How do I wire properties with Spring’s p namespace?

Beside using the <property> element, Spring framework also provide us another way to wiring value or reference into the bean. We can use the Spring’s p namespaces. The p namespace has a schema URI of http://www.springframework.org/schema/p.

With this namespace declared in the Spring configuration file you can use the p: prefixed attribute of the <bean> element to wire bean’s property.

We update the configuration used in the previous example How do I inject into bean properties? to use the p namespace. Here is the new Spring’s configuration file.

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:p="http://www.springframework.org/schema/p"
       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="rectangle" class="org.kodejava.example.spring.inject.Rectangle"/>

    <bean id="drawingBean"
          class="org.kodejava.example.spring.inject.DrawingBean"
          p:colour="Red" p:shape-ref="rectangle"/>

</beans>

The p:color attribute set the color property to Red, this is a simple value. To set the shape property we use the p:shape-ref attribute. The -ref suffix tell Spring that we are injecting a reference.

You can use the <property> element or using the p namespace to inject bean’s property. Both of them have the same functionality.

Wayan Saryada

Wayan Saryada

A programmer, runner, recreational diver, currently living in the island of Bali, Indonesia. Mostly programming in Java, creating web based application with Spring Framework, JPA, etc. If you need help on Java programming you can hire me on Fiverr.
Wayan Saryada

Leave a Reply