Apache Commons Email使用心得
最近在项目中开发中需要用到发送邮件功能，当后台定时任务处理完毕后通知调用者。Java Mail API使用比较麻烦，所以这里采用的是Apache Commons Email，官网地址：http://commons.apache.org/proper/commons-email/，Commons Email API比较简洁高效，学习起来也很快。写篇文章跟大家分享一下，有问题的可以留言！
1、发送简单文本邮件
Email email = new SimpleEmail();
email.setHostName("smtp.googlemail.com");
email.setSmtpPort(465);
email.setAuthenticator(new DefaultAuthenticator("username", "password"));
email.setSSLOnConnect(true);
email.setFrom("[email protected]");
email.setSubject("TestMail");
email.setMsg("This is a test mail ... :-)");
email.addTo("[email protected]");
email.send();
2、发送带附件的邮件
// Create the attachment
EmailAttachment attachment = new EmailAttachment();
attachment.setPath("mypictures/john.jpg");
attachment.setDisposition(EmailAttachment.ATTACHMENT);
attachment.setDescription("Picture of John");
attachment.setName("John");
// Create the email message
MultiPartEmail email = new MultiPartEmail();
email.setHostName("mail.myserver.com");
email.addTo("[email protected]", "John Doe");
email.setFrom("[email protected]", "Me");
email.setSubject("The picture");
email.setMsg("Here is the picture you wanted");
// add the attachment
email.attach(attachment);
// send the email
email.send();
另外还可以通过任意的链接来将网络上的文件添加到附件中，例如：
// Create the attachment
EmailAttachment attachment = new EmailAttachment();
attachment.setURL(new URL("http://www.apache.org/images/asf_logo_wide.gif"));
attachment.setDisposition(EmailAttachment.ATTACHMENT);
attachment.setDescription("Apache logo");
attachment.setName("Apache logo");
// Create the email message
MultiPartEmail email = new MultiPartEmail();
email.setHostName("mail.myserver.com");
email.addTo("[email protected]", "John Doe");
email.setFrom("[email protected]", "Me");
email.setSubject("The logo");
email.setMsg("Here is Apache's logo");
// add the attachment
email.attach(attachment);
// send the email
email.send();
3、发送HTML格式的邮件
// Create the email message
HtmlEmail email = new HtmlEmail();
email.setHostName("mail.myserver.com");
email.addTo("[email protected]", "John Doe");
email.setFrom("[email protected]", "Me");
email.setSubject("Test email with inline image");
// embed the image and get the content id
URL url = new URL("http://www.apache.org/images/asf_logo_wide.gif");
String cid = email.embed(url, "Apache logo");
// set the html message
email.setHtmlMsg("<html>The apache logo - <img src=\"cid:"+cid+"\"></html>");
// set the alternative message
email.setTextMsg("Your email client does not support HTML messages");
// send the email
email.send();
4、发送带图片的HTML格式邮件
// load your HTML email template
String htmlEmailTemplate = ....
// define you base URL to resolve relative resource locations
URL url = new URL("http://www.apache.org");
// create the email message
HtmlEmail email = new ImageHtmlEmail();
email.setDataSourceResolver(new DataSourceResolverImpl(url));
email.setHostName("mail.myserver.com");
email.addTo("[email protected]", "John Doe");
email.setFrom("[email protected]", "Me");
email.setSubject("Test email with inline image");
// set the html message
email.setHtmlMsg(htmlEmailTemplate);
// set the alternative message
email.setTextMsg("Your email client does not support HTML messages");
// send the email
email.send();
另外，在使用过程中发现Email.addTo一次只能添加一个联系人，如果想发送给多个人的话，需要使用for循环嵌套来实现，以下是一个简单的例子：
public static void main(String[] args){
String mailList = "[email protected];[email protected]";
String[] list = mailList.split(";");
for(int i=0;list!=null && i<list.length;i++){ //嵌套调用
sendEmail(list[i]);
}
}
public static void sendEmail(String target) {
try{
Email email = new SimpleEmail();
email.setHostName("smtp.163.com");
email.setSmtpPort(465);
email.setAuthenticator(new DefaultAuthenticator("[email protected]","abc"));
email.setSSLOnConnect(true);
email.setFrom("[email protected]");
email.addTo(target);
email.setSubject("Test Mail");
email.setMsg("This is a test mail");
email.send();
}catch (Exception e){
e.printStackTrace();
}
}
详细教程可以参考官网UserGuide，链接：http://commons.apache.org/proper/commons-email/userguide.html