tomcat
一、简介
Tomcat 服务器是一个免费的开放源代码的Web 应用服务器,属于轻量级应用服务器,在中小型系统和并发访问用户不是很多的场合下被普遍使用,是开发和调试JSP 程序的首选。对于一个初学者来说,可以这样认为,当在一台机器上配置好Apache 服务器,可利用它响应HTML(标准通用标记语言下的一个应用)页面的访问请求。实际上Tomcat是Apache 服务器的扩展,但运行时它是独立运行的,所以当你运行tomcat 时,它实际上作为一个与Apache 独立的进程单独运行的。
Tomcat是一个免费的开源的Serlvet容器,用来运行java程序的容器
是开发和调试Servlet(Server Applet)、JSP(Java Server Pages) 程序的首选;
Tomcat就是传说中的中间件之一,tomcat本身是一个容器,专门用来运行java程序,java语言开发的网页.jsp就应该运行于tomcat中,而tomcat本身的运行也依赖于jdk环境。
//常见的中间件:
一般本地开发的话,小项目,或者是个人开发建议使用tomcat;
linux系统建议使用jetty或apache hpppd;
大型的项目就用JBOSS或webloigc;
大项目或者商业项目一般采用:weblgoic/webshere,其他的还有jboss、glasshfish等;
一些示例项目或者小项目常采用jetty;
tomcat , jboss, weblogic, websphere 一般项目tomcat就可以了。
二、部署tomcat
//关闭防火墙和selinux
[root@ws ~]# systemctl stop firewalld
[root@ws ~]# systemctl disable firewalld
Removed symlink /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
[root@ws ~]# cat /etc/selinux/config
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of three values:
# targeted - Targeted processes are protected,
# minimum - Modification of targeted policy. Only selected processes are protected.
# mls - Multi Level Security protection.
SELINUXTYPE=targeted
//安装java
[root@ws ~]# yum -y install java-11-openjdk
//解压tomcat到/usr/local/目录下
[root@ws ~]# ls
anaconda-ks.cfg apache-tomcat-10.0.23.tar.gz initial-setup-ks.cfg 公共 模板 视频 图片 文档 下载 音乐 桌面
[root@ws ~]# tar -xzvf apache-tomcat-10.0.23.tar.gz -C /usr/local/
[root@ws local]# ln -sv apache-tomcat-10.0.23/ tomcat
"tomcat" -> "apache-tomcat-10.0.23/"
//自定义一个Hello World的 java的测试网页
[root@ws ~]# cat /usr/local/tomcat/webapps/test/index.jsp
<html>
<head>
<title>test page</title>
</head>
<body>
<%
out.println("Hello World");
%>
</body>
</html>
//启动tomcat
[root@ws ~]# /usr/local/tomcat/bin/startup.sh
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
Using CATALINA_OPTS:
Tomcat started.
默认端口为8080
通过ps -ef | grep tomcat 可以查看到有java和tomcat的进程,说明服务已经启动成功
[root@ws ~]# ps -ef | grep tomcat
root 10206 1 6 16:09 pts/0 00:00:23 /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 10364 9815 0 16:15 pts/0 00:00:00 grep --color=auto tomcat
//测试访问
访问tomcat首页:http://192.168.110.10:8080

访问hello world测试页:http://192.168.110.10:8080/test/

拓展1:
访问Host Manager界面
//配置tomcat-users.xml文件,在行上面添加两行,设置角色,登录用户名和密码,角色名称只能是admin-gui 用户名和密码自定义
[root@ws ~]# vim /usr/local/tomcat/conf/tomcat-users.xml

//配置host-manager/META-INF/context.xml文件,允许192.168.110.0/24网段访问,在allow字段后添加

//重启服务,先关服务,再启服务
[root@ws ~]# /usr/local/tomcat/bin/catalina.sh stop
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
Using CATALINA_OPTS:
[root@ws ~]# /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
Using CATALINA_OPTS:
Tomcat started.

//访问Server Status
//编辑tomcat-users.xml
[root@ws ~]# vim /usr/local/tomcat/conf/tomcat-users.xml

[root@ws ~]# vim /usr/local/tomcat/webapps/manager/META-INF/context.xml

//重启服务,先关服务,再启服务
[root@ws ~]# /usr/local/tomcat/bin/catalina.sh stop
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
Using CATALINA_OPTS:
[root@ws ~]# /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
Using CATALINA_OPTS:
Tomcat started


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