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<td width="90%"><font size="4" face="Verdana, Arial, Helvetica"><b>Address</b></font></td><td width="200" align="right"><font size="1" face="Verdana, Arial, Helvetica"><nobr>   第 4 頁（共8 頁）</nobr></font></td>
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<p>一旦您創(chuàng)建了 <code>Session</code> 和 <code>Message</code>，并將內(nèi)容填入消息后，就可以用<code> <a href="http://java.sun.com/products/javamail/javadocs/javax/mail/Address.html">Address</a></code> 確定信件地址了。和 <code>Message</code> 一樣，<code>Address</code> 也是個抽象類。您用的是 <code> <a href="http://java.sun.com/products/javamail/javadocs/javax/mail/internet/InternetAddress.html">javax.mail.internet.InternetAddress</a></code> 類。</p>
<p>若創(chuàng)建的地址只包含電子郵件地址，只要傳遞電子郵件地址到構(gòu)造器就行了。</p>
<pre>
<code style="font-family: Courier New, Courier, monospace; font-size: 12">
Address address = new InternetAddress("president@whitehouse.gov");
</code>
</pre>
<p>若希望名字緊挨著電子郵件顯示，也可以把它傳遞給構(gòu)造器：</p>
<pre>
<code style="font-family: Courier New, Courier, monospace; font-size: 12">
Address address = new InternetAddress("president@whitehouse.gov", "George Bush");
</code>
</pre>
<p>需要為消息的 <i>from</i> 域和 <i>to</i> 域創(chuàng)建地址對象。除非郵件服務(wù)器阻止，沒什么能阻止你發(fā)送一段看上去是來自任何人的消息。</p>
<p>一旦創(chuàng)建了 address（地址），將它們與消息連接的方法有兩種。如果要識別發(fā)件人，您可以用 <code>setFrom()</code> 和 <code>setReplyTo()</code> 方法。</p>
<pre>
<code style="font-family: Courier New, Courier, monospace; font-size: 12">
message.setFrom(address)
</code>
</pre>
<p>需要消息顯示多個 <i>from</i> 地址，可以使用 <code>addFrom()</code> 方法：</p>
<pre>
<code style="font-family: Courier New, Courier, monospace; font-size: 12">
Address address[] = ...;
message.addFrom(address);
</code>
</pre>
<p>若要識別消息 recipient（收件人），您可以使用 <code>addRecipient()</code> 方法。除 address（地址）外，這一方法還請求一個 <code><a href="http://java.sun.com/products/javamail/javadocs/javax/mail/Message.RecipientType.html">Message.RecipientType</a></code>。</p>
<pre>
<code style="font-family: Courier New, Courier, monospace; font-size: 12">
message.addRecipient(type, address)
</code>
</pre>
<p>三種預(yù)定義的地址類型是：</p>
<ul>
<li>Message.RecipientType.TO</li>
<li>Message.RecipientType.CC</li>
<li>Message.RecipientType.BCC</li>
</ul>
<p>如果消息是發(fā)給副總統(tǒng)的，同時(shí)發(fā)送一個副本(carbon copy)給總統(tǒng)夫人，以下做法比較恰當(dāng)：</p>
<pre>
<code style="font-family: Courier New, Courier, monospace; font-size: 12">
Address toAddress = new InternetAddress("vice.president@whitehouse.gov");
Address ccAddress = new InternetAddress("first.lady@whitehouse.gov");
message.addRecipient(Message.RecipientType.TO, toAddress);
message.addRecipient(Message.RecipientType.CC, ccAddress);
</code>
</pre>
<p>JavaMail API 沒有提供電子郵件地址有效性核查機(jī)制。雖然通過編程，自己能夠掃描有效字符（如 RFC 822 中定義的）或驗(yàn)證郵件交換（mail exchange，MX）記錄，但這些功能不屬于 JavaMail API。</p>
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