使用Apache Commons Email 发生邮件

Apache Commons Email的Maven依赖

 <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-email -->
 <dependency>
     <groupId>org.apache.commons</groupId>
     <artifactId>commons-email</artifactId>
     <version>1.4</version>
 </dependency>

使用示例：

 package app.hihn.me.mail.demo;

 import java.net.MalformedURLException;
 import java.net.URL;

 import org.apache.commons.mail.DefaultAuthenticator;
 import org.apache.commons.mail.Email;
 import org.apache.commons.mail.EmailAttachment;
 import org.apache.commons.mail.EmailException;
 import org.apache.commons.mail.HtmlEmail;
 import org.apache.commons.mail.ImageHtmlEmail;
 import org.apache.commons.mail.MultiPartEmail;
 import org.apache.commons.mail.SimpleEmail;
 import org.apache.commons.mail.resolver.DataSourceUrlResolver;

 /**
  *
  * <pre>
  * <h1>Debugging</h1>
  * The JavaMail API supports a debugging option that will can be very
  * useful if you run into problems. You can activate debugging on any of the
  * mail classes by calling setDebug(true). The debugging output will be written
  * to System.out.
  *
  * Sometimes you want to experiment with various security setting or features of
  * commons-email. A good starting point is the test class EmailLiveTest and
  * EmailConfiguration which are used for testing commons-email with real SMTP
  * servers.
  *
  * </pre>
  *
  * @describe Apache Commons Email 使用示例
  * @author liwen
  *
  */
 public class SendEmailDemo {
     /**
      * <pre>
      *
      * Our first example will create a basic email message to "John Doe" and
      * send it through your Google Mail (GMail) account.
      *
      * The call to setHostName("mail.myserver.com") sets the address of the outgoing SMTP
      * server that will be used to send the message. If this is not set, the
      * system property "mail.host" will be used.
      *
      * </pre>
      *
      * @describe 发送内容为简单文本的邮件
      * @throws EmailException
      */
     public static void sendSimpleTextEmail() throws EmailException {
         Email email = new SimpleEmail();
         email.setHostName("smtp.googlemail.com");
         email.setSmtpPort(465);
         // 用户名和密码为邮箱的账号和密码（不需要进行base64编码）
         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();
     }

     /**
      * <pre>
      *
      * To add attachments to an email, you will need to use the MultiPartEmail
      * class. This class works just like SimpleEmail except that it adds several
      * overloaded attach() methods to add attachments to the email. You can add
      * an unlimited number of attachments either inline or attached. The
      * attachments will be MIME encoded.
      *
      * The simplest way to add the attachments is by using the EmailAttachment
      * class to reference your attachments.
      *
      * In the following example, we will create an attachment for a picture. We
      * will then attach the picture to the email and send it.
      *
      * </pre>
      *
      * @describe 发送包含附件的邮件（附件为本地资源）
      * @throws EmailException
      */
     public static void sendEmailsWithAttachments() throws EmailException {
         // 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();
     }

     /**
      * <pre>
      *
      * You can also use EmailAttachment to reference any valid URL for files
      * that you do not have locally. When the message is sent, the file will be
      * downloaded and attached to the message automatically.
      *
      * The next example shows how we could have sent the apache logo to John
      * instead.
      *
      * </pre>
      *
      * @describe 发送包含附件的邮件（附件为在线资源）
      * @throws EmailException
      * @throws MalformedURLException
      */
     public static void sendEmailsWithOnlineAttachments() throws EmailException, MalformedURLException {
         // 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();
     }

     /**
      * <pre>
      *
      * Sending HTML formatted email is accomplished by using the HtmlEmail
      * class. This class works exactly like the MultiPartEmail class with
      * additional methods to set the html content, alternative text content if
      * the recipient does not support HTML email, and add inline images.
      *
      * In this example, we will send an email message with formatted HTML
      * content with an inline image.
      *
      * First, notice that the call to embed() returns a String. This String is a
      * randomly generated identifier that must be used to reference the image in
      * the image tag.
      *
      * Next, there was no call to setMsg() in this example. The method is still
      * available in HtmlEmail but it should not be used if you will be using
      * inline images. Instead, the setHtmlMsg() and setTextMsg() methods were
      * used.
      *
      * <pre>
      *
      * @describe 发送内容为HTML格式的邮件
      * @throws EmailException
      * @throws MalformedURLException
      */
     public static void sendHTMLFormattedEmail() throws EmailException, MalformedURLException {
         // 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();
     }

     /**
      * <pre>
      *
      * The previous example showed how to create a HTML email with embedded
      * images but you need to know all images upfront which is inconvenient when
      * using a HTML email template. The ImageHtmlEmail helps you solving this
      * problem by converting all external images to inline images.
      *
      * First we create a HTML email template referencing some images. All
      * referenced images are automatically transformed to inline images by the
      * specified DataSourceResolver.
      *
      * </pre>
      *
      * @describe 发送内容为HTML格式的邮件（嵌入图片更方便）
      * @throws MalformedURLException
      * @throws EmailException
      */
     public static void sendHTMLFormattedEmailWithEmbeddedImages() throws MalformedURLException, EmailException {
         // load your HTML email template
         String htmlEmailTemplate = ".... <img src=\"http://www.apache.org/images/feather.gif\"> ....";

         // define you base URL to resolve relative resource locations
         URL url = new URL("http://www.apache.org");

         // create the email message
         ImageHtmlEmail email = new ImageHtmlEmail();
         email.setDataSourceResolver(new DataSourceUrlResolver(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();
     }

     public static void main(String[] args) throws EmailException {
         Email email = new SimpleEmail();
         email.setHostName("smtp.163.com");
         email.setSmtpPort(465);
         email.setAuthenticator(new DefaultAuthenticator("liwenzlw@163.com", "xxxxxxxxxxxxx"));
         email.setSSLOnConnect(true);
         email.setFrom("liwenzlw@163.com", "利文");
         email.setSubject("异常信息");
         email.setMsg("This is a test mail ... :-)");
         email.addTo("1309928657@qq.com");
         email.send();
     }
 }