bootstrap中怎么设置表单必填

<form action="" method="POST" role="form" id="form-test">                <legend>Form title</legend>                 <div class="form-group">                    <label for="">label</label>                    <input type="text" class="form-control" id="" name="text" placeholder="Input field">                </div>                   <button id="btn-test" class="btn btn-primary">Submit</button>            </form>

$(function () {            $("#form-test").bootstrapValidator({                live: 'disabled',//验证时机，enabled是内容有变化就验证（默认），disabled和submitted是提交再验证                excluded: [':disabled', ':hidden', ':not(:visible)'],//排除无需验证的控件，比如被禁用的或者被隐藏的                submitButtons: '#btn-test',//指定提交按钮，如果验证失败则变成disabled，但我没试成功，反而加了这句话非submit按钮也会提交到action指定页面                message: '通用的验证失败消息',//好像从来没出现过                feedbackIcons: {//根据验证结果显示的各种图标                    valid: 'glyphicon glyphicon-ok',                    invalid: 'glyphicon glyphicon-remove',                    validating: 'glyphicon glyphicon-refresh'                },                fields: {                    text: {                        validators: {                            notEmpty: {//检测非空,radio也可用                                message: '文本框必须输入'                            },                            stringLength: {//检测长度                                min: 6,                                max: 30,                                message: '长度必须在6-30之间'                            },                            regexp: {//正则验证                                regexp: /^[a-zA-Z0-9_\.]+$/,                                message: '所输入的字符不符要求'                            },                            remote: {//将内容发送至指定页面验证，返回验证结果，比如查询用户名是否存在                                url: '指定页面',                                message: 'The username is not available'                            },                            different: {//与指定文本框比较内容相同                                field: '指定文本框name',                                message: '不能与指定文本框内容相同'                            },                            emailAddress: {//验证email地址                                message: '不是正确的email地址'                            },                            identical: {//与指定控件内容比较是否相同，比如两次密码不一致                                field: 'confirmPassword',//指定控件name                                message: '输入的内容不一致'                            },                            date: {//验证指定的日期格式                                format: 'YYYY/MM/DD',                                message: '日期格式不正确'                            },                            choice: {//check控件选择的数量                                min: 2,                                max: 4,                                message: '必须选择2-4个选项'                            }                        }                    }                }            });            $("#btn-test").click(function () {//非submit按钮点击后进行验证，如果是submit则无需此句直接验证                $("#form-test").bootstrapValidator('validate');//提交验证                if ($("#form-test").data('bootstrapValidator').isValid()) {//获取验证结果，如果成功，执行下面代码                    alert("yes");//验证成功后的操作，如ajax                }            });        });