尝试使用maven-assembly
插件创建一个包含所有依赖项的胖jar文件。尝试了一堆东西,但最终与主类未找到错误。好像我碰到了一堵墙,现在在这里待了几个小时。运行由maven-assembly创建的可执行文件jar:错误:无法找到或加载主类
pom.xml
片段:
<project>
<modelVersion>4.0.0</modelVersion>
<groupId>foobar</groupId>
<artifactId>foobar</artifactId>
<version>1.0-SNAPSHOT</version>
<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-assembly-plugin</artifactId>
<configuration>
<outputDirectory>/home/jars/foobar/</outputDirectory>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
<archive>
<manifest>
<mainClass>com.foobar.Main</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>...</dependencies>
</project>
Maven的命令执行:
mvn clean compile assembly:single
mvn package assembly:single
mvn clean compile package assembly:single
创建在/home/jars/foobar/foobar-1.0-SNAPSHOT-jar-with-dependencies.jar
罐子如预期
MANIFEST.INF
在META-INF
Manifest-Version: 1.0
Archiver-Version: Plexus Archiver
Built-By: user
Created-By: Apache Maven 3.3.9
Build-Jdk: 1.8.0_131
Main-Class: com.foobar.Main
爪哇命令执行:
java -jar foobar-1.0-SNAPSHOT-jar-with-dependencies.jar
java -cp foobar-1.0-SNAPSHOT-jar-with-dependencies.jar com.foobar.Main
java -jar foobar-1.0-SNAPSHOT-jar-with-dependencies.jar -cp com.foobar.Main
全部返回相同的错误:Error: Could not find or load main class com.foobar.Main
OS:Fedora 25
java -version
openjdk version "1.8.0_131"
OpenJDK Runtime Environment (build 1.8.0_131-b12)
OpenJDK 64-Bit Server VM (build 25.131-b12, mixed mode
javac -version
javac 1.8.0_121
mvn --version
Apache Maven 3.3.9 (NON-CANONICAL_2016-07-01T11:53:38Z_mockbuild; 2016-07-01T17:23:38+05:30)
Maven home: /usr/share/maven
Java version: 1.8.0_131, vendor: Oracle Corporation
Java home: /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.131-1.b12.fc25.x86_64/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "4.10.13-200.fc25.x86_64", arch: "amd64", family: "unix"
解决:
的问题是,源代码没有得到编译。无法在胖罐中找到源代码jar。看起来像maven认为一定的包装结构。
加入以下<build>
解决这个问题:
<sourceDirectory>src/com/foobar</sourceDirectory>
试着看看.jar里面,看看Maven如何整理文件?你能看到你的班级吗?我为Spring引导应用程序构建了类似的问题,其中插件已将文件移动到兼容Spring引导的文件中,但无法使用“java -jar ...”运行 –
结果如果您尝试使用' maven install'? –
@MinhKieu就是这样!叹!似乎maven假定某个目录结构。通过添加' sourceDirectory>'来解决它。如果你能回答这个问题,我会将它标记为正确的。 –
user2354302