标签: noclassdeffounderror

这是我用来从Java调用Scala方法的简单测试:

public static void main(String args[]) {
  java.util.Map<String, java.util.List<String>> rec = news.recommend.DriverObj.runTest();     
  System.out.println(rec.toString());
}

以下是Scala方法的定义:

def runTest: java.util.Map[String, java.util.List[String]] = {
  new java.util.HashMap[String, java.util.List[String]]
}

但它抛出一个错误:

Exception in thread "main" java.lang.NoClassDefFoundError: scala/Function1
    at news.recommend.DriverObj.runTest(DriverObj.scala)

我该怎么做才能让它顺利运行？

更新:我通过Eclipse运行它,我的构建路径包含:

那么应该找到Scala库？

我使用sitemesh来装饰页面.我正在使用JSP页面.页面工作正常,直到我使用<c:if>条件标签.我在WEB-INF/lib文件夹中有jstl-impl-1.2.jar和sitemesh-3.0-alpha-1.jar文件.我在jsp页面中有以下标记库声明:

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/sql" prefix="sql" %>

我正在使用带有java 6的tomcat 7.0.当我在eclipse中创建新的动态Web项目时,我将动态Web模块版本设置为2.4.页面有<c:set/>标签,它们工作正常,但是当我使用if条件标签时,我收到以下错误:

javax.servlet.ServletException: java.lang.NoClassDefFoundError: javax/servlet/jsp/jstl/core/ConditionalTagSupport
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:342)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
org.sitemesh.webapp.WebAppContext.dispatch(WebAppContext.java:158)
org.sitemesh.webapp.WebAppContext.decorate(WebAppContext.java:133)
org.sitemesh.BaseSiteMeshContext.decorate(BaseSiteMeshContext.java:39)
org.sitemesh.webapp.SiteMeshFilter.postProcess(SiteMeshFilter.java:74)
org.sitemesh.webapp.contentfilter.ContentBufferingFilter.bufferAndPostProcess(ContentBufferingFilter.java:175)
org.sitemesh.webapp.contentfilter.ContentBufferingFilter.doFilter(ContentBufferingFilter.java:126)
org.sitemesh.config.ConfigurableSiteMeshFilter.doFilter(ConfigurableSiteMeshFilter.java:157)

root cause

java.lang.NoClassDefFoundError: javax/servlet/jsp/jstl/core/ConditionalTagSupport
java.lang.ClassLoader.defineClass1(Native Method)
java.lang.ClassLoader.defineClassCond(Unknown Source)
java.lang.ClassLoader.defineClass(Unknown Source)
java.security.SecureClassLoader.defineClass(Unknown Source)
org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2820)
org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1150)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1645)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1523)
org.apache.jasper.compiler.Parser.parseCustomTag(Parser.java:1223)
org.apache.jasper.compiler.Parser.parseElements(Parser.java:1450)
org.apache.jasper.compiler.Parser.parse(Parser.java:138)
org.apache.jasper.compiler.ParserController.doParse(ParserController.java:242)
org.apache.jasper.compiler.ParserController.parse(ParserController.java:102)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:198)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:373)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:353)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:340)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:644)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:358)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:389)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:333)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
org.sitemesh.webapp.WebAppContext.dispatch(WebAppContext.java:158)
org.sitemesh.webapp.WebAppContext.decorate(WebAppContext.java:133)
org.sitemesh.BaseSiteMeshContext.decorate(BaseSiteMeshContext.java:39)
org.sitemesh.webapp.SiteMeshFilter.postProcess(SiteMeshFilter.java:74)
org.sitemesh.webapp.contentfilter.ContentBufferingFilter.bufferAndPostProcess(ContentBufferingFilter.java:175)
org.sitemesh.webapp.contentfilter.ContentBufferingFilter.doFilter(ContentBufferingFilter.java:126)
org.sitemesh.config.ConfigurableSiteMeshFilter.doFilter(ConfigurableSiteMeshFilter.java:157)

root cause

java.lang.ClassNotFoundException: …

我在/ usr/java /中解压缩了我的jdk.

我将CLASSPATH,PATH,JAVA_HOME放入/ etc/profile中,如下所示.

export JAVA_HOME=/usr/java/jdk1.7.0_21
export PATH=$PATH:$JAVA_HOME/bin
export CLASSPATH=$JAVA_HOME/jre/lib/ext:$JAVA_HOME/lib/tools.jar

当我在/usr/java/jdk1.0.7_21/bin中编译一些java文件时,

有用.但是当我在其他文件夹上做同样的事情时,却没有.

