Jetty Maven Plugin

With the Jetty Maven Plugin, you can test web apps without installing a server.

Create a webapp archetype.

mvn archetype:generate -Dfilter=maven-archetype-webapp

- - - - - - - - -

1: remote -> com.haoxuer.maven.archetype:maven-archetype-webapp (a simple maven archetype)
2: remote -> com.lodsve:lodsve-maven-archetype-webapp (Lodsve Maven Archetype Webapp)
3: remote -> org.apache.maven.archetypes:maven-archetype-webapp (An archetype which contains a sample Maven Webapp project.)
4: remote -> org.bytesizebook.com.guide.boot:maven-archetype-webapp
(An archetype to create the starting code for the first three chapters of Guide to Web Development with Java, 2nd edition.)
Choose a number or apply filter (format: [groupId:]artifactId, case sensitive contains): : 3

- - - - - - - - -

1: 1.0-alpha-1
2: 1.0-alpha-2
3: 1.0-alpha-3
4: 1.0-alpha-4
5: 1.0
6: 1.3
7: 1.4
Choose a number: 7:Just Enter 

- - - - - - - - -

Define value for property 'groupId': : net.java_school.servlet
Define value for property 'artifactId': : initParam
Define value for property 'version':  1.0-SNAPSHOT: : Just Enter
Define value for property 'package':  net.java_school.hello: : Just Enter

Create an initParamServlet.java in the example directory.

cd initParam
mkdir -p src/main/java/example

initParam
  └── src
       └── main
            └── java
                 └── example
                       └── InitParamServlet.java

package example;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class InitParamServlet extends HttpServlet {

  private String url;
  private String user;
  private String passwd;
  private String driver;

  @Override
  public void init() throws ServletException {
    url = this.getInitParameter("url");
    user = this.getInitParameter("user");
    passwd = this.getInitParameter("passwd");
    driver = this.getInitParameter("driver");
  }

  @Override
  public void doGet(HttpServletRequest req, HttpServletResponse resp) 
      throws IOException, ServletException {

    resp.setContentType("text/html; charset=UTF-8");
    PrintWriter out = resp.getWriter();

    out.println("url: " + url + "<br />");
    out.println("user: " + user + "<br />
    out.println("passwd: " + passwd + "<br />
    out.println("driver: " + driver);

  }

}

Modify web.xml as follows.

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
                      http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
  version="4.0">

  <servlet>
    <servlet-name>InitParamServlet</servlet-name>
    <servlet-class>example.InitParamServlet</servlet-class>
    <init-param>
      <param-name>driver</param-name>
      <param-value>oracle.jdbc.driver.OracleDriver</param-value>
    </init-param>
    <init-param>
      <param-name>url</param-name>
      <param-value>jdbc:oracle:thin:@127.0.0.1:1521:XE</param-value>
    </init-param>
    <init-param>
      <param-name>user</param-name>
      <param-value>scott</param-value>
    </init-param>
    <init-param>
      <param-name>passwd</param-name>
      <param-value>tiger</param-value>
    </init-param>
  </servlet>

  <servlet-mapping>
    <servlet-name>InitParamServlet</servlet-name>
    <url-pattern>/initParam</url-pattern>
  </servlet-mapping>

</web-app>

Modify pom.xml as follows.

<?xml version="1.0" encoding="UTF-8"?>
<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>net.java_school.servlet</groupId>
  <artifactId>initParam</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>initParam Maven Webapp</name>
  <url>http://www.java-school.net</url>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>4.0.1</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>javax.servlet.jsp-api</artifactId>
      <version>2.3.3</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>
  </dependencies>

  <build>
    <finalName>initParam</finalName>
    <pluginManagement>
      <plugins>
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.2.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
	<plugin>
          <groupId>org.eclipse.jetty</groupId>
          <artifactId>jetty-maven-plugin</artifactId>
          <version>10.0.2</version>
	</plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

Go to the root directory and run the Jetty server with the following command:

mvn jetty:run

Visit http://localhost:8080/initParam.

If you are using Java 8, modify pom.xml and web.xml by referring to the following.

<!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
<dependency>
  <groupId>javax.servlet</groupId>
  <artifactId>javax.servlet-api</artifactId>
  <version>3.1.0</version>
  <scope>provided</scope>
</dependency>

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
                      http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
  version="4.0">

</web-app>  

• https://mvnrepository.com/artifact/org.eclipse.jetty/jetty-maven-plugin
• https://maven.apache.org/plugins/maven-compiler-plugin/usage.html