one jar with one class and main class from dependecy jar

问题

I am having one project with two classes named as Test1 and Test2.

Both Test1 and Test2 are not main classes. Now I have one dependency named cloudexe.jar which has a main class ClassExecuter. Now my issue is that I want ClassExecuter as the main class for both test1.jar and test2.jar.

test1.jar should contains only Test1 class and all its dependencies including cloudexe.jar similarly test2.jar should contains only Test2 class and all its dependencies including cloudexe.jar

Now when my package my pom.xml I gets test1.jar and test2.jar but I am getting like as shown below

Exception in thread "main" java.lang.NoSuchMethodException: com.uber.Test1.main([Ljava.lang.String;)
        at java.lang.Class.getMethod(Class.java:1678)
        at com.simontuffs.onejar.Boot.run(Boot.java:339)
        at com.simontuffs.onejar.Boot.main(Boot.java:166)

My pom.xml is given below

<build>
  <plugins>
  <plugin>
    <groupId>com.jolira</groupId>
    <artifactId>onejar-maven-plugin</artifactId>
    <version>1.4.4</version>
    <executions>
      <execution>
        <id>build-first</id>
          <configuration>
            <mainClass>com.uber.Test1</mainClass>
            <attachToBuild>true</attachToBuild>
            <classifier>onejar</classifier>
            <filename>test1.jar</filename>
          </configuration>
          <goals>
            <goal>one-jar</goal>
          </goals>
        </execution>
      <execution>
        <id>build-second</id>
          <configuration>
            <mainClass>com.uber.Test2</mainClass>
            <attachToBuild>true</attachToBuild>
            <classifier>onejar</classifier>
            <filename>test2.jar</filename>
          </configuration>
          <goals>
            <goal>one-jar</goal>
          </goals>
        </execution>
      </executions>
    </plugin>
  </plugins>
</build>

<pluginRepositories>
  <pluginRepository>
     <id>onejar-maven-plugin.googlecode.com</id>
     <url>http://onejar-maven-plugin.googlecode.com/svn/mavenrepo</url>
  </pluginRepository>
</pluginRepositories>

Can anyone please help me on this

回答1:

You need to have a parent with 2 child projects :

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.example</groupId>
  <artifactId>parent</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>pom</packaging>

  <modules>
    <module>test1</module>
    <module>test2</module>
  </modules>

</project>

Then you have 2 projects test1 and test2 projects, they will produce jars, use the shade pluging to have it execute the main class ClassExecuter :

<?xml version="1.0"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <modelVersion>4.0.0</modelVersion>

  <parent>
    <groupId>com.example</groupId>
    <artifactId>parent</artifactId>
    <version>1.0-SNAPSHOT</version>
  </parent>

  <artifactId>test1</artifactId>
  <packaging>jar</packaging>

  <dependencies>
      ... all your dependencies including cloudexe.jar
  </dependencies>

<build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>3.0.0</version>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                        <configuration>
                            <transformers>
                                <transformer
                                        implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                    <manifestEntries>
                                        <Main-Class>....ClassExecuter</Main-Class>
                                    </manifestEntries>
                                </transformer>
                            </transformers>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

        </plugins>
    </build>

</project>

来源：https://stackoverflow.com/questions/44582091/one-jar-with-one-class-and-main-class-from-dependecy-jar