Using Spring's namespace p assembly properties-excerpt from the Spring Combat (3rd edition)

Assembling values and references for bean properties using the <property> element is not too complex. However, Spring's namespace P provides a way to assemble another bean property without the need to configure so many angle brackets.

The schema URL for the namespace P is http://www.springframework.org/schema/p. If you want to use the namespace p, simply add the following statement to the XML configuration of spring:

<? XML version= "1.0" encoding= "UTF-8" ?> <  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 " >

(The above link may be wrong for hand, please check when copying)

With this declaration, we can now use P: as the prefix for all attributes of the <bean> element to assemble the bean's properties.

To demonstrate, I used the property to declare a bean and use the namespace p to declare a bean to compare it.

Property :<BeanID= "Kenny"class= "Com.springinaction.springidol.Instrumentalist">    < Propertyname= "Song"value= "Jingle Bells"/>    < Propertyname= "instrument"ref= "Piano"/></Bean>P Namespace:<BeanID= "Kenny"class= "Com.springinaction.springidol.Instrumentalist"P:song= "Jingle Bells"P:instrument-ref= "Piano"/>

The value of the P:song property is set to "Jingle Bells", which will be used to assemble the song property. Similarly, the value of the P:instrument-ref property is set to "Piano", a bean with ID piano is used to assemble the instrument attribute, and the-ref suffix is used as an identity to tell spring to assemble a reference rather than a literal.

Select <property> or namespace p depending on you, they are equivalent. The main advantage of the namespace P is that it is more concise.

Using Spring's namespace p assembly properties-excerpt from the Spring Combat (3rd edition)