Java EE 8 Application Development

Writing our first servlet

In this section, we will develop a simple servlet to illustrate how to use the servlet API. The code for our servlet is as follows:

package net.ensode.javaee8book.simpleapp; 
 
import java.io.IOException; 
import java.io.PrintWriter; 
 
import javax.servlet.http.HttpServlet; 
import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse; 
 
@WebServlet(urlPatterns = {"/simpleservlet"}) 
public class SimpleServlet extends HttpServlet { 
 
    @Override 
    protected void doGet(HttpServletRequest req,     HttpServletResponse res) { try { res.setContentType("text/html"); PrintWriter printWriter = res.getWriter(); printWriter.println("<h2>"); printWriter .println("Hello servlet world!"); printWriter.println("</h2>"); ...