一.下载JDK
1.登录Sun的JDK官方下载网址:http://www.oracle.com/technetwork/java/archive-139210.html
2.下载jdk-1_5_0_07-linux-i586-rpm.bin文件
二.安装JDK
1.增加jdk-1_5_0_07-linux-i586-rpm.bin文件的可执行权限
#root> chmod 755 jdk-1_5_0_07-linux-i586-rpm.bin
2.执行jdk-1_5_0_07-linux-i586-rpm.bin
#root> ./ jdk-1_5_0_07-linux-i586-rpm.bin
3.安装PRM包文件
#root> rpm -ivh jdk-1_5_0_07-linux-i586.rpm
Last login: Wed Jun 20 15:59:55 2012 from 10.223.15.220
[root@V8bs2 ~]# ls
1 anaconda-ks.cfg Desktop install.log install.log.syslog
[root@V8bs2 ~]# cd ../
[root@V8bs2 /]# ls
bin dev home lib media mnt proc sbin srv tmp v8bs var
boot etc initrd lost+found misc opt root selinux sys usr v8bsex
[root@V8bs2 /]# cd usr
[root@V8bs2 usr]# ls
bin games java lib local sbin src X11R6
etc include kerberos libexec lost+found share tmp
[root@V8bs2 usr]# cd java
[root@V8bs2 java]# ls
jdk-6u18-linux-i586-rpm.bin
[root@V8bs2 java]# chmod 755 jdk-6u18-linux-i586-rpm.bin [root@V8bs2 java]# ./jdk-6u18-linux-i586-rpm.bin Sun Microsystems, Inc. Binary Code License Agreement
for the JAVA SE DEVELOPMENT KIT (JDK), VERSION 6
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Please enter "yes" or "no".
Do you agree to the above license terms? [yes or no]
yes
Unpacking...
Checksumming...
Extracting...
UnZipSFX 5.50 of 17 February 2002, by Info-ZIP (Zip-Bugs@lists.wku.edu).
inflating: jdk-6u18-linux-i586.rpm
inflating: sun-javadb-common-10.5.3-0.2.i386.rpm
inflating: sun-javadb-core-10.5.3-0.2.i386.rpm
inflating: sun-javadb-client-10.5.3-0.2.i386.rpm
inflating: sun-javadb-demo-10.5.3-0.2.i386.rpm
inflating: sun-javadb-docs-10.5.3-0.2.i386.rpm
inflating: sun-javadb-javadoc-10.5.3-0.2.i386.rpm
婧栧倷涓?.. ########################################### [100%]
宸茬稉瀹夎 jdk-1.7.0_04-fcs 濂椾欢锛堟瘮 jdk-1.6.0_18-fcs 鏂帮級
妾旀 /etc/init.d/jexec 鏈夋墍琛濈獊锛屽湪瑭﹀湒瀹夎 jdk-1.6.0_18-fcs 鏅傦紙渚嗚嚜濂椾欢 jdk-1.7.0_04-fcs锛?
Installing JavaDB
婧栧倷涓?.. ########################################### [100%]
1:sun-javadb-common ########################################### [ 17%]
2:sun-javadb-core ########################################### [ 33%]
3:sun-javadb-client ########################################### [ 50%]
4:sun-javadb-demo ########################################### [ 67%]
5:sun-javadb-docs ########################################### [ 83%]
6:sun-javadb-javadoc ########################################### [100%]
Done.
