使用Shade-Plugin正确地最小化Uber Jar [英] Minimize an Uber Jar correctly, Using Shade-Plugin

问题描述

我使用Maven-Shade-Plugin创建一个可运行的Uber-jar。
根据此页<上的最后一帧/ a>，可以通过使用以下方式最小化jar的大小：

I am using the Maven-Shade-Plugin to create a runnable Uber-jar. According to the last frame on this page, the size of the jar can be minimized by using:

<configuration>
      <minimizeJar>true</minimizeJar>
</configuration>

但是这个功能没有考虑log4j.properties文件中声明的类。因此，例如 org.apache.log4j.appender.TimeAndSizeRollingAppender 未包含在Uber-jar中，即使它已在log4j.properties文件中声明。

But this feature does not take into consideration the classes that are declared in the log4j.properties file. Hence, e.g. org.apache.log4j.appender.TimeAndSizeRollingAppender is not included in the Uber-jar, even though it’s declared in the log4j.properties file.

我相信我会遇到与Spring相同的问题。如果我的代码只引用接口A而我的Spring文件包含实现A的B类实例化，那么B可能不会被添加到jar中，因为它不在代码中。

I believe I will face the same problem with Spring. If my code only refers to interface A and my Spring file contains an instantiation of class B that implements A, then B might not be added to the jar, since it’s not in the code.

如何解决这个问题？

推荐答案

此功能已添加到maven-shade的1.6版本中插件（刚刚发布）。 minimizeJar现在不会删除过滤器中特别包含的类。请注意，在过滤器中包含一些工件的类将排除该工件的非指定类，因此请确保包含所需的所有类。

This functionality has been added to version 1.6 of the maven-shade-plugin (just released). minimizeJar will now not remove classes that have been specifically included with filters. Note that including some of an artifact's classes in a filter will exclude non-specified classes for that artifact, so be sure to include all the classes that you need.

这是一个示例插件配置：

Here's an example plugin config:

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-shade-plugin</artifactId>
    <version>1.6</version>    
    <executions>
        <execution>
            <phase>package</phase>
            <goals>
                <goal>shade</goal>
            </goals>                        
            <configuration>
                <minimizeJar>true</minimizeJar>    
                <filters> 
                    <filter>
                       <artifact>log4j:log4j</artifact>
                       <includes>
                           <include>**</include>
                       </includes>
                    </filter> 
                    <filter>
                       <artifact>commons-logging:commons-logging</artifact>
                       <includes>
                           <include>**</include>
                       </includes>
                    </filter>                      
                </filters>
            </configuration>
        </execution>
    </executions>
</plugin>

要仅包含特定类，请使用过滤器中类名中的路径斜杠将它们添加为包含（再次，非包含类将被自动排除。）

To only include specific classes, add them as includes using path slashes in the class name in a filter (again, non-included classes will be automatically excluded).

<filter>
  <artifact>org.yourorg:your-artifact</artifact>
  <includes>
    <include>org/yourorg/yourartifact/api/*</include>
    <include>org/yourorg/yourartifact/util/*</include>
  </includes>
</filter>

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