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Upgrading to Spring 3.1

08.07.2012
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A few days ago I thought that it was about time to upgrade my sample code to Spring 3.1, after all it’s been around for a respectable amount of time and has a couple of bug fix releases.

Upgrading to Spring 3.1 is very simple of upgrading your Maven version number and rebuilding, something like this:

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>3.1.2.RELEASE</version>
</dependency>

After recompiling you’ll probably find a whole bunch of newly deprecated classes such as XmlBeanFactory, which has been deprecated in favour of DefaultListableBeanFactory so,
    Resource resource = new ClassPathResource("example2.xml");
    return new XmlBeanFactory(resource);

becomes

    Resource resource = new ClassPathResource("example2.xml");

    DefaultListableBeanFactory beanFactory = new DefaultListableBeanFactory();
    BeanDefinitionReader reader = new XmlBeanDefinitionReader(beanFactory);
    reader.loadBeanDefinitions(resource);

For a full list of deprecated classes http://static.springsource.org/spring/docs/3.1.x/javadoc-api/deprecated-list.html

The next thing to do is option, but a good idea is to change your Spring XML headers from 3.0 to 3.1 so that the XML schema’s referenced end in -3.1.xsd. For example:

http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

becomes

http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd

The easiest way of doing this is to use eclipse’s global replace to replace to change -3.0.xsd with -3.1.xsd, but have a quick check first before your do this...

The reason for updating your schema’s is to take advantage of Spring’s new features, but more on that later...
Published at DZone with permission of Roger Hughes, author and DZone MVB. (source)

(Note: Opinions expressed in this article and its replies are the opinions of their respective authors and not those of DZone, Inc.)

Comments

Rob Connell replied on Wed, 2012/08/08 - 5:54pm

I was just getting into the article and then it stopped ....

Roger Hughes replied on Fri, 2012/08/10 - 5:48am in response to: Rob Connell

That's because it's in several parts. The next part is currently available here, and will shortly be available on Javalobby.

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