import org.apache.commons.mail.Email;
import org.apache.commons.mail.HtmlEmail;
import org.apache.commons.mail.SimpleEmail;
import org.apache.log4j.Logger;

public class EmailUtil {
	private static final Logger LOGGER = Logger.getLogger(EmailUtil.class);

	private static final String HOSTNAME = "smtp.qq.com";
	public static final String POP_USERNAME = "
 
[email protected]";//此設定傳送郵件的郵箱
    private static final String USERNAME = "xxx"; // 設定發件郵箱的顯示名
	private static final String POP_PASSWORD = "dddd";//郵箱的授權碼
	private static final String CODING = "UTF-8";
	/**
	 * 普通文字郵件
	 */
	public static void sendEmail(String toEmail,String emailSubject,String emailContent){
		SimpleEmail simpleEmail = new SimpleEmail();
		simpleEmail.setSSLOnConnect(true);
		simpleEmail.setSslSmtpPort("465");
		simpleEmail.setHostName(HOSTNAME);
		simpleEmail.setAuthentication(POP_USERNAME, POP_PASSWORD);
		simpleEmail.setCharset(CODING);
//		setEmailBase(simpleEmail);
		
		try {
			simpleEmail.addTo(toEmail);
			simpleEmail.setFrom(POP_USERNAME, USERNAME);
			simpleEmail.setSubject(emailSubject);
			simpleEmail.setMsg(emailContent);
			simpleEmail.send();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			LOGGER.error("傳送郵件失敗", e);
		} 
		
	}
	
	/**
	 * 普通文字郵件
	 */
	public static void sendHtmlEmail(String[] toEmail,String emailSubject,String emailContent){
		HtmlEmail htmlEmail = new HtmlEmail();
		htmlEmail.setSSLOnConnect(true);
		htmlEmail.setSslSmtpPort("465");
		htmlEmail.setHostName(HOSTNAME);
		htmlEmail.setAuthentication(POP_USERNAME, POP_PASSWORD);
		htmlEmail.setCharset(CODING);
//		setEmailBase(htmlEmail);
		try {
			htmlEmail.addTo(toEmail);
			htmlEmail.setFrom(POP_USERNAME, USERNAME);
			htmlEmail.setSubject(emailSubject);
			htmlEmail.setHtmlMsg(emailContent);
			htmlEmail.send();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			LOGGER.error("傳送郵件失敗", e);
		} 
		
	}
	
	public static void setEmailBase(Email email){
		email.setHostName(HOSTNAME);
		email.setAuthentication(POP_USERNAME, POP_PASSWORD);
		email.setCharset(CODING);
	}

	
	public static void main(String[] args) {
//		sendEmail("
 
[email protected]", "註冊確認", "註冊成功");  //[email protected]接收郵箱
//		String url = "http://www.baidu.com";
//		String htmlMsg = "<div>請單擊下面連結進行啟用<br><a href='"+url+"'>"+url+"</a></div>";
//		sendHtmlEmail("[email protected]", "註冊確認", htmlMsg);
	}
}

1、程式碼編寫完以後必須進入傳送郵件的郵箱開啟pop3/stmp協議，獲取授權碼

步驟如下圖：

第二張圖中獲取的授權碼替換程式中的即可，這樣就可以傳送郵件了。