Let’s create a simple java web app by IntelliJ IDEA community edition, Jetty. There is opportunity to debug the app even by IDEA CE.
Project:
POM.XML
<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>mavenwebapp</groupId>
<artifactId>mavenwebapp</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>mavenwebapp Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-server</artifactId>
<version>9.3.8.v20160314</version>
</dependency>
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-servlet</artifactId>
<version>9.3.8.v20160314</version>
</dependency>
</dependencies>
<build>
<finalName>mavenwebapp</finalName>
<plugins>
<plugin>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>9.3.8.v20160314</version>
<configuration>
<!--<jettyXml>jetty-http.xml</jettyXml>-->
<httpConnector>
<port>8077</port>
</httpConnector>
</configuration>
</plugin>
</plugins>
</build>
</project>
web.xml
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
<display-name>Archetype Created Web Application</display-name>
<welcome-file-list>
<!--<welcome-file>index.jsp</welcome-file>-->
<welcome-file>index.html</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>http_listener1</servlet-name>
<servlet-class>http_listener1</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>http_listener1</servlet-name>
<url-pattern>/http_listener1</url-pattern>
</servlet-mapping>
</web-app>
http_listener1.java
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.jetty.http.HttpMethod;
public class http_listener1 extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
// super.doGet(req, resp);
req.setCharacterEncoding("UTF-8");
resp.setContentType("text/html;charset=UTF-8");
resp.getWriter().println("<!DOCTYPE HTML>");
resp.getWriter().println("<html><body><p>" + "Имя пользователя: " +
(String) req.getParameter("username") + "</p></body></html>");
}
}
main.java
import org.eclipse.jetty.server.*;
import org.eclipse.jetty.servlet.*;
import org.eclipse.jetty.http.HttpStatus;
import java.io.*;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class main {
public static void Main(String[] args) {
Server sever = new Server(7075);
ServletContextHandler handler = new ServletContextHandler(sever, "/example");
handler.addServlet(ExampleServlet.class, "/");
// sever.start();
}
public class ExampleServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
resp.setStatus(HttpStatus.OK_200);
resp.getWriter().println("EmbeddedJetty");
}
}
}
index.html
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Сервлет</title>
</head>
<body>
<form action="http_listener1" method="GET">
<p>Введите имя пользователя: <input type="text" name="username"></p>
<input type="submit" value="Отправить" />
</form>
</body>
</html>
To run or debug use popup menu items
