《Pro Spring》学习笔记之集合注入

配置文件：

 

<?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-2.0.xsd">
<bean id="collectionTest" class="ch4_CollectionDI.CollectionTest">
  
  <property name="map">
    <map>
      <entry key="someValue">
        <value>somekey</value>
      </entry>
      <entry key="someBean">
        <ref bean="course"/>
      </entry>
    </map>
  </property>
  
  <property name="list">
    <list>
      <value>listvalue</value>
      <ref bean="course"/>
    </list>
  </property>
  
  <property name="set">
    <set>
     <value>setvalue</value>
     <ref bean="course"/>
    </set>
  </property>
  
  <!-- properties只能存放String类型数据 -->
  <property name="properties">
    <props>
      <prop key="someValue1">
        1
      </prop>
      <prop key="someValue2">
        2
      </prop>
    </props>
  </property>
</bean>

<bean id="course" class="ch4_CollectionDI.Course">
</bean>
</beans>

 javaBean:

 

package ch4_CollectionDI;

public class Course ...{
  private String courseName;

public String getCourseName() ...{
    return courseName;
}

public void setCourseName(String courseName) ...{
    this.courseName = courseName;
}
}

 

测试代码：

 

package ch4_CollectionDI;

import java.io.File;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.FileSystemResource;



public class TestSpring ...{
  public static void main(String args[])  throws Exception...{
      //获取bean factory
      BeanFactory factory=(BeanFactory)getBeanFactory();
      
      CollectionTest collectionTest=(CollectionTest)factory.getBean("collectionTest");
      
      Map map=collectionTest.getMap();
      List list=collectionTest.getList();
      Set set=collectionTest.getSet();
      Properties properties=collectionTest.getProperties();
      
      System.out.println("Map content:");
      Iterator iter=map.keySet().iterator();
      while (iter.hasNext()) ...{
         Object element =  iter.next();
         System.out.println("key:"+element+"-value:"+map.get(element));
      }
      
      System.out.println("Set content:");
      iter=set.iterator();
      while (iter.hasNext()) ...{
         Object element =  iter.next();
         System.out.println("value:"+element);
      }
      
      System.out.println("List content:");
      iter=list.iterator();
      while (iter.hasNext()) ...{
         Object element =  iter.next();
         System.out.println("value:"+element);
      }
      
      //properties迭代后排序的
      System.out.println("Properties content:");
      iter=properties.keySet().iterator();
      while (iter.hasNext()) ...{
         Object element =  iter.next();
         System.out.println("key:"+element+"-value:"+properties.get(element));
      }
      
  }
  public static BeanDefinitionRegistry getBeanFactory() ...{
      //获取bean factory
      String realpath="";
         //加载配置项
       realpath=System.getProperty("user.dir")+File.separator+"src"+File.separator+"ch4_CollectionDI"+File.separator+"applicationContext.xml";
      XmlBeanFactory  factory=new XmlBeanFactory(new FileSystemResource(realpath));
     
      
      return factory;
  }
}

 

运行结果：

Map content:
key:someValue-value:somekey
key:someBean-value:ch4_CollectionDI.Course@a8c488
Set content:
value:setvalue
value:ch4_CollectionDI.Course@a8c488
List content:
value:listvalue
value:ch4_CollectionDI.Course@a8c488
Properties content:
key:someValue2-value:2
key:someValue1-value:1