[Maven] package 할 시 발생하는 'webxml attribute is required' 에러

프로젝트를 war 파일로 생성하기 위해 package 를 수행했는데 아래와 같은 오류가 발생을 했다.
1004lucifer

[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 23.703 s
[INFO] Finished at: 2017-06-22T18:33:18+09:00
[INFO] Final Memory: 49M/362M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.2:war (default-war) on project realestate-core: Error assembling WAR: webxml attribute is required (or pre-existing WEB-INF/web.xml if executing in update mode) -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.2:war (default-war) on project realestate-core: Error assembling WAR: webxml attribute is required (or pre-existing WEB-INF/web.xml if executing in update mode)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:212)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
at org.codehaus.classworlds.Launcher.main(Launcher.java:47)
Caused by: org.apache.maven.plugin.MojoExecutionException: Error assembling WAR: webxml attribute is required (or pre-existing WEB-INF/web.xml if executing in update mode)
at org.apache.maven.plugin.war.WarMojo.execute(WarMojo.java:193)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)
... 21 more
Caused by: org.codehaus.plexus.archiver.ArchiverException: webxml attribute is required (or pre-existing WEB-INF/web.xml if executing in update mode)
at org.codehaus.plexus.archiver.war.WarArchiver.initZipOutputStream(WarArchiver.java:148)
at org.codehaus.plexus.archiver.zip.AbstractZipArchiver.createArchiveMain(AbstractZipArchiver.java:309)
at org.codehaus.plexus.archiver.zip.AbstractZipArchiver.execute(AbstractZipArchiver.java:211)
at org.codehaus.plexus.archiver.AbstractArchiver.createArchive(AbstractArchiver.java:897)
at org.apache.maven.archiver.MavenArchiver.createArchive(MavenArchiver.java:582)
at org.apache.maven.plugin.war.WarMojo.performPackaging(WarMojo.java:243)
at org.apache.maven.plugin.war.WarMojo.execute(WarMojo.java:177)
... 23 more
[ERROR] 
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

아래와 같이 pom.xml 설정으로 해결이 가능하다.
1004lucifer

방법 1

<properties>
 <java.version>1.7</java.version>
 <tomcat.version>7.0.78</tomcat.version>
 <failOnMissingWebXml>false</failOnMissingWebXml>
 <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

방법 2

<build>
 <plugins>
  <plugin>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-maven-plugin</artifactId>
   <version>1.5.3.RELEASE</version>
  </plugin>
  <plugin>
   <groupId>org.apache.maven.plugins</groupId>
   <artifactId>maven-war-plugin</artifactId>
   <configuration>
    <failOnMissingWebXml>false</failOnMissingWebXml>
   </configuration>
  </plugin>
 </plugins>
</build>

참고
https://stackoverflow.com/questions/5351948/webxml-attribute-is-required-error-in-maven