Maven將項目部署到Tomcat-報錯：java.lang.NoClassDefFoundError: javax/servlet/jsp/jstl/core/Config__js

今天使用maven寫SpringMvc，部署到tomcat時，遇到這樣一個問題：

java.lang.NoClassDefFoundError: javax/servlet/jsp/jstl/core/Config
at org.springframework.web.servlet.support.JstlUtils.exposeLocalizationContext(JstlUtils.java:101)
at org.springframework.web.servlet.view.JstlView.exposeHelpers(JstlView.java:135)
at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:142)
at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:303)
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1244)
at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1027)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:971)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
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.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
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:128)
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:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
at java.lang.Thread.run(Thread.java:619)

於是思考了半天，終於找出來了，原來少導了jstl.jar.和standard.jar這兩個jar包

1）在pom.xml檔案裡加入那兩個jar的依賴，就可以了

<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>

<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>

2）在本地倉庫中建立檔案夾，然後把jar包放進去 

發現在本地庫中建立的檔案夾名字和配置依賴的groupid、artifactid和version的關係了麼....哈哈

<dependency>
<groupId>javax.servlet.jl</groupId>
<artifactId>jstl</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>taglibs.jl</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>

3）可以寫死路徑，not really understand yet。

添加成功之後，停止server， clear、package等，然後使用tomcat:run啟動server

這兩個jar包有什麼作用呢。

standard.jar的作用
JSP 標準標籤庫，和jstl.jar 一起使用，在1.0的版本中，但在jstl-1.2.jar 就不在需要了。
如果你想在項目中使用JSTL和EL運算式，那麼你必須要引入這個standard.jar檔案。即使你沒有引入，那MyEclipse工具內建的類庫也會幫你倒入。

參考網址：http://www.cnblogs.com/buglove/p/5159093.html