下载地址?AuthParam=1425274077_b32bf92a0bb67039ccba3e32e85fb356查看环境变量whereis javawhich java （java执行路径）echo $JAVA_HOMEecho $PATH二，安装选择要安装java的位置，如/usr/目录下，新建文件夹java(mkdir java)#mkdir -p /usr/java拷贝下载的jdk-8u31-linux-x64.tar.gz到/usr/java下#cd /usr/java# tar -zxvf jdk-8u31-linux-x64.tar.gz三、设置变量# vim /etc/profile在最后面添加如下内容：# JAVAJAVA_HOME=/usr/java/jdk1.8.0_31CLASSPATH=.:$JAVA_HOME/lib.tools.jarPATH=$JAVA_HOME/bin:$PATHexport JAVA_HOME CLASSPATH PATH使变量生效# source /etc/profile验证是否成功# java -versionjava 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)查看变量# which java //java执行路径/usr/java/jdk1.8.0_31/bin/java# echo $JAVA_HOME/usr/java/jdk1.8.0_31# echo $PATH/usr/java/jdk1.8.0_31/bin:/usr/lib64/qt-3.3/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin四. 卸载jdk·找到jdk安装目录的_uninst子目录·在shell终端执行命令./uninstall.sh即可卸载jdk。五，安装tomcat下载tomcatwget (1)解压apache-tomcat-8.0.20.tar.gz# tar-zxvf apache-tomcat-8.0.20.tar.gz(2)复制解压后的目录apache-tomcat-8.0.20到/usr/local下并重命名为tomcat8# cp -Rapache-tomcat-8.0.20 /usr/local/tomcat8注意：/usr/local/tomcat8就是后面我们要修改环境变量时需要填写的目录路径(3)添加tomcat环境变量# vim /etc/profile加入下代码#set environment variableJAVA_HOME=/usr/java/jdk1.8.0_31CLASSPATH=.:$JAVA_HOME/lib.tools.jarPATH=$JAVA_HOME/bin:$PATHexport JAVA_HOME CLASSPATH PATHexportTOMCAT_HOME=/usr/local/tomcat8exportCATALINA_HOME=/usr/local/tomcat8修改应用环境变量，是配置生效# source/etc/profile(4)进入bin目录 ，启动tomcat# cd/usr/local/tomcat8/# cd bin/#./startup.sh(5)修改环境变量后重新启动tomcat启动成功[root@oracledb bin]# ./startup.sh Using CATALINA_BASE: /usr/local/tomcat8Using CATALINA_HOME: /usr/local/tomcat8Using CATALINA_TMPDIR: /usr/local/tomcat8/tempUsing JRE_HOME: /usr/java/jdk1.8.0_31Using CLASSPATH: /usr/local/tomcat8/bin/bootstrap.jar:/usr/local/tomcat8/bin/tomcat-juli.jarTomcat started.(6)关闭tomcat[root@oracledb bin]# ./shutdown.shUsing CATALINA_BASE: /usr/local/tomcat8Using CATALINA_HOME: /usr/local/tomcat8Using CATALINA_TMPDIR: /usr/local/tomcat8/tempUsing JRE_HOME: /usr/java/jdk1.8.0_31Using CLASSPATH: /usr/local/tomcat8/bin/bootstrap.jar:/usr/local/tomcat8/bin/tomcat-juli.jar(7) 查看进程[root@oracledb bin]# ps -ef | grep tomcatroot 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 startroot 22581 22284 0 09:58 pts/0 00:00:00 grep tomcat(8)添加管理权限默认情况下，Tomcat并没提供具有管理权限的账号，所以需要添加具有这种权限的账号。角色manager-gui具有这种权限，但在系统用户控制文件tomcat-users.xml中并没有设置这两种角色和对应的用户，所以需要添加这种角色和用户，方法是打开tomcat-users.xml文件，，添加如下内容：<rolerolename="manager-gui"/><userusername="manager" password="manager"roles="manager-gui"/>然后重启Tomcat服务器，文件修改生效。
在向山靠近一点，才发现这座山，好象一位诗人遥望远方，
