我有一個包含org.apache.commons中的commons-vfs2庫的項目,我想用它來遮蔽它maven-shade-plugin,並將其最小化。maven-shade-plugin不包括org/apache/commons/vfs2/impl/StandardFileSystemManager
問題是,我在屏蔽jar後,運行它,它告訴我它找不到類org.apache.commons.vfs2.impl.StandardFileSystemManager。
事實上,創建的jar沒有這個類。陰影插件如何刪除該類?我怎麼能說這個插件保留這個類?
這是我的聚甲醛
<?xml version="1.0" encoding="UTF-8"?>
<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>blah</groupId>
<artifactId>MyApp</artifactId>
<version>1.0-SNAPSHOT</version>
<build>
<plugins>
<!-- Maven Source Plugin -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-source-plugin</artifactId>
<version>3.0.1</version>
<executions>
<execution>
<id>attach-sources</id>
<goals>
<goal>jar</goal>
</goals>
</execution>
</executions>
</plugin>
<!-- Maven JavaDoc Plugin -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-javadoc-plugin</artifactId>
<version>2.10.4</version>
<executions>
<execution>
<id>attach-javadocs</id>
<goals>
<goal>jar</goal>
</goals>
</execution>
</executions>
</plugin>
<!-- Maven Deploy Plugin -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
<!-- Maven Shade Plugin -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.0.0</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
</execution>
</executions>
<configuration>
<minimizeJar>true</minimizeJar>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>blah.MyMainFrame</mainClass>
</transformer>
</transformers>
</configuration>
</plugin>
</plugins>
</build>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<!-- Apache -->
<org.apache.commons.lang3.version>3.6</org.apache.commons.lang3.version>
<org.apache.commons.collections4.version>4.1</org.apache.commons.collections4.version>
<org.apache.commons.vfs2.version>2.1</org.apache.commons.vfs2.version>
<org.apache.commons.io.version>2.5</org.apache.commons.io.version>
<!-- Lombok -->
<org.projectlombok.version>1.16.18</org.projectlombok.version>
<!-- Jackson -->
<com.fasterxml.jackson.version>2.8.9</com.fasterxml.jackson.version>
<!-- Logging -->
<org.slf4j.version>1.7.25</org.slf4j.version>
<ch.qos.logback.version>1.2.3</ch.qos.logback.version>
<!-- JUnit -->
<junit.version>4.12</junit.version>
</properties>
<dependencies>
<!-- Apache -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>${org.apache.commons.lang3.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-collections4</artifactId>
<version>${org.apache.commons.collections4.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-vfs2</artifactId>
<version>${org.apache.commons.vfs2.version}</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>${org.apache.commons.io.version}</version>
</dependency>
<!-- Lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${org.projectlombok.version}</version>
</dependency>
<!-- Jackson -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>${com.fasterxml.jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${com.fasterxml.jackson.version}</version>
<exclusions>
<exclusion>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- Logging -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${org.slf4j.version}</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>${ch.qos.logback.version}</version>
</dependency>
<!-- JUnit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
我使用VFS2在此代碼:
import org.apache.commons.vfs2.FileListener;
import org.apache.commons.vfs2.FileSystemException;
import org.apache.commons.vfs2.FileSystemManager;
import org.apache.commons.vfs2.VFS;
import org.apache.commons.vfs2.impl.DefaultFileMonitor;
public class FileListenerManager{
private FileSystemManager fsManager;
private DefaultFileMonitor fm;
public FileListenerManager(FileListener fl) throws FileSystemException{
fsManager = VFS.getManager();
fm = new DefaultFileMonitor(fl);
start();
}
public void addFile(File file) throws FileSystemException{
fm.addFile(fsManager.resolveFile(file, file.getAbsolutePath()));
}
public final void start(){
fm.start();
}
public final void stop(){
fm.stop();
}
}
正如你可以看到有沒有(明確)參考StandardFileSystemManager。
我想插件來照顧什麼類或方法應該從最終的超級罐子去除。
從VFS.class文件,我可以看到,該方法VFS.getManager()我叫是
public static synchronized FileSystemManager getManager() throws FileSystemException{
if(instance == null){
instance = createManager("org.apache.commons.vfs2.impl.StandardFileSystemManager");
}
return instance;
}
我不知道爲什麼插件無法感知StandardFileSystemManager類的用法。
謝謝。
看到[這個評論](https://stackoverflow.com/questions/8817257/minimize-an-uber-jar-correctly-using-shade-plugin#comment35246837_9762835),這正是你的問題,你的選擇有。所以這個問題實際上是我所鏈接的問題的重複,我應該在評論中解釋,而不是回覆。 –
我最終按照你給出的鏈接提出的建議,並且遇到了另一個問題,java.lang.ClassNotFoundException:org.apache.commons.vfs2.provider.local.DefaultLocalFileProvider,儘管在我看來,這是正確的方式。我希望解決我所有的問題。謝謝 – marc