Spring装配各种集合类型的配置文件

// List


<bean id="userService" class="com.spring.service.UserService">
	<property name="list">
  		<list>
  		    <value>aaaa</value>
  			<value>bbbb</value>
  		</list>
  	</property>
 </bean>



//set


 <bean id="userService" class="com.spring.service.UserService">
  	<property name="set">
  		<set>
  			<value>cccc</value>
  			<value>dddd</value>
  		</set>
  	</property>
</bean>


//map


<bean id="userService" class="com.spring.service.UserService">
  	<property name="map">
  		<map>
  			<entry key="1111" value="aaaa"/>
  			<entry key="2222" value="bbbb"/>
  		</map>
  	</property>
</bean>


//properties


<bean id="userService" class="com.spring.service.UserService">
<property name="pro">
  			<props>
  				<prop key="1111">aaaa</prop>
  				<prop key="2222">cccc</prop>
  			</props>	
 		</property>
</bean>

 具体实例

public class Chinese implements Person{

	//下面是一系列的集合属性
	private List<String> schools;
	private Map scores;
	private Map<String, Axe> phaseAxes;
	private Properties health;
	private Set axe;
	private String[] books;
	
	public List<String> getSchools() {
		return schools;
	}

	public void setSchools(List<String> schools) {
		this.schools = schools;
	}

	public Map getScores() {
		return scores;
	}

	public void setScores(Map scores) {
		this.scores = scores;
	}

	public Map<String, String> getPhaseAxes() {
		return phaseAxes;
	}

	public void setPhaseAxes(Map<String, String> phaseAxes) {
		this.phaseAxes = phaseAxes;
	}

	public Properties getHealth() {
		return health;
	}

	public void setHealth(Properties health) {
		this.health = health;
	}

	public Set getAxe() {
		return axe;
	}

	public void setAxe(Set axe) {
		this.axe = axe;
	}

	public String[] getBooks() {
		return books;
	}

	public void setBooks(String[] books) {
		this.books = books;
	}

	public void useAxe() {
		
	}

}

 上面的java代码中有数组、list、set、，map、Properties。下面是针对上面的配置文件。

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://www.springframework.org/schema/beans"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
	http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
	<!-- 定义一个普通的Axe Bean -->
	<bean id="steelAxe" class="com.spring.service.impl.SteelAxe" />
	<bean id="stoneAxe" class="com.spring.service.impl.StoneAxe" />
	
	<!--定义Chinese Bean -->
	<bean id="chinese" class="com.spring.service.impl.Chinese">
		<property name="schools">
			<list>
				<value>小学</value>
				<value>中学</value>
				<value>大学</value>
			</list>
		</property>
		
		<property name="scores">
			<map>
				<entry key="语文" value="88" />
				<entry key="数学" value="87" />
				<entry key="外语" value="88" />
			</map>
		</property>
		
		<property name="phaseAxes">
			<map>
				<entry key="原始社会" value-ref="stoneAxe" />
				<entry key="农业社会" value-ref="steelAxe" />
			</map>
		</property>
		
		<property name="health">
			<props>
				<prop key="血压">正常</prop>
				<prop key="身高">175</prop>
			</props>
		</property>
		
		<property name="axe">
			<set>
				<value>普通字符串</value>
				<bean class="com.spring.service.impl.SteelAxe"></bean>
				<ref local="stoneAxe"/>
			</set>
		</property>
		
		<property name="books">
			<list>
				<value>java 编程思想</value>
				<value>思考致富</value>
				<value>将才</value>
			</list>
		</property>
	</bean>
</beans>

 从上面的配置文件中可以看出，Spring对list属性和数组属性的处理是一样的。

当我们使用<list.../>、<set.../>、<map.../>等元素配置集合属性时，我们还需要手动配置集合元素。由于集合元素又可以是基本类型值、引用容器中的其他Bean、嵌套Bean和集合属性等。所以这些元素又可以接受如下子元素：

          value:指定集合元素是基本数据类型或者字符类型值。

          ref:指定集合元素是容器中另一个Bean实例。

          bean:指定集合元素是一个嵌套Bean。

          list、set、map、props:指定集合元素值又是集合。