最近在调试RESTful API示例时，出现以下错误：
1 { 2 ????"name": "Exception", 3 ????"message": "Class yii/web/JsonParser does not exist", 4 ????"code": -1, 5 ????"type": "ReflectionException", 6 ????"file": "/Users/Desktop/workspaces/php/yii2-ims/vendor/yiisoft/yii2/di/Container.php", 7 ????"line": 426, 8 ????"stack-trace": [ 9 ????????"#0 /Users/Desktop/workspaces/php/yii2-ims/vendor/yiisoft/yii2/di/Container.php(426): ReflectionClass->__construct(‘yii/web/JsonPar...‘)",10 ????????"#1 /Users/Desktop/workspaces/php/yii2-ims/vendor/yiisoft/yii2/di/Container.php(364): yii\\di\\Container->getDependencies(‘yii/web/JsonPar...‘)",11 ????????"#2 /Users/Desktop/workspaces/php/yii2-ims/vendor/yiisoft/yii2/di/Container.php(156): yii\\di\\Container->build(‘yii/web/JsonPar...‘, Array, Array)",12 ????????"#3 /Users/Desktop/workspaces/php/yii2-ims/vendor/yiisoft/yii2/BaseYii.php(345): yii\\di\\Container->get(‘yii/web/JsonPar...‘, Array)",13 ????????"#4 /Users/Desktop/workspaces/php/yii2-ims/vendor/yiisoft/yii2/web/Request.php(531): yii\\BaseYii::createObject(‘yii/web/JsonPar...‘)",14 ????????"#5 /Users/Desktop/workspaces/php/yii2-ims/vendor/yiisoft/yii2/rest/CreateAction.php(51): yii\\web\\Request->getBodyParams()",15 ????????"#6 [internal function]: yii\\rest\\CreateAction->run()",16 ????????"#7 /Users/Desktop/workspaces/php/yii2-ims/vendor/yiisoft/yii2/base/Action.php(94): call_user_func_array(Array, Array)",17 ????????"#8 /Users/Desktop/workspaces/php/yii2-ims/vendor/yiisoft/yii2/base/Controller.php(157): yii\\base\\Action->runWithParams(Array)",18 ????????"#9 /Users/Desktop/workspaces/php/yii2-ims/vendor/yiisoft/yii2/base/Module.php(528): yii\\base\\Controller->runAction(‘create‘, Array)",19 ????????"#10 /Users/Desktop/workspaces/php/yii2-ims/vendor/yiisoft/yii2/web/Application.php(103): yii\\base\\Module->runAction(‘deptinfo/create‘, Array)",20 ????????"#11 /Users/Desktop/workspaces/php/yii2-ims/vendor/yiisoft/yii2/base/Application.php(386): yii\\web\\Application->handleRequest(Object(yii\\web\\Request))",21 ????????"#12 /Users/Desktop/workspaces/php/yii2-ims/api/web/index.php(10): yii\\base\\Application->run()",22 ????????"#13 {main}"23 ????]24 }其实，这是自己给自己挖的一个坑，结果把自己给陷进去了，下面是配置文件的代码：
‘request‘ => [ ???????????‘class‘ => ‘yii\web\Request‘, ???????????‘parsers‘ => [ ???????????????‘application/json‘ => ‘yii/web/JsonParser‘, ???????????], ???????],
问题就在于配置时将 “yii/web/JsonParser”写错了，正确的是 “yii\web\JsonParser”，命名空间应以反斜杠“\”分割，看似很小的问题，结果调试了很长时间才找到原因，所以在写代码配置的时候一定要认真仔细，以免被自己误导，浪费宝贵的时间。
解决yii2中 Class yii/web/JsonParser does not exist, ReflectionException问题
原文地址：https://www.cnblogs.com/goujian/p/8733469.html