apache commons学习系列之Email组件

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基于commons Email version 1.3

主要类：

SimpleEmail - This class is used to send basic text based emails.

MultiPartEmail - This class is used to send multipart messages. This allows a text message with attachments either inline or attached.

HtmlEmail - This class is used to send HTML formatted emails. It has all of the capabilities as MultiPartEmail allowing attachments to be easily added. It also supports embedded images.

ImageHtmlEmail - This class is used to send HTML formatted emails with inline images. It has all of the capabilities as HtmlEmail but transform all image references to inline images.

EmailAttachment - This is a simple container class to allow for easy handling of attachments. It is for use with instances of MultiPartEmail and HtmlEmail.

还有一个jdk中的类DefaultAuthenticator，用与用户验证

应用示例：

SimpleEmail发送普通文本邮件：

Email email = new SimpleEmail();

email.setHostName("smtp.googlemail.com");

email.setSmtpPort(465);

email.setAuthenticator(new DefaultAuthenticator("username", "password"));

email.setSSLOnConnect(true);//使用SSL加密发送

email.setFrom("user@gmail.com");

email.setSubject("TestMail");

email.setMsg("This is a test mail ... :-)");

email.addTo("foo@bar.com");//使用addTo可以添加多个目的地

email.send();

使用MultiPartEmail发送带附件的邮件：

  // Create the attachment  EmailAttachment attachment = new EmailAttachment();//路径可以为绝对或相对地址，也可以使用setURL  attachment.setPath("mypictures/john.jpg");//附件处理方式，作为附件或内嵌为内容  attachment.setDisposition(EmailAttachment.ATTACHMENT);// attachment.setURL(new URL("http://www.apache.org/images/asf_logo_wide.gif"));
 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();

发送HtmlEmail:

// 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");//使用内嵌图片

// 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();

也可以使用如下相对路径形式使用ImageHtml：

 // 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();//指定html模板中的baseUrl email.setDataSourceResolver(new DataSourceUrlResolverl(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();

补充几点：
1.开启email组件的调试，以便出现问题时能够sysout相关信息。

email.setDebug(true);

2.邮件安全：

开启STARTTLS or SSL检察:

Email.setSSLCheckServerIdentity(true)

开启：STARTTLS:

Email.setStartTLSRequired(true)

开启SSL连接支持

email.setSSLOnConnect(true);

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