嘗試使用maven-assembly
插件創建一個包含所有依賴項的胖jar文件。嘗試了一堆東西,但最終與主類未找到錯誤。好像我碰到了一堵牆,現在在這裏待了幾個小時。運行由maven-assembly創建的可執行文件jar:錯誤:無法找到或加載主類
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的命令執行:
mvn clean compile assembly:single
mvn package assembly:single
mvn clean compile package assembly:single
創建在/home/jars/foobar/foobar-1.0-SNAPSHOT-jar-with-dependencies.jar
罐子如預期
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
爪哇命令執行:
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
全部返回相同的錯誤: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"
解決:
的問題是,源代碼沒有得到編譯。無法在胖罐中找到源代碼jar。看起來像maven認爲一定的包裝結構。
加入以下<build>
解決這個問題:
<sourceDirectory>src/com/foobar</sourceDirectory>
試着看看.jar裏面,看看Maven如何整理文件?你能看到你的班級嗎?我爲Spring引導應用程序構建了類似的問題,其中插件已將文件移動到兼容Spring引導的文件中,但無法使用「java -jar ...」運行 –
結果如果您嘗試使用' maven install'? –
@MinhKieu就是這樣!嘆!似乎maven假定某個目錄結構。通過添加' sourceDirectory>'來解決它。如果你能回答這個問題,我會將它標記爲正確的。 –
user2354302