The SpringBoot form is saved

How to submit this form to the back end, store it in the database, change the code, thank you!

Here's how I wrote it, but I can't figure it out. Only store this data together in the database!!

<form class="form-horizontal m" id="form-overallevaluation-add">
        <div class="row">
            <div class="col-sm-12">
                <div class="ibox float-e-margins">
                    <div class="ibox-title">
                        <h3>综合素质自评</h3>
                    </div>
                    <div class="ibox-content">
                        <table class="table">
                            <thead>
                            <tr>
                                <th scope="col" class="text-center" style="font-weight: bold;font-size: 18px;width: 100px;"><div class="alert alert-success" style="margin-bottom: 5px;">序号 </div></th>
                                <th scope="col" class="text-center" style="font-weight: bold;font-size: 18px;"><div class="alert alert-success " style="margin-bottom: 5px;">评价内容</div></th>
                                <th scope="col" class="text-center" style="font-weight: bold;font-size: 18px;width: 130px;"><div class="alert alert-success" style="margin-bottom: 5px;">学生自评</div></th>
                            </tr>
                            </thead>
                            <tr th:each="qitem,item:${qlist}">
                                <td class="text-center" scope="row"><div class="tdstyle alert  alert-info"><span th:text="${item.index+1}"></span></div></td>
                                <td><div class="tdstyle alert  alert-info "><span th:id="'question_'+${qitem.itemid}" th:text="${qitem.itemTitle}"></span></div></td>
                                <td><div class="tdstyle alert  alert-info">


                                    <select th:id="'question_'+${qitem.itemid}+'_option'"  name="selfAssessment" class="form-control m-b" th:with="type=${@dict.getType('system_rank')}">
                                        <option  th:attr="data-id=${qitem.itemid}" th:each="dict : ${type}" th:text="${dict.dictLabel}" th:value="${dict.dictValue}"></option>
                                    </select>
                                </div></td>
                            </tr>
                            </tbody>
                        </table>
                    </div>
                </div>
            </div>
        
        <a class="btn btn-primary btn-rounded btn-block" href="javascript:void(0)" onclick="submitData()"><i class="fa fa-info-circle"></i> 提交</a>
    </form>
let obj = $('#form-overallevaluation-add').serialize();
        console.log(obj)
       $.post(prefix + "/submitOptions", obj, function(result) {
            console.log(result)
            if (result.code == web_status.SUCCESS) {
                $.modal.msgSuccess("提交成功")
                $.modal.close();
            } else {
                $.modal.msgError(result.msg);
            }
        });

@PostMapping("/submitOptions")
    @ResponseBody
    public AjaxResult submitOptions(@RequestParam String semester,@RequestParam String options){
        System.out.println(semester);
        System.out.println(options);
        String[] selectoptions = options.split("&");
        for(int i = 0 ;i <= selectoptions.length -1;i++){
            String[] test = selectoptions[i].split("=");
            String qidstr = test[1].replace("\"", "");
            System.out.println(qidstr);
        }
        return AjaxResult.success();
    }