有时候运行程序总会报如下错误：
Several ports (
8080,
8009) required
by Tomcat v7
.0 Server
at localhost are already
in use. The server may already be running
in another
process,
or a system process may be
using the port. To start this server you will need
to stop
the other
process or change
the port
number(s).
解决方法：
一、查看站用端口号的进程号
命令：lsof -i :<端口号> 例如：
root
$ lsof -i
:8080
COMMAND PID USER FD TYPE DEVICE SIZE/
OFF NODE NAME
java
48168 root
54u
IPv6 0x2a670557f4dd04dd 0t
0 TCP *
:http-alt (
LISTEN)
二、杀死站用指定端口号的进程
命令：kill -9 <进程ID> 例如：kill -9 48168
三、重新运行tomcat或者项目
