运行具有外部 class 路径的可执行 JAR

Question

我使用 Maven 将我的项目编译成一个 JAR，其中包含除一个大依赖项之外的所有依赖项。依赖项的包含是使用：

<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.2.1</version>
<configuration>
    <archive>
      <manifest>
        <mainClass>com.mypackage.Main</mainClass>
      </manifest>
    </archive>
    <descriptorRefs>
        <descriptorRef>jar-with-dependencies</descriptorRef>
    </descriptorRefs>
</configuration>
<executions>
    <execution>
        <id>make-assembly</id> 
        <phase>package</phase>
        <goals>
            <goal>single</goal>
        </goals>
    </execution>
</executions>

使用 <scope>provided</scope>

排除依赖项

目标 myjar.jar 与 BigExternalJar.jar 在同一文件夹中，但是当我尝试运行:

java -cp ".:BigExternalJar.jar:myjar.jar" -jar myjar.jar

我因为缺少类而得到一个例外（那些类来自 BigExternalJar.jar）。

如何将依赖项打包到 JAR 中，仅使用 Maven，但仍然能够在类路径中添加其他 JAR？请注意，BigExternalJar 并不总是在同一文件夹中，因此我无法将其手动添加到 MANIFEST 文件中。

There are two similar questions that might look duplicate but they do not have an answer to this situation. Eclipse: How to build an executable jar with external jar? AND Running a executable JAR with external dependencies

Answer 1

如果使用 -jar 选项，类路径参数将被忽略。仅使用清单中提供的类路径。

Answer 2

<build>
    <plugins>
        <!-- compiler插件, 设定JDK版本 -->
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
                <source>1.7</source>
                <target>1.7</target>
                <encoding>UTF-8</encoding>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-shade-plugin</artifactId>
            <executions>
                <execution>
                    <phase>package</phase>
                    <goals>
                        <goal>shade</goal>
                    </goals>
                    <configuration>
                        <createDependencyReducedPom>false</createDependencyReducedPom>
                        <transformers>
                            <transformer
                                    implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                <mainClass>xxx.xxx.yourmain</mainClass>
                            </transformer>
                            <transformer
                                    implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                <resource>META-INF/spring.handlers</resource>
                            </transformer>
                            <transformer
                                    implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                <resource>META-INF/spring.schemas</resource>
                            </transformer>
                        </transformers>
                        <filters>
                            <filter>
                                <artifact>*:*</artifact>
                                <excludes>
                                    <exclude>META-INF/*.SF</exclude>
                                    <exclude>META-INF/*.DSA</exclude>
                                    <exclude>META-INF/*.RSA</exclude>
                                </excludes>
                            </filter>
                        </filters>
                    </configuration>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

请试试这个~~~所有外部 jar 将在您打包的 jar 中

运行具有外部 class 路径的可执行 JAR

Run an executable JAR with external class path

java

jar

classpath

executable-jar

maven

运行 具有外部 class 路径的可执行 JAR

Run an executable JAR with external class path

java

jar

classpath

executable-jar

maven

运行具有外部 class 路径的可执行 JAR