="cn.itcast.xmlanno.BookService"></bean>
<bean id="bookDao" class="cn.itcast.xmlanno.BookDao"></bean>
<bean id="ordersDao" class="cn.itcast.xmlanno.OrdersDao"></bean>

-- 
package cn.itcast.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 bookService = (BookService) context.getBean("bookService");
bookService.add();
}



}


-- 06-aop原理（一）






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