Download Apache Struts 2, Java SE Development Kit, Apache Tomcat

Java environment
The first piece of software you have to install is a Java environment. In this
tutorial, we will use Sun's JavaTM2 Software Development Kit (SDK), but you can
use Java SDK provided by other manufacturers as well.
Here are the steps to install your Java environment Java SE Development Kit
1. download page.
2. Download a SDK
Setting Up Your Java Environment
After installing the Java SDK your only remaining task is to set the value
for JAVA_HOME and update the PATH environment variable.
JAVA_HOME must point to the directory where you installed the SDK and PATH must
point to the bin subdirectory of the SDK. Here are examples for the Unix and
Windows platforms:
Unix platforms

Assuming that you installed the SDK in the /usr/local/jdk1.3.1 directory,
you should enter the following:
bash>export JAVA_HOME=/usr/local/jdk1.3.1

or
tcsh>setenv JAVA_HOME /usr/local/jdk1.3.1

You then have to update your PATH variable by
appending /usr/local/jdk1.3.1/bin. If JAVA_HOME has been properly set,
you can proceed as follows:
bash>export PATH=${PATH}:${JAVA_HOME}/bin

or
tcsh>setenv PATH ${PATH}:${JAVA_HOME}/bin
Environment variables must be correctly set at all times. It is common practice to insert
these commands in your shell start file (.bashrc, .cshrc, ...).
Windows platforms

Assuming that you installed the SDK in the C:\jdk1.3.1 directory, you can
issue the following command:
C:>set JAVA_HOME=C:\jdk1.3.1

You then have to update your PATH variable by
appending C:\jdk1.3.1\bin. If JAVA_HOME has been properly set, you can
enter the following:
C:>set PATH=%PATH%;%JAVA_HOME%\bin

To update the path permanently, do the following depending upon your
Windows version:

Windows 95 or 98

You must insert this command in the AUTOEXEC.BAT file.

Windows Me

Go to the Start Menu, then choose Programs, Accessories, System
Tools and System Information. A window titled "Microsoft Help and
Support" should appear. Select the Tools menu, and choose the System
Configuration Utility. Go to the Environment tab where you can edit
the PATH variable. Append the value ;C:\jdk1.3.1\bin. Once you have
changed and saved the value, you will be prompted to reboot.

Windows NT

Go to the Start Menu, then choose Settings, Control Panel and
select System. Select the Environment tab and look User
Variables and System Variables for PATH. Then edit the value and append
the value ;C:\jdk1.3.1\bin.

Windows 2000

Go to the Start Menu, then choose Settings, Control Panel and select
the System icon. Select the Advanced tab and then click on the Environment
Variables button and then edit the System Variables entries for PATH by
appending ;C:\jdk1.3.1\bin.

Windows XP

Go to the Start Menu, then double click on System. In the System Control
Panel select the Advanced tab and push the Environment
Variables button. Now, you can look for the PATH to edit. Append the
value ;C:\jdk1.3.1\bin. Once you have changed and saved the value, you
will be prompted to reboot.