相关疑难解决方法(0)

我使用下面的代码将文件上传到tomcat5.5,它给了我以下异常

java.lang.NoClassDefFoundError: org/apache/commons/io/output/DeferredFileOutputStream

你能帮我找一下吗？

import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

/**
 * Servlet implementation class FileUploadServlet
 */
public class FileUploadServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#HttpServlet()
     */
    public FileUploadServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    @SuppressWarnings("rawtypes")
    protected void doGet(HttpServletRequest request, HttpServletResponse response) …

我是一个初学者,学习春天和休眠(在项目中使用maven)并遇到了这个问题并被困在这里.试图寻找解决方案,但最终没有在哪里.请帮忙.非常感谢

错误:"找不到" http://java.sun.com/jsp/jstl/core " 的标记库描述符

码:

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://www.springframework.org/tags" prefix="spring" %>
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form" %>

尝试在Java构建路径中找不到超类"javax.servlet.http.HttpServlet"中 给出的解决方案如何在Eclipse项目中导入javax.servlet API？

错误仍然存​​在

的pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-    instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.journaldev.spring</groupId>
<artifactId>SpringMVCHibernate</artifactId>
<name>SpringMVCHibernate</name>
<packaging>war</packaging>
<version>1.0.0-BUILD-SNAPSHOT</version>
<properties>
    <java-version>1.6</java-version>
    <org.springframework-version>4.0.3.RELEASE</org.springframework-version>
    <org.aspectj-version>1.7.4</org.aspectj-version>
    <org.slf4j-version>1.7.5</org.slf4j-version>
    <hibernate.version>4.3.5.Final</hibernate.version>
</properties>
<dependencies>
    <!-- Spring -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>${org.springframework-version}</version>
        <exclusions>
            <!-- Exclude Commons Logging in favor of SLF4j -->
            <exclusion>
                <groupId>commons-logging</groupId>
                <artifactId>commons-logging</artifactId>
             </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>${org.springframework-version}</version>
    </dependency>
    <dependency> …

我安装了jre7和jdk1.7.0以及Tomcat 7.0,但它显示了这个错误.servlet.http不是唯一一个"不存在"的,还有其他(servlet.)组件.

任何人都可以帮我吗？

更新:当我尝试以下命令时发生此错误:javac -classpath servlet-api.jar WebTest.java

我的编译器无法找到HttpServletRequest getServletContext()方法.

我没有做太复杂的事情:

public static void setMySortedSet(HttpServletRequest request, SortedSet<String> set) 
{
   setMySortedSet(request.getServletContext(), set);
}

我尝试了一些故障排除:

• 发现该方法是在2.3中创建的,所以我包含了一个反映该方法的JAR(并将其放在我的Eclipse构建路径中)
• 我在我的build.xml类路径中包含了JAR .

当我使用Eclipse时,找到了该方法,但是当我尝试构建类时,我看到了这个:

compile:
[javac] Compiling 1 source files to C:\...\workspace\proj\build\WEB-INF\classes
[javac] C:\...\workspace\proj\src\main\Helper.java:26: cannot find symbol
[javac] symbol  : method getServletContext()
[javac] location: interface javax.servlet.http.HttpServletRequest
[javac]     return getURISet(request.getServletContext());
[javac]                       ^
[javac] Note: C:\...\workspace\proj\src\main\Helper.java uses unchecked or unsafe operations.
[javac] Note: Recompile with -Xlint:unchecked for details.
[javac] 1 error

我可能缺少什么想法？我感谢任何回应.

我正在开发一个servlet,它接收包含多个文件内容的多部分请求,我正在使用apache commons文件上传库.

