CentOS7安裝openjdk、tomcat和mysql流程介紹

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首先是前戲，推薦一個遠程工具Xshell和Xftp搭配使用，以下是Xshell的官網 
http://www.netsarang.com/products/xsh_overview.html

1.openjdk

How to download and install prebuilt OpenJDK packages

JDK 8

Debian, Ubuntu, etc.

On the command line, type:

$ sudo apt-get install openjdk-8-jre

The openjdk-8-jre package contains just the Java Runtime Environment. If you want to develop Java programs then please install the openjdk-8-jdk package.

Fedora, Oracle Linux, Red Hat Enterprise Linux, etc.

On the command line, type:

$ su -c “yum install java-1.8.0-openjdk”

The java-1.8.0-openjdk package contains just the Java Runtime Environment. If you want to develop Java programs then install the java-1.8.0-openjdk-devel package.

以上說了不同系統的安裝方式，還指出命令只是安裝了JRE，如果你需要開發應用程式，還需要另外安裝（已經用加粗標識），想安裝其它版本詳情看openjdk官網介紹 
http://openjdk.java.net/install/

[root@VM_207_229_centos ~]# java -versionopenjdk version "1.8.0_71"OpenJDK Runtime Environment (build 1.8.0_71-b15)OpenJDK 64-Bit Server VM (build 25.71-b15, mixed mode)

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2.tomcat

# cd /usr/local# wget https://mirrors.tuna.tsinghua.edu.cn/apache/tomcat/tomcat-8/v8.0.36/bin/apache-tomcat-8.0.36.tar.gz# tar xzf apache-tomcat-8.0.36.tar.gz# mv apache-tomcat-8.0.36 tomcat# lsapache-tomcat-8.0.36.tar.gz  etc    include  lib64    logs    sa    share  tomcat   bin   games  lib   libexec  qcloud  sbin  src

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個人習慣把tomcat放在/user/local下，下載後解壓，再更名為tomcat 
想要其它版本的話……在以下地址找好路徑下載 
https://mirrors.tuna.tsinghua.edu.cn/apache/tomcat/

修改設定檔conf/server.xml改為監聽80連接埠，預設編碼utf-8，並開啟gzip壓縮

<Connector port="80" protocol="HTTP/1.1"               connectionTimeout="20000"               redirectPort="8443" executor="tomcatThreadPool" URIEncoding="utf-8"                  compression="on"                  compressionMinSize="50" noCompressionUserAgents="gozilla, traviata"                  compressableMimeType="text/html,text/xml,text/javascript,text/css,text/plain" />    <!-- A "Connector" using the shared thread pool-->

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啟動tomcat，在瀏覽器輸入ip地址訪問，看到tomcat小貓頁面就行了。CentOS7開放80連接埠，Centos 7使用firewalld代替了原來的iptables。

<!-- 啟動防火牆 --># systemctl start  firewalld<!-- 開啟80連接埠，出現success表明添加成功 --># firewall-cmd --zone=public --add-port=80/tcp --permanent<!-- 重啟防火牆 --># systemctl restart firewalld.service<!-- 檢查連接埠 --># firewall-cmd --permanent --zone=public --list-ports<!-- 自啟動防火牆 -->#systemctl enable firewalld

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還有更改預設訪問地址，不想見到tomcat小貓（此步驟看個人需要）

<Engine name="Catalina" defaultHost="www.caihongwen.cn">     <Realm className="org.apache.catalina.realm.LockOutRealm">       <Realm className="org.apache.catalina.realm.UserDatabaseRealm"               resourceName="UserDatabase"/>      </Realm>      <Host name="www.caihongwen.cn"  appBase="webapps"            unpackWARs="true" autoDeploy="true">        <Context docBase="blog" path="" debug="0"  reloadable="true"/>               <!-- Access log processes all example.             Documentation at: /docs/config/valve.html             Note: The pattern used is equivalent to using pattern="common" -->        <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"               prefix="localhost_access_log" suffix=".txt"               pattern="%h %l %u %t &quot;%r&quot; %s %b" />      </Host>    </Engine>

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請在意Host之間添加了一段代碼

<Context docBase="blog" path="" debug="0"  reloadable="true"/>

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這個blog是放在webapps的項目war包名，通過ip或網域名稱直接進入部落格，不會出現tomcat小貓管理頁面，第一次啟動tomcat稍慢，新增加的war包需要重啟一次才能起效。還有一個要點是對外開啟80連接埠。

3.mysql

使用RPM包進行安裝，這種安裝進程會自動完成系統的相關配置，比較方便。 
另外有.tar.gz的壓縮檔安裝方式，推薦一個部落格的介紹。 
http://blog.csdn.net/superchanon/article/details/8546254/

卸載原有MySQL或者Mariadb安裝程式 
1、CentOs7版本預設情況下安裝了mariadb-libs，必須先卸載才可以繼續安裝MySql。 
a) 尋找以前是否安裝mariadb-libs

# rpm -qa | grep -i mariadb-libs

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b)卸載已經安裝的mariadb-libs

# yum remove mariadb-libs-5.5.44-2.el7.centos.x86_64

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2、尋找以前是否安裝MySQL

 # rpm -qa | grep -i mysql

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有的話，也刪除

安裝MySQL

# wget http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm# rpm -ivh mysql-community-release-el7-5.noarch.rpm# yum install mysql-community-server

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成功安裝之後重啟mysql服務

# service mysqld restart

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初次安裝mysql是root賬戶是沒有密碼的，設定密碼的方法

# mysql -urootmysql> set password for ‘root‘@‘localhost‘ = password(‘mypasswd‘);

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遠程授權串連mysql

mysql> GRANT ALL PRIVILEGES ON *.* TO ‘root‘@‘%‘ IDENTIFIED BY ‘mypasswd‘ WITH GRANT OPTION;FLUSH   PRIVILEGES;

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修改mysql預設編碼

# vim /etc/my.cnf

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作出以下修改

[client]default-character-set=utf8[mysqld]character_set_server=utf8

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然後重啟mysql

# service mysqld restart# mysql -uroot -pmysql> show variables like ‘character%‘;+--------------------------+----------------------------+| Variable_name            | Value                      |+--------------------------+----------------------------+| character_set_client     | utf8                       || character_set_connection | utf8                       || character_set_database   | utf8                       || character_set_filesystem | binary                     || character_set_results    | utf8                       || character_set_server     | utf8                       || character_set_system     | utf8                       || character_sets_dir       | /usr/share/mysql/charsets/ |+--------------------------+----------------------------+8 rows in set (0.00 sec)mysql> show variables like ‘collation%‘;+----------------------+-----------------+| Variable_name        | Value           |+----------------------+-----------------+| collation_connection | utf8_general_ci || collation_database   | utf8_general_ci || collation_server     | utf8_general_ci |+----------------------+-----------------+3 rows in set (0.00 sec)

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安裝mysql-jdbc驅動

# yum install mysql-connector-java

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完工！！！

遠端連線mysql，如果串連不上的話，可能是沒開放3306連接埠。 
最後，分享一個mysql遠端管理神器navicat，你懂的 
http://pan.baidu.com/s/1mh87vGc

CentOS7安裝openjdk、tomcat和mysql流程介紹