How to inject spring beans into a jsp 2.0 SimpleTag?

Question

Currently my jsp 2.0 tags that need spring beans use this code:

ac = WebApplicationContextUtils.getWebApplicationContext( servletContext);
ac.getBeansOfType(         


        

Answer 1

My first thought is, are you sure the calls to spring are expensive? This stuff is pretty heavily optimized, so make sure it's actually a problem before trying to optimize it.

Assuming it is a problem, then an alternative is the exposeContextBeansAsAttributes and exposedContextBeanNames properties of InternalResourceViewResolver. You can use one or the other (but not both) to expose some or all of your beans as JSP attributes.

This raises the possibly of actually injecting Spring beans into your tag classes. For example, in your Spring context you can have:

Your JSP:

SO if MyTag defines an attribute thing of type MyClass, the myBean spring bean should get injected as a normal JSP attribute.