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<td width="90%"><font size="4" face="Verdana, Arial, Helvetica"><b>練習 4. 如何回復郵件</b></font></td><td width="200" align="right"><font size="1" face="Verdana, Arial, Helvetica"><nobr> 第 8 頁（共13 頁）</nobr></font></td>
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<br>
</p>
<font size="2" face="Verdana, Arial, Helvetica">
<p>在這個練習中，我們創建了一個程序，它能夠創建一個固定格式的回復消息，并將純文本的原始消息附加到消息中。</p>
<p>需要更多練習的幫助，請參閱<a href="j-javamail-8-1.html">關于練習</a>。</p>
<p>
<b>先決條件：</b>
<ul>
<li>
<a href="j-javamail-8-6.html">練習 3. 如何檢查郵件</a>
</li>
</ul>
</p>
<p>
<b>框架代碼：</b>
<ul>
<li>
<a href="exercises/MailReply/ReplyExample.java">ReplyExample.java</a>
</li>
</ul>
</p>
<p>
<b>任務 1：</b>
<br>
<a href="exercises/MailReply/ReplyExample.java">框架代碼</a> 中已含有代碼，以便從 folder 中獲取消息清單并提示您創建一條回復消息。</p>
<p>
<b>任務 2：</b>
<br>如果回答“是”，則基于原始消息創建一個新的 <code>MimeMessage</code>。</p>
<blockquote>
<p>
<b>任務 2 的幫助：</b>
<br>
<pre>
<code style="font-family: Courier New, Courier, monospace; font-size: 12">
MimeMessage reply = (MimeMessage)message[i].reply(false);
</code>
</pre>
</p>
</blockquote>
<p>
<b>任務 3：</b>
<br>在您的電子郵件地址上設置 <i>from</i> 域。
</p>
<p>
<b>任務 4：</b>
<br>創建要回復的文本。從引入固定格式的消息開始。若原始消息是純文本，就在原始消息的每行前添加"<code>> </code>" 字符并添加到回復的消息中。
</p>
<blockquote>
<p>
<b>任務 4 的幫助：</b>
<br>對于純文本消息，請用 <code>mimeMessage.isMimeType("text/plain")</code> 檢查 MIME 類型。</p>
</blockquote>
<p>
<b>任務 5：</b>
<br>
一旦消息內容已完全確定，就可以對其進行設置。
</p>
<p>
<b>任務 6：</b>
<br>發送消息。
</p>
<p>
<b>任務 7：</b>
<br>在命令行上編譯并運行程序 — 傳遞郵件服務器、 SMTP 服務器、用戶名、密碼以及 <i>from</i> 地址。對您將回復的消息，響應 YES。反之，敲擊 <code>ENTER</code>。如果想在回復完所有消息前中止，可以輸入 QUIT。
</p>
<blockquote>
<p>
<b>任務 7 的幫助：</b>
<br>
<pre>
<code style="font-family: Courier New, Courier, monospace; font-size: 12">
java ReplyExample POP.Server SMTP.Server username password from@address
</code>
</pre>
</p>
</blockquote>
<p>
<b>任務 8：</b>
<br>
請檢查以確認用標準郵件閱讀程序（Eudora、Outlook Express、pine...）收到了消息。
</p>
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