解决maven-dependency-plugin (goals "copy-dependencies","unpack") is not supported

解决办法：在plugins之前添加如下pluginManagement，二者前后顺序如下：

 

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1. <build>  
2.         <pluginManagement>  
3.             <plugins>  
4.                 <plugin>  
5.                     <groupId>org.eclipse.m2e</groupId>  
6.                     <artifactId>lifecycle-mapping</artifactId>  
7.                     <version>1.0.0</version>  
8.                     <configuration>  
9.                         <lifecycleMappingMetadata>  
10.                             <pluginExecutions>  
11.                                 <pluginExecution>  
12.                                     <pluginExecutionFilter>  
13.                                         <groupId>org.apache.maven.plugins</groupId>  
14.                                         <artifactId>maven-dependency-plugin</artifactId>  
15.                                         <versionRange>[2.0,)</versionRange>  
16.                                         <goals>  
17.                                             <goal>copy-dependencies</goal>  
18.                                         </goals>  
19.                                     </pluginExecutionFilter>  
20.                                     <action>  
21.                                         <ignore />  
22.                                     </action>  
23.                                 </pluginExecution>  
24.                             </pluginExecutions>  
25.                         </lifecycleMappingMetadata>  
26.                     </configuration>  
27.                 </plugin>  
28.             </plugins>  
29.         </pluginManagement>  
30.         <plugins>  
31.             <plugin>  
32.                 <groupId>org.apache.maven.plugins</groupId>  
33.                 <artifactId>maven-dependency-plugin</artifactId>  
34.                 <executions>  
35.                     <execution>  
36.                         <id>copy-dependencies</id>  
37.                         <phase>package</phase>  
38.                         <goals>  
39.                             <goal>copy-dependencies</goal>  
40.                         </goals>  
41.                         <configuration>  
42.                             <outputDirectory>${project.build.directory}/lib</outputDirectory>  
43.                             <excludeTransitive>false</excludeTransitive>  
44.                             <stripVersion>true</stripVersion>  
45.                         </configuration>  
46.                     </execution>  
47.                 </executions>  
48.             </plugin>  
49.         </plugins>  
50.     </build>