Если указать в pom.xml packing=war, то необходимо добавить maven-war-plugin и указать в нем путь к web.xml:
<?xml version="1.0" encoding="UTF-8"?> <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"> <modelVersion>4.0.0</modelVersion> <groupId>ru.abc</groupId> <artifactId>testProject</artifactId> <version>1.0-SNAPSHOT</version> <packaging>war</packaging> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-war-plugin</artifactId> <configuration> <webXml>WEB-INF\web.xml</webXml> </configuration> </plugin> </plugins> </build> </project>