Running Java Web applications

Java™ servlets and Java server pages (JSPs) are Java programs that run on a Java application server and extend the capabilities of the Web server.

Java servlets are Java classes that are designed to respond to HTTP requests in the context of a Web application.

You can look at JSPs as an extension of HTML that gives you the ability to seamlessly embed snippets of Java code within your HTML pages. These bits of Java code generate dynamic content, which is embedded within the other HTML/XML content. A JSP is translated into a Java servlet and executed on the server. JSP statements embedded in the JSP become part of the servlet generated from the JSP. The resulting servlet is executed on the server.

The HTTP Server does not run Java Web applications directly. HTTP requests for Java applications are forwarded by the HTTP Server to Java application servers. IBM® provides the following Java application servers to run Java applications:

• WebSphere® Application Server

  IBM's strategic Web application server and provides enterprise level support for Java servlets, JSPs, and EJBs (Enterprise Java Beans).

• Integrated Web Application Server

  A lightweight application server for Java applications that is integrated into the IBM i operating system.