当导入个maven项目时，提示出现以下错误：
Project build error: Unresolveable build extension: Plugin org.sonatype.plugins:nexus-staging-maven-plugin:1.6.3 or one of its dependencies
could not be resolved: The following artifacts could not be resolved: com.google.guava:guava:jar:14.0.1, org.sonatype.nexus:nexus-client-
core:jar:2.7.2-01, org.sonatype.nexus.plugins:nexus-restlet1x-model:jar:2.7.2-01, org.apache.maven:maven-model:jar:3.0.4, org.slf4j:slf4j-api:jar:...........
或无法读取相关jar包
此刻需要重新加载一下，加载依赖jar包
1.选中这个项目 运行project---->clean
2.选中这个项目 运行Debug AS----->maven clean
3.加载pom里的jar，Debug AS----->maven INSTALL
或者尝试选中项目，maven>update project>勾选 force update。。。