spring-guides/gs-maven

Building Java Projects with Maven :: Learn how to build a Java project with Maven.

gs-maven's Issues

shade plugin: avoiding "Invalid signature"

As described in this blog post, if you try to include a jarsigner-signed dependency, you get a nasty "Invalid signature file digest for Manifest main attributes" stacktrace.

The blog above suggests adding the following snippet to the shade plugin <configuration> section.

          <filters>
            <filter>
              <artifact>*:*</artifact>
              <excludes>
                <exclude>META-INF/*.SF</exclude>
                <exclude>META-INF/*.DSA</exclude>
                <exclude>META-INF/*.RSA</exclude>
              </excludes>
            </filter>
          </filters>

I'm new to Maven and Shade, so I'm not sure what the security implications of doing this are, but I thought I should suggest it. Thanks for writing the guide; i found it very useful.

mvn compile throws errors

Hello,

I'm working on this guide, but when I run mvn compile I get the following error:

[ERROR] Source option 1.5 is no longer supported. Use 1.6 or later.
[ERROR] Target option 1.5 is no longer supported. Use 1.6 or later.

I'm on OS X. mvn -v shows:

Maven home: /Users/matthuntington/Desktop/apache-maven-3.5.0
Java version: 9, vendor: Oracle Corporation
Java home: /Library/Java/JavaVirtualMachines/jdk-9.jdk/Contents/Home
Default locale: en_US, platform encoding: UTF-8
OS name: "mac os x", version: "10.12.6", arch: "x86_64", family: "mac"

echo $JAVA_HOME shows:

/Library/Java/JavaVirtualMachines/jdk-9.jdk/Contents/Home

echo $PATH shows:

/Users/matthuntington/Desktop/apache-maven-3.5.0/bin/:/Users/matthuntington/.rbenv/bin:/Users/matthuntington/.rbenv/shims:/Users/matthuntington/anaconda/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin

any suggestions? Thanks!

`mvn compile` does not create 'target\classes' directory

I was going through the tutorial Building Java Projects with Maven on https://spring.io/guides/gs/maven/. It mentions that after mvn compile, target\classes directory will be created, but that does not happen. I get this directory after mvn package command and it only contains .jar files. Am I missing something?

MetaDataException bug when using DirContexAdapter to add member to group in Spring LDAP 2.0.0.RELEASE

OK . . . an obvious newb here . . . When I tried to enter this I was looking at a page about Spring LDAP. Now I come back and it seems to be filed under spring-guides/gs-maven. I don't know how that happened.

Until someone can give me a pointer on a tutorial for using this thing -- I'm going nowhere.

Following section 3.4 of the Spring LDAP Reference manual to use the DirContextAdapter and LdapTemplate for adding an attribute for a new user to a group, I get a MetaDataException thrown in the class ObjectMetaData (in the constructor) apparently because there are missing annotations in DirContextAdapter. I have all of this in a zip file with a README.txt, sample code, output, etc. but since this is the first bug I have ever reported, I don't have a clue as to how to provide this.

mvn package fails for demo build

Figured this one our myself.

Was getting the following error when using mvn package

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-jar-plugin:2.6:jar (default-jar) on
project gs-spring-boot: Execution default-jar of goal org.apache.maven.plugins:maven-jar- 
plugin:2.6:jar failed: An API incompatibility was encountered while executing 
org.apache.maven.plugins:maven-jar-plugin:2.6:jar: java.lang.ExceptionInInitializerError: null

I don't know exactly what caused it to be looking for an apparently incompatible version of the maven-jar-plugin-2.6.jar however simply adding the following under plugins in pom.xml fixed the issue.

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-jar-plugin</artifactId>
    <version>3.0.0</version>
</plugin>

no main manifest attribute, in target/gs-maven-0.1.0.jar

When I am trying to run the project using java -jar target/gs-maven-0.1.0.jar I am getting the error:

no main manifest attribute, in target/gs-maven-0.1.0.jar.

Is there something I'm missing?

How to run Jar file not explained.

Hi I am new to contributing thank you all for building this Spring tutorial!

I had issues with knowing how to run the executable jar file. After some research I found that running java -jar target/gs-maven-0.1.0.jar in the terminal worked.

I figured this could be useful to add to the guide for newer developers.

Minor: missing <dependencies> element in tutorial

Hi there,

Minor issue: In this section of the tutorial: https://github.com/spring-guides/gs-maven/blob/master/README.adoc#declare-dependencies, the part about inserting a <dependency> element doesn't mention putting it in a <dependencies> element as well.

Thanks,
Andrew

Completed Pom has <build> section but not explained in tutorial.

While working through the tutorial a section of xml code for build appears in the complete pom.xml but it is not explained prior.

brocken link?

include::https://raw.github.com/spring-guides/getting-started-macros/master/create_directory_structure_hello.adoc[]

Can i contribute?

Please let me know if you okay with this i can contribute some code 👨‍💻

mvn compile error

Hi,

The build is not going successfully through. Please check and let me know the issue/solution.

Final pom shade plugin clarification

The audience of this guide is programmers new to maven. The shade plugin is used in the final pom without giving any explanation. While I understand that details of the plugin is outside the scope of the guide, a simple one liner could be added why it is there (like: a maven plugin 'shade' is used to specify the main class for jar execution).

opened by accident - ignore