Inject list, set, map, and properties in spring.

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• Spring beans

The following example shows how to inject

• 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 ;//...}
 

Configuration file:

<Beans xmlns = "http://www.springframework.org/schema/beans" xmlns: xsi = "http://www.w3.org/2001/XMLSchema-instance" xsi: schemalocation = "http://www.springframework.org/schema/beanshttp://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>

Run:

 
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 );}}
 

We can also useListfactorybean. The'Listfactorybean'Class provides developer a way to create a concrete list collection class (arraylist and outline list) 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>
 

Or: Add: xmlns: util = "http://www.springframework.org/schema/util" and then you can:

<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/beanshttp://www.springframework.org/schema/beans/spring-beans-2.5.xsdhttp://www.springframework.org/schema/utilhttp://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>
 

 

SetfactorybeanThe'Setfactorybean'Class provides developer a way to create a concrete set collection (hashset and treeset) in spring's bean configuration file.

Set is the same as above:

 
<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>
 

MapfactorybeanThe'Mapfactorybean'Class provides developer a way to create a concrete Map Collection class (hashmap and treemap) in spring's bean configuration file.

The same is true for MAP:

<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>