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Spring中注入List，Set，Map,Properties
泳泳啊泳泳 2018-01-08 12:29:59 浏览272 评论0java spring class schema bean list arraylist
摘要： 下面的例子展示了如何注入 List – <list/> Set – <set/> Map – <map/> Properties – <props/> Spring beans 1 2 3 4 5 6 7 8 9 10 11 12 13 14 import java.
下面的例子展示了如何注入
- List – <list/>
- Set – <set/>
- Map – <map/>
- Properties – <props/>
Spring beans
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
public class Customer
{
private List<Object> lists;
private Set<Object> sets;
private Map<Object, Object> maps;
private Properties pros;
//...
}
配置文件：
<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-2.5.xsd">
<bean
id="CustomerBean" class="com.mkyong.common.Customer">
<!-- java.util.List -->
<property
name="lists">
<list
>
<value
>1</value
>
<ref
bean="PersonBean" />
<bean
class="com.mkyong.common.Person">
<property
name="name" value="mkyongList" />
<property
name="address" value="address" />
<property
name="age" value="28" />
</bean
>
</list
>
</property
>
<!-- java.util.Set -->
<property
name="sets">
<set
>
<value
>1</value
>
<ref
bean="PersonBean" />
<bean
class="com.mkyong.common.Person">
<property
name="name" value="mkyongSet" />
<property
name="address" value="address" />
<property
name="age" value="28" />
</bean
>
</set
>
</property
>
<!-- java.util.Map -->
<property
name="maps">
<map
>
<entry
key="Key 1" value="1" />
<entry
key="Key 2" value-ref="PersonBean" />
<entry
key="Key 3">
<bean
class="com.mkyong.common.Person">
<property
name="name" value="mkyongMap" />
<property
name="address" value="address" />
<property
name="age" value="28" />
</bean
>
</entry
>
</map
>
</property
>
<!-- java.util.Properties -->
<property
name="pros">
<props
>
<prop
key="admin">admin@nospam.com</prop
>
<prop
key="support">support@nospam.com</prop
>
</props
>
</property
>
</bean
>
<bean
id="PersonBean" class="com.mkyong.common.Person">
<property
name="name" value="mkyong1" />
<property
name="address" value="address 1" />
<property
name="age" value="28" />
</bean
>
</
beans>
运行：
public
class App
{
public static
void main( String[] args )
{
ApplicationContext context = new
ClassPathXmlApplicationContext("SpringBeans.xml"
);
Customer cust = (Customer)context.getBean("CustomerBean"
);
System.out.println(cust);
}
}
我们也可以使用ListFactoryBean。The ‘ListFactoryBean‘ class provides developer a way to create a concrete List collection class (ArrayList and LinkedList) in Spring’s bean configuration file.
<
bean id="CustomerBean" class="com.mkyong.common.Customer">
<property
name="lists">
<bean
class="org.springframework.beans.factory.config.ListFactoryBean">
<property
name="targetListClass">
<value
>java.util.ArrayList</value
>
</property
>
<property
name="sourceList">
<list
>
<value
>1</value
>
<value
>2</value
>
<value
>3</value
>
</list
>
</property
>
</bean
>
</property
>
</bean
>
或者：加入：xmlns:util="http://www.springframework.org/schema/util"然后就可以：
<
beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-2.5.xsd">
<bean
id="CustomerBean" class="com.mkyong.common.Customer">
<property
name="lists">
<util:list
list-class="java.util.ArrayList">
<value
>1</value
>
<value
>2</value
>
<value
>3</value
>
</util:list
>
</property
>
</bean
>
</
beans>
SetFactoryBean The ‘SetFactoryBean‘ class provides developer a way to create a concrete Set collection (HashSet and TreeSet) in Spring’s bean configuration file.
set和上面的一样：
<
bean id="CustomerBean" class="com.mkyong.common.Customer">
<property
name="sets">
<util:set
set-class="java.util.HashSet">
<value
>1</value
>
<value
>2</value
>
<value
>3</value
>
</util:set
>
</property
>
</bean
>
MapFactoryBean The ‘MapFactoryBean‘ class provides developer a way to create a concrete Map collection class (HashMap and TreeMap) in Spring’s bean configuration file.
map也一样：
<
bean id="CustomerBean" class="com.mkyong.common.Customer">
<property
name="maps">
<util:map
map-class="java.util.HashMap">
<entry
key="Key1" value="1" />
<entry
key="Key2" value="2" />
<entry
key="Key3" value="3" />
</util:map
>
</property
>
</bean
>
============================================================================== 本文转自被遗忘的博客园博客，原文链接：http://www.cnblogs.com/rollenholt/archive/2012/12/27/2835122.html，如需转载请自行联系原作者
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