Sun, 22 Feb 2009 04:00:00 GMT

对于JavaMail�Q�最基础的功能就是邮件的发送和接收�Q�在�q�里�Q�我先讲一讲邮件的发送�?/span>

在写具体的程序前�Q�先讲一些概��c(di��n)�?/span>1.邮�g的发送：(x��)如果你的邮�g地址�?/span>a@host.com�Q�而你要用�q�个邮箱发送一��邮件到to@tohost.com�Q�这个发送过�E�是怎样的呢�Q�你以�ؓ(f��)是先�q�接�?/span>tohost.com�q�服务器上，然后把邮件发送出��d��Q�其实不然。最初，你需要连接到服务�?/span>host.com上，当然�q�个�q�接可能需要认证，然后是发送邮件到服务�?/span>host.com上，关闭�q�接。在host.com上，你所发送的邮�g�q�入发送队列中�Q�轮��C��要发送的邮�g�Ӟ��host.com��L��再联�p?/span>tohost.com�Q�将邮�g传输到服务器tohost.com上�?/span>2.一些垃��N��件的发送：(x��)在垃��N��件中�Q�可能大部分的发件�h的地址都是假的�Q�这是怎么回事呢？实际上在发送这些垃��N��件的时候，�q�里�?/span>host.com有些特别�Q�可�?/span>host.com不需要对用户�q�行认证�Q�也可能发送垃��N��件的人本来就控制着服务�?/span>host.com�Q�然后控制着host.com向其他服务器�Q�如tohost.com�Q�发送邮�Ӟ��而发送邮件的内容可以被控�Ӟ��发�g人的地址��可以随便填写�?/span>

发送邮件主要包�?/span>3个部分：(x��)创徏�q�接�Q�创建邮件体�Q�发送邮�?/span>

JavaMail中，是��用会(x��)�?/span>(Session)来管理连接的。创��Z��个连接，��需要创��Z��个会(x��)话。在�?x��)话中，有两个重要的因素�Q�一是会(x��)话的属性，二是�?x��)话的认证。在我们使用Hotmail�{�邮件工��L(f��ng)��时候，��p��讄��”SMTP服务器��n份验�?/span>”�Q�也��是�q�里的会(x��)话的认证�?/span>

首先�Q�创��Z��个连接属性�?/font>

Properties props = new Properties();

props.put("mail.smtp.host","smtp.126.com"); //讄��smtp的服务器地址�?/span>smtp.126.com

props.put("mail.smtp.auth","true"); //讄��smtp服务器要?l��i)w�䆾验证�?/span>

在创��Z��个��n份验证。��n份验证稍微复杂一点，要创��Z��?/span>Authenticator的子�c�，�q��?/span>getPasswordAuthentication�Q�）(j��)�Ҏ(gu��)��,代码如下�Q?/span>

class PopupAuthenticator extends Authenticator {

public PasswordAuthentication getPasswordAuthentication() {

String username = "cqhcp"; //126邮箱��d��帐号

String pwd = "12345"; //��d��密码

return new PasswordAuthentication(username, pwd);

}

创徏�w�䆾验证的实�?/span>:

PopupAuthenticator auth = new PopupAuthenticator();

创徏�?x��)�?/span>: 关于�?x��)话的创建，有两�U�方法，具体请参看后�l�的文章,�q�里只简单��用一�U��?/span>

Session session = Session.getInstance(props, auth);

定义邮�g地址:

//发送�h地址

Address addressFrom = new InternetAddress("cqhcp@126.com", "George Bush");

//收�g人地址

Address addressTo = new InternetAddress("webmaster@javazy.com", "George Bush");

//抄送地址

Address addressCopy = new InternetAddress("haocongping@gmail.com", "George Bush");

创徏邮�g�?/span>:

message.setContent("Hello", "text/plain");//或者��?/span>message.setText("Hello");更详�l�的信息请参看后�l�文�?/span>.

message.setSubject("Title");

message.setFrom(addressFrom);

message.addRecipient(Message.RecipientType.TO,addressTo);

message.addRecipient(Message.RecipientType.CC,addressCopy);

message.saveChanges();

发送邮件的�q�程:

Transport transport = session.getTransport("smtp");//创徏�q�接

transport.connect("smtp.126.com", "cqhcp", "12345");//�q�接服务�?/span>

transport.send(message);//发送信�?/span>

transport.close();//关闭�q�接

整体�E�序的代码如�?/span>:

class PopupAuthenticator extends Authenticator {

public PasswordAuthentication getPasswordAuthentication() {

String username = "cqhcp"; //163邮箱��d��帐号

String pwd = "12345"; //��d��密码

return new PasswordAuthentication(username, pwd);

}

Properties props = new Properties();

props.put("mail.smtp.host","smtp.126.com");

props.put("mail.smtp.auth","true");

PopupAuthenticator auth = new PopupAuthenticator();

Session session = Session.getInstance(props, auth);

MimeMessage message = new MimeMessage(session);

Address addressFrom = new InternetAddress("cqhcp@126.com", "George Bush");

Address addressTo = new InternetAddress("webmaster@javazy.com", "George Bush");

Address addressCopy = new InternetAddress("haocongping@gmail.com", "George Bush");

message.setContent("Hello", "text/plain");//或者��?/span>message.setText("Hello");

message.setSubject("Title");

message.setFrom(addressFrom);

message.addRecipient(Message.RecipientType.TO,addressTo);

message.addRecipient(Message.RecipientType.CC,addressCopy);

message.saveChanges();

Transport transport = session.getTransport("smtp");

transport.connect("smtp.126.com", "cqhcp", "12345");

transport.send(message);

transport.close();

J2EE Home工作�?/a> 2009-02-22 12:00 发表评论

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