jsp頁面顯示不了

這個是我瀏覽器端發送的請求，http://localhost:8080/greenWisdom/pages/upload.jsp

最終顯示結果確實這樣的

HTTP Status 500 - java.lang.LinkageError: loader constraint violation: when resolving method "org.apache.jasper.runtime.InstanceManagerFactory.getInstanceManager(Ljavax/servlet/ServletConfig;)Lorg/apache/tomcat/InstanceManager;" the class loader (instance of org/apache/jasper/servlet/JasperLoader) of the current class, org/apache/jsp/pages/upload_jsp, and the class loader (instance of org/apache/catalina/loader/StandardClassLoader) for resolved class, org/apache/jasper/runtime/InstanceManagerFactory, have different Class objects for the type org/apache/tomcat/InstanceManager used in the signature

無語了，網上都說是jar包的衝突，但是我的jar包就這麼多

唯一相同的包就是servlet-api.jar，但是這個沒衝突啊，我也是醉了