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How
to inject collections in spring IOC
Step1:we can take one
pojoclass, then mentioned all values then provide setter and getter methods.
Step2::next pojoclass
initialized in spring-config.xml.
Step3::finally take main
class then get values.
Lets take small example::
package balu.javainterviewquestionsguru.blogspot.in;
import java
.util. *;
public class JavaCollections
{
List
addreslist;
Set
addresset;
Map
addresmap;
Properties
addprops;
//provide setter and getter methods
Public void
setAddreslist(addlist){
this.addlist=list;
}
Public list getAddreslist(){
System.out.println(“list Elements:”+ addlist’);
return addlist;
}
// a setter method to set setvalues and get values
Public void
setAddresSet(addset){
this.addSet=set;
}
Public Set getAddresSet(){
System.out.println(“set Elements:”+ addset’);
return addset;
}
/ a setter method to set mapvalues and get values
Public void
setAddresMap(addMap){
this.addMap=map;
}
Public Map getAddresMap(){
System.out.println(“map Elements:”+ addmap’);
return addset;
}
/ a setter method to set mapvalues and get values
Public void
setAddresMap(addMap){
this.addMap=map;
}
Public Map getAddresMap(){
System.out.println(“map Elements:”+ addmap’);
return addMap;
}
/ a setter method to set propertiesvalues and get
values
Public void
setAddresproperties(addprops){
this.addprops=props;
}
Public Map getAddresproperties(){
System.out.println(“properties Elements:”+
addprops’);
return addprops;
}
}
main.java:::
package com.balu.javainterviewquestionsguru.blogspot.in;
import
org.springframework.context.ApplicationContext;
import
org.springframework.context.support.ClassPathXmlApplicationContext;
public class mainApp{
public static void main(String args[]){
ApplicationContext cxt= new
ClassPathXmlApplicationContext(“Beans.xml”);
javaCollection jc
=(javaCollcetion)cxt.getBean(“JavaCollection”);
jc.getAddList();
jc.getAddSet();
jc.getAddMap();
jc.getAddProps();
}
}
Beans.xml::
<? Xml
version=”1”>
<beans xmlns=http://www.w3.org/scp/bean xmlns:xsi=http://www.springframework.org/2001 xsi:schema=http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0 xsd
<bean id =”javacollection”
class=”balu.javainterviewquestionsguru.blogspot.in”>
//results setAddres List
<property name=”addlist”>
<list><value>india</value><value>ap</value></list></property>
//results set Addres set
<property name=”addset”>
<set><value>usa</value><value>hyd</value></set></property>
// results set
Addres Map
<property name=”addmap”>
<map><entry key=”1” value=”jermany”/><entry key=”2” value=”goa”/></map></property>
//results set Addres props
<property
name=”addprops”><props></props><prop
key=”one”>balu</prop><prop
key=”two”>pinky</prop></property>
o/p::
list values(duplicate values allowed)india,ap.
set values(duplicate not allowed)usa,hyd
map values(key,value anytype)1=jermany,2=goa.
props values(key,value both
strings)one=balu,two=pinky
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