当我调用parseRequest(request);方法servlet抛出异常时:

GRAVE: Servlet.service() for servlet DiffOntology threw exception
java.lang.NoClassDefFoundError: javax/servlet/http/HttpServletRequest
    at org.apache.commons.fileupload.servlet.ServletRequestContext.getContentType(ServletRequestContext.java:73)
    at org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.<init>(FileUploadBase.java:882)
    at org.apache.commons.fileupload.FileUploadBase.getItemIterator(FileUploadBase.java:331)
    at org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:349)
    at org.apache.commons.fileupload.servlet.ServletFileUpload.parseRequest(ServletFileUpload.java:126)
    at DiffOntology.doPost(DiffOntology.java:38)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:738)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
    at java.lang.Thread.run(Thread.java:619)

我把所有库放在WEB-INF/lib中.

编辑:

servlet-api.jar在正确的目录(tomcat/lib)中,所有其他库都在WEB-INF/lib中

我想也许问题可能如下:我在Eclipse中开发这个Web项目,我在类路径中导入了文件上传库.

怎么不行？

我很绝望!!

我已经安装了Java SDK,之后我还下载了Java EE,它没有自动安装在Eclipse中.如何在Eclipse中导入Java EE库？

我有一个用java实现的Web服务项目,它还包含jsp页面.我在我的机器上将它部署在jetty 8.1.5上并且它正常工作.但是,当我使用jetty 8.1.3部署在Windows Server 2003上时,它会出现以下异常:

org.apache.jasper.el.ELContextImpl cannot be cast to org.apache.jasper.runtime.ELContextImpl

这是完整的痕迹:

java.lang.ClassCastException: org.apache.jasper.el.ELContextImpl cannot be cast to org.apache.jasper.runtime.ELContextImpl
    at org.apache.jasper.runtime.PageContextImpl.evaluateExpression(PageContextImpl.java:1002)
    at org.apache.jsp.home.index_jsp._jspService(org.apache.jsp.home.index_jsp:52)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:403)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:492)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:378)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:598)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:486)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:542)
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:233)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1065)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:413)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:192)
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:999)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
    at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:271)
    at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:98)
    at org.eclipse.jetty.servlet.DefaultServlet.doGet(DefaultServlet.java:557)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:735)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:598)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:486)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:499)
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:233)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1065)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:413)
    at …

我使用eclipse在本地机器上编写了几个servlet.我在我的本地机器上测试过它们,一切都很好.

然后我将我的项目导出为.war文件并将其放在我的tomcat的webapps目录下的另一台机器上,我只有ssh访问权限.我重新启动了我的tomcat服务器,在查看日志文件之后,我发现它引发了以下异常:

java.lang.NoSuchMethodException: org.apache.catalina.deploy.WebXml addServlet
at org.apache.tomcat.util.IntrospectionUtils.callMethod1(IntrospectionUtils.java:855)
at org.apache.tomcat.util.digester.SetNextRule.end(SetNextRule.java:201)
at org.apache.tomcat.util.digester.Digester.endElement(Digester.java:1051)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:604)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1759)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2915)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:625)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:488)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:819)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:748)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:123)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1208)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:525)
at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1537)
at org.apache.catalina.startup.ContextConfig.parseWebXml(ContextConfig.java:1875)
at org.apache.catalina.startup.ContextConfig.getDefaultWebXmlFragment(ContextConfig.java:1472)
at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1250)
at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:878)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:369)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5173)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:968)
at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1646)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:679)

不知道这意味着什么？

我在eclipse中创建一个servlet时出错了

此行有多个标记

• ServletException无法解析为类型
• HttpServletResponse无法解析为某种类型
• HttpServletRequest无法解析为某个类型

我有一个项目需要一些Tomcat库才能正常运行.我安装了Tomcat(在Mac上),这实际上只是一个put-the-folder-somewhere进程.我最初通过添加所需的jar文件作为项目的外部jar解决了这个问题 - 但是这与.classpath我不能允许的项目混淆- 这些更改将在我们的源代码控制中被跟踪.

我已经尝试将tomcat/lib目录添加到eclipse作为类路径变量,但这不能解决问题.

当tomcat服务器启动时,我会收到ClassNotFoundException: HttpServletRequest.

我怎么能添加tomcat lib目录,以便我不修改项目类路径？