一个maven错误:org/apache/maven/shared/filtering/MavenFilteringException

电脑重启后不知道为啥eclipse中的maven不能用了，pom文件一直标红，报以下错误：

Execution default-cli of goal org.apache.maven.plugins:maven-resources-plugin:2.5:copy-resources failed: A required class was missing while executing org.apache.maven.plugins:maven-resources-plugin:2.5:copy-resources: org/apache/maven/shared/filtering/MavenFilteringException

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realm =    plugin>org.apache.maven.plugins:maven-resources-plugin:2.5
strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
urls[0] = file:/C:/Users/admin/.m2/repository/org/apache/maven/plugins/maven-resources-plugin/2.5/maven-resources-plugin-2.5.jar
urls[1] = file:/C:/Users/admin/.m2/repository/org/codehaus/plexus/plexus-utils/1.1/plexus-utils-1.1.jar
Number of foreign imports: 1

import: Entry[import  from realm ClassRealm[maven.api, parent: null]]

但是在.m2下maven插件：maven-resources-plugin的确是存在的，而且版本号的确是2.5

解决办法，在pom文件中增加：

   
         
   org.apache.maven.plugins  
   maven-resources-plugin  
   2.4.3  
     
       utf-8  
     
 
   

具体原因以后再查。