使用 java api 寄信

javamail 1.4.4 + java 6 + sendmail

• 系統要裝能寄信的工具

sudo apt-get install sendmail sendmail-bin

• 下載 javamail ; 雖然網站上有寫，但此次不需要 JavaBeans? Activation Framework (JAF)

​http://www.oracle.com/technetwork/java/javamail/index.html

• 解壓縮後，將 javamail.jar 放到 classpath 內

• 測試將 /home/waue/Desktop/index.html 寄到 gmail

• 程式碼

  package tw.org.nchc.icasIII;
  
  import java.io.BufferedReader;
  import java.io.File;
  import java.io.FileReader;
  import java.io.IOException;
  import java.util.Date;
  import java.util.Properties;
  
  import javax.activation.DataHandler;
  import javax.mail.Folder;
  import javax.mail.Message;
  import javax.mail.MessagingException;
  import javax.mail.Session;
  import javax.mail.Store;
  import javax.mail.Transport;
  import javax.mail.URLName;
  import javax.mail.internet.InternetAddress;
  import javax.mail.internet.MimeMessage;
  import javax.mail.util.ByteArrayDataSource;
  
  public class sendhtml {
  
    public static void main(String[] argv) {
      new sendhtml(argv);
    }
  
    public sendhtml(String[] argv) {
  
      String to, subject = null, from = null;
      String cc = null, bcc = null, url = null;
      String mailhost = null;
      String mailer = "sendhtml";
      String protocol = null, host = null, user = null, password = null;
      String record = null; // name of folder in which to record mail
      boolean debug = false;
      int optind;
      
      to = "waue0920@gmail.com";
      subject = "test, javamail";
      from = "waue0920@nchc.org.tw";
      cc = null;
      bcc = null;
      url = null;
      mailhost = "localhost";
      mailer = "sendhtml";
      protocol = null;
      host = null;
      user = null;
      password = null;
      record = null; // name of folder in which to record mail
      
      try {
        BufferedReader in = new BufferedReader(new FileReader(new File("/home/waue/Desktop/index.html")));
        if (subject == null) {
          System.out.print("Subject: ");
          System.out.flush();
          subject = in.readLine();
        } else {
          System.out.println("Subject: " + subject);
        }
  
        Properties props = System.getProperties();
  
        if (mailhost != null)
          props.put("mail.smtp.host", mailhost);
  
        Session session = Session.getInstance(props, null);
        if (debug)
          session.setDebug(true);
  
        // construct the message
        Message msg = new MimeMessage(session);
        if (from != null)
          msg.setFrom(new InternetAddress(from));
        else
          msg.setFrom();
  
        msg.setRecipients(Message.RecipientType.TO,
            InternetAddress.parse(to, false));
        if (cc != null)
          msg.setRecipients(Message.RecipientType.CC,
              InternetAddress.parse(cc, false));
        if (bcc != null)
          msg.setRecipients(Message.RecipientType.BCC,
              InternetAddress.parse(bcc, false));
  
        msg.setSubject(subject);
  
        collect(in, msg);
  
        msg.setHeader("X-Mailer", mailer);
        msg.setSentDate(new Date());
  
        // send the thing off
        Transport.send(msg);
  
        System.out.println("\nMail was sent successfully.");
  
        // Keep a copy, if requested.
  
        if (record != null) {
          // Get a Store object
          Store store = null;
          if (url != null) {
            URLName urln = new URLName(url);
            store = session.getStore(urln);
            store.connect();
          } else {
            if (protocol != null)
              store = session.getStore(protocol);
            else
              store = session.getStore();
  
            // Connect
            if (host != null || user != null || password != null)
              store.connect(host, user, password);
            else
              store.connect();
          }
  
          // Get record Folder. Create if it does not exist.
          Folder folder = store.getFolder(record);
          if (folder == null) {
            System.err.println("Can't get record folder.");
            System.exit(1);
          }
          if (!folder.exists())
            folder.create(Folder.HOLDS_MESSAGES);
  
          Message[] msgs = new Message[1];
          msgs[0] = msg;
          folder.appendMessages(msgs);
  
          System.out.println("Mail was recorded successfully.");
        }
  
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
  
    public void collect(BufferedReader in, Message msg)
        throws MessagingException, IOException {
      String line;
      String subject = msg.getSubject();
      StringBuffer sb = new StringBuffer();
      sb.append("<HTML>\n");
      sb.append("<HEAD>\n");
      sb.append("<TITLE>\n");
      sb.append(subject + "\n");
      sb.append("</TITLE>\n");
      sb.append("</HEAD>\n");
  
      sb.append("<BODY>\n");
      sb.append("<H1>" + subject + "</H1>" + "\n");
  
      while ((line = in.readLine()) != null) {
        sb.append(line);
        sb.append("\n");
      }
  
      sb.append("</BODY>\n");
      sb.append("</HTML>\n");
  
      msg.setDataHandler(new DataHandler(new ByteArrayDataSource(sb
          .toString(), "text/html")));
    }
  }
  
  

• 可以參考 demo 內的範例寫 java 寄信的 code