How Can I Bind a Complex Object to GET Request Parameters in Spring MVC?

Spring MVC: Binding Complex Objects as GET Request Parameters

Spring MVC offers flexible request handling capabilities, allowing developers to bind query parameters to complex objects. This article addresses a specific scenario where a form is used to filter data displayed on a table, sending the filter criteria as GET parameters via Ajax.

By default, Spring expects request parameters to be mapped to individual method arguments annotated with @RequestParam. However, in this case, the desired mapping involves an entire complex object, MyObject.

To achieve this, one can simply remove the @RequestParam annotation from the MyObject parameter. Spring will then automatically bind the request parameters to the properties of MyObject. The updated method signature would be:

@RequestMapping(value = "/action")
public @ResponseBody List<MyObject> myAction(
    @RequestParam(value = "page", required = false) int page,
    MyObject myObject)

This approach leverages Spring's powerful data binding capabilities, which simplify the process of parsing and mapping complex objects from HTTP requests. By removing the @RequestParam annotation, Spring is effectively instructed to treat MyObject as a single unit, binding its properties to the corresponding request parameters.

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