Tomcat详细部署
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介绍
1.概念
Tomcat 服务器是一个开源的轻量级Web应用服务器，在中小型系统和并发量小的场合下被普遍使用，是开发和调试Servlet、JSP 程序的首选。
2.HTTP请求过程
Tomcat Server处理一个HTTP请求的过程
1、用户点击网页内容，请求被发送到本机端口8080，被在那里监听的Coyote HTTP/1.1 Connector获得。
2、Connector把该请求交给它所在的Service的Engine来处理，并等待Engine的回应。
3、Engine获得请求localhost/test/index.jsp，匹配所有的虚拟主机Host。
4、Engine匹配到名为localhost的Host（即使匹配不到也把请求交给该Host处理，因为该Host被定义为该Engine的默认主机），名为localhost的Host获得请求/test/index.jsp，匹配它所拥有的所有的Context。Host匹配到路径为/test的Context（如果匹配不到就把该请求交给路径名为“ ”的Context去处理）。
5、path=“/test”的Context获得请求/index.jsp，在它的mapping table中寻找出对应的Servlet。Context匹配到URL PATTERN为*.jsp的Servlet,对应于JspServlet类。
6、构造HttpServletRequest对象和HttpServletResponse对象，作为参数调用JspServlet的doGet（）或doPost（）.执行业务逻辑、数据存储等程序。
7、Context把执行完之后的HttpServletResponse对象返回给Host。
8、Host把HttpServletResponse对象返回给Engine。
9、Engine把HttpServletResponse对象返回Connector。
10、Connector把HttpServletResponse对象返回给客户Browser。
Tomcat部署
1.java环境安装
安装jdk环境
[[email protected] ~]# yum -y install java-1.8.0-openjdk java-1.8.0-openjdk-devel
查看安装的版本
[[email protected] ~]# java -version
openjdk version "1.8.0_181"
OpenJDK Runtime Environment (build 1.8.0_181-b13)
OpenJDK 64-Bit Server VM (build 25.181-b13, mixed mode)
tomcat部署
上官网下载tomcat
下载tomcat
[[email protected] ~]cd /usr/src
[[email protected] src]# wget https://archive.apache.org/dist/tomcat/tomcat-9/v9.0.8/bin/apache-tomcat-9.0.8.tar.gz
[[email protected] src]# ls
apache-tomcat-9.0.8.tar.gz debug kernels解压部署
[[email protected] src]# tar xf apache-tomcat-9.0.8.tar.gz -C /usr/local/
[[email protected] src]# cd /usr/local/
[[email protected] local]# ls
apache-tomcat-9.0.8 bin etc games include lib lib64 libexec nginx sbin share src
[[email protected] local]# ln -s apache-tomcat-9.0.8/ tomcat
[[email protected] local]# ll
total 0
drwxr-xr-x 9 root root 160 Sep 4 23:00 apache-tomcat-9.0.8
drwxr-xr-x. 2 root root 6 Nov 5 2016 bin
drwxr-xr-x. 2 root root 6 Nov 5 2016 etc
drwxr-xr-x. 2 root root 6 Nov 5 2016 games
drwxr-xr-x. 2 root root 6 Nov 5 2016 include
drwxr-xr-x. 2 root root 6 Nov 5 2016 lib
drwxr-xr-x. 2 root root 6 Nov 5 2016 lib64
drwxr-xr-x. 2 root root 6 Nov 5 2016 libexec
drwxr-xr-x. 11 root root 151 Sep 3 03:16 nginx
drwxr-xr-x. 2 root root 6 Nov 5 2016 sbin
drwxr-xr-x. 5 root root 49 Aug 30 04:37 share
drwxr-xr-x. 2 root root 6 Nov 5 2016 src
lrwxrwxrwx 1 root root 20 Sep 4 23:01 tomcat -> apache-tomcat-9.0.8/写一个hello world的java页面
[[email protected] ~]# cd /usr/local/tomcat/webapps/
[[email protected] webapps]# ls
docs examples host-manager manager ROOT
[[email protected] webapps]# mkdir test
[[email protected] webapps]# vim index.jsp
[[email protected] webapps]# ls
docs examples host-manager index.jsp manager ROOT test
[[email protected] webapps]# vim index.jsp
[[email protected] webapps]# rm -rf index.jsp
[[email protected] webapps]# rm -rf test/
[[email protected] webapps]# cd
[[email protected] ~]# cd /usr/local/tomcat/webapps/
[[email protected] webapps]# mkdir test
[[email protected] webapps]# cd test
[[email protected] test]# vim index.jsp
[[email protected] test]# cat index.jsp
<html>
<head>
<title>test page</title>
</head>
<body>
<%
out.println("Hellow World");
%>
</body>
</html>启动tomcat
[[email protected] test]# /usr/local/tomcat/bin/catalina.sh start
Using CATALINA_BASE: /usr/local/tomcat
Using CATALINA_HOME: /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME: /usr
Using CLASSPATH: /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar
Tomcat started.
[[email protected] test]# ss -natl
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 *:22 *:*
LISTEN 0 100 127.0.0.1:25 *:*
LISTEN 0 100 :::8080 :::*
LISTEN 0 128 :::22 :::*
LISTEN 0 100 ::1:25 :::*
LISTEN 0 1 ::ffff:127.0.0.1:8005 :::*
LISTEN 0 100 :::8009 :::*
[[email protected] test]# ps -ef |grep tomcat
root 2041 1 14 23:24 pts/1 00:00:03 /usr/bin/java -Djava.util.logging.config.file=/usr/local/tomcat/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -Dorg.apache.catalina.security.SecurityListener.UMASK=0027 -Dignore.endorsed.dirs= -classpath /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar -Dcatalina.base=/usr/local/tomcat -Dcatalina.home=/usr/local/tomcat -Djava.io.tmpdir=/usr/local/tomcat/temp org.apache.catalina.startup.Bootstrap start
root 2092 1905 0 23:25 pts/1 00:00:00 grep --color=auto tomcat
在浏览器上输入192.168.24.146:8080/test浏览网页
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