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

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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<build>  

        <pluginManagement>  

            <plugins>  

                <plugin>  

                    <groupId>org.eclipse.m2e</groupId>  

                    <artifactId>lifecycle-mapping</artifactId>  

                    <version>1.0.0</version>  

                    <configuration>  

                        <lifecycleMappingMetadata>  

                            <pluginExecutions>  

                                <pluginExecution>  

                                    <pluginExecutionFilter>  

                                        <groupId>org.apache.maven.plugins</groupId>  

                                        <artifactId>maven-dependency-plugin</artifactId>  

                                        <versionRange>[2.0,)</versionRange>  

                                        <goals>  

                                            <goal>copy-dependencies</goal>  

                                        </goals>  

                                    </pluginExecutionFilter>  

                                    <action>  

                                        <ignore />  

                                    </action>  

                                </pluginExecution>  

                            </pluginExecutions>  

                        </lifecycleMappingMetadata>  

                    </configuration>  

                </plugin>  

            </plugins>  

        </pluginManagement>  

        <plugins>  

            <plugin>  

                <groupId>org.apache.maven.plugins</groupId>  

                <artifactId>maven-dependency-plugin</artifactId>  

                <executions>  

                    <execution>  

                        <id>copy-dependencies</id>  

                        <phase>package</phase>  

                        <goals>  

                            <goal>copy-dependencies</goal>  

                        </goals>  

                        <configuration>  

                            <outputDirectory>${project.build.directory}/lib</outputDirectory>  

                            <excludeTransitive>false</excludeTransitive>  

                            <stripVersion>true</stripVersion>  

                        </configuration>  

                    </execution>  

                </executions>  

            </plugin>  

        </plugins>  

    </build>