mac tomcat启动后，打开主页为空白页，求各位帮助，下面是控制台信息。。。

Question

Using CLASSPATH: /usr/local/apache-tomcat-8.5.9/bin/bootstrap.jar:/usr/local/apache-tomcat-8.5.9/bin/tomcat-juli.jar
18-Dec-2016 09:22:01.278 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Server version: Apache Tomcat/8.5.9
18-Dec-2016 09:22:01.283 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Server built: Dec 5 2016 20:18:12 UTC
18-Dec-2016 09:22:01.284 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Server number: 8.5.9.0
18-Dec-2016 09:22:01.284 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log OS Name: Mac OS X
18-Dec-2016 09:22:01.284 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log OS Version: 10.12.2
18-Dec-2016 09:22:01.284 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Architecture: x86_64
18-Dec-2016 09:22:01.284 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Java Home: /Library/Java/JavaVirtualMachines/jdk1.8.0_112.jdk/Contents/Home/jre
18-Dec-2016 09:22:01.284 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log JVM Version: 1.8.0_112-b16
18-Dec-2016 09:22:01.285 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log JVM Vendor: Oracle Corporation
18-Dec-2016 09:22:01.285 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_BASE: /usr/local/apache-tomcat-8.5.9
18-Dec-2016 09:22:01.285 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_HOME: /usr/local/apache-tomcat-8.5.9
18-Dec-2016 09:22:01.286 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.config.file=/usr/local/apache-tomcat-8.5.9/conf/logging.properties
18-Dec-2016 09:22:01.286 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
18-Dec-2016 09:22:01.286 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djdk.tls.ephemeralDHKeySize=2048
18-Dec-2016 09:22:01.287 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.protocol.handler.pkgs=org.apache.catalina.webresources
18-Dec-2016 09:22:01.287 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.base=/usr/local/apache-tomcat-8.5.9
18-Dec-2016 09:22:01.287 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.home=/usr/local/apache-tomcat-8.5.9
18-Dec-2016 09:22:01.287 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.io.tmpdir=/usr/local/apache-tomcat-8.5.9/temp
18-Dec-2016 09:22:01.288 信息 [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: /Users/user/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:.
18-Dec-2016 09:22:01.445 信息 [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["http-nio-8080"]
18-Dec-2016 09:22:01.480 严重 [main] org.apache.coyote.AbstractProtocol.init Failed to initialize end point associated with ProtocolHandler ["http-nio-8080"]
java.net.BindException: Address already in use
at sun.nio.ch.Net.bind0(Native Method)
at sun.nio.ch.Net.bind(Net.java:433)
at sun.nio.ch.Net.bind(Net.java:425)
at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223)

Answer 1

Address already in use，说明你mac的8080端口被别的进程占用了，导致tomcat启动不了。
netstat -anp|grep 8080 看看是哪个程序占用了8080端口，然后kill掉那个进程，再启动tomcat