Eclipse创建maven项目时，出现Could not calculate build plan: Plugin org.apache.maven.plugins:maven-resources错

在用Eclipse创建maven项目时，出现Could not calculate build plan: Failure to transfer org.apache.maven.plugins:maven-surefire-plugin:pom:2.7.1 from http://repo1.maven.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced. Original error: Could not transfer artifact org.apache.maven.plugins:maven-surefire-plugin:pom:2.7.1 from/to central (http://repo1.maven.org/maven2): Access denied to http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-surefire-plugin/2.7.1/maven-surefire-plugin-2.7.1.pom. Error code 407, Proxy Authentication Required ( The ISA Server requires authorization to fulfill the request. Access to the Web Proxy service is denied.  ) log4j-test01 Unknown Maven Problem错误

主要原因是maven本地仓库出现了问题，解决办法如下：

1.打开Eclipse→Window→Preferences，然后在Preferences窗口中找到Maven→UserSettings找到.m2文件的安装目录，

然后将.m2/repository/org/apache/maven/plugins目录下的文件夹全部删除，选中maven项目，右键--》maven--》update让maven重新下载依赖包

2.如果自己重新设置了maven本地仓库，则选择Global Settings安装目录。我的安装位置是D:\apache-maven-3.3.9\conf\settings.xml，找到setting.xml文件，找到自己设置的maven本地仓库的位置，我的为D:/jingtaodb/mvn_repo。然后将mvn_repo文件删掉，重新导入

3.选中maven项目，右键--》maven--》update让maven重新下载依赖包