问题：
Failed to execute goal org.apache.maven.plugins:maven-war-plugin::war (default-war) on project change-interface: Execution default-war of goal org.apache.maven.plugins:maven-war-plugin::war failed: basedir C:\gw\workspace\ieng\src\main\webapp does not exist
解决方案:
1.增加对应目录
2.创建web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
</web-app>
