IDEA用maven打成war文件的时候提示报错：Cannot access defaults field of Properties，或者是：pre-existing WEB-INF/web.xml

问题描述

   mvn compile 正常，但是 mvn package 或者 mvn install 打 war 包时都会报错；

报错异常

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.2:war (default-war) on project maven_02_ssm: Execution default-war of goal org.apache.maven.plugins:maven-war-plugin:2.2:war failed: Unable to load the mojo ‘war’ in the plugin ‘org.apache.maven.plugins:maven-war-plugin:2.2’ due to an API incompatibility: org.codehaus.plexus.component.repository.exception.ComponentLookupException: Cannot access defaults field of Properties

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

解决办法

       解决办法是要在pom.xml文件下添加以下插件，才可以打包war包

打包jar包不添加也是没有问题的

<build>
    <plugins>
        <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                &l