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。
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("user@gmail.com"); email.setSubject("TestMail"); email.setMsg("This is a test mail ... :-)"); email.addTo("foo@bar.com"); 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("jdoe@somewhere.org", "John Doe"); email.setFrom("me@apache.org", "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("jdoe@somewhere.org", "John Doe"); email.setFrom("me@apache.org", "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("jdoe@somewhere.org", "John Doe"); email.setFrom("me@apache.org", "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("jdoe@somewhere.org", "John Doe"); email.setFrom("me@apache.org", "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 = "abc@163.com;tt@qq.com"; 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("abc@163.com","abc")); email.setSSLOnConnect(true); email.setFrom("abc@163.com"); 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
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