Spring通过多种方式实现构造依赖注入-----Spring框架

た入场券 2024-03-23 17:52 93阅读 0赞

>     <?xml version="1.0" encoding="UTF-8"?>
>     <beans xmlns="http://www.springframework.org/schema/beans"
>            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">
>         <bean id="UserDao" class="com.powernode.spring6.dao.UserDao"/>
>         <bean id="VipDao" class="com.powernode.spring6.dao.VipDao"/>
>         <bean id="CS" class="com.powernode.spring6.service.CustomerService">
>             
>             <constructor-arg ref="VipDao"/>
>             <constructor-arg ref="UserDao"/>
>         </bean>
>         <bean id="CSBean" class="com.powernode.spring6.service.CustomerService">
>             
>             <constructor-arg name="userDao" ref="UserDao"/>
>             <constructor-arg name="vipDao" ref="VipDao"/>
>         </bean>
>         <bean id="CustomerService" class="com.powernode.spring6.service.CustomerService">
>             
>             <constructor-arg index="0" ref="UserDao"/>
>             <constructor-arg index="1" ref="VipDao"/>
>         </bean>
>     </beans>
> 
> <?xml version="1.0" encoding="UTF-8"?>  
> <beans xmlns="http://www.springframework.org/schema/beans"  
> 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">  
> <bean id="UserDao" class="com.powernode.spring6.dao.UserDao"/>  
> <bean id="VipDao" class="com.powernode.spring6.dao.VipDao"/>  
> <bean id="CS" class="com.powernode.spring6.service.CustomerService">  
>   
> <constructor-arg ref="VipDao"/>  
> <constructor-arg ref="UserDao"/>  
> </bean>  
> <bean id="CSBean" class="com.powernode.spring6.service.CustomerService">  
>   
> <constructor-arg name="userDao" ref="UserDao"/>  
> <constructor-arg name="vipDao" ref="VipDao"/>  
> </bean>  
> <bean id="CustomerService" class="com.powernode.spring6.service.CustomerService">  
>   
> <constructor-arg index="0" ref="UserDao"/>  
> <constructor-arg index="1" ref="VipDao"/>  
> </bean>  
> </beans>

>     package com.powernode.spring6.test;
>     
>     import com.powernode.spring6.dao.UserDao;
>     import com.powernode.spring6.service.CustomerService;
>     import com.powernode.spring6.service.UserService;
>     import org.junit.Test;
>     import org.springframework.context.ApplicationContext;
>     import org.springframework.context.support.ClassPathXmlApplicationContext;
>     
>     public class SpringDITest
>     {
>         @Test
>         public void TestSetDI()
>         {
>             ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");
>             UserDao userDao = applicationContext.getBean("UserDao", UserDao.class);
>             UserService userService = applicationContext.getBean("UserService", UserService.class);
>             //set方法注入,是在对象实例化后实现的,构造器注入是对象创建时注入的
>             userService.save();
>         }
>         @Test
>         public void TestConstruct()
>         {
>             ApplicationContext applicationContext = new ClassPathXmlApplicationContext("Beans.xml");
>             CustomerService customerService = applicationContext.getBean("CustomerService", CustomerService.class);
>             customerService.save();
>             customerService = applicationContext.getBean("CSBean", CustomerService.class);
>             customerService.save();
>             customerService = applicationContext.getBean("CS",CustomerService.class);
>             customerService.save();
>         }
>     }
> 
> package com.powernode.spring6.test;  
>   
> import com.powernode.spring6.dao.UserDao;  
> import com.powernode.spring6.service.CustomerService;  
> import com.powernode.spring6.service.UserService;  
> import org.junit.Test;  
> import org.springframework.context.ApplicationContext;  
> import org.springframework.context.support.ClassPathXmlApplicationContext;  
>   
> public class SpringDITest  
> \{  
> @Test  
> public void TestSetDI()  
> \{  
> ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");  
> UserDao userDao = applicationContext.getBean("UserDao", UserDao.class);  
> UserService userService = applicationContext.getBean("UserService", UserService.class);  
> //set方法注入,是在对象实例化后实现的,构造器注入是对象创建时注入的  
> userService.save();  
> \}  
> @Test  
> public void TestConstruct()  
> \{  
> ApplicationContext applicationContext = new ClassPathXmlApplicationContext("Beans.xml");  
> CustomerService customerService = applicationContext.getBean("CustomerService", CustomerService.class);  
> customerService.save();  
> customerService = applicationContext.getBean("CSBean", CustomerService.class);  
> customerService.save();  
> customerService = applicationContext.getBean("CS",CustomerService.class);  
> customerService.save();  
> \}  
> \}