直接上程式碼：3個類，兩個主要的類，一個測試類：

   主類（Mail）：

 /**  
* @Title: Mail.java
* @Package org.service.impl
* @Description: TODO該方法的主要作用：
* @author A18ccms A18ccms_gmail_com  
* @date 2017-5-30 下午10:20:35
* @version V1.0  
*/
package org.service.impl;

import java.util.Date;
import java.util.Properties;

import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

 /**   
 *    
 * 專案名稱：spring_Schop8   
 * 類名稱：Mail   
 * 類描述：   不用spring實現郵件傳送
 * 建立人：Mu Xiongxiong  
 * 建立時間：2017-5-30 下午10:20:35   
 * 修改人：Mu Xiongxiong   
 * 修改時間：2017-5-30 下午10:20:35   
 * 修改備註：   
 * @version    
 *    
 */
public class Mail {
	
	private String mailServer,from ,to , mailSubject,mailContent,username,password;

	public Mail(String mailServer, String from, String to, String mailSubject,
			String mailContent, String username, String password) {
		this.mailServer = mailServer;
		this.from = from;
		this.to = to;
		this.mailSubject = mailSubject;
		this.mailContent = mailContent;
		this.username = username;
		this.password = password;
	}

	public Mail() {
		username = "tina";
		password = "123"; 
		mailServer = "mail.com";
		from  = "
 
[email protected]";
		to  = "[email protected]";
		mailSubject = "問好";
		mailContent = "好久沒見，最近可好！";
		
	}
	
	public void send(){
		//設定伺服器
		Properties prop = System.getProperties();
		prop.put("mail.smtp.host", mailServer);
		prop.put("mail.smtp.auth", "true");
		//產生Session服務
		EmailAuthenticator mailauth = new EmailAuthenticator(username, password);
		Session mailSession = Session.getInstance(prop,(Authenticator)mailauth);
		//封裝message物件
		Message message = new MimeMessage(mailSession);
		try {
			message.setFrom(new InternetAddress(from));    //設定傳送人
			message.setRecipient(Message.RecipientType.TO, new InternetAddress(to)); //設定主題
			message.setSubject(mailSubject);                                      //設定標題
			message.setContent(mailContent,"text/html;charset=utf-8");            //設定內容
			message.setSentDate(new Date());                                      //設定日期
			//和粗昂就愛你Transport例項
			Transport tran = mailSession.getTransport("smtp");
			tran.send(message, message.getAllRecipients());
			tran.close();
		} catch (AddressException e) {
			// TODO 異常執行塊！
			e.printStackTrace();
		} catch (MessagingException e) {
			// TODO 異常執行塊！
			e.printStackTrace();
		}    //
		
	}
	
	

}
 

package org.service.impl;


import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;

import org.hibernate.validator.constraints.Email;

public class EmailAuthenticator extends Authenticator {
	private String username=null;
	private String userpass = null;
	
	
	
	public EmailAuthenticator(String username, String userpass) {
		super();
		this.username = username;
		this.userpass = userpass;
	}


	public  PasswordAuthentication getPasswordAuthentication(){
		return new PasswordAuthentication(username, userpass);
	}
	
	
	public String getUsername() {
		return username;
	}
	public void setUsername(String username) {
		this.username = username;
	}
	public String getUserpass() {
		return userpass;
	}
	public void setUserpass(String userpass) {
		this.userpass = userpass;
	}
	

}
 

/**
	 * 
	* @Title: testMail1
	* @Description: 該方法的主要作用：java實現底層的郵件傳送
	* @param   設定檔案  
	* @return  返回型別：void   
	* @throws
	 */
	@Test
	public void testMail1(){
		Mail mail = new Mail();
		mail.send();
		System.out.println("傳送成功");
	}

可以看到傳送人，傳送時間，還有傳送內容！已經發送成功！