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maven项目打jar包包含所有依赖运行相应主类程序
source link: https://cfonheart.github.io/2019/02/28/maven%E9%A1%B9%E7%9B%AE%E6%89%93jar%E5%8C%85%E5%8C%85%E5%90%AB%E6%89%80%E6%9C%89%E4%BE%9D%E8%B5%96%E8%BF%90%E8%A1%8C%E7%9B%B8%E5%BA%94%E4%B8%BB%E7%B1%BB%E7%A8%8B%E5%BA%8F/
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maven项目打jar包包含所有依赖运行相应主类程序
在项目的pom.xml中添加如下配置，可以使得在mvn clean install 打包的jar包包含了所有的依赖包。
否则你得自己手动运行java 的时候添加这些jar包所在的classpath，也就是java -cp
<build>
<plugins>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<version>3.1.0</version>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<classpathPrefix>lib/</classpathPrefix>
<mainClass>jdbc.BeelineJDBC</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>
</plugins>
</build>
指定主类：直接运行 java -jar xx.jar 的时候，会在这个jar包运行指定的主类，上述的pom.xml中也就是在
<mainClass>jdbc.BeelineJDBC</mainClass>
指定了主类为jdbc包下的BeelineJDBC类。
最后mvn clean install 就能在target中得到自己的jar包了。
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