maven项目构建成功但是pom.xml文件提示错误解决

          最近工作过程中调试一个maven项目，调试后构建成功，但是pom.xml文件还是提示有错误，大体情况如下：

   鼠标点击parent展开的错误信息如下:

Execution default-resources of goal org.apache.maven.plugins:maven-resources-plugin:2.7:resources failed: Unable to load the mojo 'resources' (or one of its required components) from the plugin 'org.apache.maven.plugins:maven-resources-plugin:2.7' (org.apache.maven.plugins:maven-resources-plugin:2.7:resources:default-resources:process-resources)
org.apache.maven.plugin.PluginExecutionException: Execution default-resources of goal org.apache.maven.plugins:maven-resources-plugin:2.7:resources failed: Unable to load the mojo 'resources' (or one of its required components) from the plugin 'org.apache.maven.plugins:maven-resources-plugin:2.7'
	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:156)
	at org.eclipse.m2e.core.internal.embedder.MavenImpl.execute(MavenImpl.java:331)
	at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:244)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
Caused by: org.apache.maven.plugin.PluginContainerException: Unable to load the mojo 'resources' (or one of its required components) from the plugin 'org.apache.maven.plugins:maven-resources-plugin:2.7'
	at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getConfiguredMojo(DefaultMavenPluginManager.java:553)
	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:124)
	... 30 more
Caused by: org.codehaus.plexus.component.repository.exception.ComponentLookupException: java.util.NoSuchElementException
      role: org.apache.maven.plugin.Mojo
  roleHint: org.apache.maven.plugins:maven-resources-plugin:2.7:resources
	at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:267)
	at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:255)
	at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getConfiguredMojo(DefaultMavenPluginManager.java:519)
	... 31 more
Caused by: java.util.NoSuchElementException
	at org.eclipse.sisu.plexus.RealmFilteredBeans$FilteredItr.next(RealmFilteredBeans.java:118)
	at org.eclipse.sisu.plexus.RealmFilteredBeans$FilteredItr.next(RealmFilteredBeans.java:1)
	at org.eclipse.sisu.plexus.DefaultPlexusBeans$Itr.next(DefaultPlexusBeans.java:76)
	at org.eclipse.sisu.plexus.DefaultPlexusBeans$Itr.next(DefaultPlexusBeans.java:1)
	at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:263)
	... 33 more


Execution default-testResources of goal org.apache.maven.plugins:maven-resources-plugin:2.7:testResources failed: Unable to load the mojo 'testResources' (or one of its required components) from the plugin 'org.apache.maven.plugins:maven-resources-plugin:2.7' (org.apache.maven.plugins:maven-resources-plugin:2.7:testResources:default-testResources:process-test-resources)
org.apache.maven.plugin.PluginExecutionException: Execution default-testResources of goal org.apache.maven.plugins:maven-resources-plugin:2.7:testResources failed: Unable to load the mojo 'testResources' (or one of its required components) from the plugin 'org.apache.maven.plugins:maven-resources-plugin:2.7'
	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:156)
	at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:244)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
Caused by: org.apache.maven.plugin.PluginContainerException: Unable to load the mojo 'testResources' (or one of its required components) from the plugin 'org.apache.maven.plugins:maven-resources-plugin:2.7'
	at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getConfiguredMojo(DefaultMavenPluginManager.java:553)
	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:124)
	... 30 more
Caused by: org.codehaus.plexus.component.repository.exception.ComponentLookupException: java.util.NoSuchElementException
      role: org.apache.maven.plugin.Mojo
  roleHint: org.apache.maven.plugins:maven-resources-plugin:2.7:testResources
	at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:267)
	at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:255)
	at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getConfiguredMojo(DefaultMavenPluginManager.java:519)
	... 31 more
Caused by: java.util.NoSuchElementException
	at org.eclipse.sisu.plexus.RealmFilteredBeans$FilteredItr.next(RealmFilteredBeans.java:118)
	at org.eclipse.sisu.plexus.RealmFilteredBeans$FilteredItr.next(RealmFilteredBeans.java:1)
	at org.eclipse.sisu.plexus.DefaultPlexusBeans$Itr.next(DefaultPlexusBeans.java:76)
	at org.eclipse.sisu.plexus.DefaultPlexusBeans$Itr.next(DefaultPlexusBeans.java:1)
	at org.codehaus.plexus.DefaultPlexusContainer.lookup(DefaultPlexusContainer.java:263)
	... 33 more

这两个错误的原因是本工程依赖的包 在本地仓库中存在，曾经下载中超时或者未下载成功。
Maven不管下没下成功，都会有一个.lastupdate文件，一旦出现了这个文件，而你指定远程仓库的方式是mirror，而不是profile里的repository，那么Maven默认不会去更新这个文件。

解决方法两个步骤:

1.找到自己的本地仓库，(有关本地仓库详见:Maven本地仓库路径修改),默认的路径在本地用户的临时文件夹下面的 .m2 文件夹下的 repository 下,例如:C:\Users\admin\.m2\repository   把repository下的文件夹全部删除，或者只把相关报错的包的目录删除。刷新一下项目和clean一下。

2. MyEclipse -->  Preferences -->Maven4MyEclipse ---> User Settings 点击按钮 Update Settings 和 点击 Reindex按钮：

刷新项目，应该就没有报错信息了，如果还有，试试重启MyEclipse再刷新项目。

到这里基本就OK了。