原文地址

js页面

$(document).ready(function () {
    $("#search-form").submit(function (event) {
        //stop submit the form, we will post it manually.
        event.preventDefault();
        fire_ajax_submit();
    });

});

function fire_ajax_submit() {
    var search = {}
    search["username"] = $("#username").val();
    //search["email"] = $("#email").val();
    $("#btn-search").prop("disabled", true);
    $.ajax({
        type: "POST",
        contentType: "application/json",
        url: "/api/search",
        data: JSON.stringify(search),
        dataType: 'json',
        cache: false,
        timeout: 600000,
        success: function (data) {
            var json = "<h4>Ajax Response</h4><pre>"
                + JSON.stringify(data, null, 4) + "</pre>";
            $('#feedback').html(json);
            console.log("SUCCESS : ", data);
            $("#btn-search").prop("disabled", false);
        },
        error: function (e) {
            var json = "<h4>Ajax Response</h4><pre>"
                + e.responseText + "</pre>";
            $('#feedback').html(json);
            console.log("ERROR : ", e);
            $("#btn-search").prop("disabled", false);
        }
    });
}

Controller类

 @PostMapping("/api/search")
    public ResponseEntity<?> getSearchResultViaAjax(@Valid @RequestBody SearchCriteria search, Errors errors) {

        AjaxResponseBody result = new AjaxResponseBody();

        //If error, just return a 400 bad request, along with the error message
        if (errors.hasErrors()) {

            result.setMsg(errors.getAllErrors().stream().map(x -> x.getDefaultMessage()).collect(Collectors.joining(",")));
            return ResponseEntity.badRequest().body(result);

        }

        List<User> users = userService.findByUserNameOrEmail(search.getUsername());
        if (users.isEmpty()) {
            result.setMsg("no user found!");
        } else {
            result.setMsg("success");
        }
        result.setResult(users);

        return ResponseEntity.ok(result);
    }

AjaxResponseBody类

@Data //import lombok.Data;
public class AjaxResponseBody {

    String msg;
    List<?> result;

}