当我尝试在laravel中使用ajax时，显示以下错误，

{“ message”：“”，“ exception”：“ Symfony \\ Component \\ HttpKernel \\ Exception \\ HttpException”，“ file”：“ C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Foundation \\ Exceptions \\ Handler.php“，” line“：203，” trace“：[{” file“：” C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Foundation \\ Exceptions \\ Handler.php “，” line“：175，” function“：” prepareException“，” class“：” Illuminate \\ Foundation \\ Exceptions \\ Handler“，” type“：”->“}，{” file“：” C：\\ xampp \\ htdocs \\ TravelAssistant \\ app \\ Exceptions \\ Handler.php“，” line“：49，” function“：” render“，” class“：” Illuminate \\ Foundation \\ Exceptions \\ Handler“，” type“：”->“ }，{“文件”：“ C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Routing \\ Pipeline.php”，“ line”：83，“ function”：“ render”，“ class “：”“ App \\ Exceptions \\ Handler”，“类型”：“->”}，{“文件”：“ C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Routing \\ Pipeline.php “，” line“：55，” function“：” handleException“，” class“：” Illuminate \\ Rout ing \\ Pipeline“，” type“：”->“}，{” file“：” C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ View \\ Middleware \\ ShareErrorsFromSession.php“，” line“：49，” function“：” Illuminate \\ Routing \\ {closure}“，” class“：” Illuminate \\ Routing \\ Pipeline“，” type“：”->“}，{” file“：” C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Pipeline \\ Pipeline.php“，” line“：151，” function“：” handle“，” class“：” Illuminate \\ View \\ Middleware \\ ShareErrorsFromSession“ ，“ type”：“->”}，{“ file”：“ C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Routing \\ Pipeline.php”，“ line”：53，“ function“：” Illuminate \\ Pipeline \\ {closure}“，” class“：” Illuminate \\ Pipeline \\ Pipeline“，” type“：”->“}，{” file“：” C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Session \\ Middleware \\ StartSession.php“，” line“：63，” function“：” Illuminate \\ Routing \\ {closure}“，” class“：” Illuminate \\ Routing \\ Pipeline“ ，“ type”：“->”}，{“ file”：“ C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ larave l \\ framework \\ src \\ Illuminate \\ Pipeline \\ Pipeline.php“，” line“：151，” function“：” handle“，” class“：” Illuminate \\ Session \\ Middleware \\ StartSession“，” type“：”-> “}，{”文件“：” C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Routing \\ Pipeline.php“，” line“：53，” function“：” Illuminate \\ Pipeline \\ {closure}“，” class“：” Illuminate \\ Pipeline \\ Pipeline“，” type“：”->“}，{” file“：” C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Cookie \\ Middleware \\ AddQueuedCookiesToResponse.php”，“行”：37，“功能”：“ Illuminate \\ Routing \\ {closure}”，“ class”：“ Illuminate \\ Routing \\ Pipeline”，“ type”：“-> “}，{” file“：” C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Pipeline \\ Pipeline.php“，” line“：151，” function“：” handle“，” class“：” Illuminate \\ Cookie \\ Middleware \\ AddQueuedCookiesToResponse“，” type“：”->“}，{” file“：” C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Routing \\ Pipeline.php”，“行”：53，“功能”：“ Illuminate \\ Pipeline \\ {closure}“，” class“：” Illuminate \\ Pipeline \\ Pipeline“，” type“：”->“}，{” file“：” C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Cookie \\ Middleware \\ EncryptCookies.php”，“行”：59，“功能”：“ Illuminate \\ Routing \\ {closure}”，“类”：“ Illuminate \\ Routing \\ Pipeline”，“类型”：“-> “}，{” file“：” C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Pipeline \\ Pipeline.php“，” line“：151，” function“：” handle“，” class“：” Illuminate \\ Cookie \\ Middleware \\ EncryptCookies“，” type“：”->“}，{” file“：” C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Routing \\ Pipeline.php“，” line“：53，” function“：” Illuminate \\ Pipeline \\ {closure}“，” class“：” Illuminate \\ Pipeline \\ Pipeline“，” type“：”->“}，{”文件“：”“ C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Pipeline \\ Pipeline.php”，“ line”：104，“ function”：“ Illuminate \\ Routing \\ {closure}”，“ class“：” Illuminate \\ Routing \\ Pipeline“，” type“：”->“}，{” file“：” C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Routing \\ Router.php”，“行”：667，“功能”：“然后”，“类”：“ Illuminate \\ Pipeline \\ Pipeline”，“类型”：“-> “}，{” file“：” C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Routing \\ Router.php“，” line“：642，” function“：” runRouteWithinStack“，” class“：” Illuminate \\ Routing \\ Router“，” type“：”->“}，{” file“：” C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Routing \\ Router。 