获取“java.lang.ClassNotFoundException：javax.servlet.http.HttpServlet”在 Eclipse 中jboss 5.1.0

Question

我正在尝试让一个简单的 RestEasy 项目在 Eclipse（使用 Jboss Tools）和 Jboss 5.1.0 中工作。首先，我创建了一个简单的动态 Web 项目。在项目中，我在 WEB-INF/web.xml 中包含以下内容：

<context-param>
    <param-name>resteasy.scan</param-name>
    <param-value>true</param-value>
</context-param>
<listener>
    <listener-class>org.jboss.resteasy.plugins.server.servlet.ResteasyBootstrap</listener-class>
</listener>

<servlet>
    <servlet-name>Resteasy</servlet-name>
    <servlet-class>org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher</servlet-class>
</servlet>

<servlet-mapping>
    <servlet-name>Resteasy</servlet-name>
    <url-pattern>/*</url-pattern>
</servlet-mapping>

在尝试启动上述项目（在 Eclipse 中运行的 Jboss 中）时，我在控制台中收到以下异常：

14:10:17,614 ERROR [AbstractKernelController] Error installing to Real: name=vfsfile:/Users/groove/Documents/workspace/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_5.1_Runtime_Server1326046666357/deploy/blankWeb.war/ state=PreReal mode=Manual requiredState=Real
org.jboss.deployers.spi.DeploymentException: Error during deploy: vfsfile:/Users/groove/Documents/workspace/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_5.1_Runtime_Server1326046666357/deploy/blankWeb.war/
at org.jboss.deployers.spi.DeploymentException.rethrowAsDeploymentException(DeploymentException.java:49)
at org.jboss.deployers.plugins.deployers.DeployerWrapper.deploy(DeployerWrapper.java:185)
at org.jboss.deployers.plugins.deployers.DeployersImpl.doDeploy(DeployersImpl.java:1454)
at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1172)
at org.jboss.deployers.plugins.deployers.DeployersImpl.install(DeployersImpl.java:1113)
at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:348)
at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:1652)
at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:938)
at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1082)
at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:988)
at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:826)
at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:556)
at org.jboss.deployers.plugins.deployers.DeployersImpl.process(DeployersImpl.java:789)
at org.jboss.deployers.plugins.main.MainDeployerImpl.process(MainDeployerImpl.java:699)
at org.jboss.system.server.profileservice.repository.MainDeployerAdapter.process(MainDeployerAdapter.java:117)
at org.jboss.system.server.profileservice.hotdeploy.HDScanner.scan(HDScanner.java:409)
at org.jboss.system.server.profileservice.hotdeploy.HDScanner.run(HDScanner.java:294)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:204)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:680)
Caused by: java.lang.NoClassDefFoundError: javax/servlet/http/HttpServlet
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:295)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at org.jboss.classloader.plugins.loader.ClassLoaderToLoaderAdapter.loadClass(ClassLoaderToLoaderAdapter.java:188)
at org.jboss.classloader.spi.base.ClassLoadingTask$ThreadTask.run(ClassLoadingTask.java:455)
at org.jboss.classloader.spi.base.ClassLoaderManager.nextTask(ClassLoaderManager.java:267)
at org.jboss.classloader.spi.base.ClassLoaderManager.process(ClassLoaderManager.java:166)
at org.jboss.classloader.spi.base.BaseClassLoaderDomain.loadClass(BaseClassLoaderDomain.java:276)
at org.jboss.classloader.spi.base.BaseClassLoaderDomain.loadClass(BaseClassLoaderDomain.java:1138)
at org.jboss.classloader.spi.base.BaseClassLoader.loadClassFromDomain(BaseClassLoader.java:862)
at org.jboss.classloader.spi.base.BaseClassLoader.doLoadClass(BaseClassLoader.java:502)
at org.jboss.classloader.spi.base.BaseClassLoader.loadClass(BaseClassLoader.java:447)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at org.jboss.webservices.integration.util.ASHelper.getEndpointClass(ASHelper.java:295)
at org.jboss.webservices.integration.util.ASHelper.getWebServiceServlets(ASHelper.java:398)
at org.jboss.webservices.integration.util.ASHelper.getJaxwsServlets(ASHelper.java:194)
at org.jboss.webservices.integration.deployers.WSTypeDeployer.isJaxwsJseDeployment(WSTypeDeployer.java:153)
at org.jboss.webservices.integration.deployers.WSTypeDeployer.internalDeploy(WSTypeDeployer.java:68)
at org.jboss.deployers.spi.deployer.helpers.AbstractRealDeployer.deploy(AbstractRealDeployer.java:55)
at org.jboss.deployers.plugins.deployers.DeployerWrapper.deploy(DeployerWrapper.java:179)
... 24 more
Caused by: java.lang.ClassNotFoundException: javax.servlet.http.HttpServlet
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
... 56 more
14:10:17,632 WARN  [HDScanner] Failed to process changes
org.jboss.deployers.client.spi.IncompleteDeploymentException: Summary of incomplete deployments (SEE PREVIOUS ERRORS FOR DETAILS):

