内容简介：【Java】Spring中注入List，Set，Map,Properties
- 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>
以上所述就是小编给大家介绍的《【Java】Spring中注入List，Set，Map,Properties》，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对 码农网 的支持！
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