一、一般配置
发送邮件需要用到 mail包 maven 依赖如下：
1 23 javax.mail 41.4 6
SSL加密方式需要用到MailSSLSocketFactory类
com.sun.mail
javax.mail
1.4.4
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("" + 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("");
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("" + 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("");
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 = "[email protected]";
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("[email protected]"));
36 message.setRecipients(Message.RecipientType.TO,
37 InternetAddress.parse("[email protected]"));
38 message.setSubject("Testing Subject");
39 message.setText("Dear Mail Crawler,"
40 + "\n\n 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("[email protected]"));
message.setRecipients(Message.RecipientType.TO,
InternetAddress.parse("[email protected]"));
message.setSubject("Testing Subject");
message.setText("Dear Mail Crawler," +
"\n\n 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);