如何阻止Maven在每次项目运行时解包

Question

我有一个JavaFX项目，它使用Hibernate ORM和Maven。每次运行项目时，我都要等待很长时间才能运行，因为Maven一直在解包Hibernate依赖项。这是必要的吗？或者我可以关掉它，为什么要一遍又一遍地打开所有东西而不是只打开一次？日志如下所示：

我的POMfile看起来是这样的：

<?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>com.hibernate</groupId>
<artifactId>SeedCalendar</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>

<name>SeedCalendar</name>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <mainClass>com.hibernate.seedcalendar.MainApp</mainClass>
</properties>

<organization>
    <!-- Used as the 'Vendor' for JNLP generation -->
    <name>Your Organisation</name>
</organization>

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-dependency-plugin</artifactId>
            <version>2.6</version>
            <executions>
                <execution>
                    <id>unpack-dependencies</id>
                    <phase>package</phase>
                    <goals>
                        <goal>unpack-dependencies</goal>
                    </goals>
                    <configuration>
                        <excludeScope>system</excludeScope>
                        <excludeGroupIds>junit,org.mockito,org.hamcrest</excludeGroupIds>
                        <outputDirectory>${project.build.directory}/classes</outputDirectory>
                    </configuration>
                </execution>
            </executions>
        </plugin>
         <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>exec-maven-plugin</artifactId>
            <version>1.2.1</version>
            <executions>
                <execution>
                    <id>unpack-dependencies</id>

                    <phase>package</phase>
                    <goals>
                        <goal>exec</goal>
                    </goals>
                    <configuration>
                        <executable>${java.home}/../bin/javafxpackager</executable>
                        <arguments>
                            <argument>-createjar</argument>
                            <argument>-nocss2bin</argument>
                            <argument>-appclass</argument>
                            <argument>${mainClass}</argument>
                            <argument>-srcdir</argument>
                            <argument>${project.build.directory}/classes</argument>
                            <argument>-outdir</argument>
                            <argument>${project.build.directory}</argument>
                            <argument>-outfile</argument>
                            <argument>${project.build.finalName}.jar</argument>
                        </arguments>
                    </configuration>
                </execution>
                <execution>
                    <id>default-cli</id>
                    <goals>
                        <goal>exec</goal>                            
                    </goals>
                    <configuration>
                        <executable>${java.home}/bin/java</executable>
                        <commandlineArgs>${runfx.args}</commandlineArgs>
                    </configuration>
                </execution>
            </executions>  
        </plugin>           
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.1</version>
            <configuration>
                <source>1.7</source>
                <target>1.7</target>
                <compilerArguments>
                    <bootclasspath>${sun.boot.class.path}${path.separator}${java.home}/lib/jfxrt.jar</bootclasspath>
                </compilerArguments>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-surefire-plugin</artifactId>
            <version>2.16</version>
            <configuration>
                <additionalClasspathElements>
                    <additionalClasspathElement>${java.home}/lib/jfxrt.jar</additionalClasspathElement>
                </additionalClasspathElements>
            </configuration>
        </plugin>
    </plugins>
</build>

<dependencies>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.2.9.Final</version>

谢谢你！

Answer 1

我已经为自己的问题找到了解决办法，让我来解释。

这个问题与javafxpackager无关。原因在于maven标准配置。默认情况下，Maven在每个项目运行时都执行一个项目清理。这将删除目标/类/文件夹。该文件夹是放置所有依赖项的解压缩jar文件的文件夹。如果它们在每次新运行时都被删除，那么它们就必须一次又一次地被解压。总之，以下是如何防止清洗发生的方法：

    <plugin>
  <artifactId>maven-clean-plugin</artifactId>
  <version>2.4.1</version>
  <configuration>
    <skip>true</skip>
  </configuration>
</plugin>

将此添加到pom.xml中。确保版本正确，您可以在有效pom中检查maven clean插件的版本（即父pom+项目pom的组合）。在netbeans中，当您打开项目的pom.xml文件时，您可以在effective选项卡下查看只读有效的pom.xml。

                    <execution>
                    <id>default-cli</id>
                    <goals>
                        <goal>exec</goal>                            
                    </goals>
                    <configuration>
                                <skip>true</skip>
                        <executable>${java.home}/bin/java</executable>
                        <commandlineArgs>${runfx.args}</commandlineArgs>
                    </configuration>
                </execution>

编辑2：这里有另一种方法来防止maven删除您的jar文件，同时保留在NetBeans中使用Clean的能力。

<plugin>
<artifactId>maven-clean-plugin</artifactId>
     <version>2.4.1</version>
<configuration>
    <excludeDefaultDirectories>true</excludeDefaultDirectories>
    <filesets>
        <!-- delete directories that will be generated when you 
             start the develpment server/client in eclipse  
        -->
        <fileset>
            <directory>target/classes</directory>
            <excludes>
                <exclude>**/*</exclude>
            </excludes>
        </fileset>
    </filesets>
</configuration>