Maven packaged WEB Project error error assembling War:webxml attribute is required (or pre-existing web-inf/web.xml if

Maven install Web project times wrong:

[ERROR] Failed to execute goal Org.apache.maven.plugins:maven-war-plugin:2.2:war (Default-war) on Project Spring2:error Assembling War:webxml attribute is required (or pre-existing web-inf/web.xml if executing in update mode), [Help 1]

Cause Analysis:
The default webroot for MAVEN Web projects is at Src\main\webapp. If the Web. XML is not found in this directory, the above exception is thrown.

Workaround: Modify Webroot to WebApp Specify Web. XML in Pom.xml as follows:

<build>
    <finalName>web-app-name</finalName>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactid>maven-war-plugin</artifactid >
            <version>2.2</version>
            <configuration>
                <webxml>webcontent\web-inf\ web.xml</webxml>
            </configuration>
        </plugin>
    </plugins>
</build >