Failed to execute goal org.apache.maven.plugins:maven

Failed to execute goal org.apache.maven.plugins:maven

错误信息：Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.2:war (default-war) on project Thesis: Error assembling WAR: webxml attribute is required (or pre-existing l if executing in update mode) 

错误说明：

在创建maven项目的时候，可能出现上诉错误，错误的原因是maven项目默认的l是放在webapp/WEB-INF下的，当l的路径改变了，那么系统就无法识别了，此时需要在l中通过maven-war-plugin指明l的存放路径。如下：

<!-- 修改webapp目录为WebContent -->
<plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-war-plugin</artifactId><configuration><!-- 设置WebContent目录为Web目录 --><webappDirectory>WebContent</webappDirectory><warSourceDirectory>WebContent</warSourceDirectory></configuration>
</plugin>