JavaMail邮件发送-将邮件封存到本地和发送一封本地邮件
JavaMail邮件发送-将邮件保存到本地和发送一封本地邮件
一般是这样的,我们可能不会要求马上发送这封邮件,为了减少服务器压力和带宽压力,我们一般是在空闲时在发送,或者用户指定时间才发送
那么就要先把邮件进行保存,然后按时发送
可以将信息保存到数据库,然后获取后再组装邮件信息,这里我们就把邮件打成一个文件保存在本地
保存到本地很简单,只要之前你的示例都能跑通,只差一步
- package com.mail;
- import java.io.File;
- import java.io.FileOutputStream;
- import java.io.OutputStream;
- import java.util.Date;
- import java.util.Properties;
- import javax.mail.Message;
- import javax.mail.Session;
- import javax.mail.internet.InternetAddress;
- import javax.mail.internet.MimeMessage;
- import javax.mail.internet.MimeUtility;
- /**
- * @说明 保存一个邮件
- * @author cuisuqiang
- * @version 1.0
- * @since
- */
- public class TextMail {
- public static void main(String[] args) throws Exception {
- Properties props = new Properties();
- props.put( "mail.smtp.host ", "smtp.163.com ");
- props.put("mail.smtp.port", 25);
- props.put("mail.smtp.auth", "true");
- Session session = Session.getInstance(props);
- session.setDebug(true);
- Message message = new MimeMessage(session);
- InternetAddress from = new InternetAddress("test20120711120200@163.com");
- from.setPersonal(MimeUtility.encodeText("java小强<test20120711120200@163.com>"));
- message.setFrom(from);
- InternetAddress to = new InternetAddress("test20120711120200@163.com");
- message.setRecipient(Message.RecipientType.TO, to);
- message.setSubject(MimeUtility.encodeText("强哥邀请,谁敢不从!"));
- message.setText("强哥邀请你访问我的博客:http://cuisuqiang.iteye.com/!");
- message.setSentDate(new Date());
- // 邮件对象
- File file = new File("C:\\textmail.eml");
- // 获得输出流
- OutputStream ips = new FileOutputStream(file);
- // 把邮件内容写入到文件
- message.writeTo(ips);
- // 关闭流
- ips.close();
- System.out.println("发送完毕");
- }
- }
package com.mail; import java.io.File; import java.io.FileOutputStream; import java.io.OutputStream; import java.util.Date; import java.util.Properties; import javax.mail.Message; import javax.mail.Session; import javax.mail.internet.InternetAddress; import javax.mail.internet.MimeMessage; import javax.mail.internet.MimeUtility; /** * @说明 保存一个邮件 * @author cuisuqiang * @version 1.0 * @since */ public class TextMail { public static void main(String[] args) throws Exception { Properties props = new Properties(); props.put( "mail.smtp.host ", "smtp.163.com "); props.put("mail.smtp.port", 25); props.put("mail.smtp.auth", "true"); Session session = Session.getInstance(props); session.setDebug(true); Message message = new MimeMessage(session); InternetAddress from = new InternetAddress("test20120711120200@163.com"); from.setPersonal(MimeUtility.encodeText("java小强<test20120711120200@163.com>")); message.setFrom(from); InternetAddress to = new InternetAddress("test20120711120200@163.com"); message.setRecipient(Message.RecipientType.TO, to); message.setSubject(MimeUtility.encodeText("强哥邀请,谁敢不从!")); message.setText("强哥邀请你访问我的博客:http://cuisuqiang.iteye.com/!"); message.setSentDate(new Date()); // 邮件对象 File file = new File("C:\\textmail.eml"); // 获得输出流 OutputStream ips = new FileOutputStream(file); // 把邮件内容写入到文件 message.writeTo(ips); // 关闭流 ips.close(); System.out.println("发送完毕"); } }
邮件对象创建后没有立即发送,而是保存到了一个文件中
那么如何发送一封已经存在的邮件呢?也很简单,只是邮件对象的创建的方式不一样了而已
- package com.mail;
- import java.io.File;
- import java.io.FileInputStream;
- import java.util.Date;
- import java.util.Properties;
- import javax.mail.Message;
- import javax.mail.Session;
- import javax.mail.Transport;
- import javax.mail.internet.MimeMessage;
- /**
- * 放松一封现有邮件
- * @author cuisuqiang@163.com
- */
- public class SendCurrentMail {
- public static void main(String[] args) throws Exception {
- Properties props = new Properties();
- props.put("mail.smtp.auth", "true");
- Session session = Session.getInstance(props);
- // 现有邮件文件
- File file = new File("C:\\textmail.eml");
- FileInputStream fis = new FileInputStream(file);
- // 创建邮件对象
- Message message = new MimeMessage(session, fis);
- message.setSentDate(new Date());
- message.saveChanges();
- // 发送邮件
- Transport transport = session.getTransport("smtp");
- transport.connect("smtp.163.com", 25, "test20120711120200", "test123456");
- transport.sendMessage(message, message.getAllRecipients());
- transport.close();
- fis.close();
- System.out.println("发送完毕");
- }
- }
package com.mail; import java.io.File; import java.io.FileInputStream; import java.util.Date; import java.util.Properties; import javax.mail.Message; import javax.mail.Session; import javax.mail.Transport; import javax.mail.internet.MimeMessage; /** * 放松一封现有邮件 * @author cuisuqiang@163.com */ public class SendCurrentMail { public static void main(String[] args) throws Exception { Properties props = new Properties(); props.put("mail.smtp.auth", "true"); Session session = Session.getInstance(props); // 现有邮件文件 File file = new File("C:\\textmail.eml"); FileInputStream fis = new FileInputStream(file); // 创建邮件对象 Message message = new MimeMessage(session, fis); message.setSentDate(new Date()); message.saveChanges(); // 发送邮件 Transport transport = session.getTransport("smtp"); transport.connect("smtp.163.com", 25, "test20120711120200", "test123456"); transport.sendMessage(message, message.getAllRecipients()); transport.close(); fis.close(); System.out.println("发送完毕"); } }
当然,具体业务中的应用肯定要增加许多判断的,特别是设计到了文件的操作,我这里就不再一一的解说了!
最后:
由于近期大量小网站在未经同意情况下使用文章,现将我的博客地址公布如下,请您到ITEYE网站看原创,谢谢!
http://cuisuqiang.iteye.com/ !