首先：
我们准备工作需要准备
jar包 mail.jar，comms-email-1.5.jar，activation.jar
POP3/SMTP服务 以qq为例
发送邮箱的账号 *********[email protected]
发送邮箱授权码 获取流程如下
进入邮箱，点击设置
拉到最后，将POP3服务开启
之后生成授权码
获取授权码
这样 准备工作基本完成就可以写代码了
这是自己写的一个工具类，注释也加上了，虽然自带debug信息，但是那个比较多，所以在每个方法中打印输出了一下，默认使用的是qq的邮箱，更改至于要修改相应位置的属性就行
import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.Address;
import javax.mail.Authenticator;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.internet.MimeUtility;
/**
*
* 项目名称：JavaMail
* 类名称：SendMail
* 类描述：
* 创建人：Ai
* 创建时间：2018年5月2日 下午3:49:45
* 修改人：Ai
* 修改时间：2018年5月2日 下午3:49:45
* 修改备注：javaMail封装代码
* @version JM-0.1
*
*/
public class SendMail {
private final String username = "*****@qq.com"; //发送邮件的邮箱
private final String password = "*********"; //发送邮箱的授权码
private Authenticator auth = null;
private MimeMessage mimeMessage = null;
private Properties pros = null;
private Multipart multipart = null;
private BodyPart bodypart = null;
/**
* 初始化账号密码并验证 创建MimeMessage对象 发送邮件必须的步骤:1
*
* @param username
* @param password
*/
public SendMail() {
Map<String, String> map = new HashMap<String, String>();
// 你的发送邮箱账号 POP3/SMTP服务 授权码
map.put("mail.smtp.host", "smtp.qq.com");
map.put("mail.smtp.auth", "true");
map.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
map.put("mail.smtp.port", "465");
map.put("mail.smtp.socketFactory.port", "465");
setPros(map);
initMessage();
}
/**
* 设置email系统参数 接收一个map集合key为string类型，值为String 发送邮件必须的步骤:2
*
* @param map
*/
public boolean setPros(Map<String, String> map) {
pros = new Properties();
try {
for (Map.Entry<String, String> entry : map.entrySet()) {
pros.setProperty(entry.getKey(), entry.getValue());
}
System.out.println("设置email参数成功!");
return true;
} catch (Exception e) {
return false;
}
}
/**
* 初始化MimeMessage对象 发送邮件必须的步骤:3
*/
public boolean initMessage() {
this.auth = new Email_Autherticator();
try {
Session session = Session.getDefaultInstance(pros, auth);
session.setDebug(false); // 设置获取 debug 信息
mimeMessage = new MimeMessage(session);
System.out.println("初始化成功!");
return true;
} catch (Exception e) {
return false;
}
}
/**
* 验证账号密码 发送邮件必须的步骤
*
* @author Administrator
*
*/
public class Email_Autherticator extends Authenticator {
public PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(username, password);
}
}
/**
* 设置发送邮件的基本参数(去除繁琐的邮件设置)
*
* @param sub
* 设置邮件主题
* @param text
* 设置邮件文本内容
* @param rec
* 设置邮件接收人
* @throws MessagingException
* @throws UnsupportedEncodingException
*/
public boolean setDefaultMessagePros(String sub, String text, String rec)
throws MessagingException, UnsupportedEncodingException {
try {
mimeMessage.setSubject(sub);
mimeMessage.setText(text);
mimeMessage.setRecipient(Message.RecipientType.TO, new InternetAddress(rec));
mimeMessage.setSentDate(new Date());
mimeMessage.setFrom(new InternetAddress(username, username));
System.out.println("设置邮件发送基本参数成功!（主题、内容、接收人）");
return true;
} catch (Exception e) {
return false;
}
}
/**
* 设置主题
*
* @param subject
* @throws MessagingException
*/
public boolean setSubject(String subject) throws MessagingException {
try {
mimeMessage.setSubject(subject);
System.out.println("设置邮件主题[" + subject + "]成功!");
return true;
} catch (Exception e) {
return false;
}
}
/**
* 设置日期
*
* @param date
* 邮件发送的日期
* @throws MessagingException
*/
public boolean setDate(Date date) throws MessagingException {
try {
mimeMessage.setSentDate(date);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String format = sdf.format(date);
System.out.println("设置邮件发送日期[" + format + "]成功!");
return true;
} catch (Exception e) {
return false;
}
}
/**
* 设置日期
*
* @param millisecond
* 邮件延时发送时间(毫秒) //暂不好使
* @throws MessagingException
*/
public boolean setDate(long millisecond) throws MessagingException {
Date date = new Date();
System.out.println(date);
date.setTime(date.getTime() + millisecond);
try {
mimeMessage.setSentDate(date);
System.out.println("设置邮件发送延时[" + millisecond + "]毫秒成功!");
} catch (Exception e) {
System.out.println("设置邮件发送日期[" + millisecond + "]失败!");
return false;
}
return true;
}
/**
* 设置邮件接收人地址 <单人发送>
*
* @param recipient
* @throws MessagingException
*/
public boolean setRecipient(String recipient) throws MessagingException {
try {
if (recipient.isEmpty()) {
System.out.println("接收人地址为空!");
return false;
} else {
mimeMessage.setRecipient(Message.RecipientType.TO, new InternetAddress(recipient));
System.out.println("设置接收人地址为[" + recipient + "]成功!");
return true;
}
} catch (Exception e) {
return false;
}
}
/**
* 设置邮件接收人地址 <多人发送>
*
* @param list
* @throws MessagingException
