サーブレット参考

http://qiita.com/yoh-nak/items/bff51637fa4f558b37ac
http://qiita.com/rubytomato@github/items/b106ff8011bcad60bce2#%E6%BA%96%E5%82%99

SMTP参考

ダウンロードURL

JavaMail

FakeSMTP

Servlet

SendMail.java

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Properties;

import javax.mail.Message;
import javax.mail.PasswordAuthentication;
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.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class SendInquiry
 */
@WebServlet("/SendMail")
public class SendMail extends HttpServlet {
    private static final long serialVersionUID = 1L;


    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("UTF-8");

        String title = request.getParameter("title");
        String message = request.getParameter("message");

        response.setContentType("text/html; charset=UTF-8");

        PrintWriter out = response.getWriter();

        try{
            Properties property = new Properties();

            //GmailのSMTPを使う場合
//            String host = "smtp.gmail.com";
//            String port = "587";
//            String starttls = "true";

            //一般的なSMTPを使う場合
            //ポートが25の場合は省略可能    
            String host = "localhost";
            String port = "25";
            String starttls = "false";

            property.put("mail.smtp.auth", "true");
            property.put("mail.smtp.debug", "true");
            property.put("mail.smtp.starttls.enable", starttls);
            property.put("mail.smtp.host", host);
            property.put("mail.smtp.port", port);

            Session session = Session.getInstance(property, new javax.mail.Authenticator(){
                protected PasswordAuthentication getPasswordAuthentication(){
                    return new PasswordAuthentication("Gmailの場合はユーザ名", "Gmailの場合はパスワード");
                }
            });


            MimeMessage mimeMessage = new MimeMessage(session);

            InternetAddress toAddress = 
                    new InternetAddress("★送信先アドレス★","★送信先名★");

            mimeMessage.setRecipient(Message.RecipientType.TO, toAddress);

            InternetAddress fromAddress = 
                    new InternetAddress("★送信元アドレス★","★送信元名★");

            mimeMessage.setFrom(fromAddress);

            mimeMessage.setSubject(title, "ISO-2022-JP");

            mimeMessage.setText(message, "ISO-2022-JP");

            Transport.send(mimeMessage);

            out.println("<htm><body>");
            out.println("■お問い合わせ内容を担当者へ送信しました。");
            out.println("<body></html>");
        }
        catch(Exception e){
            out.println("<html><body>");
            out.println("■担当者への送信に失敗しました");
            out.println("<br>エラーの内容" + e);
            out.println("</body></html>");
        }

        out.close();
    }

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doGet(request,response);

    }

}

JSP

mailForm.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>メール送信</title>
</head>
<body>
<h1>メール送信</h1>
<form action="SendMail" method="post">
    タイトル<br>
    <input type="text" name="title" size="20"><br>
    本文<br>
    <textarea name="message" rows="20" cols="40"></textarea><br>
    <input type="submit" value="送信"><input type="reset" value="リセット">
</form>
</body>
</html>

JavaMailメモ

サーブレット参考

SMTP参考

ダウンロードURL

JavaMail

FakeSMTP

Servlet

JSP