Linux下JDK和Tomcat安裝

下載地址
http://www.oracle.com/technetwork/java/javase/downloads/index.html

http://download.oracle.com/otn-pub/java/jdk/8u31-b13/jdk-8u31-linux-x64.tar.gz?AuthParam=1425274077_b32bf92a0bb67039ccba3e32e85fb356

查看環境變量
whereis java
which java （java執行路徑）
echo $JAVA_HOME
echo $PATH

二，安裝
選擇要安裝java的位置，如/usr/目錄下，新建文件夾java(mkdir java)

#mkdir -p /usr/java
拷貝下載的jdk-8u31-linux-x64.tar.gz到/usr/java下

#cd /usr/java
# tar -zxvf jdk-8u31-linux-x64.tar.gz

三、設置變量
# vim /etc/profile
在最後面添加如下內容：
# JAVA
JAVA_HOME=/usr/java/jdk1.8.0_31
CLASSPATH=.:$JAVA_HOME/lib.tools.jar
PATH=$JAVA_HOME/bin:$PATH
export JAVA_HOME CLASSPATH PATH

使變量生效
# source /etc/profile

驗證是否成功
# java -version
java version "1.8.0_31"
Java(TM) SE Runtime Environment (build 1.8.0_31-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.31-b07, mixed mode)

查看變量
# which java //java執行路徑
/usr/java/jdk1.8.0_31/bin/java
# echo $JAVA_HOME
/usr/java/jdk1.8.0_31
# echo $PATH
/usr/java/jdk1.8.0_31/bin:/usr/lib64/qt-3.3/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin


四. 卸載jdk
·找到jdk安裝目錄的_uninst子目錄
·在shell終端執行命令./uninstall.sh即可卸載jdk。

五，安裝tomcat
下載tomcat
wget http://mirrors.cnnic.cn/apache/tomcat/tomcat-8/v8.0.20/bin/apache-tomcat-8.0.20.tar.gz

(1)解壓apache-tomcat-8.0.20.tar.gz
# tar-zxvf apache-tomcat-8.0.20.tar.gz
(2)複製解壓後的目錄apache-tomcat-8.0.20到/usr/local下並重命名爲tomcat8
# cp -Rapache-tomcat-8.0.20 /usr/local/tomcat8
注意：/usr/local/tomcat8就是後面我們要修改環境變量時需要填寫的目錄路徑
(3)
添加tomcat環境變量
# vim /etc/profile
加入下代碼
#set environment variable
JAVA_HOME=/usr/java/jdk1.8.0_31
CLASSPATH=.:$JAVA_HOME/lib.tools.jar
PATH=$JAVA_HOME/bin:$PATH
export JAVA_HOME CLASSPATH PATH
exportTOMCAT_HOME=/usr/local/tomcat8
exportCATALINA_HOME=/usr/local/tomcat8
修改應用環境變量，是配置生效
# source/etc/profile

(4)進入bin目錄 ，啓動tomcat
# cd/usr/local/tomcat8/
# cd bin/
#./startup.sh

(5)修改環境變量後重新啓動tomcat啓動成功
[root@oracledb bin]# ./startup.sh
Using CATALINA_BASE: /usr/local/tomcat8
Using CATALINA_HOME: /usr/local/tomcat8
Using CATALINA_TMPDIR: /usr/local/tomcat8/temp
Using JRE_HOME: /usr/java/jdk1.8.0_31
Using CLASSPATH: /usr/local/tomcat8/bin/bootstrap.jar:/usr/local/tomcat8/bin/tomcat-juli.jar
Tomcat started.

(6)關閉tomcat
[root@oracledb bin]# ./shutdown.sh
Using CATALINA_BASE: /usr/local/tomcat8
Using CATALINA_HOME: /usr/local/tomcat8
Using CATALINA_TMPDIR: /usr/local/tomcat8/temp
Using JRE_HOME: /usr/java/jdk1.8.0_31
Using CLASSPATH: /usr/local/tomcat8/bin/bootstrap.jar:/usr/local/tomcat8/bin/tomcat-juli.jar

(7) 查看進程
[root@oracledb bin]# ps -ef | grep tomcat
root 22552 1 99 09:58 pts/0 00:00:05 /usr/java/jdk1.8.0_31/bin/java -Djava.util.logging.config.file=/usr/local/tomcat8/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.endorsed.dirs=/usr/local/tomcat8/endorsed -classpath /usr/local/tomcat8/bin/bootstrap.jar:/usr/local/tomcat8/bin/tomcat-juli.jar -Dcatalina.base=/usr/local/tomcat8 -Dcatalina.home=/usr/local/tomcat8 -Djava.io.tmpdir=/usr/local/tomcat8/temp org.apache.catalina.startup.Bootstrap start
root 22581 22284 0 09:58 pts/0 00:00:00 grep tomcat

(8)添加管理權限
默認情況下，Tomcat並沒提供具有管理權限的賬號，所以需要添加具有這種權限的賬號。角色manager-gui具有這種權限，但在系統用戶控制文件tomcat-users.xml中並沒有設置這兩種角色和對應的用戶，所以需要添加這種角色和用戶，方法是打開tomcat-users.xml文件，添加如下內容：
<rolerolename="manager-gui"/>
<userusername="manager" password="manager"roles="manager-gui"/>
然後重啓Tomcat服務器，文件修改生效。