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, Hibernate / JPA.
Wayan Saryada

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