使用Commons-mail发送邮件：更合逻辑的实例

先定义mail的一个bean：

public class Mail {
   
    private String toAddress;   // 邮件接收者   
    private String nickname;    // 收件人昵称
    private String subject;   // 邮件主题   
    private String content;   // 邮件内容 
    private String ChartSet;  //字符集
	private Map<String, String> AttachmentsPath;   //附件路径列表 
    
    
    /////setter() and getter()...
}

有了bean后，发送文本形式邮件。发件人在类初始化时完成，然后接下来就可以不断发送而不需再定义。

public class TextMailSender {
	
	private String hostname;
	private String username;
	private String password;
	private String address;
	private Boolean TLS;
	
	public TextMailSender(String hostname, String address, String username, String password, Boolean TLS) {
		this.hostname = hostname;
		this.username = username;
		this.password = password;
		this.address = address;
		this.TLS = TLS;
	}
	
	/**
	 * @throws EmailException 
	 * 
	 * **/
	public void execute(Mail mail) throws EmailException{
		
		SimpleEmail email = new SimpleEmail();
        email.setTLS(TLS);      
        email.setHostName(hostname);  
        email.setAuthentication(username, password); // 用户名和密码  
        email.setFrom(address); // 发送地址
        
        email.addTo(mail.getToAddress()); // 接收地址 
        email.setSubject(mail.getSubject()); // 邮件标题
        email.setCharset(mail.getChartSet());
        email.setMsg(mail.getContent()); // 邮件内容
        email.send();
	}
	
	////
	public static void main(String[] args) {
		TextMailSender sender = new TextMailSender("smtp.qq.com", "[email protected]", "cesul", "******", true);
		
		Mail mail = new Mail();
		mail.setToAddress("[email protected]");
		mail.setSubject("这又是一封测试邮件！");
		mail.setContent("呵呵呵呵呵");
		mail.setChartSet("utf-8");
		try {
			sender.execute(mail);
		} catch (EmailException e) {
			e.printStackTrace();
		}
		System.out.println("Finished");
	}
}

如果需要添加（多个）附件，使用commons-mail的另一个类：

public class AttachmentSender {
	
	private String hostname;  //"SMTP服务器"
	private String username;
	private String password;
	private String address;
	private String nickname;
	private Boolean TLS;
	
	public AttachmentSender(String hostname, String address, String nickname, String username, String password, Boolean TLS) {
		this.hostname = hostname;
		this.nickname = nickname;
		this.username = username;
		this.password = password;
		this.address = address;
		this.TLS = TLS;
	}
	
	/**
	 * @throws UnsupportedEncodingException 
	 * @throws EmailException 
	 * 
	 * **/
	@SuppressWarnings("unchecked")
	public void execute(Mail mail) throws UnsupportedEncodingException, EmailException{

		// Create the email message 
		MultiPartEmail email = new MultiPartEmail(); 
		email.setHostName(hostname); 
		email.setAuthentication(username, password); 
		email.setFrom(address, nickname);   //可以加入发信人称呼
		email.setTLS(TLS);
		
		email.setCharset(mail.getChartSet());
		email.addTo(mail.getToAddress(), mail.getNickname()); 
		email.setSubject(mail.getSubject());
		email.setMsg(mail.getContent()); 
		
		EmailAttachment attachment;
		Iterator<? extends Object> it = mail.getAttachmentsPath().entrySet().iterator(); //附件是多个 ，遍历
		while (it.hasNext()) {  
			Map.Entry<String, String> entry = (Map.Entry<String, String>)it.next();  
			attachment = new EmailAttachment();
			attachment.setPath(entry.getKey());  //键是附件路径
			attachment.setDisposition(EmailAttachment.ATTACHMENT); 
			attachment.setDescription(MimeUtility.encodeWord("附件","UTF-8",null));
			attachment.setName(MimeUtility.encodeWord(entry.getValue(),"UTF-8",null));  //值是附件描述名
			email.attach(attachment);  // add the attachment
		}
		email.send(); // send the email 
	}
	

	public static void main(String[] args) {
		
		AttachmentSender sender = new AttachmentSender("smtp.qq.com", "[email protected]", "陈志钊", "cesul", "******", true);
		
		Mail mail = new Mail();
		mail.setToAddress("[email protected]");
		mail.setNickname("你好");
		mail.setSubject("Here is the picture you wanted");
		mail.setContent("呵呵呵呵呵");
		mail.setChartSet("utf-8");
		
		Map<String, String> attachment = new HashMap<String, String>();
		attachment.put("E:\\Photos\\2010-08-17-0.bmp", "这是你要的图片.bmp");
		attachment.put("E:\\Photos\\2010-07-19-1.bmp", "这也是你要的图片.bmp");  //不要把相同路径的文件发两次
		mail.setAttachmentsPath(attachment);
		
		try {
			sender.execute(mail);
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		} catch (EmailException e) {
			e.printStackTrace();
		}
		System.out.println("Finished");
	}
}

总结：请参看各“发送类”的构造方法:-)
====================================

要用到的最新jar包下载：

* Commons-email-1.2.zip:
http://commons.apache.org/email/download_email.cgi
* JavaBeans(TM) Activation Framework 1.1.1:
https://cds.sun.com/is-bin/INTERSHOP.enfinity/WFS/CDS-CDS_Developer-Site/en_US/-/USD/ViewFilteredProducts-SimpleBundleDownload
* JavaMail(TM) API 1.4.4 for All Supported Platforms:

https://cds.sun.com/is-bin/INTERSHOP.enfinity/WFS/CDS-CDS_Developer-Site/en_US/-/USD/ViewFilteredProducts-SingleVariationTypeFilter