使用Spring的JAVAMail支持简化邮件发送功能

public class SpringMailSender
 {
 
 //
 Spring的邮件工具类，实现了MailSender和JavaMailSender接口
 private JavaMailSenderImpl
 mailSender;
  
 public SpringMailSender()
 {
 //
 初始化JavaMailSenderImpl，当然推荐在spring配置文件中配置，这里是为了简单
 mailSender
 = new JavaMailSenderImpl();
 //
 设置参数
 mailSender.setHost("smtp.qq.com");
 mailSender.setUsername("mosaic@qq.com");
 mailSender.setPassword("asterisks");
 ...

/**
 *
 简单邮件发送
 *
 */
public void simpleSend()
 {
 //
 构建简单邮件对象，见名知意
 SimpleMailMessage
 smm = new SimpleMailMessage();
 //
 设定邮件参数
 smm.setFrom(mailSender.getUsername());
 smm.setTo("mosaic@126.com");
 smm.setSubject("Hello
 world");
 smm.setText("Hello
 world via spring mail sender");
 //
 发送邮件
 mailSender.send(smm);
}

/**
 *
 带附件的邮件发送
 *
 *
 @throws MessagingException
 */
public void attachedSend()
throws MessagingException
 {
 //使用JavaMail的MimeMessage，支付更加复杂的邮件格式和内容
 MimeMessage
 msg = mailSender.createMimeMessage();
 //创建MimeMessageHelper对象，处理MimeMessage的辅助类
 MimeMessageHelper
 helper = new MimeMessageHelper(msg,
true);
 //使用辅助类MimeMessage设定参数
 helper.setFrom(mailSender.getUsername());
 helper.setTo("mosaic@126.com");
 helper.setSubject("Hello
 Attachment");
 helper.setText("This
 is a mail with attachment");
 //加载文件资源，作为附件
 ClassPathResource
 file = new ClassPathResource(
   "Chrysanthemum.jpg");
 //加入附件
 helper.addAttachment("attachment.jpg",
 file);
 //发送邮件
 mailSender.send(msg);
}

/**发送富文本邮件
 *
 @throws MessagingException
 */
public void richContentSend()
throws MessagingException
 {
 MimeMessage
 msg = mailSender.createMimeMessage();
 
 MimeMessageHelper
 helper = new MimeMessageHelper(msg,
true);
 
 helper.setFrom(mailSender.getUsername());
 helper.setTo("mosaic@126.com");
 helper.setSubject("Rich
 content mail");
 //第二个参数true，表示text的内容为html，然后注意标签，src='cid:file'，'cid'是contentId的缩写，'file'是一个标记，需要在后面的代码中调用MimeMessageHelper的addInline方法替代成文件
 helper.setText(
   "
Hello
 Html Email
",
   true);
 
 FileSystemResource
 file = new FileSystemResource(
   "C:\\Users\\Public\\Pictures\\Sample
 Pictures\\Chrysanthemum.jpg");
 helper.addInline("file",
 file);
 
 mailSender.send(msg);
}

...
private VelocityEngine
 velocityEngine;
 
public SpringMailSender()
 {
  ...
 //
 Velocity的参数，通过VelocityEngineFactoryBean创建VelocityEngine，也是推荐在配置文件中配置的
 Properties
 props = System.getProperties();
 props.put("resource.loader",
"class");
 props
   .put("class.resource.loader.class",
     "org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");
 VelocityEngineFactoryBean
 v = new VelocityEngineFactoryBean();
 v.setVelocityProperties(props);
 try {
  velocityEngine
 = v.createVelocityEngine();
 }
catch (VelocityException
 e) {
  e.printStackTrace();
 }
catch (IOException
 e) {
  e.printStackTrace();
 }
 
}

${user}
 

${content}

/**
 *
 使用Velocity模板发送邮件
 *
 *
 @throws MessagingException
 */
public
 void templateSend() throws MessagingException {
 //
 声明Map对象，并填入用来填充模板文件的键值对
 Map model = new HashMap();
 model.put("user",
 "MZULE");
 model.put("content",
 "Hello");
 //
 Spring提供的VelocityEngineUtils将模板进行数据填充，并转换成普通的String对象
 String
 emailText = VelocityEngineUtils.mergeTemplateIntoString(
   velocityEngine,
 "index.vm", model);
 //
 和上面一样的发送邮件的工作
 MimeMessage
 msg = mailSender.createMimeMessage();
 MimeMessageHelper
 helper = new MimeMessageHelper(msg, true);
 helper.setFrom(mailSender.getUsername());
 helper.setTo("mosaic@126.com");
 helper.setSubject("Rich
 content mail");
 helper.setText(emailText,
 true);
 
 mailSender.send(msg);
}