Read array of [Object object] elements in Java

Question

I want to send an array of objects to my backend. I use axios for this. The backend is called but I only get an array of [Object object] elements.

Frontend:

Backend:

@PostMapping("/neuerEintrag")
public String neuerEintrag(HttpServletRequest req, @RequestParam("zugeordnet") List<?> 
zugeordnet,..) {

....

}

Result in Backend:

[[object Object], [object Object]]

Answer 1

You're trying to send an object instead of a JSON string. If the object you're trying to send is in the variable data , you'll need to wrap it in JSON.stringify where you use it within the axios call

JSON.stringify(data)