[root@V8bs2 java]# ls
jdk-6u18-linux-i586.rpm sun-javadb-core-10.5.3-0.2.i386.rpm
jdk-6u18-linux-i586-rpm.bin sun-javadb-demo-10.5.3-0.2.i386.rpm
sun-javadb-client-10.5.3-0.2.i386.rpm sun-javadb-docs-10.5.3-0.2.i386.rpm
sun-javadb-common-10.5.3-0.2.i386.rpm sun-javadb-javadoc-10.5.3-0.2.i386.rpm
[root@V8bs2 java]# rpm -qa|grep jdk
jdk-1.7.0_04-fcs
[root@V8bs2 java]# rpm -e --nodeps jdk-1.7.0_04-fcs
[root@V8bs2 java]# rpm -qa|grep jdk
[root@V8bs2 java]# ls
jdk-6u18-linux-i586.rpm sun-javadb-core-10.5.3-0.2.i386.rpm
jdk-6u18-linux-i586-rpm.bin sun-javadb-demo-10.5.3-0.2.i386.rpm
sun-javadb-client-10.5.3-0.2.i386.rpm sun-javadb-docs-10.5.3-0.2.i386.rpm
sun-javadb-common-10.5.3-0.2.i386.rpm sun-javadb-javadoc-10.5.3-0.2.i386.rpm
[root@V8bs2 java]# rpm -ivh jdk-6u18-linux-i586.rpm
婧栧倷涓?.. ########################################### [100%]
1:jdk ########################################### [100%]
Unpacking JAR files...
rt.jar...
jsse.jar...
charsets.jar...
tools.jar...
localedata.jar...
plugin.jar...
javaws.jar...
deploy.jar...
[root@V8bs2 java]# ls
default sun-javadb-common-10.5.3-0.2.i386.rpm
jdk1.6.0_18 sun-javadb-core-10.5.3-0.2.i386.rpm
jdk-6u18-linux-i586.rpm sun-javadb-demo-10.5.3-0.2.i386.rpm
jdk-6u18-linux-i586-rpm.bin sun-javadb-docs-10.5.3-0.2.i386.rpm
latest sun-javadb-javadoc-10.5.3-0.2.i386.rpm
sun-javadb-client-10.5.3-0.2.i386.rpm
重启 reboot
[root@V8bs2 ~]# java -version
java version "1.6.0_18"
Java(TM) SE Runtime Environment (build 1.6.0_18-b07)
Java HotSpot(TM) Server VM (build 16.0-b13, mixed mode)
三.配置环境变量PATH,JAVA_HOME,CLASSPATH
配置环境变量有三种:
1.修改/etc/profile文件(系统有效)
(1)#root > vi /etc/profile
(2)使用VI编辑器在profile文件最后添加以下语句:
#set java environment
JAVA_HOME=/usr/java/jdk1.6.0_18
PATH=$JAVA_HOME/bin:$PATH
CLASSPATH=.$JAVA_HOME/lib/dt.jar:JAVA_HOME/lib/tools.jar
export JAVA_HOME CLASSPATH PATH
(3)重新登录
[注意]
<1>Linux下环境变量使用:分隔路径，不同于Windows下的；
<2>Linux使用(＄+环境变量名)来引用原来变量的值,Windows则是使用%+环境变量名+%.比如＄PATH和%PATH%
<3>CLASSPATH中不能存在空格，如Windows下的C:\Documents and Settings\seagar\jdk1.5将是不合法的路径名
<4>CLASSPATH中的当前目录"."不能忽略
<5>export把环境变量导出为全局变量
<6>大小写严格区分
2.修改.bashrc文件(个人用户有效)
(1)#root > vi /home/seagar/.bashrc
(2)使用VI编辑器在.bashrc文件中添加以下语句:
JAVA_HOME=/usr/java/jdk1.5
PATH=＄JAVA_HOME/bin:＄PATH
CLASSPATH=.＄JAVA_HOME/lib/dt.jar:JAVA_HOME/lib/tools.jar export JAVA_HOME,PATH,CLASSPAT
3.直接在shell修改(当前Shell有效)
export JAVA_HOME=/usr/java/jdk1.5
export PATH=＄JAVA_HOME/bin:＄PATH
