java實作發郵件的功能

1. 導入依賴

   <dependency>
    		<groupId>javax.activation</groupId>
    		<artifactId>activation</artifactId>
    		<version>1.1</version>
    	</dependency>
    	<dependency>
    		<groupId>javax.mail</groupId>
    		<artifactId>mail</artifactId>
    		<version>1.4</version>
    	</dependency>
              

2. 定義使用者名密碼

   package org.lhj.pro.email;
    import javax.mail.Authenticator; 
    import javax.mail.PasswordAuthentication;
    
    /**
     * 發件人賬号密碼
     * @author zhangdi
     *
     */
    public class MailAuthenticator extends   Authenticator{
    
        public static String USERNAME = "";
        public static String PASSWORD = "";
    
        public MailAuthenticator() {
        }
    
        protected PasswordAuthentication getPasswordAuthentication() {
            return new PasswordAuthentication(USERNAME, PASSWORD);
        }
    }
              

3. 郵件發送工具類

   package org.lhj.pro.email;
    import java.util.Date; 
    import java.util.Properties;
    import javax.mail.Message;
    import javax.mail.Multipart;
    import javax.mail.Session;
    import javax.mail.Transport;
    import javax.mail.internet.InternetAddress;
    import javax.mail.internet.MimeBodyPart;
    import javax.mail.internet.MimeMessage;
    import javax.mail.internet.MimeMultipart;/**
     * 郵件發送操作類
     * 
     * @author zhangdi
     * 
     */
    public class MailOperation {
    
        /**
         * 發送郵件
         * @param user 發件人郵箱
         * @param password 授權碼（注意不是郵箱登入密碼）
         * @param host 
         * @param from 發件人
         * @param to 接收者郵箱
         * @param subject 郵件主題
         * @param content 郵件内容
         * @return success 發送成功 failure 發送失敗
         * @throws Exception
         */
        public String sendMail(String user, String password, String host,
                String from, String to, String subject, String content)
                throws Exception {
            if (to != null){
                Properties props = System.getProperties();
                props.put("mail.smtp.host", host);
                props.put("mail.smtp.auth", "true");
                MailAuthenticator auth = new MailAuthenticator();
                MailAuthenticator.USERNAME = user;
                MailAuthenticator.PASSWORD = password;
                Session session = Session.getInstance(props, auth);
                session.setDebug(true);
                try {
                    MimeMessage message = new MimeMessage(session);
                    message.setFrom(new InternetAddress(from));
                    if (!to.trim().equals(""))
                        message.addRecipient(Message.RecipientType.TO,
                                new InternetAddress(to.trim()));
                    message.setSubject(subject);
                    MimeBodyPart mbp1 = new MimeBodyPart(); // 正文
                    mbp1.setContent(content, "text/html;charset=utf-8");
                    Multipart mp = new MimeMultipart(); // 整個郵件：正文+附件
                    mp.addBodyPart(mbp1);
                    // mp.addBodyPart(mbp2);
                    message.setContent(mp);
                    message.setSentDate(new Date());
                    message.saveChanges();
                    Transport trans = session.getTransport("smtp");
                    trans.send(message);
                    System.out.println(message.toString());
                } catch (Exception e){
                    e.printStackTrace();
                    return "failure";
                }
                return "success";
            }else{            
                return "failure";
            }
        }
    
    }
              

4. 測試類

   package org.lhj.pro.email;
    
    import java.util.Random;
    
    import org.apache.commons.lang3.RandomUtils;
    
    public class TestEmail {
    
    	public static void main(String[] args) {
    	
    	        MailOperation operation = new MailOperation();
    	        String user = "[email protected]"; // 你的郵箱位址
    	        String password = "lhj123456"; // 你的郵箱授權碼
    	        String host = "smtp.163.com";
    	        String from = "[email protected]"; // 你的郵箱位址
    	        String to = "[email protected]";// 收件人 目标郵箱位址
    	        String subject = "測試發郵件功能"; // 輸入郵件主題
    	        //郵箱内容
    	        StringBuffer sb = new StringBuffer();
    	        int yzm = new Random().nextInt(99999)+100000; //随機生成6位驗證碼
    	        System.err.println("擷取驗證碼的第一種方式：" + yzm);
    	        System.err.println("擷取驗證碼的另一種方式：" + (int)((Math.random()*9+1)*100000));
    	        sb.append("<!DOCTYPE>"+"<div bgcolor='#f1fcfa'   style='border:1px solid #d9f4ee; font-size:14px; line-height:22px; color:#005aa0;padding-left:1px;padding-top:5px;   padding-bottom:5px;'><span style='font-weight:bold;'>溫馨提示：</span>"
    	                          + "<div style='width:950px;font-family:arial;'>歡迎使用xxx平台，您的注冊碼為：<br/><h2 style='color:green'>"+yzm+"</h2><br/>本郵件由系統自動發出，請勿回複。<br/>感謝您的使用。<br/>xxx有限公司</div>"
    	                         +"</div>");
    	        try {
    	            String res = operation.sendMail(user, password, host, from, to,
    	                    subject, sb.toString());
    	            System.out.println(res);
    	        } catch (Exception e) {
    	            // TODO Auto-generated catch block
    	            e.printStackTrace();
    	        }
    	    }
    }
              

5. 郵件樣式如下

溫馨提示：

歡迎使用xxx平台，您的注冊碼為：

127582

本郵件由系統自動發出，請勿回複。

感謝您的使用。

xxx有限公司