Deploying Eclipse dynamic web app after changing java source - java

I have a eclipse dynamic web project with backend written in java. I have configured Eclipse to deploy and run this project using tomcat.
When I change my java source code, build project and run the server in tomcat, sometimes my changes get applied, but sometimes they do not get applied.
When changing java source code, what are the steps I need to follow when running the project, so that changes will be applied?
I am using eclipse jee neon.

When you changes to the code, follow following steps to test the changes.
Go to the servers tab in your IDE and remove the existing web module
related to your application.
Now right click on the project and build project. Then right click on
index.jsp file and select Run as → Run on Server

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How to migrate Java project from Eclipse to VS Code?

I'm trying to migrate a Java project from Eclipse to VS Code, the project consist of a front and a backend, and both are supposed to run on a Wildfly Server at localhost. I want to have hot code reload when a .xhtml or .java file is modified, without having to manually compile a .war file and publish it to the server.
I'm using the Red Hat Server Connector plugin, but on the Wildfly server there is only and option for deploying a war file or a folder.
Is there a way to configure Maven to compile directly to wildfly\standalone\deployments? or some tutorial about how can I configure VS Code for Java.
Have you tried the Tomcat for Java extension?
You can have a look at this video, at the 8:13 you can see the Hot Code Replace button.

Why does opening python script in eclipse assigns python nature to my project

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Inside the parent project are websphere administration python scripts. When I open these scripts to view or edit them eclipse automatically assigns the org.python.pydev.pythonNature to the project and I get a red X indicating python is not configured.
I have to continuously open and deselect the project nature and reopen the project. Is there a way to make it stop doing this?
Well, as you saw, the pythonNature is automatically added to the project whenever a python file is opened... this is working as designed.
I didn't understand why you're fighting that... I.e.: why didn't you just configure the interpreter and let the pythonNature there?

Run spring project in eclipse

I am new in spring.I imported one spring project in eclipse and try to run with apache tomcat but it is not running.There is no main method in project.It contains only controllers and models and one jsp page.When i tried to run as a java application is shows below dialog. Please help me.I tried all in google for how to run spring project but i can't understand.Please tell me how to do?
Assuming you have added tomcat to your eclipse.
If your project is pure java project then it will not show you the run on server option in eclipe. You need to change project facet and add dynamic web module to it then you can run it on tomcat server from eclipse.Basically project needs to be web project.
After doing above if it gives error or do not run properly, check your project deployment assembly and add projects webapps folder in eclipse.
you need to have a tomcat installed in your eclipse and run it on the server.
Here is a tutorial to do this
You need to install the Web Tools Platform, which has support for the usual Web-application tools.

How to remove reference of a jar file in a java based web application?

I have a java based web application, which has certain java files and due to some need, i have added some jar files with in the project and made it project specific.
Now, While deploying them in production, I see, that the web file server (tomcat6) already has those jar files in its global library. Now, How do i remove reference of that jar file it, with out disturbing my code(which is working fine).
I saw in other article saying we just have to change the build path to refer the global library instead of local library.
Finally I have 2 questions.
How to do this?
If i'm working on windows and using path while configuring the build path, will it not be a problem if i deploy it in Unix environment.?
Please suggest. Also, its the problem with servlet-api.jar.
I use eclipse IDE. So how to perform these changes in eclipse?
Open your web project in eclipse and right click on the project. click on Properties and then choose build path and remove the jars you want to remove under the tab 'Libraries' and then export the war and deploy it in your tomcat6 server. if you want to run your web application in eclipse, you have to configure the server libraries by clicking 'Add Library' button in build path and then choose server runtime and choose the tomcat6 server configured in eclipse. Hope this helps

How to deploy Java project to Tomcat

I have downloaded a sample extjs+mysql+spring web project (link) with a java backend that I'd like to set up locally on my machine. I have installed Tomcat server, and MySQL DB but it's my first time ever with a java-based web application and I have troubles setting it up. Does it require any modifications ? I thought that .jsp files should be included there, but I can only see .java sources. Do I need to build it before it's ready for deployment ? Any help appreciated.
This is an Eclipse project so you'd need to run it from within Eclipse.
Download Eclipse
Open the project in it
Define a Tomcat container in your Servers tab
Drag and drop the project onto the newly defined Tomcat
Run it
if your are using eclipse IDE for development, create a project in eclipse,
run as "run on server" , and set the running server (eg TOMCAT 7).
and thats it,,
make sure, you correctly setup spring project in IDE with all needed jar files .

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