Eclipse+Maven src/main/java not visible in src fol

问题:

I'm wondering why I can't see following folders in src node in Package Explorer

src/main/java
src/main/resources
src/test/java
src/test/resources

I can access those folders as direct children of the project and they exist in the file system.

I'm using Spring Tool Suite (STS of Eclipse).

Maybe I can configure Eclipse somehow ?

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回答1:

Eclipse filters out folders that are marked as source from the "raw" folder path. That is, they are visible only as source folders:

If you can't see them in either place, then they

• are either filtered out in the settings: check your settings for Package Explorer (the Package Explorer bar, downwards menu arrow -> Filters...)
• or they were created externally and Eclipse haven't noticed them: Refresh your project in this case.
• or they don't exist: right-click on the project, select New->Folder and input the path, e.g. src/test/java (not "Source Folder"). After you use Maven->Update Project... on the project, they will be automatically added as source folders, provided you have the default configuration.

Now, as I said, those folder will only be used as source if you preserved the default configuration in your POM. If you defined other resources and/or testResources, those will be used instead. In general, Eclipse m2e synchronizes Eclipse's project source folder configuration with what's in your POM.

EDIT: maybe this is unclear - see those folders at the top? The ones labeled with the /-separated paths? These are your folders. These are the same folders that you would expect to find in main and test, just represented differently.

回答2:

I have solved this issue by below steps:

1. Right click the Maven Project -> Build Path -> Configure Build Path
2. In Order and Export tab, you can see the message like '2 build path entries are missing'
3. Now select 'JRE System Library' and 'Maven Dependencies' checkbox
4. Click OK

Now you can see below in all type of Explorers (Package or Project or Navigator)

src/main/java

src/main/resources

src/test/java

回答3:

I used to get the same problem, but solved it by pointing to the right jre used for the project.

Right click on the project properties java builpath see the jre selected edit it select alternate jre installed jre select the right one ok After changing right click on project>maven>update project

Hope it helps. Attaching screen shot.

回答4:

I had the same problem, I changed my Eclipse project view from Package explorer to Project Explorer.

回答5:

I used this tutorial to create my maven web project http://crunchify.com/how-to-create-dynamic-web-project-using-maven-in-eclipse/ and eclipse did not create src/main/java folder for me. When i tired to create the source folder src/main/java eclipse did not let me. So i created the folder outside eclipse in the project directly and then src/main/java appeared in eclipse.

回答6:

This error happens when there are no files inside /src/main/java Just make some empty files inside and the problem will go away.

A side note: lots of version control systems (mercurial for example) do not commit folders if there are no files inside.

回答7:

I was not able to see the build path option in the properties as well. Also the

src/main/java

was not visible in Project Explorer. below solution worked for me

1. Go to Project root
2. Select "Project facets" from Properties
3. Check "Java"

This fixes the issue

回答8:

I have solved as suggested by Ranjit shekhar. thanks alot Ranjith

Right click the Maven Project -> Build Path -> Configure Build Path In Order and Export tab, you can see the message like '2 build path entries are missing' Now select 'JRE System Library' and 'Maven Dependencies' checkbox Click OK Now you can see below in all type of Explorers (Package or Project or Navigator)

src/main/java

src/main/resources

src/test/java

回答9:

Right click the Maven Project -> Build Path -> Configure Build Path Go to Order and Export tab, you can see the message like '2 build path entries are missing' Now select 'JRE System Library' and 'Maven Dependencies' checkbox Click OK

回答10:

If you are looking for Simple/quicker way, you can follow this solution.

Right click on your project. Goto >Build Path > Configure Build Path> Java Build Path > inside 'Source' tab.>your can see like <<project-name>>/src/main/java(missing). Click on it and remove it.now Click on Apply and Close. Again right click on project and >New > Source folder > add source folder "src/main/java".

回答11:

I had a similar issue when I checked out a web project from a github repo on my eclipse. src/main/java was directly inside the project root in Package Explorer. My expectation was that src/main/java be visible inside a source folder "Java Resources". There were few things which I did to achieve this.

1. Right click on Project > Build Path > Configure Build Path..
2. Select filter "Java Build Path" and click on Tab "Libraries" Verify your "JRE System Library". If it is not pointing to your latest JDK, then you can click on Edit Button and follow the subsequent dialog boxes to select most appropriate JDK home path in your system. Once done click Apply, Apply and Close, Finish to close all the associated open boxes for the current filter.
3. Select filter "Java Compiler" and ensure your JDK Compliance points to correct JDK. Click Aapply
4. Select filter "Project Facets". Ensure both Java and Dynamic Web Module is selected with correct version.
5. Click Apply and Close.
6. Source folder "Java Resources" gets created with src/main/java in it when viewed in Project Explorer.