eclipse启动tomcat报错'Start Tomcat v8.0 Server at localhost' has encountered a problem.

错误：Start Tomcat v8.0 Server at localhost' has encountered a problem.Port 8080 required by Tomcat v8.0 Server at localhost is 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).

分析：eclipse启动tomcat是出现以下错误。根据具体描述Port 8080 required by Tomcat v8.0 Server at localhost is already in use.可以知道，是8080端口被占用。

解决方案一：

1.进入DOS模式，使用 netstat -neo 查看端口使用情况。

可以看出8080端口被 PID号为90796的程序占用。

2.进入任务管理器再详细信息中找到PID为90796的程序。可见程序为javaw.exe.

3.结束该运行程序。OK。 

解决方案二：

进入tomcat的配置文件。

将8080端口修改为没有被占用的端口号即可。