我正在使用安装了 Maven 插件的 Maven 3.0.5 和 Spring Tool Source 3.2。当我尝试执行“运行方式---> Maven 安装”时，出现以下错误：
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-resources-plugin:2.5:resources (default-resources) on project mavencxf: Execution default-resources of goal org.apache.maven.plugins:maven-resources-plugin:2.5:resources failed: A required class was missing while executing org.apache.maven.plugins:maven-resources-plugin:2.5:resources: org/codehaus/plexus/util/Scanner
[ERROR] -----------------------------------------------------
[ERROR] realm = plugin>org.apache.maven.plugins:maven-resources-plugin:2.5
[ERROR] strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
[ERROR] urls[0] = file:/C:/Users/Mindbowser-MB/.m2/repository/org/apache/maven/plugins/maven-resources-plugin/2.5/maven-resources-plugin-2.5.jar
[ERROR] urls[1] = file:/C:/Users/Mindbowser-MB/.m2/repository/org/apache/maven/reporting/maven-reporting-api/2.0.6/maven-reporting-api-2.0.6.jar
[ERROR] urls[2] = file:/C:/Users/Mindbowser-MB/.m2/repository/org/apache/maven/doxia/doxia-sink-api/1.0-alpha-7/doxia-sink-api-1.0-alpha-7.jar
[ERROR] urls[3] = file:/C:/Users/Mindbowser-MB/.m2/repository/commons-cli/commons-cli/1.0/commons-cli-1.0.jar
[ERROR] urls[4] = file:/C:/Users/Mindbowser-MB/.m2/repository/org/codehaus/plexus/plexus-interactivity-api/1.0-alpha-4/plexus-interactivity-api-1.0-alpha-4.jar
[ERROR] urls[5] = file:/C:/Users/Mindbowser-MB/.m2/repository/junit/junit/3.8.1/junit-3.8.1.jar
[ERROR] urls[6] = file:/C:/Users/Mindbowser-MB/.m2/repository/org/codehaus/plexus/plexus-utils/2.0.5/plexus-utils-2.0.5.jar
[ERROR] urls[7] = file:/C:/Users/Mindbowser-MB/.m2/repository/org/apache/maven/shared/maven-filtering/1.0/maven-filtering-1.0.jar
[ERROR] …