As the title mentioned, run(with maven2 command or in IDE)/debug(in IDE) java webapp without packaging the war file, installing/configuring any appserver like tomcat or deploying your code to anywhere. The practice will be "compile and run".
Why Jetty?
Jetty is a lightweight, flexible and embeddable Java servlet container. It's so flexible that it can even start servicing a webapp directly from given classpath and a web.xml file without assembling them into a standard webapp.
Step by step
Introduce several dependencies into you pom file. This is required whatsoever if you want to run/debug jetty in IDE and make sure the servlet-api, xercesImpl and java tools.jar(if you want to run JSP) are in dependency list.
<dependency>Create jetty config file PROJECT_BASE_DIR/src/test/config/jetty.xml, assuming the web.xml file is already under src/main/webapp/WEB-INF directory. Feel free to change the directory and port if you want.
<groupId>jetty</groupId>
<artifactId>org.mortbay.jetty</artifactId>
<version>5.1.10</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>jetty</groupId>
<artifactId>jasper-runtime</artifactId>
<version>4.2.20RC0</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>jetty</groupId>
<artifactId>jasper-compiler</artifactId>
<version>4.2.20RC0</version>
<scope>runtime</scope>
</dependency>
<?xml version="1.0" encoding="UTF-8"?>Now, after injecting add dependencies into you IDE(For eclipse, run mvn eclipse:eclipse [-DdownloadSources=true] or use m2eclipse eclipse plugin), you should be able to run/debug the webapp after the code compiles. A java application with org.mortbay.jetty.Server as main class and src/test/config/jetty.xml as argument will start the webapp on port 8081.
<!DOCTYPE Configure PUBLIC "-//Mort Bay Consulting//DTD Configure//EN"
"http://jetty.mortbay.org/configure.dtd">
<Configure class="org.mortbay.jetty.Server">
<Call name="addListener">
<Arg>
<New class="org.mortbay.http.SocketListener">
<Set name="port">
<SystemProperty name="jetty.port" default="8081" />
</Set>
</New>
</Arg>
</Call>
<Call name="addWebApplication">
<Arg>/</Arg>
<Arg>./src/main/webapp</Arg>
</Call>
</Configure>
Jetty6.x required less jar file dependencies, particularly only one jetty jar file if you don't want to run JSP, and syntax of jetty.xml file will be different. Please look at http://www.mortbay.org for more details.
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