Spring MVC controller custom parameter name - spring-mvc

Question

I have a Spring MVC controller. And I have in the method 50 parameters. All of the parameters have very specific name, for example: FOO[].
I don't want write 50 parameters in the method signature like this:
#RequestMapping(value = "/test", method = RequestMethod.POST)
#ResponseBody
public String test(
#RequestParam(value = "FOO[]") String foo,
#RequestParam(value = "BAR[]") String bar,
// Other 48 parameters
)
{
return "test";
}
I want to map all the parameters on the one object, I mean, I want to write a simple bean class with getter/setter and use it like method parameter.
But how can I set custom names to my class fields?
e.g.:
class FooBar {
#SomeAnnotation_for_binding_the_field_to_my_field_FOO[]
private String foo;
private String bar;
// Other 48 fields
// getters/setters
}

Answer 1

I know annotations are kinda cool, but think rationally. You HAVE to enumerate, in code, all the mappings. There is nothing implicit about mapping FOO[] to foo, it seems to be beyond your control. Just take the parameters as a map (you can always ask Spring to give you map of all parameters) and do something like:
#RequestMapping
public String test(#RequestParam Map<String, Object> map) {
MyObject mo = new MyObject();
mo.setFoo(map.get("FOO[]").toString());
mo.setBar(map.get("WOBBLE13[][]").toString);
return "whatever";
}
If you want to make this process more automatic, and if there exists an alorithm that maps parameter names to property names, you can use Spring's bean wrapper:
#RequestMapping
public String test(#RequestParam Map<String, String> map) {
BeanWrapper bw = new BeanWrapperImpl(new MyObject);
for (Entry<String, Object> entry : map.entrySet()) {
bw.setProperty(entry.getKey(), entry.getValue());
}
}
private static String decodeName(String n) {
return n.toLowerCase().substring(0,n.length() - 2);
}
You could make the process even more automatic by using a different Binder, you could (really, not a problem) add some custom annotations... but really, there is no point, if you just have a single case of 50 params. If you insist, add a comment.

Answer 2

THis sounds like a good time to use a hashmap, with key as the var name and value as value. Wrap that in a form backing object.

Answer 3

You could have a resource class i.e FooBarResource.jave and in your controller use that as a request body something like the following:
#ResponseBody
#RequestMapping(value = "/test", method = RequestMethod.POST)
#Secured({"ROLE_ADMIN"})
public ResponseEntity<ModelMap> createTest(#Valid #RequestBody FooBarResource body, UriComponentsBuilder builder) {