*** DEPLOYMENTS IN ERROR: Name -> Error

vfsfile:/Users/groove/Documents/workspace/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_5.1_Runtime_Server1326046666357/deploy/blankWeb.war/ -> org.jboss.deployers.spi.DeploymentException: Error during deploy: vfsfile:/Users/gnarula1/Documents/workspace/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_5.1_Runtime_Server1326046666357/deploy/blankWeb.war/


DEPLOYMENTS IN ERROR:
Deployment "vfsfile:/Users/groove/Documents/workspace/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_5.1_Runtime_Server1326046666357/deploy/blankWeb.war/" is in error due to the following reason(s): java.lang.ClassNotFoundException: javax.servlet.http.HttpServlet

at org.jboss.deployers.plugins.deployers.DeployersImpl.checkComplete(DeployersImpl.java:1008)
at org.jboss.deployers.plugins.deployers.DeployersImpl.checkComplete(DeployersImpl.java:954)
at org.jboss.deployers.plugins.main.MainDeployerImpl.checkComplete(MainDeployerImpl.java:870)
at org.jboss.system.server.profileservice.repository.MainDeployerAdapter.checkComplete(MainDeployerAdapter.java:128)
at org.jboss.system.server.profileservice.hotdeploy.HDScanner.scan(HDScanner.java:416)
at org.jboss.system.server.profileservice.hotdeploy.HDScanner.run(HDScanner.java:294)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:204)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:680)

什么可能导致此错误？

提前致谢。

Answer 1

首先，仅从 JBoss IIRC 版本 6 开始就支持 RestEasy。

如果您确实需要下载，这里有一个“rest easy”网站的链接。
http://www.jboss.org/resteasy

1. 我假设你已经有了一个
   为 JBoss 配置的首选项>服务器>运行时环境>。如果不先这样做。

2. 由以下原因引起：java.lang.NoClassDefFoundError: javax/servlet/http/HttpServlet。这告诉我，如果您得到 1
   右上方您还没有将其添加到您的构建路径中，因为
   属性>Java构建路径>添加库>服务器运行时。运行时包含servletapi。

3. org.jboss.resteasy.plugins.server.servlet.ResteasyBootstrap 位于 resteasy-jaxrs-2.3.0.GA.jar jar 中。把它转储到你的
   WEB_INF/lib 文件夹。不要通过 Eclipse 将其添加到您的构建路径中。
   Eclipse 会自行处理这个问题。

4. org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher。与上面 3 相同。

5. resteasy.scan 我认为此功能是运行时依赖项，存在于
   scannotation-1.0.3.jar。将其转储到 WEB_INF/lib 中。同样，Eclipse 负责处理类路径。

6. 这毕竟是一个 JAX-RS 项目，因此将 jaxrs-api-2.3.0.GA.jar 转储到 WEB_INF/lib 中。这将引入 @Path、@Get 等 注释以在资源类中使用。

7. 我还有jaxb-api-2.2.3.jar、javassist-3.8.0.GA.jar和jackson-jaxrs- 1.8.5.jar 在我的 WEB-INF/lib 中，但从现在开始，这取决于您要使用的功能以及哪些提供程序
   记录器等

---

，如果有人发现丢失的罐子，请更正。我第一次尝试 JAX-RS，我刚刚将 56 个 jar 的全部内容转储到 WEB-INF/lib 中（不是一个好主意）

玩得开心！