* @throws AddressException
*/
public boolean setRecipients(List<String> recs) throws AddressException, MessagingException {
try {
if (recs.isEmpty()) {
System.out.println("接收人地址为空!");
return false;
}
for (String str : recs) {
mimeMessage.addRecipient(Message.RecipientType.TO, new InternetAddress(str));
}
System.out.println("设置接收人地址" + recs + "成功!");
return true;
} catch (Exception e) {
return false;
}
}
/**
* 设置邮件接收人地址 <多人发送>
*
* @param StringBuffer<parms,parms2,parms.....>
* @throws MessagingException
* @throws AddressException
*/
@SuppressWarnings("static-access")
public boolean setRecipients(StringBuffer sb) throws AddressException, MessagingException {
try {
if (sb == null || "".equals(sb)) {
System.out.println("字符串数据为空!");
return false;
}
Address[] address = new InternetAddress().parse(sb.toString());
mimeMessage.addRecipients(Message.RecipientType.TO, address);
System.out.println("设置接收人地址[" + sb + "]成功!");
return true;
} catch (Exception e) {
return false;
}
}
/**
* 设置邮件发送人的名字
*
* @param from
* @throws UnsupportedEncodingException
* @throws MessagingException
*/
public boolean setFrom(String from) throws UnsupportedEncodingException, MessagingException {
try {
if (from.isEmpty()) {
System.out.println("邮件发送人名字为空!");
return false;
} else {
mimeMessage.setFrom(new InternetAddress(username, from));
System.out.println("设置邮件发送人名字[" + from + "]成功!");
return true;
}
} catch (Exception e) {
return false;
}
}
/**
* 发送邮件<单人发送> return 是否发送成功
*
* @throws MessagingException
* 发送异常
*/
public boolean sendMessage() {
try {
Transport.send(mimeMessage);
System.out.println("----------------发送成功----------------");
return true;
} catch (MessagingException e) {
return false;
}
}
/**
* 设置附件
*
* @param file
* 发送文件的路径
* @throws MessagingException
* 发送异常
* @throws IOException
* 文件IO异常
*
*/
public boolean setMultipart(String file) throws MessagingException, IOException {
try {
if (multipart == null) {
multipart = new MimeMultipart();
}
multipart.addBodyPart(writeFiles(file));
mimeMessage.setContent(multipart);
System.out.println("设置邮件附件" + file + "成功!");
return true;
} catch (Exception e) {
return false;
}
}
/**
* 设置附件<添加多附件>
*
* @param fileList<接收List集合>
* @throws MessagingException
* 发送异常
* @throws IOException
* 文件IO异常
*/
public boolean setMultiparts(List<String> fileList) throws MessagingException, IOException {
try {
if (multipart == null) {
multipart = new MimeMultipart();
}
for (String s : fileList) {
multipart.addBodyPart(writeFiles(s));
}
mimeMessage.setContent(multipart);
System.out.println("设置邮件附件" + fileList + "成功!");
return true;
} catch (Exception e) {
return false;
}
}
/**
* 发送文本内容，设置编码方式 <方法与发送附件配套使用> <发送普通的文本内容请使用setText()方法>
*
* @param s
* 发送的文本内容
* @param type
* 编码格式
* @throws MessagingException
*/
public boolean setContent(String s, String type) throws MessagingException {
try {
if (multipart == null) {
multipart = new MimeMultipart();
}
bodypart = new MimeBodyPart();
bodypart.setContent(s, type);
multipart.addBodyPart(bodypart);
mimeMessage.setContent(multipart);
mimeMessage.saveChanges();
System.out.println("设置邮件内容[" + s + "]成功!");
return true;
} catch (Exception e) {
return false;
}
}
/**
* 读取附件
*
* @param filePath
* 文件路径
* @return
* @throws IOException
* @throws MessagingException
*/
public BodyPart writeFiles(String filePath) throws IOException, MessagingException {
File file = new File(filePath);
if (!file.exists()) {
throw new IOException("文件不存在!请确定文件路径是否正确");
}
bodypart = new MimeBodyPart();
DataSource dataSource = new FileDataSource(file);
bodypart.setDataHandler(new DataHandler(dataSource));
// 文件名要加入编码，不然出现乱码
bodypart.setFileName(MimeUtility.encodeText(file.getName()));
return bodypart;
}
//----------------------------------------------------------------------------------------------------------------------------
public static void main(String[] args) throws MessagingException, IOException {
SendMail mail = new SendMail();
/*
* 调用setRecipients(list);发送list集合类型 List<String> list = new
* ArrayList<String>(); list.add("********@qq.com");
*/
List<String> list = new ArrayList<String>();
list.add("[email protected]");
mail.setRecipients(list); // 输出信息
// 邮件主题
mail.setSubject("AI测试Java邮箱功能");
// 发送时间 Date类型(默认即时发送)
mail.setDate(new Date());
//mail.setDate(100);
// 发送者昵称
mail.setFrom("AI");
// 邮件内容
mail.setContent("你的验证码为:<a>365415778</a>", "text/html; charset=UTF-8");
// 附件集合
List<String> fileList = new ArrayList<String>();
// 添加附件
fileList.add("D:1.jpg");
mail.setMultiparts(fileList);
mail.sendMessage(); // 是否发送成功
}
}