To create a simple Servlet web application using Maven in Eclipse.
In this example, a simple web application is created using Maven in Eclipse. A servlet is created to output a "Hello World~~~" sentance when called.
Maven/Jetty plugin is used for running the application.
Implementation
- Create a Maven Project in Eclipse.
By following the procedures below, an Eclipse project with the followings:
- A Java source folder, /src/main/java;
- A Resource source folder, /src/main/resources;
- A Java source folder for testing, /src/test/java;
- A Resource source folder for testing, /src/test/resources;
- A Web Application source folder, /src/main/webapp;
- A WEB-INF folder, /src/main/webapp/WEB-INF; and
- pom.xml.
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| Figure 1: Created Maven Project |
Procedures
- Select "File"->"Project..." from the menu. In the "New Project" dialog, select "Maven Project". Click the "Next" button.
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| Figure 2: New Maven Project |
- In the "New Project - Select project name and location" dialog, check the option "Create a simple project (skip archetype selection)". Click the "Next" button.
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| Figure 3: New Maven Project - Select project name and location. |
- In the "New Project - Configure Project" dialog, input the Group Id, Artifact Id and Name. Select "war" as the "Packaging". Click the "Next" button. The project will then be created.
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| Figure 4: New Project - Configure Project |
- Update the pom.xml.
- If context is not defined, <artifactId> will be used as the context of the application.
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.blogspot.adaprognotebook</groupId>
<artifactId>helloweb</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>Hello World Webapp</name>
<repositories>
<repository>
<id>java.net2</id>
<name>Repository hosting the Java EE artifacts</name>
<url>http://download.java.net/maven/2</url>
</repository>
<repository>
<id>sonatype-nexus-snapshots</id>
<name>Sonatype Nexus Snapshots for the jetty-maven plugin</name>
<url>https://oss.sonatype.org/content/repositories/snapshots</url>
<releases>
<enabled>false</enabled>
</releases>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-web-api</artifactId>
<version>${javaee.version}</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.mortbay.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>${jetty.version}</version>
<configuration>
<scanIntervalSeconds>30</scanIntervalSeconds>
<stopPort>7788</stopPort>
<stopKey>foo</stopKey>
<webApp>
<descriptor>${basedir}/src/main/webapp/WEB-INF/web.xml</descriptor>
</webApp>
</configuration>
</plugin>
</plugins>
</build>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<javaee.version>6.0</javaee.version>
<jetty.version>8.1.9.v20130131</jetty.version>
</properties>
</project>
- Create the Java Servlet in /src/main/java.
package com.blogspot.adaprognotebook;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class HelloWorld extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
PrintWriter out = resp.getWriter();
out.println("<html>");
out.println("<head>");
out.println("<title>Hello World Servlet</title>");
out.println("</head>");
out.println("<body>");
out.println("<h2>Hello World~~~</h2>");
out.println("</body>");
out.println("</html>");
out.close();
}
}
- Modify web.xml in /src/main/webapp/WEB-INF.
<?xml version="1.0" encoding="UTF-8"?>
<web-app id="HelloWebApp" version="3.0"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
metadata-complete="true">
<servlet>
<display-name>First Hello World Servlet</display-name>
<servlet-name>Hello</servlet-name>
<servlet-class>com.blogspot.adaprognotebook.HelloWorld</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Hello</servlet-name>
<url-pattern>/hello.view</url-pattern>
</servlet-mapping>
</web-app>
- Start Jetty by running a new configuration with goal "jetty:run", and view the web page in browser using URL http://localhost:8080/helloweb/hello.view.
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| Figure 5: Hello World Servlet |
