IDEA中启动Tomcat报错,Error running Tomcat7.0.52: Address localhost:1099 is already in use 或者是 java.rmi.server.ExportException: Port already in use: 1099 ,表示1099端口被其他进程占用了. 解决方法: 1. win+R,运行,输入cmd,进入命令提示符 2. 输入netstat -aon | findstr 1099,找到占用1099端口的进程ID:PI