它显示NoClassDefFoundError.

所以我通过echo检查了ClASSPATH,PATH,JAVA_HOME.

它显示如下.

[root@localhost a]# echo $JAVA_HOME
/usr/java/jdk1.7.0_21
[root@localhost a]# echo $PATH
/usr/lib64/qt-3.3/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/guest/bin:/usr/java/jdk1.7.0_21/bin:/usr/java/bin:/usr/java/jdk1.7.0_21/bin
[root@localhost a]# echo $CLASSPATH
/usr/java/jdk1.7.0_21/jre/lib/ext:/usr/java/jdk1.7.0_21/lib/tools.jar

我想在控制台中使用java,我能做些什么呢？

提前致谢.

PS.我做了source /etc/profile.

=================我面临的错误=======================

当我命令java A(我的类名是A).

Error: Could not find or load main class A

case我命令java -cp/home/guest/workspace/AAA/src/a/A.

Exception in thread "main" java.lang.NoClassDefFoundError: A (wrong name: a/A)
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:791)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354) …

我收到了这个错误

Exception in thread "main" java.lang.NoClassDefFoundError: javafx/application/Ap
plication
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(Unknown Source)
        at java.security.SecureClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.access$100(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
Caused by: java.lang.ClassNotFoundException: javafx.application.Application
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        ... 13 more

尝试运行我的类文件时,这是源

import javafx.application.Application;
import javafx.fxml.FXMLLoader; …

有谁知道为什么会这样？我看到我的应用程序报告了这个崩溃,但我不知道它是什么.

java.lang.NoClassDefFoundError: android.app.ANRManagerProxy

Thread: Binder_3, Exception: java.lang.NoClassDefFoundError: android.app.ANRManagerProxy 
at android.app.ANRManagerNative.asInterface(ANRManagerNative.java:30) 
at android.app.ANRManagerNative$1.create(ANRManagerNative.java:94) 
at android.app.ANRManagerNative$1.create(ANRManagerNative.java:88)
at android.util.Singleton.get(Singleton.java:34) at android.app.ANRManagerNative.getDefault(ANRManagerNative.java:37) 
at android.os.MessageLogger.dump(MessageLogger.java:253) 
at android.app.ANRAppManager.dumpMessageHistory(SourceFile:38) 
at android.app.ActivityThread$ApplicationThread.dumpMessageHistory(ActivityThread.java:1176) 
at android.app.ApplicationThreadNative.onTransact(ApplicationThreadNative.java:609) 
at android.os.Binder.execTransact(Binder.java:351) 
at dalvik.system.NativeStart.run(Native Method)

我尝试了很多东西，但它不能解决我的问题。

完整错误代码（kompletter 错误代码）：

05-16 09:59:53.428 25010-25010/main.faseflex.de.fgnapp E/AndroidRuntime: FATAL EXCEPTION: main
Process: main.faseflex.de.fgnapp, PID: 25010
java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/android/gms/common/R$string;
    at com.google.android.gms.common.internal.StringResourceValueReader.<init>(Unknown Source:14)
    at com.google.firebase.FirebaseOptions.fromResource(Unknown Source:2)
    at com.google.firebase.FirebaseApp.initializeApp(Unknown Source:19)
    at com.google.firebase.provider.FirebaseInitProvider.onCreate(Unknown Source:4)
    at android.content.ContentProvider.attachInfo(ContentProvider.java:1925)
    at android.content.ContentProvider.attachInfo(ContentProvider.java:1900)
    at com.google.firebase.provider.FirebaseInitProvider.attachInfo(Unknown Source:23)
    at android.app.ActivityThread.installProvider(ActivityThread.java:6578)
    at android.app.ActivityThread.installContentProviders(ActivityThread.java:6133)
    at android.app.ActivityThread.handleBindApplication(ActivityThread.java:6043)
    at android.app.ActivityThread.-wrap1(Unknown Source:0)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1764)
    at android.os.Handler.dispatchMessage(Handler.java:105)
    at android.os.Looper.loop(Looper.java:164)
    at android.app.ActivityThread.main(ActivityThread.java:6944)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)
 Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.android.gms.common.R$string" on path: DexPathList[[zip file "/data/app/main.faseflex.de.fgnapp-C4iBOV7sIO2cNc4pfCATmA==/base.apk"],nativeLibraryDirectories=[/data/app/main.faseflex.de.fgnapp-C4iBOV7sIO2cNc4pfCATmA==/lib/arm64, /system/lib64, /system/vendor/lib64]]
    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:93)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:379) …

我刚刚在我的App中遇到了一个尴尬的错误.

