I created simple maven web application project. After creation there were no 'src/main/java' and 'src/test/java' folders but only 'src/main/resources'.
I added this two folders and updated maven project.
Than I added some package to 'src/main/java' and try to add servlet by right click at package element
At next step I see window with some servlet details
But when I start to add servlet name eclipse shows me message that "Not a java source folder".
By the same way I can add simple class to this pachage without any problem but in case of servlet I cannot. Do I miss something during configuration?
I could not find the cause of the problem, but I solved it restarting Eclipse (I have Eclipse Neon.2 Release (4.6.2)).
Related
I have a Spring 4 MVC Maven project in Eclipse Mars
I have this error javax.servlet.jsp.JspException cannot be resolved to a type in the JSP, even in my Project Facets -> Runtimes I have checked Apache Tomcat v7.0065
The error is in Edit time and I can find that type on the project's Java Build Path as M2_REPO/../javax.servlet-api-3.0.1.jar
You may be looking at the wrong JAR file for JspException.
I am developing a Spring 4 app in Eclipse with a Maven project, but using an external Tomcat 8 server. I was receiving the same error message in a JSP in the editor until I created and added a User Library in Eclipse that contained 'jsp-api.jar', which is actually a link in my Ubuntu file system to a file named 'tomcat8-jsp-api.jar'.
Once I added this new user library to my build path and then did a 'Build Project' in Eclipse, the red markers went away. You may need to refresh the project after building. Hopefully this at least points you in the right direction.
I think you missed to add jsp-api.jar in your Spring 4 Project
I have created a Dynamic web project, but I am not able to deploy it into
Apache Tomcat Server 6.0. I am getting this error when I try to deploy my project:
There are No resources that can be added or removed from the server.
For this you need to update your Project Facets setting.
Project (right click) -> Properties -> Project Facets from left
navigation.
If it is not open...click on the link, Check the Dynamic Web Module Check Box and select the respective version (Probably 2.4). Click on Apply Button and then Click on OK.
Check whether your Java version is compatible with the project. Right click the project>>Properties>>Project Facets>>Java check the version is compatible with your project.
The issue is incompatible web application version with the targeted server. So project facets needs to be changed. In most of the cases the "Dynamic Web Module" property. This should be the value of the servlet-api version supported by the server.
In my case,
I tried changing the web_app value in web.xml. It did not worked.
I tried changing the project facet by right clicking on project properties(as mentioned above), did not work.
What worked is:
Changing "version" value as in jst.web to right version from
org.eclipse.wst.common.project.facet.core.xml file. This file is present in the .setting folder under your project root directory.
You may also look at this
if your project maven based, you can also try updating your project maven config by selecting project. Right click project> Maven>Update Project option. it will update your project config.
I used mvn eclipse:eclipse -Dwtpversion=2.0 in command line in the folder where I had my pom.xml. Then I refreshed the project in eclipse IDE. After that I was able to add my project.
I didn't find the Dynamic Web Module option when I clicked on the link, then I have installed Maven(Java EE) Integration for Eclipse WTP from the Eclipse Marketplace.Then, the above steps worked.
I encountered this error even though the Project Facets were set appropriately. The problem was that the "Runtime Environment" property was not set on the server:
It simply needed to be set to the appropriate Runtime:
The only thing that worked for me was creating a
.java-version
file with "oracle64-1.8.0.112" as the only entry ( use something that is 1.6+ )
Make sure you have dynamic web module facet turned on.
Right click on the project, select properties and then select "Targeted Runtimes". Check if Tomcat is selected here.
The issue is it is missing Dynamic Web Module facet definition.
Run the following at command line
mvn eclipse:eclipse -Dwtpversion=2.0
After build is success, refresh the project and you will be add the web project to server.
First check Project Facets setting as most replies had been answered.
Then check the Runtime Server is also aligned with the appropriate JRE.
In my case, I updated project JRE System Library and JDK compiler to 1.8,
but original Tomcat server is setting up on JRE 1.7,after upgraded to 1.8,the issue is resolved.
when I use an external tomcat everything is just fine. but I need to deploy my project on internal eclipse tomcat server in order to be able to use DCEVM class hot swapping.
When I try to start tomcat server from within eclipse it says it is not able to find one of my service classes I mentioned in my spring security configuration file as a bean.
I also tried to add the project to tomcat class path but it did not solve my problem.
