tomcat学习笔记

Posted 2020-10-06 OUYM

tomcat原始server.xml配置文件如下（删除注释）：

 1 <?xml version=‘1.0‘ encoding=‘utf-8‘?>
 2 
 3 <Server port="8005" shutdown="SHUTDOWN">
 4   <Listener className="org.apache.catalina.startup.VersionLoggerListener" />
 5   
 6   <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" />
 7   <Listener className="org.apache.catalina.core.JasperListener" />
 8   <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />
 9   <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
10   <Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" />
11 
12  
13   <GlobalNamingResources>
14    
15     <Resource name="UserDatabase" auth="Container"
16               type="org.apache.catalina.UserDatabase"
17               description="User database that can be updated and saved"
18               factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
19               pathname="conf/tomcat-users.xml" />
20   </GlobalNamingResources>
21 
22   
23   <Service name="Catalina">
24 
25     <Connector port="8080" protocol="HTTP/1.1"
26                connectionTimeout="20000"
27                redirectPort="8443" />
28     
29     <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
30 
31     <Engine name="Catalina" defaultHost="localhost">
32 
33       <Realm className="org.apache.catalina.realm.LockOutRealm">
34         <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
35                resourceName="UserDatabase"/>
36       </Realm>
37 
38       <Host name="localhost"  appBase="webapps"
39             unpackWARs="true" autoDeploy="true">
40 
41         <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
42                prefix="localhost_access_log." suffix=".txt"
43                pattern="%h %l %u %t &quot;%r&quot; %s %b" />
44 
45       </Host>
46        
47     </Engine>
48   </Service>
49 </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

 1 <?xml version=‘1.0‘ encoding=‘utf-8‘?>
 2 
 3 <Server port="8005" shutdown="SHUTDOWN">
 4   <Listener className="org.apache.catalina.startup.VersionLoggerListener" />
 5   
 6   <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" />
 7   <Listener className="org.apache.catalina.core.JasperListener" />
 8   <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />
 9   <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
10   <Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" />
11 
12  
13   <GlobalNamingResources>
14    
15     <Resource name="UserDatabase" auth="Container"
16               type="org.apache.catalina.UserDatabase"
17               description="User database that can be updated and saved"
18               factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
19               pathname="conf/tomcat-users.xml" />
20   </GlobalNamingResources>
21 
22   
23   <Service name="Catalina">
24 
25     <Connector port="8080" protocol="HTTP/1.1"
26                connectionTimeout="20000"
27                redirectPort="8443" />
28     
29     <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
30 
31     <Engine name="Catalina" defaultHost="localhost">
32 
33       <Realm className="org.apache.catalina.realm.LockOutRealm">
34         <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
35                resourceName="UserDatabase"/>
36       </Realm>
37 
38       <Host name="localhost"  appBase="webapps"
39             unpackWARs="true" autoDeploy="true">
40         <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
41                prefix="localhost_access_log." suffix=".txt"
42                pattern="%h %l %u %t &quot;%r&quot; %s %b" />
43 
44       </Host>
45       
46        <Host name="www.test1.com"  appBase="webapps"
47             unpackWARs="true" autoDeploy="true">
48 
49         <Context path ="" docBase ="/test1" debug ="0" reloadbale ="true" ></Context>
50 
51       </Host>
52       
53       <Host name="www.test2.com"  appBase="webapps"
54             unpackWARs="true" autoDeploy="true">
55 
56         <Context path ="" docBase ="/test2" debug ="0" reloadbale ="true" ></Context>
57 
58       </Host>
59     </Engine>
60   </Service>
61 </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。