Maven可执行文件Jar在启动时引发错误 [英] Maven executable Jar throws error on start
问题描述
首先:我是Maven的新手.我制作了第一个Maven应用程序,并在IDE中成功对其进行了测试.构建总是成功的,并且一切都像魅力一样.
First of all: I am new to maven. I made my first maven Application and successfully tested it within the IDE. The build was always successfull and everything worked like a charm.
现在我想将项目导出为具有内置依赖项的可执行jar,但是我不确定为什么它不起作用.
Now I want to export the project as an executable jar with the dependencies built in, but I am not quite sure why it is not working.
我在pom文件中添加了以下内容,因为这是我在类似问题的各种答案中找到的
I added the following to my pom file, as that was what I found on various answers to a similar question
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.4</version>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<mainClass>com.pwc.scfa.pensareautomatio3.Main</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
</build>
我知道这指定了JVM启动的主类,因为IDE不会自动设置它.
I understand that this specifies the main class for the JVM to start, as the IDE does not set this automatically.
我将jar放在目标目录中,将其复制到另一个目录并尝试执行.
I located the jar in the targets directory, copied it to another directory and tried to execute it.
可悲的是,抛出了以下错误:
Sadly the following errors are thrown:
您能给我一个提示,我可能在哪里出错了?那很好啊.(如果有帮助,我正在使用NetBeans.)
Can you please give me a hint, where I might have gone wrong? That would be great. (I am using NetBeans, if that is of any help.)
这是我的StackTrace:
Here is my StackTrace:
C:\Users\scfa\Desktop>java -jar PensareAutomatio-1.1.jar
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/poi/openxm
l4j/exceptions/InvalidFormatException
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
at java.lang.Class.privateGetMethodRecursive(Unknown Source)
at java.lang.Class.getMethod0(Unknown Source)
at java.lang.Class.getMethod(Unknown Source)
at sun.launcher.LauncherHelper.validateMainClass(Unknown Source)
at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.apache.poi.openxml4j.exceptions
.InvalidFormatException
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 7 more
谢谢:)
推荐答案
如果我是正确的,则maven-jar-plugin将使用所有已编译的.class文件创建一个jar,但没有依赖项.
If I'm correct, maven-jar-plugin creates a jar with all the compiled .class files, but without the dependencies.
我建议使用 maven-assembly-plugin 并将其绑定到软件包执行阶段,这样,当运行 mvn install
I'd recommend using maven-assembly-plugin and binding it to the package execution phase, that way it would be built when running mvn install
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<archive>
<manifest>
<mainClass>com.pwc.scfa.pensareautomatio3.Main</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
<executions>
<execution>
<id>make-assembly</id> <!-- this is used for inheritance merges -->
<phase>package</phase> <!-- bind to the packaging phase -->
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
有关更多信息,请参见此答案.
See this answer for more information.
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