UPDATE
I found out the problem is because when I deploy my web project to eclipse tomcat server, no .class is copied to:
C:\Users\Meysam\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\villapweb\WEB-INF\classes
in fact, this folder contains my src/java/main package structure but no .class is copied in it.
lib folder is fine though (e.g. all dependencies of maven and other stuff copies in the path it is supposed to)
I think there might be something wrong with m2e-wtp plugin. I dont know what!
I am using eclipse 4.3 BTW.
SOLVED
I Solved this issue following these steps:
right click on project in eclipse > properties > project facets
in the right panel select runtimes and select your target server. Apply and ok.
in the server modules list right click on project module and click clean module work directory
right click on the server itself and you can clean both server and tomcat work directory one after another
if that didn't work, try project > clean and also toggle "build automatically" option under project menu item.
Thats it. tomcat now copies all .class files to the target server and you see no ClassNotFound exception as tomcat starts up.
[Copied to answer section]
I Solved this issue following these steps:
right click on project in eclipse > properties > project facets
in the right panel select runtimes and select your target server. Apply
and ok.
in the server modules list
right click on project module and
click clean module work directory right click on the server itself
and you can clean both server and tomcat work directory one after
another
if that didn't work, try project > clean and also toggle
"build automatically" option under project
Thats it. tomcat now copies all .class files to the target server and you see no ClassNotFound exception as tomcat starts up.
I've followed the steps on the answer but It still wouldn't work for me, so, besides doing these steps once, I've found that doing a refresh on the target after doing a clean install automatically triggers the "Republish" status on the server, so when the server is executed all changes on the compiled classes (new classes and changes to existing ones) are then copied to wtpwebapps when the server is started.
I had almost the same problem - one of my projects did not make it to the deployment area (its jar). What i did is 1) remove the appliction from tomcat 2) clean tomcat work directory 3) most important: project - clean - all. Then i added the application again and... problem solved
I had the same problem in Web Dynamic project converted to Maven project.
I found error in properties->Deployment Assembly->right panel.
There was source=src folder and deploy path=WEB-INF/classes. Classes couldn't be found by Eclipse.
Changed to source=target/classes.
I've recently upgraded from Eclipse Juno to Kepler, and have imported some old projects into a new workspace, but unfortunately I cannot get publishing of one of my web projects to work. It has dependencies on a couple of other projects in the same workspace, and these projects are listed in the 'deployment assembly' tab with entries like
Source Deploy Path
/eventserver WEB-INF/lib
that I have added using the 'Add/Project' option (I'm pretty sure I've previously used 'Add/Entries from Classpath' but that option does not list the projects, so I don't know what's going on). But neither the projects' code nor their dependencies are being deployed to WEB-INF/lib when I publish the main project. Also, I have the following warning showing up:
Description Resource Path Location Type
Projects must be referenced by an EAR or a WAR to use classpath publish/export dependencies whose runtime path (../) maps into the parent component. eventserver P/eventserver Classpath Dependency Validator Message
which I only used to get if I didn't have a main project that referred to the utility project.
Any ideas what's going on?
Create an EAR project using this link:
http://www.eclipse.org/webtools/jst/components/j2ee/scenarios/application_creation_tutorial.html
After creation, try to Add the Project in server entry.
I am trying to make a simple servlet in Eclipse. But including the following libraries generates errors as if they were not defined in Eclipse.
import javax.servlet.*;
import javax.servlet.http.*;
How to have them recognised and defined?
Please add servlet-api.jar in classpath of your project.if you are using tomcat server, then it should be present in ${CATALINA_HOME}/lib
Be sure you are doing the right way:
If you are using the Classic version of Eclipse, then you must donwload the Web Tools Platform.
If you have an Eclipse Java EE Edition, then there is already installed the necessary plugins.
Create a new Dynamic Web Project: Menu New > Project > Dynamic Web Project.
Fill all values you want for the new project.
Do right click on the project and select New Servlet.
Last step creates a new Class file that is a servlet class, already importing the necessary packages, such as javax.servlet.http.*.
If you are using a Eclipse with a Maven plugin installed then, after configured it, you can only add the following dependencies:
http://mvnrepository.com/artifact/javax.servlet/servlet-api/2.5
http://mvnrepository.com/artifact/javax.servlet/jstl/1.2
http://mvnrepository.com/artifact/javax.servlet/jsp-api/2.0
In fact, you can see this tutorial explaining very well all the steps to create a Dynamic Web Prroject using WTP.
Or by ugin Maven, this one and this full explained.
Hope this help...