Cannot Resolve 'junit' with Junit 4.12 in my Maven project

Question

I am having an issue about the junit, the IDE cannot resolve symbol for 'junit' even if I have it installed:

If I changed junit to version 4.11, this problem will be solved, but every time I run the test, it will give me error and ask me to use junit 4.12 or higher version.

Here is my project dependencies:

Anyone knows how to solve it? I have finish everything, and just waiting for the test. Thanks in advance!

Run 'mvn clean package', gives compilation error:

score 1 · Answer 1 · answered Oct 14 '18 at 08:20

1

Two things you could try:

Right click on the project, go under Maven and click on Reimport
Go to File and select Invalidate Caches / Restart

answered Oct 14 '18 at 08:20

Thank you for your response, I tried the two ways, but the problem remains. – Ziru Liu Oct 14 '18 at 16:02
@ZiruLiu Are you able to run the tests from command line (for example via `mvn test`)? – Oct 14 '18 at 16:04
@ZiruLiu Also, what spring-boot version are you using? – Oct 14 '18 at 16:05
My spring boot version is 2.0.5 – Ziru Liu Oct 14 '18 at 16:07
And ran `mvn test` gives the same compilation error as the screenshot I attached above. – Ziru Liu Oct 14 '18 at 16:09
If you look under ./m2/repository/junit/junit are you able to find the junit4.12 zip there? – Oct 14 '18 at 16:11
And did you override the default maven central repository in your setting.xml? – Oct 14 '18 at 16:14
Sorry, where is ./m2 folder, I am not able to find it. – Ziru Liu Oct 14 '18 at 16:14
C://Users/Ziru/.m2. You can see it in the terminal error. – Oct 14 '18 at 16:16
Is this the problem? – Ziru Liu Oct 14 '18 at 16:18
https://stackoverflow.com/questions/7600028/maven-error-in-opening-zip-file-when-running-maven – Oct 14 '18 at 16:18
See the above link, it seems you experience the same issue. – Oct 14 '18 at 16:18
And I am not sure how to override the default maven central repository, and where is setting.xml? Do you mean pom.xml? – Ziru Liu Oct 14 '18 at 16:20
No, maven uses a file called setting.xml (located in your .m2 folder) to define, among other things, from where to fetch your dependencies. – Oct 14 '18 at 16:24
If you did not override it ignore that suggestion, it is not the cause for your issue. – Oct 14 '18 at 16:24
Thank you so much, problem solved after I deleted m2 folder, and run `mvn clean package`. – Ziru Liu Oct 14 '18 at 16:34

Adina Rolea · Accepted Answer · 2018-10-14T16:33:35.907

1

Your project cached an older version. You don't have to set junit version, the annotation spring-boot-starter-test will take care of it. Please consider running clean command in terminal at parent root folder:

mvn clean

And reimport dependencies by clicking Manven Projects on the right and the first button:

If it does not work, maybe you installed an older version by mistake. You should run:

mvn clean package

UPDATE:

Your maven repository .m2 folder has multiple versions of junit. The simplest way is to delete and build the project again. The .m2 folder will be recreated automatically.

edited Oct 14 '18 at 16:33

answered Oct 14 '18 at 08:21

Adina Rolea

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Thank you for replying, I tried both ways, none of them work, and run 'mvn clean package' even gives the compilation error, and I added the screenshot above for your reference. – Ziru Liu Oct 14 '18 at 16:04
Is your test class is located in src/test/java folder? If it is in src/main/java it will not work – Adina Rolea Oct 14 '18 at 16:09
Yes, it is in the src/test/java folder, btw, I used start.spring.io to initiate the project. – Ziru Liu Oct 14 '18 at 16:10
Please try to delete .m2 folder and try again – Adina Rolea Oct 14 '18 at 16:12
great, delete it and run mvn clean package again – Adina Rolea Oct 14 '18 at 16:19

Cannot Resolve 'junit' with Junit 4.12 in my Maven project

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