centos安装JDK以及tomcat

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1下载 jdk-8u91-linux-x64.tar.gz：
wget --no-check-certificate --no-cookies --header "Cookie: Oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/7u71-b14/jdk-7u71-linux-x64.rpm
wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u91-b14/jdk-8u91-linux-x64.tar.gz
wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u91-b14/jdk-8u91-linux-x64.rpm
wget --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie;" http://download.oracle.com/otn-pub/java/jdk/7u65-b17/jdk-7u65-linux-x64.tar
wget https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-rhel70-3.2.6.tgz
wget http://download.redis.io/releases/redis-3.0.7.tar.gz
wget http://mirror.bit.edu.cn/apache/tomcat/tomcat-9/v9.0.0.M4/bin/apache-tomcat-9.0.0.M4.tar.gz
wget http://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.12-1.el7.x86_64.rpm-bundle.tar
wget http://apache.fayea.com/zookeeper/zookeeper-3.4.8/zookeeper-3.4.8.tar.gz
wget http://memcached.org/files/memcached-1.4.25.tar.gz

2 j解压缩 jdk-8u91-linux-x64.tar.gz 文件：
tar -zxvf jdk-8u91-linux-x64.tar.gz

3返回到上一级并创建 /usr/local/jdk 目录：
cd ..
mkdir -p jdk

4进入到 tools 目录后将 jdk1.8.0_91 移动到 jdk 目录中：
cd ../tools/
mv jdk1.8.0_91/ ../jdk/

5打开 /etc/ 目录下的 profile 文件：
vi /etc/profile
将如下代码追加到 profile 文件末尾：
# idea - jdk8 settings start 2016-05-01

JAVA_HOME=/usr/local/jdk/jdk1.8.0_91
JRE_HOME=$JAVA_HOME/jre
PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
CLASSPATH=:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib/dt.jar
export JAVA_HOME JRE_HOME PATH CLASSPATH

6.source /etc/profile

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