面对java.lang.NoSuchMethodError：码头+ Eclipse

Question

Hi I am using embedded Jetty 8.x In Eclipse and getting this error, while making simple Hello web application with JSP and Servlet. Am I missing some jar in Build Path ?

org.apache.jasper.JasperException: Unable to compile class for JSP

An error occurred at line: -1 in the jsp file: null

Generated servlet error:
Detected Java version: 1.6 in: C:\Program Files\Java\jdk1.6.0_20\jre
Detected OS: Windows XP
parsing buildfile jar:file:/C:/Documents%20and%20Settings/ashish.s/NewEclipseJuno/JServer/WebContent/WEB-INF/lib/ant-1.8.3.jar!/org/apache/tools/ant/antlib.xml with URI = jar:file:/C:/Documents%20and%20Settings/ashish.s/NewEclipseJuno/JServer/WebContent/WEB-INF/lib/ant-1.8.3.jar!/org/apache/tools/ant/antlib.xml from a zip file
parsing buildfile jar:file:/C:/Documents%20and%20Settings/ashish.s/My%20Documents/Downloads/ant-1.8.3.jar!/org/apache/tools/ant/antlib.xml with URI = jar:file:/C:/Documents%20and%20Settings/ashish.s/My%20Documents/Downloads/ant-1.8.3.jar!/org/apache/tools/ant/antlib.xml from a zip file
Project base dir set to: C:\Documents and Settings\ashish.s\NewEclipseJuno\JServer
    [javac] warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds

Answer 1

I'm going to go ahead and put some more detail in an answer as I also faced the same issue (or close enough) where the application worked fine when run form eclipse and threw

java.lang.NoSuchMethodError: org.apache.jasper.compiler.JspUtil.expandClassPath(Ljava/util/List;)Ljava/util/List;

when exported and running form a runable jar.

The soloution (as mentioned in the comments above) was to add jasper-compiler-*.jar and jasper-runtime-*.jar to the class path in eclipse before exporting (Where the asterixis are version numbers). these I found respectively at: jasper-compiler.jar and jasper-runtime.jar

If these links are dead at the time of reading then a Google search (or using a service like jar finder ) should help you locate the required jars mentioned above.