webxml attribute is required (or pre-existing WEB-INF/web.xml if executing in update mode)

"webxml attribute is required (or pre-existing WEB-INF/web.xml if executing in update mode)"这个错误是在打包Maven项目时出现的。它表示在构建WAR文件时需要一个web.xml文件，如果执行模式为更新模式，则需要预先存在WEB-INF/web.xml文件。
解决这个问题的方法是在pom.xml文件中添加以下配置：

<build>
  <plugins>
    <plugin>
      <groupId>org.apache.maven.plugins</groupId>
      <artifactId>maven-war-plugin</artifactId>
      <version>2.2</version>
      <configuration>
        <failOnMissingWebXml>false</failOnMissingWebXml>
      </configuration>
    </plugin>
  </plugins>
</build>

这样配置之后，如果没有web.xml文件，打包过程将不会失败，而是继续执行。这样就解决了"webxml attribute is required"的错误。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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