java.lang.ClassNotFoundException: javax.servlet.jsp.tagext.Tag

я получил две ошибки, одна:java.lang.ClassNotFoundException: javax.servlet.jsp.tagext.Tag

Nov 20, 2013 3:42:34 PM org.apache.catalina.core.ApplicationDispatcher invoke 
SEVERE: Servlet.service() for servlet jsp threw exception 
java.lang.ClassNotFoundException: javax.servlet.jsp.tagext.Tag 
    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 java.lang.ClassLoader.loadClass(Unknown Source) 
    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$1.run(Unknown Source) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at java.net.URLClassLoader.findClass(Unknown Source) 
    at java.lang.ClassLoader.loadClass(Unknown Source) 
    at java.lang.ClassLoader.loadClass(Unknown Source) 
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) 
    at java.lang.ClassLoader.loadClass(Unknown Source) 
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1617) 
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1547) 
    at java.lang.ClassLoader.defineClass1(Native Method) 
    at java.lang.ClassLoader.defineClass(Unknown Source) 
    at java.security.SecureClassLoader.defineClass(Unknown Source) 
    at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2918) 
    at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1174) 
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1669) 
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1547) 
    at org.apache.jasper.compiler.Parser.parseCustomTag(Parser.java:1223) 
    at org.apache.jasper.compiler.Parser.parseElements(Parser.java:1452) 
    at org.apache.jasper.compiler.Parser.parse(Parser.java:138) 
    at org.apache.jasper.compiler.ParserController.doParse(ParserController.java:242) 
    at org.apache.jasper.compiler.ParserController.parse(ParserController.java:102) 
    at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:198) 
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:373) 
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:353) 
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:340) 
    at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:646) 
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357) 
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390) 
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) 
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) 
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749) 
    at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:487) 
    at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:412) 
    at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339) 
    at com.oq.login.Login.doPost(Login.java:45) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:647) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) 
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100) 
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) 
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041) 
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603) 
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
    at java.lang.Thread.run(Unknown Source)

следующая ошибка также одинакова, но заголовок:

Nov 20, 2013 3:42:34 PM org.apache.catalina.core.StandardWrapperValve invoke 
SEVERE: Servlet.service() for servlet [LoginServlet] in context with path [/project3] threw exception [java.lang.NoClassDefFoundError: javax/servlet/jsp/tagext/Tag] with root cause

Мой pom.xml является:

<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/xsd/maven-4.0.0.xsd"> 
    <modelVersion>4.0.0</modelVersion> 
    <groupId>project2</groupId> 
    <artifactId>project2</artifactId> 
    <version>1.0-SNAPSHOT</version> 
    <packaging>war</packaging> 
    <build> 
    <plugins> 
     <plugin> 
     <artifactId>maven-compiler-plugin</artifactId> 
     <version>3.1</version> 
     <configuration> 
      <source>1.7</source> 
      <target>1.7</target> 
     </configuration> 
     </plugin> 
     <plugin> 
     <artifactId>maven-war-plugin</artifactId> 
     <version>2.3</version> 
     <configuration> 
      <warSourceDirectory>WebContent</warSourceDirectory> 
      <failOnMissingWebXml>false</failOnMissingWebXml> 
     </configuration> 
     </plugin> 
    </plugins> 
    </build> 
    <dependencies> 
    <dependency> 
     <groupId>javax.servlet</groupId> 
     <artifactId>jstl</artifactId> 
     <version>1.2</version> 
     <scope>runtime</scope> 
    </dependency> 

    <dependency> 
     <groupId>mysql</groupId> 
     <artifactId>mysql-connector-java</artifactId> 
     <version>5.1.27</version> 
    </dependency> 
    </dependencies> 
</project>

Мой web.xml является:

?xml version="1.0" encoding="UTF-8"?> 
<web-app version="3.0" 
    xmlns="http://java.sun.com/xml/ns/javaee" 
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
      xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
       http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"> 

    <display-name>Archetype Created Web Application</display-name> 
    <servlet> 
    <servlet-name>LoginServlet</servlet-name> 
    <servlet-class>com.oq.login.Login</servlet-class> 
    </servlet> 
    <servlet-mapping> 
    <servlet-name>LoginServlet</servlet-name> 
    <url-pattern>/</url-pattern> 
    </servlet-mapping> 
    <servlet> 
    <servlet-name>SubjectSelectorServlet</servlet-name> 
    <servlet-class>com.oq.subject.SubjectSelector</servlet-class> 
    </servlet> 
    <servlet-mapping> 
    <servlet-name>SubjectSelectorServlet</servlet-name> 
    <url-pattern>/SubjectSelector</url-pattern> 
    </servlet-mapping> 

    <welcome-file-list> 
    <welcome-file>index.jsp</welcome-file> 
    <welcome-file>default.html</welcome-file> 
    <welcome-file>default.htm</welcome-file> 
    <welcome-file>default.jsp</welcome-file> 
    </welcome-file-list> 
</web-app>

В моей сборке пути у меня есть:
Apache Tomcat v7.0 Библиотека
JRE System Library [JavaSE-1,7]
Maven зависимости

Я прошел через:
java.lang.NoClassDefFoundError: javax/servlet/jsp/tagext/TagLibraryValidator
и другие ресурсы но не нашел правильного решения.

источник

2013-11-20 Asim

Вы должны добавить javax.servlet.jsp.jar, вы можете скачать его из [здесь] (http://www.java2s.com/Code/Jar/j/Downloadjavaxservletjspjar.htm) – Jhanvi

У меня уже есть это в Библиотека Apache Tomcat 7.0 в файле jsp-api.jar. – Asim

Наконец, избавившись от этой проблемы. Я включил «workspace jre» в Windows-> Preferences-> Installed JRE, которые я заменил на jdk, установленном в C: \ Program Files \ Java \ jdk1.6.0_27. Моя упаковка проект в war.This также может решить проблему:

org.apache.jasper.JasperException: The absolute uri: http://java.sun.com/jsp/jstl/core cannot be resolved in either web.xml or the jar files deployed with this application at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:56)

, который является копией ошибки, о которой говорилось в этом вопросе, и происходит, когда упаковка находится в банке.

источник

2013-11-25 15:22:30 Asim

попытаться вставить это в ПОМ:

<dependency> 
    <groupId>javax.servlet.jsp</groupId> 
    <artifactId>jsp-api</artifactId> 
    <version>2.1</version> 
</dependency>

источник

2013-11-20 14:18:21 reve

java.lang.ClassNotFoundException: javax.servlet.jsp.tagext.Tag

ответ

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