Java依赖项-运行时插件ClassNotFoundException

Question

我在我的项目中使用TwelveMonkeys库(com.twelvemonkeys.imageio:imageio-tiff:3.1.1)。此外，我正在使用Maven和maven-依赖-插件一起构建我的项目，并将其配置如下：

<plugin>
    <!-- Get the dependencies jar files to a common place, for jar signing -->
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-dependency-plugin</artifactId>
    <executions>
        <execution>
            <id>unpack-dependencies</id>
            <phase>prepare-package</phase>
            <goals>
                <goal>unpack-dependencies</goal>
            </goals>
            <configuration>
                <includeArtifactIds>commons-net,imageio-psd,imageio-tiff</includeArtifactIds>
                <!-- <includeGroupIds>com.twelvemonkeys.imageio</includeGroupIds> -->
                <outputDirectory>${project.build.directory}/classes</outputDirectory>
            </configuration>
        </execution>
    </executions>
</plugin>

该项目正在正确编译，但它在运行时抱怨ClassNotFoundException: com.twelvemonkeys.io.enc.Decoder。我猜，includeArtifactIds不包括它内指定的库的依赖项(嵌套依赖项)。这就是我如何在我的TwelveMonkeys库中包含pom.xml：

<dependencies>  
    ...
    <dependency>
        <groupId>com.twelvemonkeys.imageio</groupId>
        <artifactId>imageio-psd</artifactId>
        <version>3.1.1</version>
    </dependency>
    <dependency>
        <groupId>com.twelvemonkeys.imageio</groupId>
        <artifactId>imageio-tiff</artifactId>
        <version>3.1.1</version> <!-- Alternatively, build your own version -->
    </dependency>
    ...
</dependencies>

有人能建议我如何在我最后的FAT JAR文件中包含imageio-tiff和imageio-psd所依赖的所有库吗？应该有更好的方法来指定“包含所有依赖项，并有自己的依赖项”。

编辑：

我还使用ProGaurd进行模糊处理，配置如下：

<plugin>
    <groupId>com.github.wvengen</groupId>
    <artifactId>proguard-maven-plugin</artifactId>
    <version>2.0.10</version>

    <dependencies>
        <dependency>
            <groupId>net.sf.proguard</groupId>
            <artifactId>proguard-base</artifactId>
            <version>5.2</version>
            <scope>runtime</scope>
        </dependency>
    </dependencies>

    <executions>
       <execution>
           <phase>package</phase>
           <goals><goal>proguard</goal></goals>
       </execution>
    </executions>
    <configuration>
        <proguardVersion>5.2</proguardVersion>

        <obfuscate>true</obfuscate>
        <injar>${project.build.finalName}.jar</injar>
        <outjar>${project.build.finalName}.jar</outjar>
        <outputDirectory>${project.build.directory}</outputDirectory>

        <options>
            <option>-allowaccessmodification</option>
            ...
            <option>-keep public class com.twelvemonkeys.** { *; }</option>
        </options>
        <libs>
            <lib>${java.home}/lib/rt.jar</lib>
            <lib>${java.home}/lib/jsse.jar</lib>
            <lib>${java.home}/lib/jce.jar</lib>
            <lib>${java.home}/lib/plugin.jar</lib>
        </libs>
    </configuration>
</plugin>

Answer 1

这是我的pom.xml的一部分，用于构建一个包含所有依赖项的.JAR文件。

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-assembly-plugin</artifactId>
            <version>2.4</version>
            <configuration>
                <descriptorRefs>
                    <descriptorRef>jar-with-dependencies</descriptorRef>
                </descriptorRefs>
            </configuration>
            <executions>
                <execution>
                    <id>make-assembly</id>
                    <phase>package</phase>
                    <goals>
                        <goal>single</goal>
                    </goals>
                </execution>
            </executions>
         </plugin
    </plugins>
</build>

并添加到您的依赖：

<scope>compile</scope>

我通常按以下顺序构建一个罐子：

• Maven清洁
• Maven编译
• Maven软件包

这对我来说包括了所有的库。