mvnw.cmd for demo spring-boot project not working in windows

Question

I generated a simple demo project (2.3.0 version) from Spring Initializr to my windows 8.1 OS and below is the basic structure

C:.
└───src
    ├───main
    │   ├───java
    │   │   └───com
    │   │       └───example
    │   │           └───demo
    │   └───resources
    └───test
        └───java
            └───com
                └───example
                    └───demo

I tried running mvnw.cmd clean and getting bellow error:

C:\Users\Downloads\demo\demo>mvnw.cmd clean
"}" was unexpected at this time.

Below is the same output in powershell

PS C:\Users\Downloads\demo\demo> .\mvnw.cmd clean
"}" was unexpected at this time.
PS C:\Users\Downloads\demo\demo>

I see the issue is occurring in following lines within mvnw.cmd file :

powershell -Command "&{"^
    "$webclient = new-object System.Net.WebClient;"^
    "if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
    "$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
    "}"^
    "[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^
    "}"

Not sure if i am missing anything.

Alasdair

Did you run this in cmd or powershell? Try to run it in powershell – Evvie

yes i tried in cmd and powershell and was getting the same error – Alasdair

Try to use a different version of mvnw – Evvie

@Alasdair did you find a solution to this? – Kilkenny

@ValentinDespa Not yet but strangely i see this issue only on my machine. I did try the same in another machine and worked fine. – Alasdair

I have this error only in the Jenkins workspace folder. I have opened a bug report here: issues.apache.org/jira/projects/MWRAPPER/issues/MWRAPPER-4 – Kilkenny

issue issues.apache.org/jira/browse/MWRAPPER-48 opened: please contact us here – Rapp

Happens to me with Maven 3.8.4, generated wrapper with 3.1.0 version. ``` Edition Windows 10 Enterprise Version 20H2 Installed on ‎2/‎28/‎2022 OS build 19042.1526 Experience Windows Feature Experience Pack 120.2212.4170.0 ``` – Greenock

Answer 1

I've just had the same problem, error in both cmd and powershell. Simply copying the project to an alternative directory solved the problem.

Im on windows 10, the project was originally in my downloads directory. I moved this into documents.

Sam

Answer 2

Testes and i worked on this path: C:\tmp\New (2){6} folder\my-app57(2). The problem is the ')' character.

My solution is:

@setlocal EnableDelayedExpansion
    powershell -Command "&{"^
          "$webclient = new-object System.Net.WebClient;"^
          "if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
          "$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
          "}"^
          "[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '!WRAPPER_JAR!')"^
          "}"
@endlocal

https://issues.apache.org/jira/browse/MWRAPPER-76

Marciamarciano