Spring MVC REST using @RequestBody List<?> returns HTTP 400 syntactically incorrect -

i using spring 4 + jackson 2 , have written functional post method using @requestbody on custom class. method has no trouble unmarshalling object.

@responsebody @requestmapping(value="store", method = requestmethod.post) public serviceresponse store(@requestbody customclass list) {     ... }  // request: { code: "a", amount: 200 } 

when attempted add method handle collection of same class instead, post requests returning following error.

http status 400: request sent client syntactically incorrect.

i note error typically occurs when json submitted not match entity class. however, doing submitting array of same object instead of object itself, has proven work.

@responsebody @requestmapping(value="store-bulk", method = requestmethod.post) public serviceresponse storebulk(@requestbody list<customclass> list) {     ... }  // request: [{ code: "a", amount: 200 }, { code: "b", amount: 400 }] 

am missing here?

in java, type information generics erased @ runtime, spring sees list<customclass> object list<object> object, cannot understand how parse it.

one of ways solve it, capture type information creating wrapper class list, this:

public class customclasslist extends arraylist<customclass> { }