Spring 注解实例--@Autowired 注入到List和Map

电玩女神 2021-09-14 12:16 713阅读 0赞

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1.  **package** com.Autowired.ListMap;  
2.    
3.  **import** org.springframework.core.annotation.Order;  
4.  **import** org.springframework.stereotype.Component;  
5.  /\*\* 
6.   \* order：把实现类排序输出 只适合List 
7.   \* @author liu 
8.   \* 
9.   \*/  
10. @Order(2)  
11. @Component  
12. **public** **class** BeanImplOne **implements** BeanInterface \{  
13.   
14. \}

================================

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1.  **package** com.Autowired.ListMap;  
2.    
3.  **import** org.springframework.core.annotation.Order;  
4.  **import** org.springframework.stereotype.Component;  
5.    
6.  @Order(1)  
7.  @Component  
8.  **public** **class** BeanImplTwo **implements** BeanInterface \{  
9.    
10. \}

=====================================

BeanInterface只是一个接口无方法

======================================

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1.  **package** com.Autowired.ListMap;  
2.    
3.  **import** java.util.List;  
4.  **import** java.util.Map;  
5.    
6.    
7.  **import** org.springframework.beans.factory.annotation.Autowired;  
8.  **import** org.springframework.beans.factory.annotation.Qualifier;  
9.  **import** org.springframework.stereotype.Component;  
10.   
11. @Component  
12. **public** **class** BeanInvoke \{  
13.       
14.     @Autowired  
15.       **private** List<BeanInterface> list;  
16.         
17.     @Autowired  
18.     **private** Map<String,BeanInterface> map;  
19.       
20.     /\*\* @Autowired默认为byType的  所以有两个相同类型的bean   
21.      \* 如果不使用 @Qualifier指定具体的bean就会抛出异常 
22.      \*  private BeanInterface beaninterface; 
23.      \*/  
24.     @Autowired  
25.    @Qualifier("beanImplOne")  
26.     **private** BeanInterface beaninterface;  
27.     **public** **void** say()\{  
28.         System.out.println("list...");  
29.         **if**(**null** !=list &&0!=list.size())\{  
30.             **for**(BeanInterface bean :list)\{  
31.                 System.out.println(bean.getClass().getName());  
32.             \}  
33.               
34.         \}**else**\{  
35.             System.out.println("List<BeanInterface> list is null !!!!");  
36.         \}  
37.         System.out.println();  
38.         System.out.println("map...");  
39.         **if**(**null** !=map &&0!=map.size())\{  
40.             **for**(Map.Entry<String, BeanInterface> m:map.entrySet())\{  
41.                   System.out.println(m.getKey()+"    "\+m.getValue().getClass().getName());  
42.             \}  
43.         \}**else**\{  
44.             System.out.println("Map<String,BeanInterface> map is null !!!!");  
45.   
46.         \}  
47.         System.out.println("-------------------------");  
48.         **if**(**null** !=beaninterface)\{  
49.             System.out.println(beaninterface.getClass().getName());  
50.         \}**else**\{  
51.             System.out.println("beaninterface is null !!!");  
52.         \}  
53.     \}  
54.       
55.       
56. \}

\------------------------------------------------------

配置文件：

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1.  <?xml version="1.0" encoding="UTF-8"?>  
2.  <beans xmlns="http://www.springframework.org/schema/beans"  
3.      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
4.      xmlns:context="http://www.springframework.org/schema/context"  
5.      xsi:schemaLocation="http://www.springframework.org/schema/beans  
6.          http://www.springframework.org/schema/beans/spring-beans.xsd  
7.          http://www.springframework.org/schema/context  
8.          http://www.springframework.org/schema/context/spring-context.xsd" >  
9.            
10.         <context:component-scan base-**package**="package com.Autowired.ListMap;"></context:component-scan>  
11.           
12.  </beans>

\-----------------------------------------------------

测试类：

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1.  **package** com.Autowired.ListMap;  
2.    
3.  **import** org.junit.Test;  
4.    
5.  **import** com.imooc.test.base.UnitTestBase;  
6.    
7.    
8.  **public** **class** TestListMap  **extends** UnitTestBase\{  
9.      **public** TestListMap()\{  
10.         **super**("classpath\*:spring-beanannotation3.xml");  
11.     \}  
12.       
13.     @Test  
14.     **public** **void** test()\{  
15.         BeanInvoke  bean=**super**.getBean("beanInvoke");  
16.         bean.say();  
17.     \}  
18. \}

结果：

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1.  2017\-6\-4 15:38:26 org.springframework.context.support.AbstractApplicationContext prepareRefresh  
2.  信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@58a17083: startup date \[Sun Jun 04 15:38:26 CST 2017\]; root of context hierarchy  
3.  2017\-6\-4 15:38:26 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions  
4.  信息: Loading XML bean definitions from URL \[file:/E:/myeclipse/workspace/Spring2/bin/spring-beanannotation3.xml\]  
5.  2017\-6\-4 15:38:27 org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor <init>  
6.  信息: JSR-330 'javax.inject.Inject' annotation found and supported **for** autowiring  
7.  list...  
8.  2017\-6\-4 15:38:27 org.springframework.context.support.AbstractApplicationContext doClose  
9.  信息: Closing org.springframework.context.support.ClassPathXmlApplicationContext@58a17083: startup date \[Sun Jun 04 15:38:26 CST 2017\]; root of context hierarchy  
10. com.Autowired.ListMap.BeanImplTwo  
11. com.Autowired.ListMap.BeanImplOne  
12.   
13. map...  
14. beanImplOne    com.Autowired.ListMap.BeanImplOne  
15. beanImplTwo    com.Autowired.ListMap.BeanImplTwo  
16. \-------------------------  
17. com.Autowired.ListMap.BeanImplOne  
18.

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