Is there a way to map a Spring 3.0 MVC @RequestParam directly to a Java Bean?

Question

Can this somehow work? do I have to use @InitBinder somehow?

public String myActionHandler(ModelMap model, @RequestParam MyPojoBean myBean){
    ...
}

1. I'm sure I've seen this somewhere, but I'm not sure where. Is there a simple code example for this?

2. If the above is possible, how can I catch the exception if the request doesen't match the Bean?

Answer 1

You need to register a custom editor in initBinder :

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

class MyPojoEditor extends java.beans.PropertyEditorSupport {
    @Override public String getAsText () {...}
    @Override public void setAsText (String s) {...}
}

Answer 2

您可以使用@InitBinder （请参见@InitBinder的答案）来执行此操作，如果只需要针对单个类执行此操作，或者使用更通用的自定义WebArgumentResolver （请参见此其他问题 ），则最好。