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    CentOS 6下安裝配置JDK+Tomcat環(huán)境

    1.安裝OpenJDK

    這里安裝的OpenJDK,是開源版本的JDK,我們平時自己電腦上安裝的是 Sun JDK(也叫Oracle JDK),OpenJDK可以看作Sun JDK的精簡版。
    如果想安裝SunJDK,請參照下方的tomcat安裝方法,步驟是一樣的,注意liunx有些自帶OpenJDK,需卸載。

    注意,安裝OpenJDK簡單迅速,只需一條命令,且無需配置環(huán)境變量

    ①查看是否已經安裝了JDK

    java -version  rpm -qa |grep java   rpm -qa |grep jdk 

    ②若有如何卸載

    卸載JDK相關文件輸入:

    yum -y remove java-1.8.0-openjdk*

    卸載tzdata-java輸入:

    yum -y remove tzdata-java.noarch

    ③安裝

    yum list java* #查看版本    yum list java-1.8* #查看1.8版本    yum install java-1.8.0-openjdk* -y # 安裝

    執(zhí)行:

    [root@localhost ~]# yum -y install java-1.8.0-openjdk*  Loaded plugins: fastestmirror  Setting up Install Process  Loading mirror speeds from cached hostfile  * base: repos-lax.psychz.net  * elrepo-kernel: repos.lax-noc.com  * extras: repos-lax.psychz.net  * updates: mirrors.oit.uci.edu  Resolving Dependencies  --> Running transaction check  ---> Package java-1.8.0-openjdk.i686 1:1.8.0.191.b12-0.el6_10 will be installed  ...    Complete!

    ④檢查安裝結果

    [root@localhost ~]# java -version  openjdk version "1.8.0_191"  OpenJDK Runtime Environment (build 1.8.0_191-b12)  OpenJDK Server VM (build 25.191-b12, mixed mode)

    執(zhí)行java和javac,正常,無需配置環(huán)境變量

    3.安裝tomcat

    ①去官網下載安裝包

    https://tomcat.apache.org/download-90.cgi  這里我下的是9.0的版本

    CentOS 6下安裝配置JDK+Tomcat環(huán)境

    ②上傳至服務器然后解壓

    這里我用的FileZilla 上傳到ftp賬戶里

    [root@localhost ftpuser]# ls  222  apache-tomcat-9.0.13.tar.gz  dir1-0  dir1-1

    然后復制此文件到/usr/local/tomcat/目錄下

    tomcat目錄為自己創(chuàng)建,安裝對路徑并無要求

    [root@localhost ftpuser]# cp apache-tomcat-9.0.13.tar.gz /usr/local/tomcat/  [root@localhost ftpuser]# cd /usr/local/tomcat  [root@localhost tomcat]# ls  apache-tomcat-9.0.13.tar.gz

    進入文件所在目錄解壓即可

    [root@localhost tomcat]# tar zxvf apache-tomcat-9.0.13.tar.gz

    ③啟動tomcat

    [root@localhost tomcat]# cd apache-tomcat-9.0.13/bin  [root@localhost bin]# ./startup.sh  Using CATALINA_BASE:   /usr/local/tomcat/apache-tomcat-9.0.13  Using CATALINA_HOME:   /usr/local/tomcat/apache-tomcat-9.0.13  Using CATALINA_TMPDIR: /usr/local/tomcat/apache-tomcat-9.0.13/temp  Using JRE_HOME:        /usr  Using CLASSPATH:       /usr/local/tomcat/apache-tomcat-9.0.13/bin/bootstrap.jar:/usr/local/tomcat/apache-tomcat-9.0.13/bin/tomcat-juli.jar  Tomcat started.

    關閉防火墻或者開放端口后,即可用任意一臺設備訪問tomcat

    開啟端口  [root@localhost ~]# /sbin/iptables -I INPUT -p tcp –dport 8080 -j ACCEPT #開啟8080端口   [root@localhost ~]# /etc/rc.d/init.d/iptables save #保存配置   [root@localhost ~]# /etc/rc.d/init.d/iptables restart #重啟防火墻  關閉防火墻  service iptables stop #暫時關閉  chkconfig iptables off #設置成開啟不自啟

    如我在自己電腦的瀏覽器輸入 服務器ip:8080

    CentOS 6下安裝配置JDK+Tomcat環(huán)境

    ④查看tomcat版本

    [root@localhost bin]# ./catalina.sh version  Using CATALINA_BASE:   /usr/local/tomcat/apache-tomcat-9.0.13  Using CATALINA_HOME:   /usr/local/tomcat/apache-tomcat-9.0.13  Using CATALINA_TMPDIR: /usr/local/tomcat/apache-tomcat-9.0.13/temp  Using JRE_HOME:        /usr  Using CLASSPATH:       /usr/local/tomcat/apache-tomcat-9.0.13/bin/bootstrap.jar:/usr/local/tomcat/apache-tomcat-9.0.13/bin/tomcat-juli.jar  Server version: Apache Tomcat/9.0.13  Server built:   Nov 2 2018 14:27:55 UTC  Server number:  9.0.13.0  OS Name:        Linux  OS Version:     4.10.4-1.el6.elrepo.i686  Architecture:   i386  JVM Version:    1.8.0_191-b12  JVM Vendor:     Oracle Corporation  [root@localhost bin]# 

    ⑤關閉tomcat

    查看tomcat是否運行

    ps -ef | grep tomcat  [root@localhost bin]# ps -ef | grep tomcat  root      6975  6663  0 11:43 pts/1    00:00:00 grep tomcat

    關閉tomcat(執(zhí)行shutdown.sh腳本)

    [root@localhost apache-tomcat-9.0.13]# cd bin  [root@localhost bin]# ./shutdown.sh  Using CATALINA_BASE:   /usr/local/tomcat/apache-tomcat-9.0.13  Using CATALINA_HOME:   /usr/local/tomcat/apache-tomcat-9.0.13  Using CATALINA_TMPDIR: /usr/local/tomcat/apache-tomcat-9.0.13/temp  Using JRE_HOME:        /usr  Using CLASSPATH:       /usr/local/tomcat/apache-tomcat-9.0.13/bin/bootstrap.jar:/usr/local/tomcat/apache-tomcat-9.0.13/bin/tomcat-juli.jar

    ⑥卸載tomcat

    直接刪除安裝目錄

    rm -rf /usr/local/tomcat/apache-tomcat-9.0.13
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