CentOS下安装JDK和Tomcat

houbin

　　1.查看CentOS自带的JDK是否安装，如果已经安装卸载
　　#rpm –qa | grep jdk
　　#rpm –qa | grep gcj
　　#yum –y remove java-*-gcj-comat
　　2.安装JDK
　　下载jdk-6u18-linux-i586.bin或者jdk-6u18-linux-i586-rpm.bin，本次安装使用jdk-6u18-linux-i586.bin
　　#mkdir /usr/local/java
　　#cd .usr/local/java
　　#chmod +x jdk-6u18-linux-i586.bin
　　#./jdk-6u18-linux-i586.bin
　　选择YES
　　3.配置环境变量
　　#vi /etc/profile
　　在最后加入以下几行
　　export JAVA_HOME=/usr/local/java/jdk1.6.0_18
export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$PATH:$JAVA_HOME/bin
　　4.#reboot
　　5.检查
　　[iyunv@nagios conf]# echo $JAVA_HOME
/usr/local/java/jdk1.6.0_18
　　[iyunv@nagios conf]# echo $PATH
/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/java/jdk1.6.0_18/bin:/root/bin
　　[iyunv@nagios conf]# echo $CLASSPATH
.:/usr/local/java/jdk1.6.0_18/jre/lib/rt.jar:/usr/local/java/jdk1.6.0_18/lib/dt.jar:/usr/local/java/jdk1.6.0_18/lib/tools.jar
　　[iyunv@nagios conf]# java -version
java version "1.6.0_18"
Java(TM) SE Runtime Environment (build 1.6.0_18-b07)
Java HotSpot(TM) Client VM (build 16.0-b13, mixed mode, sharing)
　　6.下载tomcat
　　#tar –zxvf  apache-tomcat-6.0.18.tar.gz
　　#mv apache-tomcat-6.0.18 /usr/local/tomcat
　　启动tomcat
　　[iyunv@nagios conf]# /usr/local/tomcat/bin/startup.sh
Using CATALINA_BASE:   /usr/local/tomcat
Using CATALINA_HOME:   /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME:       /usr/local/java/jdk1.6.0_18
　　默认访问http://localhost:8080,出现默认页面，说明安装成功
　　注册自己的项目，放到/usr/local/tomcat/webapps
　　把短信机发送程序sms.war放在 /usr/local/tomcat/webapps
　　修改默认端口可以在/usr/localtomcat/conf/server.xml中
　　关闭tomcat
　　[iyunv@nagios conf]# /usr/local/tomcat/bin/shutdown.sh
Using CATALINA_BASE:   /usr/local/tomcat
Using CATALINA_HOME:   /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME:       /usr/local/java/jdk1.6.0_18
　　#vi /etc/rc.d/rc.local
　　JAVA_HOME=/usr/local/java/jdk1.6.0_18
　　export JAVA_HOME
　　/usr/local/tomcat/bin/shutdown.sh  开机启动