pom报错处理

报错：Could not initialize class org.apache.maven.plugin.war.util.WebappStructureSerializer
或
Cannot access defaults field of Properties
解决：

	                <plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-war-plugin</artifactId>
				<version>3.3.1</version>
			</plugin>

报错：cvc-elt.1.a: Cannot find the declaration of element 'project'.
解决： xsi:schemaLocation="http 改为https

报错 ：Multiple markers at this line - Content is not allowed in prolog. - Cannot access defaults field of Properties
解决： 从一个正常的xml文件中，把头信息复制到出问题的xml中

<?xml version="1.0" encoding="UTF-8"?>