发布于 2016-10-29 23:16:18 | 151 次阅读 | 评论: 0 | 来源: PHPERZ
在本章中,我们将看到如何使用JavaMail API来回复电子邮件。接着在下面的程序中的列出基本步骤:
获取Session对象与POP和SMTP 服务器的细节属性。我们需要 POP 细节来检索信息和SMPT详细信息发送邮件。
创建POP3存储对象,并连接到存储。
创建文件夹对象,并在您的邮箱中打开相应的文件夹。
检索消息。
遍历的消息,如果你想回复键入“Y”或“y”。
得到消息的所有信息(收件人,发件人,主题,内容)(To,From,Subject, Content) 。
建立应答消息,使用Message.reply()方法。这个方法配置一个新的消息与适当的收件人和主题。该方法接受一个布尔参数,指示是否只回复给发送者 (false)或回复给所有人(true)。
从设置,文本和回复到邮件中,并通过传输对象的实例发送。
关闭传输,文件夹和存储对象分别。
在这里,我们使用JangoSMPT服务器通过该电子邮件发送到我们的目标电子邮件地址。设置是在环境设置章节解释。
创建一个Java类文件ReplyToEmail,是其内容如下:
package com.yiibai; import java.io.BufferedReader; import java.io.InputStreamReader; import java.util.Date; import java.util.Properties; import javax.mail.Folder; import javax.mail.Message; import javax.mail.Session; import javax.mail.Store; import javax.mail.Transport; import javax.mail.internet.InternetAddress; import javax.mail.internet.MimeMessage; public class ReplyToEmail { public static void main(String args[]) { Date date = null; Properties properties = new Properties(); properties.put("mail.store.protocol", "pop3"); properties.put("mail.pop3s.host", "pop.gmail.com"); properties.put("mail.pop3s.port", "995"); properties.put("mail.pop3.starttls.enable", "true"); properties.put("mail.smtp.auth", "true"); properties.put("mail.smtp.starttls.enable", "true"); properties.put("mail.smtp.host", "relay.jangosmtp.net"); properties.put("mail.smtp.port", "25"); Session session = Session.getDefaultInstance(properties); // session.setDebug(true); try { // Get a Store object and connect to the current host Store store = session.getStore("pop3s"); store.connect("pop.gmail.com", "xyz@gmail.com", "*****");//change the user and password accordingly Folder folder = store.getFolder("inbox"); if (!folder.exists()) { System.out.println("inbox not found"); System.exit(0); } folder.open(Folder.READ_ONLY); BufferedReader reader = new BufferedReader(new InputStreamReader( System.in)); Message[] messages = folder.getMessages(); if (messages.length != 0) { for (int i = 0, n = messages.length; i < n; i++) { Message message = messages[i]; date = message.getSentDate(); // Get all the information from the message String from = InternetAddress.toString(message.getFrom()); if (from != null) { System.out.println("From: " + from); } String replyTo = InternetAddress.toString(message .getReplyTo()); if (replyTo != null) { System.out.println("Reply-to: " + replyTo); } String to = InternetAddress.toString(message .getRecipients(Message.RecipientType.TO)); if (to != null) { System.out.println("To: " + to); } String subject = message.getSubject(); if (subject != null) { System.out.println("Subject: " + subject); } Date sent = message.getSentDate(); if (sent != null) { System.out.println("Sent: " + sent); } System.out.print("Do you want to reply [y/n] : "); String ans = reader.readLine(); if ("Y".equals(ans) || "y".equals(ans)) { Message replyMessage = new MimeMessage(session); replyMessage = (MimeMessage) message.reply(false); replyMessage.setFrom(new InternetAddress(to)); replyMessage.setText("Thanks"); replyMessage.setReplyTo(message.getReplyTo()); // Send the message by authenticating the SMTP server // Create a Transport instance and call the sendMessage Transport t = session.getTransport("smtp"); try { //connect to the smpt server using transport instance //change the user and password accordingly t.connect("abc", "****"); t.sendMessage(replyMessage, replyMessage.getAllRecipients()); } finally { t.close(); } System.out.println("message replied successfully ...."); // close the store and folder objects folder.close(false); store.close(); } else if ("n".equals(ans)) { break; } }//end of for loop } else { System.out.println("There is no msg...."); } } catch (Exception e) { e.printStackTrace(); } } }
您可以通过取消注释语句上设置调试 session.setDebug(true);
现在,我们班是准备好了,让我们编译上面的类。我已经保存了类ReplyToEmail.java到目录: /home/manisha/JavaMailAPIExercise. 我们需要 javax.mail.jar andactivation.jar 在 classpath 中。执行下面的命令从命令提示符编译类(两个罐子被放置在 /home/manisha/ 目录下):
javac -cp /home/manisha/activation.jar:/home/manisha/javax.mail.jar: ReplyToEmail.java
现在,这个类被编译,执行下面的命令来运行:
java -cp /home/manisha/activation.jar:/home/manisha/javax.mail.jar: ReplyToEmail
你应该看到下面的消息命令控制台上:
From: ABC <abc@gmail.com> Reply-to: abc@trioteksolutions.com To: XYZ <xyz@gmail.com> Subject: Hi today is a nice day Sent: Thu Oct 17 15:58:37 IST 2013 Do you want to reply [y/n] : y message replied successfully ....
检查该邮件发送的收件箱。在我们的例子中收到的邮件看起来如下: