Problem: jar getting loaded twice in eclipse
Description:
I copied and pasted struts jar into lib folder of WEB-INF.
The jars icon get changed .
If I remove the jars in build path they get back to normal state but program says package not found.
My program is correct but i am getting
Resource not found ie HTTP-404
error due to this.
So please tell me how to load jars?
You can do two things
go to the build path and create user define library for you jar file and
when you deleting it from build path that mean it is not configured for you application but some times it shows like it is configured. For that you again go to lib and add the jar to build path
Related
2 errors : like this (follow the pict)
enter image description here
in a detail.. it's said
1.
Description Resource Path Location Type
Archive for required library: 'C:/Users/Administrator/.m2/repository/org/hibernate/hibernate-core/4.2.1.Final/hibernate-core-4.2.1.Final.jar' in project 'spring' cannot be read or is not a valid ZIP file spring Build path Build Path Problem
2.
Description Resource Path Location Type
The project cannot be built until build path errors are resolved spring Unknown Java Problem
i think it's cuz of a wrong path or no jar file
yeah but so what?
could you advice me some steps to solve it? plz...
Check the jar file written in the error message:
C:/Users/Administrator/.m2/repository/org/hibernate/hibernate-core/4.2.1.Final/hibernate-core-4.2.1.Final.jar
Is it there? Can you open it manually as a zip?
Occasionally it happens that the jar file is not correctly downloaded from the artifactory (when it happens it usually has 0kb size).
Delete the jar file, and let Maven redownload it again, it usually does the trick.
If it does not solve it, there may be a permission problem (does Eclipse has right to write under that path?), or an artifactory problem (are you using the central repository?) or even antivirus could block the download.
I have a jsp file called AddBidding.jsp which adds bids for a facility. I am using the Google App Engine's datastore (objectify). When I try to run the file using localhost:8888/AddBidding.jsp. However, it keeps giving me NoClassDefinitionFound Error. Can I know what causes this error? I know it's due to the classpath but how do I fix it in Eclipse GAE?
I am making some assumptions over here since there are not too many details about which class is giving you the NoClassDefFound Error. Just ensure that all the external(additional) JARs that you use are present in the WEB-INF\lib folder also. For e.g. put all the Objectify and dependent JARs in the WEB-INF\lib folder and then try.
Right Click the Project on Project Explorer View > "Configure Build Path"
In Source [tab] Make sure your Default output folder is right
In Libraries [tab] you have Web App Libraries
If not Add Library...
That should get you working.
Eclipse is only giving me option to include jar files in Java Build Path->Libraries .In some tutorial sites they are showing to add jar files in WEb-INF/lib,but iam not able to add jar here.i tried importing files to WEB-INF/lib,jars were added but they did not had jar icon instead some weird icon ,and when i m trying to run my struts login page its giving me error
/index.jsp(8,40) File "/struts-tags" not found.Where to put jar to make it work,Also while learning struts sometime i get Http 404 error,but when i restart eclipse(I tried restarting server but it didnt help) the error is gone all of a sudden.why this is happening.Eclipse is so confusing.
Go to the your web-project folder outside the eclipse.Cope your jars (which are required for your project).
Than open-up Eclipse, follow these steps
Right Click on project(Project Explorer) choose -->Configure build path.
Go to Library tab and click on add jars, it will open this wizard
Add required jars and i hope this will solve your problem.
Make sure you have required jars in your class-path..
As jars are showing some weird icon, I would suggest you to change the jar files. Also, make sure your added jar contains struts-tags.tld file. This will resolve error on index.jsp.
sorry, system is not allowing me to put comment. So editing the same.
Follow below steps to check the jars are added to build path correctly -
switch to package explorer view.
check whether your jars are added under web app Libraries. If yes your jars are added properly.
Then check struts-tags.tld file is present inside struts2-core.jar. If not present then copy it or add new jar containing the same.
I've this problem using STS: I'm building a simple Spring app, just to try out features like MVC and persistence. Now I've created something very simple, out of a bunch of tutorials for Spring 3, that I'm using. The application fails with this, during server startup:
Code:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping#0': Initialization of bean failed; nested exception is org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean] for bean with name 'mySessionFactory' defined in ServletContext resource [/WEB-INF/spring/appServlet/servlet-context.xml]; nested exception is java.lang.ClassNotFoundException: org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean
but I've org.springframework.orm in web-inf/classes folder (I even tried putting it in web-inf/lib). As I copied these libs there, the came out in Web App Libraries folder. Building this project in STS works fine as this dependency is set up in build path throught project properties, but how do I transfer the libs to the web app? (I'm using Tomcat 6 as it is the server I'm going to use sometime in the future for production). Is this a config problem of my XML? Or am I just missing the right way to put this lib? (I encountered the same problem before, but adding the needed lib in classes worked it out). More than this I that if I browse inside my workspace to the folder where the working folder of tomcat should be, I can't find any work directory and any commo
Go to the Servers view and double click on Tomcat Server which will open up a Tomcat Overview page. This will show you the server path and deploy path which Eclipse is using to publish your webapps to.
For example, mine are:
Server path: .metadata\.plugins\org.eclipse.wst.server.core\tmp0
Deploy path: wtpwebapps
Now in a Command Prompt (or Explorer) browse to %ECLIPSE_HOME%\workspaces\default\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps and you should see your webapp. Go into the WEB-INF\lib directory and check if your jar is there.
A few things to try:
If the jar is not in WEB-INF\lib, you might need to republish it. Right-click on the Tomcat in the Servers view and click Publish. Does it appear? If not, Right-click on the Tomcat again and this time select Clean... which will clean out everything and republish. If this doesn't work, the brute force approach would be to delete the files manually and then tell Eclipse to republish them.
Clean your work directory, by right-clicking the webapp under Tomcat in the Servers view and selecting Clean module work directory. Or do it manually by deleting from %ECLIPSE_HOME%\workspaces\default\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\work\Catalina\localhost
You should also try closing-reopening/cleaning/rebuilding/refreshing your webapp project just in case Eclipse hasn't picked up the changes.
You need to put the various Spring JARs into your WEB-INF/lib directory (WEB-INF/classes is no use for JAR files).
You don't just need org.springframework.orm, you need most of them (see here for dependency diagram).
At least the libary jar files must be located at WEB-INF/lib within your war file. And you only need to deploy the war file to your productiv web server.
If you use STS but your Project is not a Maven project: then you need to put the files in <projectRoot>/WebContent/WEB-INF/libs .(to build the war with Eclipse/STS you need to execute Export/Web/WAR file.)
If you use Maven, then you need the specify your dependencies in the pom.xml, and use maven to package the war (run as/Maven package).
I have a small GUI application developed with netbeans.
I used the 'clean and build' option to build an executable jar file. .jar file works in my pc. But when i sent the application to my friend he says that it throws 'cannot find the main class' error.
what could be the reason?
Thanks in advance...
Open project property, select run and set Main-Class (textfield) attribute.
EDIT:
Execute the main class in .jar application,
java -jar Application.jar
If you have used any library, try giving the library jar files along with the jar file. For example if your libraries are present in suppose lib folder then give the complete lib folder along with the jar file.