Spring REST API，将原始类型传递给控制器

Question

@CrossOrigin(origins = "http://localhost:3000")
@GetMapping("")
public ResponseEntity<List<ToDoItemViewModel>> loadCategoriesByName(@RequestParam(required = false) String name)
{
    List<ToDoItemViewModel> allItemsByCategoryName = toDoItemService.getAllItemsByCategoryName(name);
    return new ResponseEntity<>(allItemsByCategoryName, HttpStatus.OK);
}

How can i pass just a primitive type to the controller, here is how my $.ajax looks like

$.ajax({
    method: 'GET',
    url: "http://localhost:8080/todItems",
    contentType: 'application/json',
    crossDomain: true,
    data: 'Work',
    success: (resp) => {
        console.log(resp)
    },
    error: (resp) => {
        console.log(resp);
    }

})

Now when i debug it, it indeed sends the request to this controller, but the String name is always null for some reason, can you just show me what i have to adjust in my ajax request, it's probably something in the data field.

Answer 1

You are using GET Request with request params(@RequestParam annotation). @RequestParam means that param in request pass across url, like this;

http://localhost:8080/todItems?name=Work

So, you just need to move data to url params. If you prefer send data across request body, please do not use GET method, use POST instead. Many web servers are not supporting request body in GET Requests