Apache Commons Email使用心得
最近在項目中開發中需要用到發送郵件功能，當后臺定時任務處理完畢后通知調用者。Java Mail API使用比較麻煩，所以這里采用的是Apache Commons Email，官網地址：http://commons.apache.org/proper/commons-email/，Commons Email API比較簡潔高效，學習起來也很快。
1、發送簡單文本郵件
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、發送帶附件的郵件
// 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();另外還可以通過任意的鏈接來將網絡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、發送HTML格式的郵件
// 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、發送帶圖片的HTML格式郵件
// 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，在使用過程中發現Email.addTo一次只能添加一個聯系人，如果想發送給多個人的話，需要使用for循環嵌套來實現，以下是一個簡單的例子：
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++){ //嵌套調用
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();
}
}
詳細教程可以參考官網UserGuide，鏈接：http://commons.apache.org/proper/commons-email/userguide.html
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