linux安装java环境 tomcat环境

参考：http://www.linuxidc.com/Linux/2016-09/134941.htm

http://blog.youkuaiyun.com/zhuying_linux/article/details/6583096/

一、用yum安装JDK

1.查看yum库中都有哪些jdk版本(暂时只发现了openjdk)

[root@localhost ~]# yum search java|grep jdk
ldapjdk-javadoc.x86_64 : Javadoc for ldapjdk
java-1.6.0-openjdk.x86_64 : OpenJDK Runtime Environment
java-1.6.0-openjdk-demo.x86_64 : OpenJDK Demos
java-1.6.0-openjdk-devel.x86_64 : OpenJDK Development Environment
java-1.6.0-openjdk-javadoc.x86_64 : OpenJDK API Documentation
java-1.6.0-openjdk-src.x86_64 : OpenJDK Source Bundle
java-1.7.0-openjdk.x86_64 : OpenJDK Runtime Environment
java-1.7.0-openjdk-demo.x86_64 : OpenJDK Demos
java-1.7.0-openjdk-devel.x86_64 : OpenJDK Development Environment
java-1.7.0-openjdk-javadoc.noarch : OpenJDK API Documentation
java-1.7.0-openjdk-src.x86_64 : OpenJDK Source Bundle
java-1.8.0-openjdk.x86_64 : OpenJDK Runtime Environment
java-1.8.0-openjdk-demo.x86_64 : OpenJDK Demos
java-1.8.0-openjdk-devel.x86_64 : OpenJDK Development Environment
java-1.8.0-openjdk-headless.x86_64 : OpenJDK Runtime Environment
java-1.8.0-openjdk-javadoc.noarch : OpenJDK API Documentation
java-1.8.0-openjdk-src.x86_64 : OpenJDK Source Bundle
ldapjdk.x86_64 : The Mozilla LDAP Java SDK

2.选择版本,进行安装

//选择1.7版本进行安装
[root@localhost ~]# yum install java-1.7.0-openjdk
//安装完之后，默认的安装目录是在: /usr/lib/jvm/java-1.7.0-openjdk-1.7.0.75.x86_64

3.设置环境变量

[root@localhost ~]# vi /etc/profile

在profile文件中添加如下内容

#set java environment
JAVA_HOME=/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.141.x86_64/
JRE_HOME=$JAVA_HOME/jre
CLASS_PATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib
PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
export JAVA_HOME JRE_HOME CLASS_PATH PATH

让修改生效

[root@localhost java]# source /etc/profile

4.验证JDK有效性

[root@localhost java]# java -version
java version "1.7.0_141"
OpenJDK Runtime Environment (rhel-2.6.10.1.el6_9-x86_64 u141-b02)
OpenJDK 64-Bit Server VM (build 24.141-b02, mixed mode)

二、安装tomcat

解压unzip apache-tomcat-7.0.72-windows-x86.zip

移动mvapache-tomcat-7.0.72/ /usr/local/

cd /usr/local/

 建立链接ln -s /usr/local/apache-tomcat-7.0.72/ /usr/local/tomcat

[root@master local]# cd tomcat/bin/
[root@master bin]#ls
[root@master bin]#vim catalina.sh
添加以下内容：
CATALINA_HOME=/usr/local/apache-tomcat-7.0.72/

[root@master local]#chmod +x *.sh
三．启动tomcat服务器
[root@master tomcat]# /usr/local/tomcat/bin/catalina.sh start

成功则显示*****************Tomcat started.

看一下日志

[root@master logs]# cd /usr/local/tomcat/logs/
[root@master logs]# tail -f catalina.out

四．在浏览器中输入

http://localhost:8080/（如果不是本机，则输入对应的ip地址）
测试出现tomcat页面则测试成功

五.网站测试

[root@master ~]#  cd  /usr/local/tomcat/conf

[root@master ~]# ls

[root@master ~]# vim server.xml

      <Host name="wjsou.com"  appBase="webapps"
            unpackWARs="true" autoDeploy="true">
            <Context path="/" docBase="/www/web/java_wjsou_com/public_html"/>

重启tomcat

访问：wjsou.com:8080

六. linux添加开机自启动脚本示例详解 

一、在/etc/rc.local中添加
如果不想将脚本粘来粘去，或创建链接什么的，
则:
step1. 先修改好脚本，使其所有模块都能在任意目录启动时正常执行;
step2. 再在/etc/rc.local的末尾添加一行以绝对路径启动脚本的行;
如:
$ vim /etc/rc.local
#!/bin/sh
#
# This script will be executed *after* all the other init scripts.
# You can put your own initialization stuff in here if you don't
# want to do the full Sys V style init stuff.


touch /var/lock/subsys/local
/usr/local/tomcat/bin/catalina.sh start

保存并退出;
再重启动测试下，则在其它的程序都启动完成后，将启动脚本;