Commons-Email发送邮件（翻译自官网）

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所需jar包：

<dependency>    <groupId>org.apache.commons</groupId>    <artifactId>commons-email</artifactId>    <version>1.3.1</version></dependency>

<dependency>    <groupId>commons-logging</groupId>    <artifactId>commons-logging</artifactId>    <version>1.1.1</version></dependency>

1、发送简单文本

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();

setHostName("mail.myserver.com")设置出口smtp地址，也可以在system.property系统变量mail.host中设置

2、文本+附件

import org.apache.commons.mail.*;...  // 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();

你也可以用使用EmailAttachment发送有效url的附件，当邮件发送时会自动进行附件下载，以下是例子

import org.apache.commons.mail.*;...  // 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、发送格式化HTML

import org.apache.commons.mail.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");    // 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();

embed()返回值为一个随机生成的字符串，用来表示引用的图片标签；同时相应的取消了setmsg ，改成 setHtmlMsg与setTextMsg区分html与纯文本

4、发送格式为html及内嵌附件

解决上3中需要提供cid并拼接图片的问题，使用模板化html ImageHtmlEmail 发出，解决了需要将外部图片转换为inline内联图片的问题

import org.apache.commons.mail.HtmlEmail;...  // 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();

首先我们声明了一个html模板并包含图片url，所有图片都会自动转化为内联图片，通过DataSourceResolver解析器

最后附上自己使用的例子：

HtmlEmail email = new HtmlEmail ();        email.setHostName("mail.xxxx.com");        email.setAuthentication("leo.li@xxxx.com", "1qaz!QAZ");        email.setCharset("UTF-8");        try {            String[] receivers = new String[]{"leo.li@xxxx.com", "zs.zhou@xxxx.com"};            for (String receiver : receivers) {                email.addTo(receiver.trim());            }            email.setFrom("leo.li@xxxx.com", "leoeleoeleole");            email.setSubject("test");            email.setMsg("<html><div style=\"background:red;\">草草草擦凑啊</div></html>");List<String> list = new ArrayList<String>();            list.add("C:\\Users\\Administrator\\Desktop\\0010164 xxxx表.xls");            if (!CollectionUtils.isEmpty(list)) {                for (String attachment : list) {                    EmailAttachment attach = new EmailAttachment();                    File f = new File(attachment);                    attach.setName(MimeUtility.encodeText(f.getName()));                    attach.setPath(attachment);                    email.attach(attach);                }            }           String result  = email.send();

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