MAVEN - 如果没有License头会报错（apache-rat-plugin）：Too many files with unapproved license: 6 See RAT report

错误描述

Failed to execute goal org.apache.rat:apache-rat-plugin:0.13:check (rat-check) on project atlas-webapp: 
Too many files with unapproved license: 6 See RAT report

错误原因

由于添加了apache-rat-plugin插件，所以项目中新添加的文件如果没有加上License头，会在检查时报错。

解决方案

方案一

在每个新添加的文件中，加上License头。

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

方案二

文件打包时跳过检查，添加： -Drat.skip=true

mvn clean package -Drat.skip=true -DskipTests -Denforcer.skip=true -Pdist,embedded-hbase-solr

方案三

将项目中的插件：apache-rat-plugin 去掉