java:
    @GetMapping("/data")
    @ResponseBody
    public String data(@RequestParam String hint) {
        System.out.println(search(hint));
        return search(hint) ;
    }
js:
            $.ajax({
                    url: 'data',
                    type: 'GET',
                    dataType: 'json',
                    contentType: 'application/json',
                    mimeType: 'application/json',
                data: {
                    hint: Value,
                },
                success: (function (data) {
                    console.log(data);
                })
                });