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SpEl - Spring expression language - why?

OwenM · 2013-09-25 11:08:50

I'm learning about this at the moment and I'm a bit puzzled. One of the main reasons for Spring is to simplify, decouple and make classes testable. If you then go and put a pile of logic into an xml file using this language - how do you test this? Are you not just moving/recreating/hiding the problem? Opinions please. Rds,…

25-09-2013 11:08am

#1

OwenM

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I'm learning about this at the moment and I'm a bit puzzled.

One of the main reasons for Spring is to simplify, decouple and make classes testable. If you then go and put a pile of logic into an xml file using this language - how do you test this? Are you not just moving/recreating/hiding the problem?

Opinions please.

Rds,
Owen.

0

Comments

#2 26-09-2013 12:09am
onemorechance

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Don't put a pile of logic into an XML file!

Here is an example of where the SpEL is useful:
<bean id="taxCalculator" class="org.spring.samples.TaxCalculator"> <property name="defaultLocale" value="#{ systemProperties['user.region'] }"/>  </bean>

Reference: http://docs.spring.io/spring/docs/3.0.x/reference/expressions.html#expressions-beandef

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