How Can I Bind a Complex Object as a GET @RequestParam in Spring MVC?

Spring MVC: Binding Complex Objects as GET @RequestParam

Problem:

Consider a scenario where you have a page listing objects from a table. You need to add a form to filter the table using Ajax GET requests sent to a URL similar to:

http://foo.com/system/controller/action?page=1&prop1=x&prop2=y&prop3=z

Instead of using numerous @RequestParam parameters on the controller method, you'd like to bind the entire filter object directly.

Example:

Assuming you have a MyObject class defined as:

public class MyObject {
    private String prop1;
    private String prop2;
    private String prop3;

    // Getters and setters
    // ...
}

Your ideal controller method would look like this:

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

Solution:

Spring provides the capability to bind complex objects as @RequestParam parameters. To achieve this, simply remove the @RequestParam annotation from your method argument:

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

Spring will automatically bind the request parameters to your MyObject instance.

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