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    在jsp中发送email
    在jsp中发送email

    一、我们可以通过任何支持sun规范中的sun.net.smtp包的JSP引擎(如JSWDK)发送mail。
    (警告:使用内置的internal Sun规范包,这将影响到你的jsp程序的可移植性。)

    以下scriptlet利用SmtpClient类在jsp文件中发送email。





    二、 JavaMail是官方的 Java mail API,可参考 http://java.sun.com/products/javamail/。虽然该API比 sun.net.smtp.SmtpClient更丰富或者说更复杂,但它是可移植的。这里重新创建了一个 MailSender类,它包含了 JavaMail API。如下所示:


    // ms_ prefix is for MailSender class variables
    // str prefix is for String
    // astr prefix is for array of Strings
    // strbuf prefix is for StringBuffers, etc.
    public MailSender(
    String strFrom, // sender
    String[] astrTo, // recipient(s)
    String[] astrBCC, // bcc recipient(s), optional
    String strSubject, // subject
    boolean debugging)
    {
    ms_strFrom = strFrom; // who the message is from
    ms_astrTo = astrTo; // who (plural) the message is to
    ms_debugging = debugging; // who (plural) the message is to

    // set the host
    Properties props = new Properties();
    props.put(\&;mail.smtp.host\&;, ms_strSMTPHost);

    // create some properties and get the default Session
    Session session = Session.getDefaultInstance(props, null);
    session.setDebug(ms_debugging);

    try {
    // create a message
    ms_msg = new MimeMessage(session);

    // set the from
    InternetAddress from = new InternetAddress(strFrom);
    ms_msg.setFrom(from);

    // set the to
    InternetAddress[] address = new InternetAddress[astrTo.length];
    for (int i = 0; i astrTo.length; ++i)
    {
    address[i] = new InternetAddress(astrTo[i]);
    }
    ms_msg.setRecipients(Message.RecipientType.TO, address);

    // set the bcc recipients
    if (astrBCC != null)
    {
    address = new InternetAddress[astrBCC.length];
    for (int i = 0; i astrBCC.length; ++i)
    {
    eh.dbg(\&;astrBCC[\&; + i + \&;] is: \'&; + astrBCC[i] + &;'\&;);
    address[i] = new InternetAddress(astrBCC[i]);
    }
    ms_msg.setRecipients(Message.RecipientType.BCC, address);
    }

    // set the subject
    ms_msg.setSubject(strSubject);

    // set up the string buffer which will hold the message
    ms_strbufMsg = new StringBuffer();

    } catch (MessagingException mex) {
    mex.printStackTrace(System.err);
    } catch (Exception ex) {
    ex.printStackTrace(System.err);
    }
    }

    public void ms_add(String strText)
    {
    ms_strbufMsg.append(strText);
    }

    public void ms_send()
    {
    try {
    // set the content as plain text
    ms_msg.setContent(new String(ms_strbufMsg), \&;text/plain\&;);

    // and away
    Transport.send(ms_msg);
    } catch (Exception ex) {
    System.out.println(\&;Caught exception in MailSender.ms_send: \&; + ex);
    }
    }

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