php”，“行”：608，“功能”：“ runRoute”，“类”：“ Illuminate \\ Routing \\ Router”，“类型”：“->”}，{“文件”：“ C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Routing \\ Router.php“，” line“：597，” function“：” dispatchToRoute“，” class“：” Illuminate \\ Routing \\ Router“，” type“ ：“->”}，{“文件”：“ C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Foundation \\ Http \\ Kernel.php”，“行”：176，“功能” ：“调度”，“类别”：“ Illuminate \\ Routing \\ Router”，“类型”：“->”}，{“文件”：“ C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Routing \\ Pipeline.php“，” line“：30，” function“：” Illuminate \\ Foundation \\ Http \\ {closure}“，” class“：” Illuminate \\ Foundation \\ Http \\内核”，“类型”：“->”}，{“文件”：“ C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ fideloper \\ proxy \\ src \\ TrustProxies.php”，“行”：57，“功能” ：“ Illuminate \\ Routing \\ {closure}”，“ class”：“ Illuminate \\ Routing \\ Pipeline”，“ type”：“->”}，{“ file”：“ C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Pipeline \\ Pipeline.php”，“行”：151，“功能”：“句柄”，“类”：“ Fideloper \\ Proxy \\ TrustProxies”，“类型”：“->”} ，{“ file”：“ C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Routing \\ Pipeline.php”，“ line”：53，“ function”：“ Illuminate \\ Pipeline \\ {closure }“，” class“：” Illuminate \\ Pipeline \\ Pipeline“，” type“：”->“}，{” file“：” C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Foundation \\ Http \\ Middleware \\ TransformsRequest.php“，” line“：31，” function“：” Illuminate \\ Routing \\ {closure}“，” class“：” Illuminate \\ Routing \\ Pipeline“，” type“：”->“}，{” file“：” C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Pipeline \\ Pipeline。 php“，” line“：151，” function“：” handle“，” class“：” Illuminate \\ Foundation \\ Http \\ Middleware \\ TransformsRequest“，” type“：”->“}，{” file“：” C ：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Routing \\ Pipeline.php“，” line“：53，” function“：” Illuminate \\ Pipeline \\ {closure}“，” class“：” Illuminate \\ Pipeline \\ Pipeline“，” type“：”->“}，{” file“：” C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Foundation \\ Http \\ Middleware \\ TransformsRequest。 php“，” line“：31，” function“：” Illuminate \\ Routing \\ {closure}“，” class“：” Illuminate \\ Routing \\ Pipeline“，” type“：”->“}，{” file“： “ C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Pipeline \\ Pipeline.php”，“ line”：151，“ function”：“ handle”，“ class”：“ Illuminate \\ Foundation \\ Http \\ Middleware \\ TransformsRequest“，” type“：”->“}，{” file“：” C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Routing \\ Pipeline.php“，” line“：53，” function“：” Illuminate \\ Pipeline \\ {closure}“，” class“：” Illuminate \\ Pipeline \\ Pipeline“ ，“ type”：“->”}，{“ file”：“ C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Foundation \\ Http \\ Middleware \\ ValidatePostSize.php”，“行” ：27，“ function”：“ Illuminate \\ Routing \\ {closure}”，“ class”：“ Illuminate \\ Routing \\ Pipeline”，“ type”：“->”}，{“ file”：“ C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Pipeline \\ Pipeline.php“，” line“：151，” function“：”句柄“，” class“：” Illuminate \\ Foundation \\ Http \\ Middleware \\ ValidatePostSize“ ，“ type”：“->”}，{“ file”：“ C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Routing \\ Pipeline.php”，“ line”：53，“ function“：” Illuminate \\ Pipeline \\ {closure}“，” class“：” Illuminate \\ Pipeline \\ Pipeline“，” type“：”->“}，{” file“：” C：\\ xampp \\ htdocs \\ TravelAssistant \\供应商\\ laravel \\ framework \\ src \\ Illuminate \\ Foundation \\ Http \\ Middleware \\ CheckFo rMaintenanceMode.php“，” line“：62，” function“：” Illuminate \\ Routing \\ {closure}“，” class“：” Illuminate \\ Routing \\ Pipeline“，” type“：”->“}，{”文件“：”“ C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Pipeline \\ Pipeline.php”，“ line”：151，“ function”：“ handle”，“ class”：“ Illuminate \\ Foundation \\ Http \\ Middleware \\ CheckForMaintenanceMode“，”类型“：”->“}，{”文件“：” C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Routing \\ Pipeline.php“ ，“行”：53，“功能”：“ Illuminate \\ Pipeline \\ {closure}”，“ class”：“ Illuminate \\ Pipeline \\ Pipeline”，“ type”：“->”}，{“ file”：“ C ：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Pipeline \\ Pipeline.php“，” line“：104，” function“：” Illuminate \\ Routing \\ {closure}“，” class“：” Illuminate \\ Routing \\ Pipeline“，” type“：”->“}，{” file“：” C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Foundation \\ Http \\ Kernel.php“ ，“行”：151，“功能”：“然后”，“类”：“ Illuminate \\ Pipeline \\ Pipeline”，“类型”： “->”}，{“文件”：“ C：\\ xampp \\ htdocs \\ TravelAssistant \\ vendor \\ laravel \\ framework \\ src \\ Illuminate \\ Foundation \\ Http \\ Kernel.php”，“行”：116，“功能”： “ sendRequestThroughRouter”，“类”：“ Illuminate \\ Foundation \\ Http \\ Kernel”，“ type”：“->”}，{“ file”：“ C：\\ xampp \\ htdocs \\ TravelAssistant \\ public \\ index.php”， “行”：55，“函数”：“句柄”，“类”：“ Illuminate \\ Foundation \\ Http \\ Kernel”，“类型”：“->”}，{“文件”：“ C：\\ xampp \\ htdocs \\ TravelAssistant \\ server.php“，” line“：21，” function“：” require_once“}]}

