JSP - Only a type can be imported. Name.pacakge.class resolves to a package but the class is there

Question

I'm receiving this error while trying to deploy a webapp via tomcat 7.

The jsp file name analysis.jsp and this is the error:

Apr 05, 2017 3:05:39 PM org.apache.catalina.core.StandardContext loadOnStartup
SEVERE: Servlet [analyserServlet] in web application [/MWE] threw load() exception
org.apache.jasper.JasperException: Unable to compile class for JSP: 

An error occurred at line: [26] in the generated java file: [/usr/share/tomcat/work/Catalina/localhost/MWE/org/apache/jsp/analysis_jsp.java]
Only a type can be imported. mila.HMM.MorphMult2TaggerFormat resolves to a package

An error occurred at line: [27] in the generated java file: [/usr/share/tomcat/work/Catalina/localhost/MWE/org/apache/jsp/analysis_jsp.java]
Only a type can be imported. mila.HMM.HMM2Morph resolves to a package

An error occurred at line: [28] in the generated java file: [/usr/share/tomcat/work/Catalina/localhost/MWE/org/apache/jsp/analysis_jsp.java]
Only a type can be imported. mila.mw.PostProcessor1 resolves to a package

An error occurred at line: [29] in the generated java file: [/usr/share/tomcat/work/Catalina/localhost/MWE/org/apache/jsp/analysis_jsp.java]
Only a type can be imported. mila.mw.MWXMLTokenizer resolves to a package

An error occurred at line: 36 in the jsp file: /analysis.jsp
mila.mw.MWXMLTokenizer cannot be resolved to a type
33: String tokenizeAndAnalyze(String rawText) throws Exception {
34:     StringWriter sw = new StringWriter();
35:     try (InputStream ins = new ByteArrayInputStream(rawText.getBytes("UTF-8"))) {
36:         new mila.mw.MWXMLTokenizer().tokenizeAndAnalyze(ins, new PrintWriter(sw));
37:     }
38:     StringWriter ppSW = new StringWriter();
39:     try (InputStream ins = new ByteArrayInputStream(sw.toString().getBytes("UTF-8"))) {


An error occurred at line: 40 in the jsp file: /analysis.jsp
mila.mw.PostProcessor1 cannot be resolved to a type
37:     }
38:     StringWriter ppSW = new StringWriter();
39:     try (InputStream ins = new ByteArrayInputStream(sw.toString().getBytes("UTF-8"))) {
40:         new mila.mw.PostProcessor1().process(ins,  new PrintWriter(ppSW));
41:     }
42:     return ppSW.toString();
43: }


An error occurred at line: 46 in the jsp file: /analysis.jsp
mila.HMM.MorphMult2TaggerFormat cannot be resolved to a type
43: }
44: 
45: String runTagger(String xmlAnalyzed, String _tempDirectoryPath) throws Exception {
46:     final String taggerFormat = new mila.HMM.MorphMult2TaggerFormat()
47:                             .myWEBMorp2Tagger(xmlAnalyzed, _tempDirectoryPath);
48:     final String roydir = "/data/tagger/royTagger/";
49:     final String probabilityDir = "/data/tagger/taggerLearningOutputFile/";


An error occurred at line: 60 in the jsp file: /analysis.jsp
mila.HMM.HMM2Morph cannot be resolved to a type
57:     
58:     final String xmlTaggedFilename = _tempDirectoryPath + "/tagged.xml";
59:     PrintWriter pw = new PrintWriter(xmlTaggedFilename);
60:     new mila.HMM.HMM2Morph().process(xmlAnalyzed, taggedFilename, pw);
61:     return xmlTaggedFilename;    
62: }
63: 


Stacktrace:
    at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:103)
    at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:366)
    at org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:494)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:379)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:354)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:341)
    at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:662)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:364)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
    at org.apache.jasper.servlet.JspServlet.init(JspServlet.java:138)
    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1282)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1195)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1085)
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5318)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5610)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:899)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:875)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652)
    at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1260)
    at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:2002)
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

Here is the import part from the jsp:

<%@ page language = "java"
    import = "java.lang.StringBuilder"
    import = "java.io.StringWriter"
    import = "java.io.PrintWriter"
    import = "java.io.ByteArrayInputStream"
    import = "java.io.IOException"
    import = "java.io.File"
    import = "java.io.BufferedReader"
    import = "java.io.InputStreamReader"
    import = "java.io.InputStream"
    import = "java.nio.file.Files"
    import = "java.nio.file.Paths"
    import = "java.nio.file.StandardCopyOption"
    import = "mila.HMM.MorphMult2TaggerFormat"
    import = "mila.HMM.HMM2Morph"
    import = "mila.mw.PostProcessor1"
    import = "mila.mw.MWXMLTokenizer"
%>

Under the WEB-INF/lib folder I have a JAR named morphAnalyzer.jar which is basically the project and it contains all the classes needed including the ones that cause this error. Here is a partial vim look into the JAR

mila/
mila/HMM/
mila/HMM/HMM2Morph.class
mila/HMM/MorphMult2TaggerFormat.class
...
mila/mw/MWXMLMorphAnalyzer.class
mila/mw/MWXMLTokenizer.class
mila/mw/PostProcessor1.class
...

As you can see the jar does include all the classes I need but for some reason the jsp file doesn't recognize them as classes.

P.S there is no other package with classes named the same (i.e all classes names are unique throughout the whole project)

What am I doing wrong? Please help.

Answer 1

Include morphAnalyzer.jar in class path of you application

Answer 2

classes are to be comma separated in the import attribute.

Like the below:

import ="mila.HMM.MorphMult2TaggerFormat, mila.HMM.HMM2Morph, mila.mw.PostProcessor1 ,mila.mw.MWXMLTokenizer"