一、一般配置
发送邮件需要用到 mail包 maven 依赖如下：
1 <!-- https://mvnrepository.com/artifact/javax.mail/mail --> 2 <dependency> 3 <groupId>javax.mail</groupId> 4 <artifactId>mail</artifactId> 5 <version>1.4</version> 6 </dependency>
SSL加密方式需要用到MailSSLSocketFactory类
<!-- https://mvnrepository.com/artifact/com.sun.mail/javax.mail --> <dependency> <groupId>com.sun.mail</groupId> <artifactId>javax.mail</artifactId> <version>1.4.4</version> </dependency>
获取配置文件：
1 //获取邮箱发送邮件的配置信息 2 public Properties getEmailProperties(){ 3 Properties props = new Properties(); 4 String host = evn.getProperty("email.host"); 5 String protocol = evn.getProperty("email.protocol"); 6 String port = evn.getProperty("email.port"); 7 String from = evn.getProperty("email.from"); 8 String pwd = evn.getProperty("email.password"); 9 props.put("mail.smtp.host", host);//设置服务器地址 10 props.put("mail.store.protocol" , protocol);//设置协议 11 props.put("mail.smtp.port", port);//设置端口 12 props.put("from" , from); 13 props.put("pwd" , pwd); 14 props.put("mail.smtp.auth" , "true"); 15 return props; 16 }
邮件发送代码类：
1 /** 2 * 3 * @file springBootExample.example.infrastructure 4 * 5 */ 6 package com.tyky.educloud.platform.util; 7 8 /** 9 * @ClassName: SendEmail 10 * @Description: TODO(这里用一句话描述这个类的作用) 11 * @author hoojjack 12 * @date 2017年7月19日 下午3:23:42 13 * 14 */ 15 import java.util.Date; 16 import java.util.Properties; 17 18 import javax.mail.Authenticator; 19 import javax.mail.Message; 20 import javax.mail.MessagingException; 21 import javax.mail.PasswordAuthentication; 22 import javax.mail.Session; 23 import javax.mail.Transport; 24 import javax.mail.internet.AddressException; 25 import javax.mail.internet.InternetAddress; 26 import javax.mail.internet.MimeMessage; 27 28 public class SendEmail { 29 30 public static Properties props = new Properties(); 31 32 public static void setProps(Properties props) { 33 SendEmail.props = props; 34 } 35 36 public static Properties getProps() { 37 return props; 38 } 39 40 /** 41 * 获取Session 42 * 43 * @return 44 */ 45 private static Session getSession(final String from, final String pwd) { 46 47 Authenticator authenticator = new Authenticator() { 48 49 @Override 50 protected PasswordAuthentication getPasswordAuthentication() { 51 return new PasswordAuthentication(from, pwd); 52 } 53 54 }; 55 Session session = Session.getDefaultInstance(props, authenticator); 56 57 return session; 58 } 59 60 public static void send(String content, String toEmail) throws AddressException, MessagingException { 61 Properties properties = getProps(); 62 String from = properties.getProperty("from"); 63 String pwd = properties.getProperty("pwd"); 64 String subject = properties.getProperty("subject"); 65 66 if (null == from || null == pwd) { 67 System.out.println("发送邮箱为空"); 68 return; 69 } 70 if (null == subject) { 71 subject = "平台"; 72 } 73 Session session = getSession(from, pwd); 74 // Instantiate a message 75 Message msg = new MimeMessage(session); 76 // Set message attributes 77 msg.setFrom(new InternetAddress(from)); 78 InternetAddress[] address = { new InternetAddress(toEmail) }; 79 msg.setRecipients(Message.RecipientType.TO, address); 80 msg.setSubject(subject); 81 msg.setSentDate(new Date()); 82 msg.setContent(content, "text/html;charset=utf-8"); 83 // Send the message 84 Transport.send(msg); 85 } 86 87 public static String generateContent(String contentTitle, String url, String username, String email, 88 String validateCode) { 89 90 // String validataCode = MD5Util.encode2hex(email); 91 92 /// 邮件的内容 93 StringBuffer sb = new StringBuffer(contentTitle); 94 sb.append("<a href="" + url + "?username="); 95 sb.append(username); 96 sb.append("&email="); 97 sb.append(email); 98 sb.append("&validateCode="); 99 sb.append(validateCode); 100 sb.append("">" + url + "?username="); 101 sb.append(username); 102 sb.append("&email="); 103 sb.append(email); 104 sb.append("&validateCode="); 105 sb.append(validateCode); 106 sb.append("</a>"); 107 return sb.toString(); 108 } 109 110 }
邮件发送完整的代码：
1 /** 2 * @ClassName: SendEmail 3 * @Description: TODO(这里用一句话描述这个类的作用) 4 * @author hoojjack 5 * @date 2017年7月19日 下午3:23:42 6 * 7 */ 8 import java.util.Date; 9 import java.util.Properties; 10 11 import javax.mail.Authenticator; 12 import javax.mail.Message; 13 import javax.mail.MessagingException; 14 import javax.mail.PasswordAuthentication; 15 import javax.mail.Session; 16 import javax.mail.Transport; 17 import javax.mail.internet.AddressException; 18 import javax.mail.internet.InternetAddress; 19 import javax.mail.internet.MimeMessage; 20 21 public class SendEmail { 22 23 public static Properties props = new Properties(); 24 25 public static void setProps(Properties props) { 26 SendEmail.props = props; 27 } 28 29 public static Properties getProps() { 30 props.put("mail.smtp.host", "smtp.163.com");// 设置服务器地址 31 props.put("mail.store.protocol", "smtp.163.com");// 设置协议 32 props.put("mail.smtp.port", 25);// 设置端口 33 props.put("from", "XXX"); 34 props.put("pwd", "XXX"); 35 props.put("mail.smtp.auth", "true"); 36 } 37 38 /** 39 * 获取Session 40 * 41 * @return 