java – 如何创建一个胖罐子？

使用SpringBoot,您可以使用@SpringBootApplication注释,但与纯Java Java框架相同的是什么？

IntelliJ创建了一个Maven项目,我添加了spark依赖项,但是运行安装目标,我获得了一个没有清单的5 KB jar.不是可执行的jar.

到目前为止创建的pom.xml如下：

<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>sparkdemo</groupId>
  <artifactId>sparkdemo</artifactId>
  <version>1.0 </version>
  <packaging>jar</packaging>

  <name>sparkdemo</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>
    <dependency>
      <groupId>com.sparkjava</groupId>
      <artifactId>spark-core</artifactId>
      <version>2.5.4</version>
    </dependency>
  </dependencies>

  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.3</version>
        <configuration>
          <source>${java.version}</source>
          <target>${java.version}</target>
          <optimize>true</optimize>
          <debug>true</debug>
        </configuration>
      </plugin>
    </plugins>
  </build>

</project>

非常感谢任何建议….谢谢！

解决方法:

你需要的是一个可执行的jar,它不仅包含你的类,还包含所有依赖项中的类.
为此你可以使用Maven Assembly Plugin.

请参阅下面的示例代码.

<project>
  [...]
  <build>
    [...]
    <plugins>
      <plugin>
        <artifactId>maven-assembly-plugin</artifactId>
        <version>3.0.0</version>
        <configuration>
          <descriptorRefs>
            <descriptorRef>jar-with-dependencies</descriptorRef>
          </descriptorRefs>
          <archive>
            <manifest>
              <mainClass>org.sample.App</mainClass>     // specify your main class here
            </manifest>
          </archive>
        </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>
      [...]
</project>

然后,运行mvn包,并且可执行jar应该位于文件夹目标中(名称类似于ProjectName-1.0-SNAPSHOT-jar-with-dependencies.jar).

标签：java,maven,intellij-idea,jar,spark-java
来源： https://codeday.me/bug/20190724/1523801.html