spring mvc one init binder for all controllers

I have 5 controllers and i would like to register an InitBinder to all of them.

I know i can add this code to each of them.

@InitBinder
public void initBinder(WebDataBinder binder)
{
    binder.registerCustomEditor(StringWrapper.class, new StringWrapperEditor());
}

But i would like to define it only once (even create a bean of StringWrapperEditor and use it instead of creating new every time.)

I searched SO and some other places but didn't find any answear. Is it even possible?

Im using spring 3.1.1 with java 1.6.

Implement a PropertyEditorRegistrar which registers all your custom PropertyEditors. Then in your configuration add a ConfigurableWebBindingInitializer which you hookup with the created PropertyEditorRegistrar and hook it to your HandlerAdapter.

public class MyPropertyEditorRegistrar implements PropertyEditorRegistrar {

    public void registerCustomEditors(PropertyEditorRegistry registry) {
         registry.registerCustomEditor(StringWrapper.class, new StringWrapperEditor());   
    }
}

If you have a <mvc:annotation-driven /> tag in your configuration, the problem is that with this tag you cannot add the WebBindingInitializer to the adapter next to that there is already a ConfigurableWebBindingInitializer added to the pre-configured HandlerAdapter. You can use a BeanPostProcessor to proces and configure the bean.

public class MyPostProcessor implements BeanPostProcessor {

    public Object postProcessBeforeInitialization(Object bean, String name) throws BeansException {
        if (bean instanceof RequestMappingHandlerAdapter) {
            WebBindingInitializer wbi = ((RequestMappingHandlerAdapter) bean).getWebBindingInitializer();
            if (wbi == null) {
                wbi = new ConfigurableWebBindingInitializer();
                ((RequestMappingHandlerAdapter) bean).setWebBindingInitializer(wbi);
            }

            if (wbi instanceof ConfigurableWebBindingInitializer) {
                ((ConfigurableWebBindingInitializer) wbi).setPropertyEditorRegistrar(new MyPropertyEditorRegistrar());
            }

        }
    }

}

Requires a bit of work but it is doable. You could also implement your own WebBindingInitializer.

If you don't have the tag you can simply manually configure a RequestMappingHandlerAdapter and wire everything together.

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