Spring Constructor Injection with Collections
October 6, 2015
by
at
3:47 pm
We can inject java collections by using constructor injection in spring framework. We can inject following collection by using constructor injection.
- List
- Set
- Map
In this example, there is a library which contains list of book.
Files Required :
- Library.java
- bean.xml
- Test.java
We can inject java collections by using constructor injection in spring framework. We can inject following collection by using constructor injection.
- List
- Set
- Map
In this example, there is a library which contains list of book.
Files Required :
- Library.java
- bean.xml
- Test.java
Library.java
package com.jwt.spring; import java.util.List; public class Library { private int id; private String name; private List<String> books; public Library(int id, String name, List<String> books) { this.id = id; this.name = name; this.books = books; } public String toString() { return "Books Dtails " + books + "Id is: " + id + " Library Name: " + name; } }
bean.xml
<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-3.0.xsd"> <bean id="library" class="com.jwt.spring.Library"> <constructor-arg value="101"></constructor-arg> <constructor-arg value="University Library"></constructor-arg> <constructor-arg> <list> <value>Head First Java</value> <value>Mastering EJB</value> <value>JSF in Action</value> </list> </constructor-arg> </bean> </beans>
Test.java
package com.jwt.spring; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class Test { public static void main(String[] args) { ApplicationContext context = new ClassPathXmlApplicationContext( "bean.xml"); Object o = context.getBean("library"); Library library = (Library) o; System.out.println(library); } }
Output :
Books Dtails [Head First Java, Mastering EJB, JSF in Action]Id is: 101 Library Name: University Library
In Next Chapter we will discuss about Constructor Injection With Collection Of Custom Object
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