[英]Error: Could not find or load main class while executing jar file
I have created two java file my maven project one is POJO class and another one is java main class file. 我已经在我的maven项目中创建了两个Java文件,一个是POJO类,另一个是Java主类文件。 I want to make my project as an executable jar file which i want to run externally using java -jar command. 我想将我的项目制作为可执行的jar文件,我想使用java -jar命令在外部运行。
Please find my pom.xml file 请找到我的pom.xml文件
<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>ElasticSearchUtility</groupId>
<artifactId>ElasticSearchUtility</artifactId>
<version>1.0.0-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.elasticsearch</groupId>
<artifactId>elasticsearch</artifactId>
<version>6.1.2</version>
</dependency>
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>elasticsearch-rest-high-level-client</artifactId>
<version>6.1.2</version>
</dependency>
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>rest</artifactId>
<version>5.1.2</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-eclipse-plugin</artifactId>
<version>2.9</version>
<configuration>
<downloadSources>true</downloadSources>
<downloadJavadocs>false</downloadJavadocs>
</configuration>
</plugin>
<!-- Set a compiler level -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<!-- Make this jar executable -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<configuration>
<excludes>
<exclude>**/log4j.properties</exclude>
</excludes>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<mainClass>com.es.utility.DocumentIndex</mainClass>
<classpathPrefix>dependency-jars/</classpathPrefix>
</manifest>
</archive>
</configuration>
</plugin>
<!-- Copy project dependency -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.5.1</version>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<!-- exclude junit, we need runtime dependency only -->
<includeScope>runtime</includeScope>
<outputDirectory>${project.build.directory}/dependency-jars/</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
While am executing my jar file using java -jar
command. 当使用java -jar
命令执行我的jar文件时。 Am getting the error 遇到错误
Error: Could not find or load main class com.es.utility.DocumentIndex
Please find my project structure also : 请也找到我的项目结构:
If there are no classes in the .jar it's probably because maven can't find them. 如果.jar中没有类,则可能是因为maven找不到它们。 The default path for java classes in Maven is src/main/java, try moving them there and run Maven again. Maven中Java类的默认路径是src / main / java,尝试将其移到那里并再次运行Maven。
To add to @kshetline's comment, make sure com.es.utility.DocumentIndex
is the correct path to your main class. 要添加到@kshetline的注释中,请确保com.es.utility.DocumentIndex
是主类的正确路径。 When you unzip the generated jar, DocumentIndex.class
should be in the com/es/utility
folder. 解压缩生成的jar时, DocumentIndex.class
应该位于com/es/utility
文件夹中。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.