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📁 javamail1.3的详细API说明
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<td width="90%"><font size="4" face="Verdana, Arial, Helvetica"><b>消息的提取</b></font></td><td width="200" align="right"><font size="1" face="Verdana, Arial, Helvetica"><nobr>   第 3 页（共9 页）</nobr></font></td>
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<p>为读邮件，您获取一个会话，获取并连接一个用于邮箱的适宜的存储（store），打开适宜的文件夹，然后获取您的消息。同样，切记完成后关闭连接。</p>
<pre>
<code style="font-family: Courier New, Courier, monospace; font-size: 12">
  String host = ...;
  String username = ...;
  String password = ...;

  // Create empty properties
  Properties props = new Properties();

  // Get session
  Session session = Session.getDefaultInstance(props, null);

  // Get the store
  Store store = session.getStore("pop3");
  store.connect(host, username, password);

  // Get folder
  Folder folder = store.getFolder("INBOX");
  folder.open(Folder.READ_ONLY);

  // Get directory
  Message message[] = folder.getMessages();

  for (int i=0, n=message.length; i&lt;n; i++) {
     System.out.println(i + ": " + message[i].getFrom()[0]
          + "\t" + message[i].getSubject());
          }

          // Close connection
          folder.close(false);
          store.close();
</code>
</pre>
<p>对每条消息做些什么由您决定。上面的代码块只是显示这些消息的发件人和主题。技术上讲，<i>from</i> 地址列表可能为空，而 <code>getFrom()[0]</code> 调用会抛出一个异常。</p>
<p>要显示全部信息，您可以在用户看完 from 和 subject 域之后给出提示，如用户有需要，就调用消息的
<code>writeTo()</code> 方法来实现。</p>
<pre>
<code style="font-family: Courier New, Courier, monospace; font-size: 12">
          BufferedReader reader = new BufferedReader (
            new InputStreamReader(System.in));

          // Get directory
          Message message[] = folder.getMessages();
          for (int i=0, n=message.length; i&lt;n; i++) {
            System.out.println(i + ": " + message[i].getFrom()[0]
              + "\t" + message[i].getSubject());

            System.out.println("Do you want to read message? " +
              "[YES to read/QUIT to end]");
            String line = reader.readLine();
            if ("YES".equals(line)) {
              message[i].writeTo(System.out);
            } else if ("QUIT".equals(line)) {
              break;
            }
          }
</code>
</pre>
<p>
<b>练习：</b>

<br>
<a href="j-javamail-8-6.html">练习 3. 如何检查邮件</a>
</p>
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