maven no main class in manifest

Tutorial created using: Other entries can be added to the MANIFEST.MF as well via key-value pairs in the section: If I attempt to execute the generated jar file via "java -jar aproject-1.0-SNAPSHOT.jar", we see the "Hello World!" Below the aim of the property : In JavaSW, an executable jarW file specifies its main class in the MANIFEST.MF file in that jar file. I think the maven-jar-plugin is ignored. Copyright © 2014 How do I build a jar file that contains its dependencies. Where do I put resources in my maven project? Windows Vista || JDK 1.6.0_04 || Eclipse Web Tools Platform 2.0.1 (Eclipse 3.3.1), "http://www.w3.org/2001/XMLSchema-instance", "http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd", http://maven.apache.org/shared/maven-archiver/index.html. When building with Eclipse (STS 3.6.2.RELEASE / Luna 4.4.1) the eclipse Maven build puts no manifest (and no META-INF at all) into the jars that get published. message that is output to the console as a result of the execution of com.maventest.App. Code Strategies The manifest does get built when I run maven myself. | Template: Free CSS Templates java -jar yourjar.jar my.package.Main. you get “no main manifest attribute”. no main manifest attribute, in “app.jar” Normally, if I had created the program myself, I would have added a main class attribute to the manifest file. If we perform a "mvn clean package" to build the project's jar file and then examine the MANIFEST.MF file that is generated in the jar file at META-INF/MANIFEST.MF, we see that it contains the following: I'll open a command prompt and go to the directory containing the jar file. When you run self-executable jar, java will look for the Main-Class in MANIFEST.MF file located under META-INF folder. In order to run the main method from our jar, we need to mention it inside the ‘Main-Class’ property of the manifest file (mainClass attribute in POM.xml in case of Mavenized application) which needs to be bundled with the code as well. How do I add my own manifest file to a jar file? Problem: no main manifest attribute, in "APPLICATION_NAME.jar" Same issue with “Pivotal tc Server v3.0” and with Tomcat 7. | Contact. This class is the one with the main method. Description: This tutorial describes how to specify a main class in the MANIFEST.MF file that gets automatically generated for a maven jar project. But in this case, since the file is from an application, i … Additional options that can be configured for the Maven Archiver can be found at http://maven.apache.org/shared/maven-archiver/index.html. This happens because the project is being built by Maven and the Main Class you specified in the Netbeans properties is not exported by Netbeans to Maven’s pom.xml file; in other words: Netbeans knows what your main class is but Maven doesn’t. We used maven-jar-plugin to handle jar content and manifest configuration, specially adding a Main-Class property to MANIFEST.MF file to specify the project main class. How do I specify a main class in the manifest of my generated jar file? If it is not able to find an entry,then it will complain with Unable to execute jar- file: “no main manifest attribute”.. MANIFEST.MF contains information about files contained in the Jar file. For a mavenSW project that features "jar" packaging, we can specify the main class for the MANIFEST.MF file by specifying it in our pom.xml, as shown here: This specifies that the com.maventest.App class in the project is the main class that should be executed if someone attempts to execute the jar file. There is no mention of a Main-Class ! MANIFEST.MF file in generated jar file Manifest-Version: 1.0 Archiver-Version: Plexus Archiver Created-By: Apache Maven Built-By: Cakes Build-Jdk: 1.6.0_04 Main-Class: com.maventest.App I'll open a command prompt and go to the directory containing the jar file. This snippet configures a special resource transformer which sets the Main-Class entry in the MANIFEST.MF of the shaded JAR.