I have a web dynamic project on eclipse running on Tomcat.
I need to add the dependency of the JWT library on Maven dependencies. So I configured my project to Maven, and the I added the dependency on the pom.xml.
Now eclipse doesn't resolve my dependency, for example if I import a package of JWT there is a red line that highlights my import.
But there is another problem:
all the library that I imported like hibernate, apache-common (that I previously copied in WEB-Lib) that before worked, now are unresolved.
How may I face this problem? This is the first time using Maven, so if I'm wrong in something, please tell me.
Thanks in advice.
<dependency>
<groupId>io.jsonwebtoken</groupId>
<artifactId>jjwt</artifactId>
<version>0.6.0</version>
</dependency>
This dependency worked for me
Related
I was just about to get started with the vaadin start project (https://start.vaadin.com/). I downloaded it and imported it into eclipse. However after that I got a Maven import error on line 112+ telling me there is a "Missing artifact org.vaadin.artur:a-vaadin-helper:jar:1.5.0"
<dependency>
<groupId>org.vaadin.artur</groupId>
<artifactId>a-vaadin-helper</artifactId>
<version>1.5.0</version>
</dependency>
All other dependencies can be resolved. I do not have a custom settings.xml for maven. Refreshing does not help.
The artifact is located in the Vaadin Addons repository (for which there is a definition in the pom.xml). Perhaps you are using a Maven proxy that does not include this repository?
I am using spring-boot, and experienced an error similar to the one described here. I added the following to my pom.xml.
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId><!--$NO-MVN-MAN-VER$-->
<version>1.1.0.Final</version>
</dependency>
I am overriding the validation-api 1.0.0 dependency defined in my parent pom.xml, by way of Spring boot, and this gives the pesky warning message:
Overriding managed version 1.0.0.GA for validation-api
How can I permanently suppress this warning message in Eclipse? It shows up both in my pom.xml and my problems view.
When that warning shows up, you can open the Quick-Fix menu on the warning (Ctrl+1) and select
Ignore this warning
This will add the comment on the version line, like :
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>1.1.0.Final</version><!--$NO-MVN-MAN-VER$-->
</dependency>
Your problem is you manually added that comment on the wrong line.
Since the project is using spring-boot, a more proper answer could be found here: https://stackoverflow.com/a/35385268/1568658
(And since I got the same issue, and the above answer also is not very complete. I would add an answer here.)
Reason of issue:
spring-boot has defined many dependencies & their versions, when you use spring-boot as parent, these dependencies got inherited, and overriding one of the dependency with a different version would get the warning, because it might break other libraries' dependencies.
Solution:
Define a property for that dependency between <properties></properties>, to specify the version.
e.g
<properties>
<reactor.version>2.5.0.BUILD-SNAPSHOT</reactor.version>
</properties>
How to find the property name:
Open your pom.xml in IDEA or Eclipse.
Ctrl + Click on the <parent> tag to open pom of parent, and need to click twice recursively to finally get to the pom file with artifactId as spring-boot-dependencies.
Once you have opened that pom, search for your dependency, e.g servlet-api, and you can see the default version.
There is a document from spring explains it better: https://spring.io/blog/2016/04/13/overriding-dependency-versions-with-spring-boot
Enter version that you need in main pom.
This warning means that you are trying to override artifact version that is defined in your main (top level) pom. Just enter version that you need in main pom and you don't even need to use <version /> in other poms for this dependency.
My issue is with lombok.jar version. I do have multiple lombok versions and eclipse somehow taking a version but it detected more versions so unable to pick it's version. So I went to maven folder (.m2) and deleted the extra versions of lombok, did maven update on project, error gone.
But I haven't provided lombok version anywhere, eclipse choose a version, don't know how.
useful ! I resolve the problem. As the module pom file declare 9.2.12.M0 while the spring-boot refer to the V9.3 . I overwrite the V9.2 in the parent pom file. follow by "Eric Wang"
I have the lombok plugin in Eclipse and enabled annotation processing in Eclipse under java compiler, but still it is unable to recognize the log statements when I use #Slf4j annotation.
Do we have to make any other settings?
You also have to install Lombok into Eclipse.
See also this answer on how to do that or check if Lombok is installed correctly.