42 */ 43 private static Session getSession(final String from, final String pwd) { 44 45 Authenticator authenticator = new Authenticator() { 46 47 @Override 48 protected PasswordAuthentication getPasswordAuthentication() { 49 return new PasswordAuthentication(from, pwd); 50 } 51 52 }; 53 Session session = Session.getDefaultInstance(props, authenticator); 54 55 return session; 56 } 57 58 public static void send(String content, String toEmail) throws AddressException, MessagingException { 59 Properties properties = getProps(); 60 String from = properties.getProperty("from"); 61 String pwd = properties.getProperty("pwd"); 62 String subject = properties.getProperty("subject"); 63 64 if (null == from || null == pwd) { 65 System.out.println("发送邮箱为空"); 66 return; 67 } 68 if (null == subject) { 69 subject = "平台"; 70 } 71 Session session = getSession(from, pwd); 72 // Instantiate a message 73 Message msg = new MimeMessage(session); 74 // Set message attributes 75 msg.setFrom(new InternetAddress(from)); 76 InternetAddress[] address = { new InternetAddress(toEmail) }; 77 msg.setRecipients(Message.RecipientType.TO, address); 78 msg.setSubject(subject); 79 msg.setSentDate(new Date()); 80 msg.setContent(content, "text/html;charset=utf-8"); 81 // Send the message 82 Transport.send(msg); 83 } 84 85 public static String generateContent(String contentTitle, String url, String username, String email, 86 String validateCode) { 87 88 // String validataCode = MD5Util.encode2hex(email); 89 90 /// 邮件的内容 91 StringBuffer sb = new StringBuffer(contentTitle); 92 sb.append("<a href="" + url + "?username="); 93 sb.append(username); 94 sb.append("&email="); 95 sb.append(email); 96 sb.append("&validateCode="); 97 sb.append(validateCode); 98 sb.append("">" + url + "?username="); 99 sb.append(username); 100 sb.append("&email="); 101 sb.append(email); 102 sb.append("&validateCode="); 103 sb.append(validateCode); 104 sb.append("</a>"); 105 return sb.toString(); 106 } 107 108 }
以下是两种不同加密方式的代码，与上面默认25端口的方式差别较小，注意不同加密方式红色部分。
1. JavaMail – via TLS
1 package com.mkyong.common; 2 3 import java.util.Properties; 4 5 import javax.mail.Message; 6 import javax.mail.MessagingException; 7 import javax.mail.PasswordAuthentication; 8 import javax.mail.Session; 9 import javax.mail.Transport; 10 import javax.mail.internet.InternetAddress; 11 import javax.mail.internet.MimeMessage; 12 13 public class SendMailTLS { 14 15 public static void main(String[] args) { 16 17 final String username = "username@gmail.com"; 18 final String password = "password"; 19 20 Properties props = new Properties(); 21 props.put("mail.smtp.auth", "true"); 22 props.put("mail.smtp.starttls.enable", "true"); 23 props.put("mail.smtp.host", "smtp.gmail.com"); 24 props.put("mail.smtp.port", "587"); 25 26 Session session = Session.getInstance(props, 27 new javax.mail.Authenticator() { 28 protected PasswordAuthentication getPasswordAuthentication() { 29 return new PasswordAuthentication(username, password); 30 } 31 }); 32 33 try { 34 Message message = new MimeMessage(session); 35 message.setFrom(new InternetAddress("from-email@gmail.com")); 36 message.setRecipients(Message.RecipientType.TO, 37 InternetAddress.parse("to-email@gmail.com")); 38 message.setSubject("Testing Subject"); 39 message.setText("Dear Mail Crawler," 40 + " No spam to my email, please!"); 41 42 Transport.send(message); 43 System.out.println("Done"); 44 45 } catch (MessagingException e) { 46 throw new RuntimeException(e); 47 } 48 } 49 }
2. JavaMail – via SSL
package com.mkyong.common; import java.util.Properties; import javax.mail.Message; import javax.mail.MessagingException; import javax.mail.PasswordAuthentication; import javax.mail.Session; import javax.mail.Transport; import javax.mail.internet.InternetAddress; import javax.mail.internet.MimeMessage; public class SendMailSSL { public static void main(String[] args) { Properties props = new Properties(); props.put("mail.smtp.host", "smtp.gmail.com"); props.put("mail.smtp.socketFactory.port", "465"); props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory"); props.put("mail.smtp.auth", "true"); props.put("mail.smtp.port", "465"); Session session = Session.getDefaultInstance(props, new javax.mail.Authenticator() { protected PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication("username","password"); } }); try { Message message = new MimeMessage(session); message.setFrom(new InternetAddress("from@no-spam.com")); message.setRecipients(Message.RecipientType.TO, InternetAddress.parse("to@no-spam.com")); message.setSubject("Testing Subject"); message.setText("Dear Mail Crawler," + " No spam to my email, please!"); Transport.send(message); System.out.println("Done"); } catch (MessagingException e) { throw new RuntimeException(e); } } }
注意：如果以上ssl不行可以尝试将ssl红色部分用以下代码替换：
1 MailSSLSocketFactory sf = null; 2 try { 3 sf = new MailSSLSocketFactory(); 4 sf.setTrustAllHosts(true); 5 } catch (GeneralSecurityException e1) { 6 e1.printStackTrace(); 7 } 8 props.put("mail.smtp.ssl.enable", "true"); 9 props.put("mail.smtp.ssl.socketFactory", sf);