maven-assembly-plugin插件实现自定义打包

maven有三种插件可以用来打包：

• maven-jar-plugin，默认的打包插件，用来打普通的project JAR包；
• maven-shade-plugin，用来打可执行JAR包，也就是所谓的fat JAR包；
• maven-assembly-plugin，支持自定义的打包结构，也可以定制依赖项等

现有maven的普通java项目，项目根路径下有files文件夹，该文件夹下有一些文件

1、利用resource插件将files文件夹编译到target/classes目录下

<build>
  <resources>
    <resource>
      <directory>files</directory>
      <targetPath>/files</targetPath>
    </resource>
  </resources>
</build>      

2、利用maven-assembly-plugin插件将files文件夹以及项目依赖包一起打包

<build>
  <plugins>
    <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <configuration>
      <source>1.8</source>
      <target>1.8</target>
    </configuration>
  </plugin>
      
    <plugin>
      <artifactId>maven-assembly-plugin</artifactId>
      <configuration>
      <archive>
        <manifest>
        <mainClass>com.asiainfo.group.kafka_ui_client.ui.KafkaClientUI</mainClass>
        </manifest>
      </archive>
      <!-- <finalName>kafka_ui_client-1.0</finalName> -->
      <descriptors>
        <descriptor>assembly.xml</descriptor>
      </descriptors>
      <!-- <outputDirectory>E:/nomanager</outputDirectory> -->
      <appendAssemblyId>false</appendAssemblyId>
      </configuration>
        <executions>
        <execution>
          <id>make-assembly</id>
        <phase>package</phase>
          <goals>
          <goal>single</goal>
        </goals>
        </execution>
      </executions>     
    </plugin>
  </plugins>
</build>      

3、assembly.xml

<?xml version='1.0' encoding='UTF-8'?>  
<assembly xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.0"  
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.0  
                    http://maven.apache.org/xsd/assembly-1.1.0.xsd">  
    <id>make-assembly</id>  
    <formats>  
        <format>jar</format>  
    </formats>  
    <includeBaseDirectory>false</includeBaseDirectory>  
    <fileSets>  
        <fileSet>  
            <directory>${project.build.directory}/classes</directory>  
            <outputDirectory>/</outputDirectory>  
        </fileSet>  
        
    </fileSets>  
    
    
    <dependencySets>
        <!-- <dependencySet>
            <unpack>false</unpack>
            <scope>runtime</scope>
            <outputDirectory>lib</outputDirectory>
            <useProjectArtifact>false</useProjectArtifact>
        </dependencySet> -->
        
        <dependencySet>
            <outputDirectory>/</outputDirectory>
            <useProjectArtifact>true</useProjectArtifact>
            <unpack>true</unpack>
            <scope>runtime</scope>
        </dependencySet>
        <dependencySet>
            <outputDirectory>/</outputDirectory>
            <useProjectArtifact>true</useProjectArtifact>
            <unpack>true</unpack>
            <scope>system</scope>
        </dependencySet>
    </dependencySets>
    
</assembly>      

4、java如何读取jar包内部文件

//这个路径是jar包内的绝对路径，也是以target/classes作为根目录的绝对路径
InputStream in = ConsumerConfig.class.getResourceAsStream("/files/consumer.properties");