MailHandlerServlet.java

package feedback.gusthavo;

import javax.servlet.http.HttpServlet;
import java.io.IOException;
import java.util.Properties;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

  	 
	@SuppressWarnings("serial")
	public class MailHandlerServlet extends HttpServlet {
	 
	    @Override
	    protected void doPost(HttpServletRequest req, HttpServletResponse resp)
	            throws ServletException, IOException {
	        String nome = req.getParameter("nome");
	        
	        String email = req.getParameter("email");
	        String assunto = req.getParameter("assunto");
	        String menssagem = req.getParameter("menssagem");
	        Properties props = new Properties();
	        Session session = Session.getDefaultInstance(props, null);
	 
	        String msgBody = nome + "\n" + email + "\n" + assunto + "\n" + menssagem;
	 
	        try {
	            Message msg = new MimeMessage(session);
	            msg.setFrom(new InternetAddress("gusthavo.souzapereira@gmail.com",
	                    "Gustavo de Souza"));
	            msg.addRecipient(Message.RecipientType.TO, new InternetAddress(
	                    "gusthavo.souzapereira@gmail.com", "Gustavo de Souza"));
	            msg.setSubject("Feedback");
	            msg.setText(msgBody);
	            Transport.send(msg);
	 
	        } catch (Exception e) {
	            resp.setContentType("text/plain");
	            resp.getWriter().println("Something went wrong. Please try again.");
	            throw new RuntimeException(e);
	        }
	 
	        resp.setContentType("text/plain");
	        resp.getWriter().println(
	                "Obrigado pelo Contato.");
	    }
	}