Full Disclosure: I am one of the Project Lombok developers.
I also faced the similar issue on log and #Slf4j on my STS environment. To resolve this, here is what I did on spring tool suite (sts-4.4.0.RELEASE) and lombok-1.18.10.jar (current latest version available in mavenrepository).
If having maven project, ensure lombok dependency added to it. Else you need manually add the jar to your project classpath.
<!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.10</version>
<scope>provided</scope>
</dependency>
Clean build the maven application. This will download lombok jar in your .m2 location by default from maven repository.
The path would be org\projectlombok\lombok\1.18.10\
Now open command prompt and navigate to the lombok path and execute command java -jar lombok-1.18.10.jar
C:\xxx\xxx\org\projectlombok\lombok\1.18.10>java -jar lombok-1.18.10.jar
Opens up lombok dialog box. If see message Can't find IDE
Click Specify location...
Provide the path to your STS root location
My case it is
C:\apps\sts-4.4.0.RELEASE\SpringToolSuite.exe
Install/Update
Install successful
Click Quit Installer
Now in explorer navigate to your STS root path.
C:\apps\sts-4.4.0.RELEASE\
We see lombok.jar placed in the sts root path
Now edit in notepad SpringToolSuite4.ini file
We see following appended at the end
-javaagent:C:\apps\sts-4.4.0.RELEASE\lombok.jar
Start STS using SpringToolSuite4.exe
Clean, rebuild your project.
So like others, i also faced this issue. Below is what I did.
Installed lombok.jar like explained here.
Tried restarting eclipse. (Did not work)
Tried refreshing gradle project. (Did not work)
tried what Hervian suggested in his answer here. (Did not work)
Closed the projects, deleted from workspace and then re-imported. Bam!! Worked.
I got the same error even after Lombok was installed. For me the solution was to add another lombok annotation (i used #Data) to my class after which the eclipse errors went away. Perhaps this force refreshed some cache.
Of course, I simply deleted the #Data annotation afterwards.
this got the fix to me by adding the slf4j dependency, Lombok can identify the slf4j but does not get the download, this is true for java project if you are using spring boot then slf4j comes by default.
here are my dependencies
<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-api -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.25</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.6</version>
<scope>provided</scope>
</dependency>
I'm new to Maven, and struggling with adding dependencies. I'm trying to convert an existing project to Maven, and after adding the dependencies for all the jars in my referenced libraries, I'm receiving an error message about missing artifacts:
Missing artifact stax:stax:jar:1.0
Missing artifact clover:clover:jar:1.3-rc4
Missing artifact log4j:log4j:bundle:1.2.16
Missing artifact stax:stax-ri:jar:1.0
From reading this post: How to handle Maven missing artifact errors?, it sounds like I need to manually download these jars and add them to my local maven repository. My question is how do I find these jars? I tried googling them, and I can find jars that have similar names, but not exactly like these, so I'm not sure if they're the right jars.
Any tips for dealing with this problem? The log4j jar is the only one explicitly listed in the referenced libraries of my original project, so I'm guessing the other ones are required by other jars that I have, and I don't know where to find them or what their exact names should be.
Thanks!
Thanks to everyone for responding. The actual cause of the problem is that for each of those 3 missing artifacts, for some reason, when Maven downloaded them into my local repository, .lastUpdated was appended to the end of the jar. For example, stax-1.0.jar.lastUpdated. This is the reason Maven could not find stax-1.0.jar.
So, to fix this problem, I had to manually download stax-1.0.jar, then install it into the local maven repository in the exact same place as the messed up file, so that Maven could find it. (For example, using the command:
mvn install:install-file -Dfile=<path-to-file>/stax-1.0.jar
-DgroupId=stax -DartifactId=stax -Dversion=1.0 -Dpackaging=jar
Using the same exact groupId and artifactId as the existing, incorrect file was crucial in order for maven to find it.
You can find dependency search Sites under maven.apache.org. Go to the left side Navigation Menü entry FAQ (official) and Thun to end of page.
It's more likely that your POM definition is not correct for log4j. Everything relating to log4j should be readily available in maven.
Also, if you know the name of the bundle (such as log4j) you can almost always do a quick google search "[bundle name] maven pom" within the first few hits you should either get the maven repo containing a quick snippet on how to include it, or the actual website for the bundled up jar and the maven instructions.
