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