我的控制器代码是

public function getPublicAttraction(Request $request)
    {
        return response(['msg'=>'success']);
    }

阿贾克斯电话，

<script>
    function getAttraction()
    {

        var pass= {'_token':$('meta[name="csrf-token"]').attr('content')

    };
    $.ajax({
            type:'POST',
            url:'{{route("Attractions")}}',
            datatype:'json',
            data: pass,
            success:function(data){
                $("#public_attractions").html(data.msg);
            }
        }).fail(function(jqXHR, textStatus, error){
            $("#public_attractions").html(jqXHR.responseText);
        });


    }
    $(document).ready(function(){
         getAttraction();
    });
</script>

带有csrf令牌的元标记，

<meta name="csrf-token" content="!!{csrf_token()}!!">

路由文件web.php条目，

Route::post('/getAttractions','AjaxController@getPublicAttraction')->name('Attractions');

我想我被困住了，请帮忙。

为什么要重新发明行之有效的东西。

刀片中的第一个令牌应如下所示：（无论出于何种原因，您都有额外的!!）

<meta name="csrf-token" content="{{ csrf_token() }}">

2nd将此代码放在主刀片中的某个位置：

$.ajaxSetup({
    headers: {
        'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
    }
});

来源https://laravel.com/docs/5.7/csrf#csrf-x-csrf-token

好的，除了CSRF元标记的方式外，其他一切看起来都不错，因为您不需要转义csrf令牌中的任何内容，因此打印令牌的正确方法将是： <!-- CSRF Token --> <meta name="csrf-token" content="{{ csrf_token() }}"> Token- <!-- CSRF Token --> <meta name="csrf-token" content="{{ csrf_token() }}">这是我无法给您的最佳猜测，因为您没有提供响应的HTTP状态是什么，也不提供抛出异常的哪种情况，异常消息也为空所以..