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Spring PropertyOverrideConfigurer (context:property-override) Example

By Arvind Rai, November 01, 2021
Spring PropertyOverrideConfigurer is used to override the bean values fetching from property file in Spring application context.
Find the code to use PropertyOverrideConfigurer class.
<bean class="org.springframework.beans.factory.config.PropertyOverrideConfigurer">
	<property name="location" value="classpath:beanOverride.cfg" />
</bean>  
We can achieve the same using <context:property-override> as follows.
<context:property-override location="classpath:beanOverride.cfg"/> 
We need to configure properties in property file in below format.
beanName.property=value 




Using PropertyOverrideConfigurer

app-conf.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans 
           http://www.springframework.org/schema/beans/spring-beans.xsd
           http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context.xsd">

    <bean class="org.springframework.beans.factory.config.PropertyOverrideConfigurer">
	<property name="location" value="classpath:beanOverride.cfg" />
    </bean> 
    <bean id="person" class="com.concretepage.Person" >
       <property name="name" value="Ram"/>
       <property name="age" value="20"/>
       <property name="location" value="Varanasi"/>
    </bean> 
</beans> 
beanOverride.cfg
person.age=40
person.location=Delhi 
Person.java
package com.concretepage;
public class Person {
	private String name;
	private int age;
	private String location;
		
	public String getLocation() {
		return location;
	}
	public void setLocation(String location) {
		this.location = location;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
} 
SpringAppTest.java
package com.concretepage;
import java.sql.SQLException;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class SpringAppTest {
	public static void main(String[] args) throws SQLException {
		AbstractApplicationContext  context = new ClassPathXmlApplicationContext("app-conf.xml");
		Person person=(Person)context.getBean("person");
		System.out.println(person.getName());
		System.out.println(person.getAge());
		System.out.println(person.getLocation());
		context.registerShutdownHook();
	}
}  
Output
Ram
40
Delhi 

Reference

Class PropertyOverrideConfigurer

Download Source Code

POSTED BY
ARVIND RAI
ARVIND RAI










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