maven-assembly-plugin 和 maven-shade-plugin 比较

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maven-assembly-plugin 和 maven-shade-plugin

Flink scala 打包报错

Exception in thread "main" com.typesafe.config.ConfigException$UnresolvedSubstitution: reference.conf 
@ jar:file:/Users/wending/IdeaProjects/flink-scala/target/flink-scala-1.0-SNAPSHOT.jar!/reference.conf: 804: Could not resolve substitution to a value: ${akka.stream.materializer}

分析

reference.conf 多个jar包都有这个文件，同名文件会覆盖导致这个不能解析${akka.stream.materializer}这不能被解析
看打包方式为maven-assembly-plugin，原来这个插件有BUG

<plugins>
           <plugin>
               <artifactId>maven-assembly-plugin</artifactId>
               <configuration>
                   <appendAssemblyId>false</appendAssemblyId>
                   <descriptorRefs>
                       <descriptorRef>jar-with-dependencies</descriptorRef>
                   </descriptorRefs>
                   <archive>
                       <manifest>
                           <!-- 此处指定main方法入口的class -->
                           <mainClass>com.link.StreamingJob</mainClass>
                       </manifest>
                   </archive>
               </configuration>
               <executions>
                   <execution>
                       <id>make-assembly</id>
                       <phase>package</phase>
                       <goals>
                           <goal>assembly</goal>
                       </goals>
                   </execution>
               </executions>
           </plugin>
       </plugins>

插件比较

打包插件	同名文件处理
maven-assembly-plugin	覆盖
maven-shade-plugin	追加

maven-shade-plugin 使用

   <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>3.2.1</version>
                <configuration>
                    <transformers>
                     <!--对这个同名文件进行追加处理-->
                        <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                        <resource>reference.conf</resource>
                        </transformer>
                         <!--设置主函数-->
                        <transformer
                                implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                            <mainClass>com.daojia.flink.StreamingJob</mainClass>
                        </transformer>
                    </transformers>
                </configuration>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>

结果

遇到这种问题，使用maven-shade-plugin解决