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<String> toList, Vector<String> ccList, Vector<String> 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<String> toList = new Vector<String>() ;
toList.addElement("*****4@163.com");
toList.addElement("56***7@qq.com");
Vector<String> ccList = new Vector<String>();
ccList.addElement("56**7@qq.com");
Vector<String> bccList = new Vector<String>();
bccList.addElement("*****@163.com");
String subJect = "hello 测试";
String messageContent = "hello ,我是一个javamail的测试邮件";
Vector<String> fileList = new Vector<String>();
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。
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