tomcat学习笔记

tomcat原始server.xml配置文件如下（删除注释）：

<?xml version='1.0' encoding='utf-8'?>

<Server port="8005" shutdown="SHUTDOWN">
  <Listener className="org.apache.catalina.startup.VersionLoggerListener" />
  
  <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" />
  <Listener className="org.apache.catalina.core.JasperListener" />
  <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />
  <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
  <Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" />

 
  <GlobalNamingResources>
   
    <Resource name="UserDatabase" auth="Container"
              type="org.apache.catalina.UserDatabase"
              description="User database that can be updated and saved"
              factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
              pathname="conf/tomcat-users.xml" />
  </GlobalNamingResources>

  
  <Service name="Catalina">

    <Connector port="8080" 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 &quot;%r&quot; %s %b" />

      </Host>
       
    </Engine>
  </Service>
</Server>

简单说明：配置文件中server组件只能有一个，service可以有多个，每个service里面有多个connector（连接器）和一个Engine容器，连接器监听端口，接收请求后生成request和response对象并将请求交给Engine容器处理，Engine有一个默认虚拟主机对应host容器（该容器在配置文件中必须声明），Engine根据域名找到对应的host，host容器会根据请求路径找到对应的context容器（稍后说明）。比如说请求地址为 http://localhost:8080/webapp1连接器监听的8080端口有请求，Engine将请求送到name=localhost的host容器，host容器再根据/webapp1找到具体的web项目。

tomcat部署方式（详情可自行百度）

自动部署：~

手动部署：显示的在server.xml里面配置context容器

同一个tomcat下部署多个web项目的几种方式

1、配置多个service实现“同一域名不同端口号”访问不同web项目

2、配置多个host实现“不同域名同一端口号”访问不同web项目，server.xml文件如下

<?xml version='1.0' encoding='utf-8'?>

<Server port="8005" shutdown="SHUTDOWN">
  <Listener className="org.apache.catalina.startup.VersionLoggerListener" />
  
  <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" />
  <Listener className="org.apache.catalina.core.JasperListener" />
  <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />
  <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
  <Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" />

 
  <GlobalNamingResources>
   
    <Resource name="UserDatabase" auth="Container"
              type="org.apache.catalina.UserDatabase"
              description="User database that can be updated and saved"
              factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
              pathname="conf/tomcat-users.xml" />
  </GlobalNamingResources>

  
  <Service name="Catalina">

    <Connector port="8080" 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 &quot;%r&quot; %s %b" />

      </Host>
      
       <Host name="www.test1.com"  appBase="webapps"
            unpackWARs="true" autoDeploy="true">

        <Context path ="" docBase ="/test1" debug ="0" reloadbale ="true" ></Context>

      </Host>
      
      <Host name="www.test2.com"  appBase="webapps"
            unpackWARs="true" autoDeploy="true">

        <Context path ="" docBase ="/test2" debug ="0" reloadbale ="true" ></Context>

      </Host>
    </Engine>
  </Service>
</Server>

可以通过 www.test1.com:8080访 “tomcat根目录/webapps”下的test1项目。通过 www.test2.com:8080访 “tomcat根目录/webapps”下的test2项目。

简单说明：context容易中，path表示访问项目的路径，这里为空，若不为空如path ="test"，那么需要在浏览器中输入www.test1.com:8080/test才能访问项目；docbase表示项目实际存放位置。

注意：自行修改hosts文件实验，http默认端口号是80，若想要直接通过www.test1.com域名访问test1项目，只需server.xml添加如下

<Connector port="80" protocol="HTTP/1.1"
                connectionTimeout="20000"
               redirectPort="8443" />

3、配置多个context实现“同一域名同一端口号不同项目路径”访问不同web项目。