用于提供插件加载的ClassLoader
注意,本包中请勿添加任何其他依赖,否则可能会导致一些错误;
本加载器使用到了zip文件及其解析,相关理论文章参考:https://mp.weixin.qq.com/s?__biz=MzIxNDE0MDQwMA==&mid=2247483945&idx=1&sn=2e90b0ae7e38f0c1c4d1ebded62dda50&chksm=97ad56b6a0dadfa014c8e65b34a709a15fa139facc8063b39d5f658d95a780f580ed30b53af1&token=1915080617&lang=zh_CN#rd
使用打包插件打包:
<project>
<build>
<plugins>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<version>3.0.0</version>
<configuration>
<descriptors>
<!-- 打包描述文件 -->
<descriptor>fat.xml</descriptor>
</descriptors>
<!-- 这个很关键,打包的jar包只是存储,不压缩 -->
<archiverConfig>
<compress>false</compress>
</archiverConfig>
</configuration>
<executions>
<execution>
<id>make-assembly</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
项目根目录放入fat.xml
,内容如下:
插件描述xml详细说明文档:https://maven.apache.org/plugins/maven-assembly-plugin/assembly.html
<assembly xmlns="http://maven.apache.org/ASSEMBLY/2.1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/ASSEMBLY/2.1.1 https://maven.apache.org/xsd/assembly-2.1.1.xsd">
<id>fat</id>
<!-- 默认是true,应该修改为false,否则打出来的jar包中还会有一个根目录,根目录中存放的才是class和lib -->
<includeBaseDirectory>false</includeBaseDirectory>
<!-- 打包格式 -->
<formats>
<format>jar</format>
</formats>
<!-- 依赖 -->
<dependencySets>
<!-- 将除了plugin-loader外的其他依赖直接放到jar中的lib目录中,不解压缩 -->
<dependencySet>
<outputDirectory>/lib</outputDirectory>
<excludes>
<exclude>com.github.JoeKerouac:plugin-loader</exclude>
</excludes>
<!-- 是否将依赖解压,true表示解压 -->
<unpack>false</unpack>
</dependencySet>
<!-- 将项目class和plugin-loader解压缩放入jar包根目录,这样普通类加载器就能加载到 -->
<dependencySet>
<outputDirectory>/</outputDirectory>
<includes>
<include>${project.groupId}:${project.artifactId}</include>
<include>com.github.JoeKerouac:plugin-loader</include>
</includes>
<!-- 是否将依赖解压,true表示解压 -->
<unpack>true</unpack>
</dependencySet>
</dependencySets>
</assembly>