Prentice Hall and Sun Microsystems. Personal use only; do not redistribute.

28

Chapter 2 First Servlets

Figure 2 2

Result of Listing 2.3 (HelloWWW.java).

and the way they're invoked. Let's take these areas one at a time in the follow 

ing three subsections. The first two changes are exactly the same as with any

other Java class that uses packages; there is nothing specific to servlets.

Creating Servlets in Packages

Two steps are needed to place servlets in packages:

1. Move the files to a subdirectory that matches the 

intended package name.

For example, I'll use the 

coreservlets

 package for most of the 

rest of the servlets in this book. So, the class files need to go in a 

subdirectory called 

coreservlets

.

2. Insert a package statement in the class file.

For example, to place a class file in a package called 

somePack 

age

, the first line of the file should read

package somePackage;

For example, Listing 2.4 presents a variation of the 

HelloWWW

servlet that is in the 

coreservlets

 package. The class file goes in

install_dir/webpages/WEB INF/classes/coreservlets

 for Tomcat

3.0, in 

install_dir/webpages/WEB INF/servlets/coreservlets

 for

the JSWDK 1.0.1, and in 

install_dir/servlets/coreservlets

 for the

Java Web Server 2.0. 

Second edition of this book: www.coreservlets.com; Sequel: www.moreservlets.com.

Servlet and JSP training courses by book's author: courses.coreservlets.com.