在我的Nexus 5/7上运行android 5.0.1/5.0.2,一切正常.但是,如果我尝试在具有早期版本(测试4.4.4和4.3)的设备上运行完全相同的代码,我会收到以下错误:

03-13 13:49:41.140  21714-21714/? E/dalvikvm? Could not find class 'com.default.package.application.model.Appcomponent', referenced from method com.default.package.application.controller.DatabaseHandler.getScreenComponents
03-13 13:49:41.140  21714-21714/? E/dalvikvm? Could not find class 'android.support.v7.app.ActionBarActivityDelegate$1', referenced from method android.support.v7.app.ActionBarActivityDelegate.<init>
03-13 13:49:41.140  21714-21714/? E/dalvikvm? Could not find class 'android.support.v7.app.ActionBarActivityDelegateHC', referenced from method android.support.v7.app.ActionBarActivityDelegate.createDelegate
03-13 13:49:41.140  21714-21714/? E/dalvikvm? Could not find class 'android.support.v7.app.ActionBarActivityDelegateBase', referenced from method android.support.v7.app.ActionBarActivityDelegate.createDelegate
03-13 13:49:41.150  21714-21714/? E/dalvikvm? Could not find class 'android.support.v7.app.ActionBarActivityDelegate$ActionBarDrawableToggleImpl', referenced from method android.support.v7.app.ActionBarActivityDelegate.getDrawerToggleDelegate
03-13 13:49:41.150  21714-21714/? E/dalvikvm? Could not find class 'android.support.v7.internal.view.SupportMenuInflater', referenced from …

我的文件目录:

project/src/m2mcom/entities/AutomatedTelnetClient.java
           /web/Simple.java           
           /org/apache/commons/net/telnet/TelnetClient.java 

Simple.java的源代码:

package m2mcom.web;
import m2mcom.entities.AutomatedTelnetClient;
import java.util.*;
import java.io.*;

public class Simple {
    public static void main(String [] args) {
        try {
            AutomatedTelnetClient telnet = new AutomatedTelnetClient();
            String answer = telnet.request();
            System.out.println(answer);
        } catch (Exception e) {
            System.err.println("Error");
        }
    }
}

当我执行Simple.class,没有任何编译错误时,我收到此错误消息:

C:\Users\Victor\Desktop\project2\src\m2mcom\web>java Simple
Exception in thread "main" java.lang.NoClassDefFoundError: Simple (wrong name: m
2mcom/web/Simple)

有谁知道如何解决这个问题？

我正在使用Spring Tool Suite在Spring上开发一个webapp.如果我使用IDE在所提供的Pivotal tc服务器上构建和部署应用程序,它就可以正常工作.但是,如果我执行手动"mvn clean package"构建并尝试将其部署到独立的Tomcat服务器(使用最新的Tomcat 7),则会引发以下异常:

2017-08-23 15:24:13 WARN  AnnotationConfigWebApplicationContext:551 - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'requestMappingHandlerAdapter' defined in org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter]: Factory method 'requestMappingHandlerAdapter' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mvcValidator' defined in org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: javax/el/ELManager
2017-08-23 15:24:13 ERROR DispatcherServlet:502 - Context initialization …

我已经完成了这个线程是什么原因以及NoClassDefFoundError和ClassNotFoundException之间有什么区别？ 这是一个在线程中具有max ups的ans之一: NoClassDefFoundError:"因此,当源成功编译时,似乎会发生 NoClassDefFoundError ,但是在运行时,找不到所需的类文件.这可能是在分发或生成JAR文件时可能发生的事情,其中​​并未包含所有必需的类文件."

ClassNotFoundException:对于ClassNotFoundException,它似乎可能源于尝试在运行时对类进行反射调用,但程序试图调用的类不存在.

我做了一个小实验.我创建了一个主类,类A,并尝试从中调用其他类,类B,编译成功.

然后我删除了在类A中调用的类B.我得到了 java.lang.ClassNotFoundException但是根据脚步中的答案,我应该得到NoClassDefFoundError(源代码已成功编译,但未找到运行时类文件)任何人都可以解释我在线程中对ans的解释中缺少什么？

package com.random;

public class A {

    public static void main(String[] args) {
        B b= new B();

    }

}

 package com.random;

public class B {



}