maven - 使用 Maven Shade 插件创建可执行 JAR

Question

我在从简单的 Java 程序制作可执行 jar 时遇到问题。

我关注了these Maven instructions并修改了我的 pom.xml:

<plugins>
  <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-shade-plugin</artifactId>
    <version>1.7</version>
    <executions>
      <execution>
        <phase>package</phase>
        <goals>
          <goal>shade</goal>
        </goals>
        <configuration>
          <transformers>
            <transformer implementation= 
           "org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
              <mainClass>package.MyClass</mainClass>
            </transformer>
          </transformers>
        </configuration>
      </execution>
    </executions>
  </plugin>
</plugins>

当执行 install 目标时，我可以读到这一行:

[INFO] Replacing /home/project-1.0.0.jar with /home/project-1.0.0-shaded.jar

但我在该位置只能找到 project-1.0.0.jar，它实际上包含依赖项 - 并且具有正确的大小 - 但是当尝试使用我的 jre 执行它时，它说:

The file '/home/project-1.0.0.jar' is not marked as executable.

因此什么都不会执行!

如何让我的 jar 正确执行？

感谢您的帮助!

Answer 1

Given is the pom.xml to create an executable jar file

<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.executablejar</groupId>
<artifactId>demo</artifactId>
<packaging>jar</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>demo Maven Webapp</name>
<url>http://maven.apache.org</url>

<properties>
    <java-version>1.8</java-version>
    <docker.image.prefix>springDemo</docker.image.prefix>
</properties>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.3.3.RELEASE</version>
</parent>

<dependencies>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-tomcat</artifactId>
    </dependency>

    <dependency>
        <groupId>org.apache.tomcat.embed</groupId>
        <artifactId>tomcat-embed-jasper</artifactId>
    </dependency>

</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
    <finalName>demo</finalName>
</build>