Address already in use: JVM_Bind :8080

java.net.BindException: Address already in use: JVM_Bind <null>:8080
	at org.apache.tomcat.util.net.JIoEndpoint.bind(JIoEndpoint.java:411)
	at org.apache.tomcat.util.net.AbstractEndpoint.init(AbstractEndpoint.java:646)
	at org.apache.coyote.AbstractProtocol.init(AbstractProtocol.java:434)
	at org.apache.coyote.http11.AbstractHttp11JsseProtocol.init(AbstractHttp11JsseProtocol.java:119)
	at org.apache.catalina.connector.Connector.initInternal(Connector.java:978)
	at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
	at org.apache.catalina.core.StandardService.initInternal(StandardService.java:559)
	at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
	at org.apache.catalina.core.StandardServer.initInternal(StandardServer.java:821)
	at org.apache.catalina.util.LifecycleBase.init(LifecycleBase.java:102)
	at org.apache.catalina.startup.Catalina.load(Catalina.java:638)
	at org.apache.catalina.startup.Catalina.load(Catalina.java:663)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.apache.catalina.startup.Bootstrap.load(Bootstrap.java:280)
	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:454)
Caused by: java.net.BindException: Address already in use: JVM_Bind
	at java.net.DualStackPlainSocketImpl.bind0(Native Method)
	at java.net.DualStackPlainSocketImpl.socketBind(DualStackPlainSocketImpl.java:106)
	at java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:376)
	at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:190)
	at java.net.ServerSocket.bind(ServerSocket.java:376)
	at java.net.ServerSocket.<init>(ServerSocket.java:237)
	at java.net.ServerSocket.<init>(ServerSocket.java:181)
	at org.apache.tomcat.util.net.DefaultServerSocketFactory.createSocket(DefaultServerSocketFactory.java:49)
	at org.apache.tomcat.util.net.JIoEndpoint.bind(JIoEndpoint.java:398)
	... 17 more

這個異常在Tomcat啓動的時候會碰到這個異常，原因是因爲8080的端口號被其他程序佔用了，或者開啓了同一個程序兩次。

解決方案：

1. 查找哪個程序佔用了該端口，關閉它.通過一個dos命令  netstat -a -b來查看佔用端口的exe程序

2. 修改Tomcat的端口號

3.  關閉其他途徑打開的程序。