day60：Tomcat及JDK介绍：

时间 2019-11-06

标签 day60 day tomcat jdk 介绍栏目 Tomcat 繁體版

原文原文链接

一、Tomcat是Apache软件基金会(Apache software foundation),的Jakarta项目中的一个核心项目，由Apache、Sun和其余一些公司及我的共同开发而成。
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不少的场合下被广泛使用,实际上tomcat是apache的一个扩展,但运行时它是独立运行的,全部当运行tomcat时,它是做为一个与apache独立的进程单独运行的：html

java程序写的网站用Tomcat+JDK来运行，java

Tomcat是一个中间件，真正起做用的，解析Java脚本的是JDK。JDK（Java development kit）是整个Java的核心，它包含了Java运行环境和一堆Java相关的工具以及Java基础库。
最主流的JDK是由sun公司发布的JDK，除此以外，IBM公司也有发布JDK，centos上也可使用yum安装openjdk。mysql

二、安装jdk：jdk经常使用版本有1.6 1.7 1.8：简称 6 7 8：本次咱们使用的是8：linux

须要打开官网地址：http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html web

手动下载到本机器,并借助xshell的rz工具上传到/usr/local/src目录下：以下：sql

[root@localhost_002 111.com]# cd /usr/local/src/
[root@localhost_002 src]# ls jdk-8u181-linux-x64.tar.gz 
jdk-8u181-linux-x64.tar.gz

解压： shell

[root@localhost_002 src]# tar zxvf jdk-8u181-linux-x64.tar.gzapache

挪目录位置：bootstrap

[root@localhost_002 src]# cp -r jdk1.8.0_181/ /usr/local/jdk1.8
[root@localhost_002 src]# cd /usr/local/jdk1.8/
设置环境变量,在文本最下面添加以下内容： vim /etc/profilevim

[root@localhost_002 jdk1.8]#vim /etc/profile
JAVA_HOME=/usr/local/jdk1.8/
JAVA_BIN=/usr/local/jdk1.8/bin
JRE_HOME=/usr/local/jdk1.8/jre
PATH=$PATH:/usr/local/jdk1.8/bin:/usr/local/jdk1.8/jre/bin
CLASSPATH=/usr/local/jdk1.8/jre/lib:/usr/local/jdk1.8/lib:/usr/local/jdk1.8/jre/lib/charsets.jar
[root@localhost_002 jdk1.8]# source /etc/profile #刷新配置生效：

坚持jdk是否安装成功： java -version

[root@localhost_002 jdk1.8]# java -version
java version "1.8.0_181"
Java(TM) SE Runtime Environment (build 1.8.0_181-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode)

安装步骤：

下载步骤略过：
[root@localhost_002 src]# tar zxvf jdk-8u181-linux-x64.tar.gz
[root@localhost_002 src]# cp -r  jdk1.8.0_181/ /usr/local/jdk1.8
[root@localhost_002 src]# cd /usr/local/jdk1.8/
[root@localhost_002 jdk1.8]# vim /etc/profile
JAVA_HOME=/usr/local/jdk1.8/
JAVA_BIN=/usr/local/jdk1.8/bin
JRE_HOME=/usr/local/jdk1.8/jre
PATH=$PATH:/usr/local/jdk1.8/bin:/usr/local/jdk1.8/jre/bin
CLASSPATH=/usr/local/jdk1.8/jre/lib:/usr/local/jdk1.8/lib:/usr/local/jdk1.8/jre/lib/charsets.jar 
[root@localhost_002 jdk1.8]# source /etc/profile    #刷新配置生效：


[root@localhost_002 jdk1.8]# java -version
java version "1.8.0_181"
Java(TM) SE Runtime Environment (build 1.8.0_181-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode)

二、安装Tomcat:tomcat是一个中间件,真正起做用的是jdk,而访问80 须要有一个webserver,须要依赖jdk:

1：下载： wget http://apache.fayea.com/tomcat/tomcat-8/v8.5.33/bin/apache-tomcat-8.5.33.tar.gz

解压并挪目录：

tar zxvf apache-tomcat-8.5.33.tar.gz
mv apache-tomcat-8.5.33 /usr/local/tomcat

而后直接启动tomcat便可： /usr/local/tomcat/bin/startup.sh

[root@localhost_002 tomcat]# /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/local/jdk1.8
Using CLASSPATH: /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar
Tomcat started.

#详细安装步骤：
[root@localhost_002 src]# wget http://apache.fayea.com/tomcat/tomcat-8/v8.5.20/bin/apache-tomcat-8.5.20.tar.gz
[root@localhost_002 src]# tar zxvf apache-tomcat-8.5.33.tar.gz          #解压：
[root@localhost_002 src]# mv apache-tomcat-8.5.33 /usr/local/tomcat     #挪位置：
[root@localhost_002 tomcat]# /usr/local/tomcat/bin/startup.sh           #启动tomcat:
Using CATALINA_BASE:   /usr/local/tomcat
Using CATALINA_HOME:   /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME:        /usr/local/jdk1.8
Using CLASSPATH:       /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar
Tomcat started.

2:查看tomcat是否启动： ps aux |grep tomcat ：有java字眼则启动了：

[root@localhost_002 tomcat]# ps aux |grep tomcat
root       1430  2.8  8.6 2294196 86696 pts/0   Sl   19:07   0:04 /usr/local/jdk1.8/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       1478  0.0  0.0 112720   972 pts/0    R+   19:10   0:00 grep --color=auto tomcat

3:关闭tomcat,有时当修改了配置文件,须要先关闭在启动：

[root@localhost_002 tomcat]# /usr/local/tomcat/bin/shutdown.sh 
Using CATALINA_BASE:   /usr/local/tomcat
Using CATALINA_HOME:   /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME:        /usr/local/jdk1.8
Using CLASSPATH:       /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar

4:查看其监听的端口(8005)： netstat -lntp

[root@localhost_002 tomcat]# netstat -lntp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0      0 0.0.0.0:52588           0.0.0.0:*               LISTEN      871/sshd            
tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN      1081/master         
tcp6       0      0 :::52588                :::*                    LISTEN      871/sshd            
tcp6       0      0 :::8080                 :::*                    LISTEN      1430/java           
tcp6       0      0 :::80                   :::*                    LISTEN      1212/httpd          
tcp6       0      0 ::1:25                  :::*                    LISTEN      1081/master         
tcp6       0      0 127.0.0.1:8005          :::*                    LISTEN      1430/java           
tcp6       0      0 :::8009                 :::*                    LISTEN      1430/java           
tcp6       0      0 :::3306                 :::*                    LISTEN      1094/mysqld 
[root@localhost_002 tomcat]# netstat -lntp |grep java
tcp6       0      0 :::8080                 :::*                    LISTEN      1528/java           
tcp6       0      0 127.0.0.1:8005          :::*                    LISTEN      1528/java           
tcp6       0      0 :::8009                 :::*                    LISTEN      1528/java

而后咱们发现java启动的端口有3个: 8080 8009 8005

8080：提供web服务的端口:

8005：为管理管理端口：

8009：为第三方服务调用的端口：好比httpd和tomcat结合时会使用：