I am now developing a java web application. I use some library (.jar) file and create some java under source package (.java). In my .java file, I make some codes for reading an external file and also the jar file that I used will read external file too called from my .java file.
I don’t get any problem when running as java application, but I got an error when creating an object in my servlet. An error messages say that my .java file and the .jar file could not find my needed external files. I add my external files directly in my project folder.
To overcome this, I tried :
1.Add my external files into my lib folder. And I still failed.
2.Using project properties to add on packaging (right click on project then select compile and select packaging). I add all of them there. And I still failed.
All the error that I got after doing the point 2 is :
WARNING: StandardWrapperValve[analyzer]: PWC1382: Allocate exception for servlet analyzerjava.lang.NullPointerException
at alphabeta.Alpha.loadAlpha(Alpha.java:36)
at alphabeta.AlphaBeta.loadCorpus(AlphaBeta.java:111)
at alphabeta.AlphaBeta.<init>(AlphaBeta.java:93)
at alphabeta.Analyzer.init(Analyzer.java:28)
at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1444)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:1071)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:189)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:98)
at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:91)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:162)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:330)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:174)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:828)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:725)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1019)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
at java.lang.Thread.run(Thread.java:722)
And also when I deploy my project, the glassfish log show me this :
WARNING: Illegal character in path at index 14: file:/D:/Grade 4/Noble 2/Finish II/AlphaBeta/AlphaBetaSystem/build/web/WEB-INF/lib/alphagamma.jar java.net.URISyntaxException: Illegal character in path at index 14: file:/D:/Grade 4/Noble 2/Finish II/AlphaBeta/AlphaBetaSystem/build/web/WEB-INF/lib/alpahgamma.jar
at java.net.URI$Parser.fail(URI.java:2829)
at java.net.URI$Parser.checkChars(URI.java:3002)
at java.net.URI$Parser.parseHierarchical(URI.java:3086)
at java.net.URI$Parser.parse(URI.java:3034)
at java.net.URI.<init>(URI.java:595)
at java.net.URL.toURI(URL.java:936)
Here is my code for reading an external file. I implement this on java source code that will be called in servlet when I create its object.
public void loadPaper() throws FileNotFoundException, IOException {
File[] corpus = new File(getDirectory()).listFiles();
System.out.println(corpus.length);
for (int iPaper = 0; iPaper < corpus.length; ++iPaper) {
File paper = corpus[iPaper];
BufferedReader input = new BufferedReader(new FileReader(paper));
StringBuilder contents = new StringBuilder();
String line;
while ((line = input.readLine()) != null) {
contents.append(line).append("\n");
}
String[] rawContent = contents.toString().split("\n\n");
Paper cPaper = new Paper(iPaper, rawContent[0], rawContent[1], rawContent[rawContent.length - 1]);
contents = new StringBuilder();
for (int iContent = 2; iContent < rawContent.length - 1; ++iContent) {
contents.append(rawContent[iContent]).append("\n\n");
}
cPaper.setText(rawContent[0] + "\n\n" + contents.toString());
this.getCorpusCollection().add(cPaper);
input.close();
}
}
The directory is a property for this class. I set it when I want to create its object.
Thank you.
Finally I could figure it. Okay, the trick that I use is: I tried to save my a file from java class where the class that want to read the data. At there, I print the absolute path to find out, where the server save the external path as relative path to my application.
Based on that information, I put all my external file there and well my aplication goes well.
Thank you for the help.