For example log4j:
<dependencies>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.16</version>
</dependency>
</dependencies>
Sometimes though you just need to specify the repository to find the item in (if it's not hosted in the greater maven repositories)
You can specify a new repository like so
<repositories>
<repository>
<id>Java.Net</id>
<url>http://download.java.net/maven/2/</url>
</repository>
</repositories>
Finally when you absolutely cannot find the artifact already maven'd up for you (this is usually true for proprietary jars and or drivers that you cannot include with your project) you can have the user manually install the item via command line
mvn install:install-file -DgroupId=[group-id] -DartifactId=[artifact-id] -Dversion=[version] -Dfile=/path/to/the/file -Dpackaging=[type]
You can then reference it in your maven file using the information described above
For example I have a custom reference for a salesforce.com project
mvn install:install-file -DgroupId=com.salesforce -DartifactId=wsc -Dversion=22 -Dfile=\tsclient\H\development\java\wsc-22.jar -Dpackaging=jar
To access it in maven:
<dependency>
<groupId>com.salesforce</groupId>
<artifactId>wsc</artifactId>
<version>22</version>
</dependency>
Finally, you can find the jars (or their maven info) at their respective websites (please note I'm just basing these links off the jar names, these may not be the actual websites, well sans the log4j which I know to be correct)
Stax
Clover
Log4j
Use maven search or mvnrepository.com. If you can not find use google looking for jar in other public repositories, for example for stax:
maven stax-ri pom
My first result is:
http://maven.nuxeo.org/nexus/content/groups/public/stax/stax-ri/1.0/
Other public repositories:
http://download.java.net/maven/2
http://download.java.net/maven/1
http://repository.codehaus.org
http://repository.jboss.org/nexus/content/groups/public-jboss
http://maven.springframework.org/release
you can try to add new repositories to your pom.xml
<repositories>
<repository>
<id>java.net</id>
<url>http://download.java.net/maven/2/</url>
</repository>
<repository>
<id>jboss</id>
<url>http://repository.jboss.com/maven2</url>
</repository>
</repositories>
After several days this stupid error bugged me, I found the following article
The author describes that there is a workspace repository, which may out of date. In my case it helped just to import the correct plugins again. The workspace repository has been updated and everything is fine.
Your problem might be something to do with MNG-4142. This bug means that maven will not download a new snapshot if localCopy is set to true in the artifact maven-metadata-local.xml.
Note that the title of this bug is slightly misleading so it is work reading the comments.
You might think that using the -U flag with maven would fix this problem but apparently this is not the case.
The current workaround seems to be searching for all instances of maven-metadata-local.xml and changing the value of localCopy to false.
I solved this problem by changing the log4j version from 1.2.15 to 1.2.16.
It also could be cause by the dom4j. The same error occurred when I use the following settings.
<dependency>
<groupId>dom4j</groupId>
<artifactId>dom4j</artifactId>
<version>20040902.021138</version>
</dependency>
After changing to the following, the error disappeared.
<dependency>
<groupId>dom4j</groupId>
<artifactId>dom4j</artifactId>
<version>1.6.1</version>
</dependency>
I've created a Maven project and added the dependencies (jar files) that I need; however, netbeans says that it still cannot find it.
Specifically in my case, I added the jmf-2.1.1e.jar file into my dependencies folder. When I go back to my program it still gives me the compile error that it cannot find the javax.media package.
Did you let Netbeans manage the dependency?
In your "Projects" listing, find and context+click on the "Dependencies" folder in the list. From the context menu, choose "Add Dependency".
This approach works at least in NetBeans 7.4 and 8.0 beta.
Make sure that your pom.xml has the following snippet that defines the dependency
<dependencies>
<dependency>
<groupId>javax.media</groupId>
<artifactId>jmf</artifactId>
<version>2.1.1e</version>
</dependency>
</dependencies>
The dependency is available in Maven Central. Add the pom snippet manually to the pom.xml and run Maven in the shell and let it download the dependency. This should resolve your issue.
Maven automatically downloads the dependency once specified in the pom.xml. For this you would have to build your project with the dependency as specified by Tim Sparg.