classnotfoundexception

问题 I'm running a KeyCloak server to authenticate users which would like to gain access a SpringBoot-Web RestAPI. However, I an error occurs while trying to authenticate. The following works: When I access my http://localhost:8080/path/to/restapi I get presented with a login screen as expected: -- KeyCloak Login Screen When I click login the following error occurs on the redirect from within my browser: Whitelabel Error Page This application has no explicit mapping for /error, so you are seeing

问题 I'm running a KeyCloak server to authenticate users which would like to gain access a SpringBoot-Web RestAPI. However, I an error occurs while trying to authenticate. The following works: When I access my http://localhost:8080/path/to/restapi I get presented with a login screen as expected: -- KeyCloak Login Screen When I click login the following error occurs on the redirect from within my browser: Whitelabel Error Page This application has no explicit mapping for /error, so you are seeing

问题 I want to add 3rd party external jar into my maven repository. My project is in Spring Boot. Error : `Exception in thread "main" java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner .java

问题 we are trying to deploy code to a FRC robot with VScode, but we keep getting the error: Error: Could not find or load main class org.gradle.wrapper.GradleWrapperMain Caused by: java.lang.ClassNotFoundException: org.gradle.wrapper.GradleWrapperMain The terminal process terminated with exit code: 1 we have found that other people have also gotten similar errors, but none of their solutions have helped us. We would really appreciate any help resolving this error Thanks 回答1: I assume you are

问题 I'm trying to connect to a DB2 database using JDBC. Therefore I downloaded the DB2 driver db2jcc.jar and added the path to the classpath while compiling and running my application (I'm not using an IDE). The following is the source of my Test-Application: import java.sql.*; public class TestApp { public static void main(String[] args){ try { Class.forName("com.ibm.db2.jcc.DB2Driver"); } catch (Exception e) { System.out.println(e); } } } Does anybody know, where my problem is? 回答1: Try

问题 I am having error on every support design widget. Like the recyclerview, coordinator layout etc. Everytime, I add a support design widget it is showing java.lang.ClassNotFoundException: android.view.View$OnUnhandledKeyEventListener on layout issue section. I'm using api 28.0.0-rc01, gradle 4.4 android 3.1.4. Here, is my build.gradle (app) file apply plugin: 'com.android.application' android { compileSdkVersion 28 defaultConfig { applicationId "com.example.android.test5test" minSdkVersion 23

问题 I am having error on every support design widget. Like the recyclerview, coordinator layout etc. Everytime, I add a support design widget it is showing java.lang.ClassNotFoundException: android.view.View$OnUnhandledKeyEventListener on layout issue section. I'm using api 28.0.0-rc01, gradle 4.4 android 3.1.4. Here, is my build.gradle (app) file apply plugin: 'com.android.application' android { compileSdkVersion 28 defaultConfig { applicationId "com.example.android.test5test" minSdkVersion 23

问题 I am trying to add deeplinking feature to my project. My code in Androidmanifest.xml <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0" package="com.companyname.sample"> <uses-sdk android:minSdkVersion="15" /> <application android:label="sample.Android"> <activity android:icon="@drawable/icon" android:name="sample.Droid.MainActivity" android:label="sample"> <intent-filter> <data android

问题 When I update the bean: <bean id="viewResolver" class="org.springframework.web.servlet.view.velocity.VelocityViewResolver"> <property name="cache" value="true"/> <property name="prefix" value=""/> <property name="suffix" value=".vm"/> <property name="toolboxConfigLocation" value="tools.xml" /> </bean> With the tools.xml path for Velocity Tools, I get: Caused by: java.lang.ClassNotFoundException: org.apache.velocity.tools.view.ToolboxManager I've tried plugging in tools version 2 and 1.4,

问题 When I update the bean: <bean id="viewResolver" class="org.springframework.web.servlet.view.velocity.VelocityViewResolver"> <property name="cache" value="true"/> <property name="prefix" value=""/> <property name="suffix" value=".vm"/> <property name="toolboxConfigLocation" value="tools.xml" /> </bean> With the tools.xml path for Velocity Tools, I get: Caused by: java.lang.ClassNotFoundException: org.apache.velocity.tools.view.ToolboxManager I've tried plugging in tools version 2 and 1.4,