[ERROR] Failed to execute goal org.apache.maven.plugins:maven-clean-plugin:2.5:clean (default-clean) on project study-search: Failed to clean project: Failed to delete D:Pxxtarget omcatlogsaccess_log.2017-3-24 [ERROR] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. [ERROR] Re-run Maven using the -X switch to enable full debug logging.
出现这种错误，通常是由于您已启动了另一个tomcat 进程或者运行的javaw.exe进程，导致报错。
解决方法：
1. 鼠标点击 X 进行关闭运行失败的 Console页，（如果运行多次，程序的console都只会放在这里）
关闭后，应该可以看到，红色小正方形。点击，使tomcat进程或运行的javaw.exe进程停止。
再重新编译即可。