[Feature][style] Test Spotless plugin for style / formatting errors f…

…ix (apache#10963)

pom.xml

@@ -16,7 +16,7 @@
   ~ limitations under the License.
   -->
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <groupId>org.apache.dolphinscheduler</groupId>
     <artifactId>dolphinscheduler</artifactId>
@@ -102,6 +102,7 @@
         <maven-dependency-plugin.version>3.1.1</maven-dependency-plugin.version>
         <maven-shade-plugin.version>3.2.1</maven-shade-plugin.version>
         <rpm-maven-plugion.version>2.2.0</rpm-maven-plugion.version>
+        <spotless.version>2.23.0</spotless.version>
         <jacoco.version>0.8.7</jacoco.version>
         <jcip.version>1.0</jcip.version>
         <maven.deploy.skip>false</maven.deploy.skip>
@@ -1163,6 +1164,69 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>com.diffplug.spotless</groupId>
+                <artifactId>spotless-maven-plugin</artifactId>
+                <version>${spotless.version}</version>
+                <configuration>
+                    <!-- optional: limit format enforcement to just the files changed by this feature branch -->
+                    <!--                    <ratchetFrom>upstream/dev</ratchetFrom>-->
+                    <formats>
+                        <!-- you can define as many formats as you want, each is independent -->
+                        <format>
+                            <!-- define the files to apply to -->
+                            <includes>
+                                <include>*.md</include>
+                                <include>.gitignore</include>
+                            </includes>
+                            <!-- define the steps to apply to those files -->
+                            <trimTrailingWhitespace/>
+                            <endWithNewline/>
+                            <indent>
+                                <tabs>true</tabs>
+                                <spacesPerTab>4</spacesPerTab>
+                            </indent>
+                        </format>
+                    </formats>
+                    <!-- define a language-specific format -->
+                    <java>
+                        <!-- no need to specify files, inferred automatically, but you can if you want -->
+
+                        <importOrder /> <!-- standard import order -->
+
+                        <removeUnusedImports /> <!-- self-explanatory -->
+
+                        <!-- apply a specific flavor of google-java-format and reflow long strings -->
+                        <googleJavaFormat>
+                            <version>1.8</version>
+                            <style>AOSP</style>
+                            <reflowLongStrings>true</reflowLongStrings>
+                        </googleJavaFormat>
+
+                        <!-- make sure every file has the following copyright header.
+                          optionally, Spotless can set copyright years by digging
+                          through git history (see "license" section below) -->
+                        <licenseHeader>
+                            <content>/*
+                                * 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.
+                                */</content>  <!-- or <file>${project.basedir}/license-header</file> -->
+                        </licenseHeader>
+                    </java>
+                </configuration>
+            </plugin>
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>cobertura-maven-plugin</artifactId>