tomcat发布应用，及JVM配置
一、tomcat 发布多个应用1. 同一端口下发布多个应用，如果需要不带端口，可以设置端口为80，多个host的name一定不能相同
<Service name="Catalina">
<Connector port="80" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" />
<Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
<Engine name="Catalina" defaultHost="localhost">
<Realm className="org.apache.catalina.realm.LockOutRealm">
<Realm className="org.apache.catalina.realm.UserDatabaseRealm"
resourceName="UserDatabase"/>
</Realm>
<Host name="localhost"appBase="webapps"
unpackWARs="true" autoDeploy="true">
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
prefix="localhost_access_log." suffix=".txt"
pattern="%h %l %u %t "%r" %s %b" />
<Context docBase="tbp" path="" debug="0" reloadable="true" />
</Host>
<Host name="127.0.0.1"appBase="webapps"
unpackWARs="true" autoDeploy="true">
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
prefix="localhost_access_log." suffix=".txt"
pattern="%h %l %u %t "%r" %s %b" />
<Context docBase="tbp2" path="" debug="0" reloadable="true" />
</Host>
</Engine>
</Service>
如果应用访问需要加上context：
<Service name="Catalina">
<Connector port="80" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" />
<Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
<Engine name="Catalina" defaultHost="localhost">
<Realm className="org.apache.catalina.realm.LockOutRealm">
<Realm className="org.apache.catalina.realm.UserDatabaseRealm"
resourceName="UserDatabase"/>
</Realm>
<Host name="localhost"appBase="webapps"
unpackWARs="true" autoDeploy="true">
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
prefix="localhost_access_log." suffix=".txt"
pattern="%h %l %u %t "%r" %s %b" />
<Context docBase="tbp" path="/tbp" debug="0" reloadable="true" />
</Host>
<Host name="127.0.0.1"appBase="webapps"
unpackWARs="true" autoDeploy="true">
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
prefix="localhost_access_log." suffix=".txt"
pattern="%h %l %u %t "%r" %s %b" />
<Context docBase="tbp2" path="/tbp2" debug="0" reloadable="true" />
</Host>
</Engine>
</Service>
2. 如果不同的应用需要对应不同的端口，可以将多个应用分别放到多个tomcat下，也可以在server.xml中进行配置
<Service name="tbp">
<Connector port="2080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" />
<Connector port="2009" protocol="AJP/1.3" redirectPort="8443" />
<Engine name="tbp" defaultHost="localhost">
<Realm className="org.apache.catalina.realm.LockOutRealm">
<Realm className="org.apache.catalina.realm.UserDatabaseRealm"
resourceName="UserDatabase"/>
</Realm>
<Host name="localhost"appBase="webapps"
unpackWARs="true" autoDeploy="true">
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
prefix="localhost_access_log." suffix=".txt"
pattern="%h %l %u %t "%r" %s %b" />
<Context docBase="tbp" path="" debug="0" reloadable="true" />
</Host>
</Engine>
</Service>
<Service name="tbp2">
<Connector port="3080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" />
<Connector port="3009" protocol="AJP/1.3" redirectPort="8443" />
<Engine name="tbp2" defaultHost="localhost">
<Realm className="org.apache.catalina.realm.LockOutRealm">
<Realm className="org.apache.catalina.realm.UserDatabaseRealm"
resourceName="UserDatabase"/>
</Realm>
<Host name="localhost"appBase="webapps"
unpackWARs="true" autoDeploy="true">
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
prefix="localhost_access_log." suffix=".txt"
pattern="%h %l %u %t "%r" %s %b" />
<Context docBase="tbp2" path="" debug="0" reloadable="true" />
</Host>
</Engine>
</Service>
但如果配置多个应用，可能会出现内存溢出的错误，这时需要调整Catalina.bat中设置的JVM大小：
在rem ----- Execute The Requested Command ---------------------------------------后调整
Linux下修改JVM内存大小:
要添加在tomcat 的bin 下catalina.sh 里，位置cygwin=false前 。注意引号要带上,红色的为新添加的.
# OS specific support. $var _must_ be set to either true or false.
JAVA_OPTS="-Xms256m -Xmx512m -Xss1024K -XX:PermSize=128m -XX:MaxPermSize=256m"
cygwin=false
windows下修改JVM内存大小:
情况一:解压版本的Tomcat, 要通过startup.bat启动tomcat才能加载配置
要添加在tomcat 的bin 下catalina.bat 里
rem Guess CATALINA_HOME if not defined
set CURRENT_DIR=%cd%后面添加,红色的为新添加的.
set JAVA_OPTS=-Xms256m -Xmx512m -XX:PermSize=128M -XX:MaxNewSize=256m -XX:MaxPermSize=256m -Djava.awt.headless=true
具体大小，可以根据实际情况调整。
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