Jenkins启动时报错:java.net.BindException: Address already in use: bind 解决方法

下载jenkins.war包后，进入Jenkins.war包目录下，运行java -jar jenkins.war时报端口被占用的错误:java.net.BindException: Address already in use: bind,具体如：

[33m2014-11-18 9:53:11 org.eclipse.jetty.util.log.JavaUtilLog warn
警告: FAILED SelectChannelConnector@0.0.0.0:8080: java.net.BindException: Address already in use: bind
java.net.BindException: Address already in use: bind
　　at sun.nio.ch.Net.bind(Native Method)
　　at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:124)
　　at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:59)
　　at org.eclipse.jetty.server.nio.SelectChannelConnector.open(SelectChannelConnector.java:187)
　　at org.eclipse.jetty.server.AbstractConnector.doStart(AbstractConnector.java:316)
　　at org.eclipse.jetty.server.nio.SelectChannelConnector.doStart(SelectChannelConnector.java:265)
　　at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)
　　at org.eclipse.jetty.server.Server.doStart(Server.java:293)
　　at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)
　　at winstone.Launcher.<init>(Launcher.java:154)
　　at winstone.Launcher.main(Launcher.java:354)
　　at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
　　at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
　　at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
　　at java.lang.reflect.Method.invoke(Method.java:597)
　　at Main._main(Main.java:293)
　　at Main.main(Main.java:98)
　　[33m2014-11-18 9:53:11 org.eclipse.jetty.util.log.JavaUtilLog warn
警告: FAILED org.eclipse.jetty.server.Server@117f31e: java.net.BindException: Address already in use: bind
java.net.BindException: Address already in use: bind
　　at sun.nio.ch.Net.bind(Native Method)
　　at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:124)
　　at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:59)
　　at org.eclipse.jetty.server.nio.SelectChannelConnector.open(SelectChannelConnector.java:187)
　　at org.eclipse.jetty.server.AbstractConnector.doStart(AbstractConnector.java:316)
　　at org.eclipse.jetty.server.nio.SelectChannelConnector.doStart(SelectChannelConnector.java:265)
　　at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)
　　at org.eclipse.jetty.server.Server.doStart(Server.java:293)
　　at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:64)
　　at winstone.Launcher.<init>(Launcher.java:154)
　　at winstone.Launcher.main(Launcher.java:354)
　　at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
　　at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
　　at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
　　at java.lang.reflect.Method.invoke(Method.java:597)
　　at Main._main(Main.java:293)
　　at Main.main(Main.java:98)
[0m2014-11-18 9:53:11 org.eclipse.jetty.util.log.JavaUtilLog info
信息: stopped w.{,file:/C:/Users/Administrator/.jenkins/war/},C:\Users\Administrator\.jenkins\war

解决方法：修改Jenkins端口java -jar jenkins.war --httpPort=8081