This tutorial shows how you can develop code against the Jetty API with the jetty classes on your class path. If you want to use Maven or standard web applications, see Jetty and Maven HelloWorld.
Jetty is decomposed into many [[Jetty/Reference/Dependencies|jars and dependencies]] //TODO xref//to achieve a minimal footprint by selecting the minimal set of jars. Typically it is best to use something like Maven to manage jars this tutorial uses an aggregate Jar that contains all of the Jjetty classes in one Jar.
You can manually download the jetty aggregate-all Jar and the servlet api Jar using wget or similar command (for example, curl ) or a browser. Use wget as follows:
mkdir Demo cd Demo JETTY_VERSION=7.0.2.v20100331 wget -U none http://repo1.maven.org/maven2/org/eclipse/jetty/aggregate/jetty-all/$JETTY_VERSION/jetty-all-$JETTY_VERSION.jar wget -U none http://repo1.maven.org/maven2/javax/servlet/servlet-api/2.5/servlet-api-2.5.jar
The ??? tutorial contains many examples of writing against the
Jetty API. This tutorial uses a simple HelloWorld handler with a main method to run the server. In an editor, edit
the file HelloWorld.java
and add the following content:
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.ServletException;
import java.io.IOException;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.Request;
import org.eclipse.jetty.server.handler.AbstractHandler;
public class HelloWorld extends AbstractHandler
{
public void handle(String target,
Request baseRequest,
HttpServletRequest request,
HttpServletResponse response)
throws IOException, ServletException
{
response.setContentType("text/html;charset=utf-8");
response.setStatus(HttpServletResponse.SC_OK);
baseRequest.setHandled(true);
response.getWriter().println("<h1>Hello World</h1>");
}
public static void main(String[] args) throws Exception
{
Server server = new Server(8080);
server.setHandler(new HelloWorld());
server.start();
server.join();
}
}
The following command compiles the HelloWorld class:
javac -cp servlet-api-2.5.jar:jetty-all-$JETTY_VERSION.jar HelloWorld.java
The following command runs the HelloWorld example:
java -cp .:servlet-api-2.5.jar:jetty-all-$JETTY_VERSION.jar HelloWorld
You can now point your browser at <nowiki>http://localhost:8080</nowiki>to see your hello world page.
To learn more about Jetty, take these next steps: