关于javaMail发送邮件的详细教程可以看Java 发送邮件(菜鸟教程)本文的基础代码也来自这里。

关于实现的效果图如下

Snipaste_2020-03-25_18-05-06.png

Snipaste_2020-03-25_18-06-44.png

Snipaste_2020-03-25_18-09-25.png

Snipaste_2020-03-25_18-12-12.png

在网上看到有说发送QQ邮箱需要添加SSL加密的代码

// 关于QQ邮箱，还要设置SSL加密，加上以下代码即可

MailSSLSocketFactory sf = new MailSSLSocketFactory();

sf.setTrustAllHosts(true);

props.put("mail.smtp.ssl.enable", "true");

props.put("mail.smtp.ssl.socketFactory", sf);

但在测试的时候发现不用开启SSL加密也能发送成功。

如何添加多个收件人

InternetAddress[] addArr = null;

// 设置收件人

addArr = new InternetAddress[toList.size()];

for (int i = 0; i < toList.size(); i++) {

String mailtoString = (String) toList.get(i);

addArr[i] = new InternetAddress(mailtoString);

}

message.setRecipients(Message.RecipientType.TO, addArr); // 设置收件人地址

抄送人和密送人类似，更改Message.RecipientType.TO为Message.RecipientType.CC(抄送)和Message.RecipientType.BCC(密送即可)

如何发送附件

需要在创建MimeMessage对象后

// 创建默认的 MimeMessage 对象

MimeMessage message = new MimeMessage(session);

设置消息体的文件数据

代码如下

// 带有附件的邮件发送

MimeMultipart multi = new MimeMultipart();

BodyPart bodyPartText = new MimeBodyPart();

bodyPartText.setText(messageContent); // 设置邮件内容

multi.addBodyPart(bodyPartText);

String fileName = null;

for (int i = 0; i < fileList.size(); i++) {

fileName = (String) fileList.get(i);

FileDataSource fds = new FileDataSource(fileName);

BodyPart fileBodyPart = new MimeBodyPart();

fileBodyPart.setDataHandler(new DataHandler(fds)); // 设置附件文件数据

fileBodyPart.setFileName(fds.getName()); // 设置附件文件名称

multi.addBodyPart(fileBodyPart);

}

message.setContent(multi);

发送邮件的整体代码

import java.io.UnsupportedEncodingException;

import java.util.Date;

import java.util.Properties;

import java.util.Vector;

import javax.activation.DataHandler;

import javax.activation.FileDataSource;

import javax.mail.Authenticator;

import javax.mail.BodyPart;

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.MimeBodyPart;

import javax.mail.internet.MimeMessage;

import javax.mail.internet.MimeMultipart;

/**

* 发送邮件服务

*

* @author lxh96

*

*/

public class SendEmailService {

private String mailServerPort = "25"; // 默认端口号

/**

* 发送邮件，验证用户权限

*

* @param smtpHost 邮箱服务器

* @param mailServerPort 邮箱服务器端口

* @param mailFrom 发送方邮箱地址

* @param toList 收件方邮箱集合

* @param ccList 抄送邮箱地址集合

* @param bbList 密送邮箱地址集合

* @param subJect 邮件主题

* @param messageStr 邮件内容

* @param fileList 附件路径集合

* @return

* @throws UnsupportedEncodingException

*/

public int authSend(String userName, String password, String smtpHost, String serverPort, String mailFrom,

Vector toList, Vector ccList, Vector bccList, String subJect, String messageContent, Vector fileList)

throws UnsupportedEncodingException {

// 获取系统属性

Properties properties = System.getProperties();

// 设置邮件服务器

properties.setProperty("mail.smtp.host", smtpHost);

// 设置端口

properties.setProperty("mail.smtp.port", mailServerPort);

// 设置邮箱是否需要验证

properties.setProperty("mail.smtp.auth", "true");

// 获取默认session对象

Session session = Session.getDefaultInstance(properties, new Authenticator() {

public PasswordAuthentication getPasswordAuthentication() {

return new PasswordAuthentication(userName, password); // qq邮箱用户名 密码(qq为授权码) --用于登录邮箱服务器的用户名密码

}

});

session.setDebug(false); // 是否开启debug模式，用于调试

try {

// 创建默认的 MimeMessage 对象

MimeMessage message = new MimeMessage(session);

// Set From: 头部头字段

message.setFrom(new InternetAddress(mailFrom, "nickName")); // 发件人名称可以不设置

InternetAddress[] addArr = null;

// 设置收件人

addArr = new InternetAddress[toList.size()];

for (int i = 0; i < toList.size(); i++) {

String mailtoString = (String) toList.get(i);

addArr[i] = new InternetAddress(mailtoString);

}

message.setRecipients(Message.RecipientType.TO, addArr); // 设置收件人地址

// 设置抄送人地址

if ((ccList != null) && (ccList.size() != 0)) {

addArr = new InternetAddress[ccList.size()];

for (int i = 0; i < ccList.size(); i++) {

String ccMailStr = (String) ccList.get(i);

addArr[i] = new InternetAddress(ccMailStr);

}

message.setRecipients(Message.RecipientType.CC, addArr); // 设置抄送人地址

}

// 设置密送人地址

if ((bccList != null) && (bccList.size() != 0)) {

addArr = new InternetAddress[bccList.size()];

for (int i = 0; i < bccList.size(); i++) {

String bccMailStr = (String) bccList.get(i);

addArr[i] = new InternetAddress(bccMailStr);

}

message.setRecipients(Message.RecipientType.BCC, addArr); // 设置密送人地址

}

// Set Subject: 头部头字段

message.setSubject(subJect);

if ((fileList == null) || (fileList.size() == 0)) { // 没有附件

// 设置消息体

message.setText(messageContent);

} else {

// 带有附件的邮件发送

MimeMultipart multi = new MimeMultipart();

BodyPart bodyPartText = new MimeBodyPart();

bodyPartText.setText(messageContent); // 设置邮件内容

multi.addBodyPart(bodyPartText);

String fileName = null;

for (int i = 0; i < fileList.size(); i++) {

fileName = (String) fileList.get(i);

FileDataSource fds = new FileDataSource(fileName);

BodyPart fileBodyPart = new MimeBodyPart();

fileBodyPart.setDataHandler(new DataHandler(fds)); // 设置附件文件数据

fileBodyPart.setFileName(fds.getName()); // 设置附件文件名称

multi.addBodyPart(fileBodyPart);

}

message.setContent(multi);

}

message.setSentDate(new Date()); // 邮件邮件发送时间

message.saveChanges();

long btime = System.currentTimeMillis();

// 发送消息

Transport.send(message);

long etime = System.currentTimeMillis();

String sendmessage = "发件人："+mailFrom+"发送成功\n收件人:"+toList+"\n";

if (ccList != null && ccList.size() != 0) {

sendmessage += "抄送人："+ccList+"\n";

}

if (bccList != null && bccList.size() != 0) {

sendmessage += "密送人："+bccList+"\n";

}

sendmessage += "用时："+(etime - btime)+"ms";

System.out.println("Sent message successfully....\n"+sendmessage);

} catch (MessagingException mex) {

mex.printStackTrace();

return 1;

}

return 0;

}

public void setMailServerPort(String mailServerPort) {

this.mailServerPort = mailServerPort;

}

}

测试类

import java.io.UnsupportedEncodingException;

import java.util.Vector;

import mail.service.SendEmailService;

/**

* 发送邮件测试

*

* @author lxh96

*

*/

public class SendEmail {

public static void main(String[] args) {

SendEmailService sendEmail = new SendEmailService();

String userName = "34**9@qq.com";

String password = "QQ邮箱授权码或者其他登陆邮箱密码";

String smtpHost = "smtp.qq.com";

String serverPort = "465";

String mailFrom = "34**9@qq.com";

Vector toList = new Vector() ;

toList.addElement("*****4@163.com");

toList.addElement("56***7@qq.com");

Vector ccList = new Vector();

ccList.addElement("56**7@qq.com");

Vector bccList = new Vector();

bccList.addElement("*****@163.com");

String subJect = "hello 测试";

String messageContent = "hello ,我是一个javamail的测试邮件";

Vector fileList = new Vector();

fileList.addElement("C:\\Users\\lxh96\\Pictures\\B01.jpg");

fileList.addElement("C:\\Users\\lxh96\\Pictures\\unnamed.jpg");

try {

sendEmail.authSend(userName, password, smtpHost, serverPort, mailFrom, toList, ccList, bccList, subJect,

messageContent, fileList);

} catch (UnsupportedEncodingException e) {

// TODO Auto-generated catch block

e.printStackTrace();

System.out.println("邮件发送失败");

}

}

}

能够实现简单邮件多人发送、多人抄送、密送和多附件的发送功能。可能需要根据不同的邮件发送服务器修改或添加相应的properties配置，但应该大同小异。