maven生成jar，运行却提示没有“没有主清单属性”

转自：http://www.jianshu.com/p/fd5bd8657852

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修改pom.xml

<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>com.mkyong</groupId>
<artifactId>App</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging><name>App</name>
<url>http://maven.apache.org</url><properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties><dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>1.2.1</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>com.mkyong.App</mainClass>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>

<mainClass>com.mkyong.App</mainClass>此处的内容去src/main/java中寻找
例如：

再运行mvn clean compile,mvn clean package,java -jar target/App-1.0-SNAPSHOT.jar

就看到可爱的Hello World!了.