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JSP can't run on the tomcat server

843838Dec 18 2005 — edited Mar 13 2007

my tomcat version is 5.x,
previously I can run JSP on tomcat without any mistake ,but today ,when I write a JSP ,a mistake occur,no matter how simple the code of JSP is .
below is the error message:
HTTP Status 500 -

--------------------------------------------------------------------------------

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: org.apache.jasper.tagplugins.jstl.If
org.apache.jasper.compiler.TagPluginManager.init(TagPluginManager.java:109)
org.apache.jasper.compiler.TagPluginManager.apply(TagPluginManager.java:51)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:180)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:286)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:267)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:255)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:563)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:293)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:123)

root cause

java.lang.ClassNotFoundException: org.apache.jasper.tagplugins.jstl.If
java.net.URLClassLoader$1.run(Unknown Source)
java.security.AccessController.doPrivileged(Native Method)
java.net.URLClassLoader.findClass(Unknown Source)
java.lang.ClassLoader.loadClass(Unknown Source)
java.lang.ClassLoader.loadClass(Unknown Source)
java.lang.ClassLoader.loadClassInternal(Unknown Source)
java.lang.Class.forName0(Native Method)
java.lang.Class.forName(Unknown Source)
org.apache.jasper.compiler.TagPluginManager.init(TagPluginManager.java:106)
org.apache.jasper.compiler.TagPluginManager.apply(TagPluginManager.java:51)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:180)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:286)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:267)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:255)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:563)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:293)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:123)

note The full stack trace of the root cause is available in the Apache Tomcat/5.5.11 logs.

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Locked on Apr 10 2007

Added on Dec 18 2005

#javaserver-pages-jsp-and-jstl

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