JavaMail简单客户端邮件发送

使用qq邮箱服务器，实现简单邮件发送功能。

一、设置qq邮箱账号

该账号作为邮件的发送账号。设置操作：进入到QQ邮箱，设置--账号，找到POP3/SMTP服务进行开启。

二、下载javamail.jar

下载地址：http://www.oracle.com/technetwork/java/javamail/index.html

三、编写代码

String host = "smtp.qq.com";
        String from = "[email protected]";
        String to = "[email protected]";//多个收信地址用逗号分隔
        String subject = "邮件发送测试";
       
        String user = "123456";
        String password = "password";
        
        String content = "<h2><font color=red>hello kitty 是hello kitty么？</font></h2>";
        
        
	Properties props = new Properties();
        props.put("mail.smtp.host", host); // 指定SMTP服务器
        props.put("mail.smtp.auth", "true"); // 指定是否需要SMTP验证

        try {

            Session mailSession = Session.getDefaultInstance(props);

            Message message = new MimeMessage(mailSession);
            
            //设置发信人
            InternetAddress isFrom = new InternetAddress(from);
            isFrom.setPersonal("中国海军");
            message.setFrom(isFrom);
            
            //设置收信人
            InternetAddress[] isTo = InternetAddress.parse(to);
            message.setRecipients(Message.RecipientType.TO, isTo);
            
            //邮件主题
            message.setSubject(subject); 
            
            //设置邮件的内容格式为html显示
            message.setContent(content, "text/html;charset=GBK");

            message.saveChanges();

            Transport transport = mailSession.getTransport("smtp");

            transport.connect(host, user, password);

            transport.sendMessage(message, message.getAllRecipients());

            transport.close();

        } catch(Exception e) {

            System.out.println(e);

        }

三、发送附件功能

public class MailTest 
{
	public static void main(String[] args) 
	{
	String host = "smtp.qq.com";
        String from = "[email protected]";
        String to = "[email protected],[email protected]";
        String subject = "邮件发送测试";
       
       String user = "123456"; 
       String password = "password";
        
        String content = "<h2><font color=red>hello kitty 是hello kitty么？</font></h2>";
        
        String attachmentFileName = "test211.txt";
        File attachment = new File("C:\\Users\\pc\\Desktop\\mail\\test211.txt");
        
		Properties props = new Properties();
        props.put("mail.smtp.host", host); // 指定SMTP服务器
        props.put("mail.smtp.auth", "true"); // 指定是否需要SMTP验证

        try {

            Session mailSession = Session.getDefaultInstance(props);

            Message message = new MimeMessage(mailSession);
            
            //设置发信人
            InternetAddress isFrom = new InternetAddress(from);
            isFrom.setPersonal("中国海军");
            message.setFrom(isFrom);
            
            //设置收信人
            InternetAddress[] isTo = InternetAddress.parse(to);
            message.setRecipients(Message.RecipientType.TO, isTo);
            
            //邮件主题
            message.setSubject(subject); 
            
            //设置邮件的内容格式为html显示
            message.setContent(getContent(content, attachmentFileName, attachment), "text/html;charset=GBK");

            message.saveChanges();

            Transport transport = mailSession.getTransport("smtp");

            transport.connect(host, user, password);

            transport.sendMessage(message, message.getAllRecipients());

            transport.close();

        } catch(Exception e) {

            System.out.println(e);

        }
	}
	
	public static MimeMultipart getContent(String content, String attachmentFileName, File attachment) throws Exception {
		MimeMultipart mp = new MimeMultipart();

		BodyPart mdpText = new MimeBodyPart();
		
		mdpText.setContent(content, "text/html;charset=GBK");

		mp.addBodyPart(mdpText);

		if (null != attachmentFileName && null != attachment) {
			try {
				
				String fileName = attachmentFileName;
				fileName = new String(fileName.getBytes("GBK"), "ISO8859-1");
				MimeBodyPart mbpAtt = new MimeBodyPart();
				mbpAtt.setFileName(fileName);
				mbpAtt.setDataHandler(new DataHandler(new FileDataSource(attachment)));
				
				mp.addBodyPart(mbpAtt);
			} catch (Exception e) {
				e.printStackTrace();
			} finally {
			}
		}

		return mp;
	}
}

四、发送图片

要在邮件内容中描述：图片放在哪里

要在邮件的数据中描述：图片在哪里

<h2><font color=red>hello kitty 是hello kitty么？</font></h2><br><img src='cid:1.jpg'></img>

MimeBodyPart image = new MimeBodyPart();  
        image.setDataHandler(new DataHandler(new FileDataSource("C:\\Users\\pc\\Desktop\\mail\\1.jpg")));
        image.setContentID("1.jpg");
        mp.addBodyPart(image);