export CLASSPATH=.＄JAVA_HOME/lib/dt.jar:JAVA_HOME/lib/tools.jar
查看是否安装成功
[root@V8bs2 java]# java -version
四.测试安装情况
1.java -version查看版本号
2.使用VI编辑器编写一个Java程序
(1)#root > vi Hello.java
(2)编写程序
public class Hello {
public static void main(String[] args)
{
System.out.println("Hello");
}
}
3.编译:javac Hello.java
4.执行:java Hello
五.卸载jdk
卸载rpm版的jdk：
#rpm -qa|grep jdk
显示：jdk-1.6.0_10-fcs
这就说明了你安装了jdk，下面卸载了它， 卸载：#rpm -e --nodeps jdk-1.6.0_10-fcs
2.TOMCAT
一，安装前的准备：
1,Linux版本：[root@tpwb /]# uname -r 2.6.9-34.EL（版本内核）
2，tomcat版本：jakarta-tomcat-5.0.28.tar（大小：10.2M）
你可以去http://jakarta.apache.org/tomcat 下载
二，tomcat的安装 安装前看看Tomcat安装的信息，上面也有关于Tomcat安装的信息，可以作为参考。
//从一个Linux复制文件到另一个Linux：scp root@192.168.1.240:/zsk/hollykm/test.txt /home/test_copy.txt
3,下面开始安装。
[root@tpwb ~]# cd /usr/local [root@tpwb local]# ls
bin games lib lost+found sbin src etc include jakarta-tomcat-5.0.28.tar.gz libexec man share
我把j2sdk-1_4_2_04-linux-i586-rpm.bin放在local目录下，你也可以放在其他地方。
第一步： 首先解压缩。
[root@tpwb local]# tar -zxvf jakarta-tomcat-5.0.28.tar.gz
[root@tpwb local]# ls
bin games jakarta-tomcat-5.0.28 lib lost+found sbin src etc include jakarta-tomcat-5.0.28.tar.gz libexec man share
第二步： 设置环境变量 我想到这的话，可能有人会问，为什么要设置环境变量。
提供一个网址，http://www.linuxidc.com/Linux/2009-12/23735.htm
上面说的比较详细： 总体来说就在运行tomact命令是能找到tomcat 的目录，知道它安装到哪了。
下面设置一个两个环境变量CATALINA_HOME和CATALINA_BASE， 编辑~/.bashrc文件。
加入
export CATALINA_BASE=/usr/local/jakarta-tomcat-5.0.28
export CATALINA_HOME=/usr/local/jakarta-tomcat-5.0.28
[root@tpwb local]# cd ~
[root@tpwb ~]# ls -a
. .bash_history .bashrc .gconfd install.log.syslog .. .bash_logout .cshrc .gtkrc .tcshrc anaconda-ks.cfg .bash_profile .gconf install.log .viminfo
[root@tpwb ~]# vi .bashrc
if [ -f /etc/bashrc ];
then . /etc/bashrc fi
export JAVA_HOME=/usr/java/j2sdk1.4.2_04
export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH:$HOMR/bin
export CATALINA_BASE=/usr/local/jakarta-tomcat-5.0.28
export CATALINA_HOME=/usr/local/jakarta-tomcat-5.0.28
vi命令用于编辑文本。wq保存退出. 想了解更详细的命令，可以查看上面推荐网址 如果想设置其他用户的环境变量，方法是一样的。在这里不在说了，我在“linux下安装JDK”文章里已经说的很详细了。 下面来验证一下变量设置是否生效 设置完环境变量最好重起一下，不然看不到效果。
[root@tpwb tp]# reboot
Broadcast message from root (pts/0) (Fri Jan 19 16:51:26 2007): The system is going down for reboot NOW!
我们来查看一下
[root@tpwb ~]# echo $CATALINA_HOME /usr/local/jakarta-tomcat-5.0.28
[root@tpwb ~]# echo $CATALINA_BASE /usr/local/jakarta-tomcat-5.0.28 已经没问题了。
本篇文章来源于 Linux公社网站(www.linuxidc.com)