1、配置依赖
<dependency><groupId>javax.mail</groupId><artifactId>mail</artifactId><version>1.4.7</version></dependency>
2、工具类
package com.thorgene.clinical.utils;import java.io.IOException;import java.io.InputStream;import java.io.UnsupportedEncodingException;import java.util.ArrayList;import java.util.Date;import java.util.List;import java.util.Properties;import javax.activation.DataHandler;import javax.activation.FileDataSource;import javax.mail.Address;import javax.mail.Authenticator;import javax.mail.MessagingException;import javax.mail.Multipart;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;import javax.mail.internet.MimeUtility;public class MailUtil {private static final String ALIDM_SMTP_HOST = "smtp.企业域名.com";private static final int ALIDM_SMTP_PORT = 25;// 或80private static String user; //发件人的账号private static String password;//发件人的密码private static String receiveUser; //收件人private static String ccUser; //抄送人//配置文件读取static {InputStream is = MailUtil.class.getResourceAsStream("/application.properties");Properties prop = new Properties();try {prop.load(is);} catch (IOException e1) {e1.printStackTrace();}user = prop.getProperty("mail.user");password = prop.getProperty("mail.password");receiveUser = prop.getProperty("mail.receiveUser");ccUser = prop.getProperty("User");}public static void main(String[] args) {List<String> fileList = new ArrayList<String>();fileList.add("/private/tmp/11111.docx");fileList.add("/private/tmp/22222.docx");send("测试主题", "测试正文", fileList);}/*** 发送邮件* @param toEmail 收件人邮箱地址* @param subject 邮件标题* @param content 邮件内容 可以是html内容* @param filePath 附加路径 */public static void send(String subject, String content, List<String> fileList) {Session mailSession = loadMailSession();//获取session，设置发送邮件属性mailSession.setDebug(true);// 创建邮件消息MimeMessage message = new MimeMessage(mailSession);try {// 设置发件人message.setFrom(new InternetAddress(user));//可选，设置回信地址Address[] a = new Address[1];a[0] = new InternetAddress(user);message.setReplyTo(a);// 设置收件人//InternetAddress to = new InternetAddress("xxxx@");//message.setRecipient(MimeMessage.RecipientType.TO, to);//如果同时发给多人，才将上面两行替换为如下（因为部分收信系统的一些限制，尽量每次投递给一个人；同时我们限制单次允许发送的人数是30人）String[] receives = receiveUser.split(",");InternetAddress[] adds = new InternetAddress[receives.length];for (int i = 0; i < adds.length; i++) {adds[i] = new InternetAddress(receives[i]);}message.setRecipients(MimeMessage.RecipientType.TO, adds);// 设置多个抄送地址//if(null != ccUser && !ccUser.isEmpty()){// @SuppressWarnings("static-access")// InternetAddress[] internetAddressCC = new InternetAddress().parse(ccUser);// message.setRecipients(, internetAddressCC);//}Multipart multipart = new MimeMultipart();MimeBodyPart mbpContent = new MimeBodyPart();mbpContent.setText(content);multipart.addBodyPart(mbpContent);//往邮件中添加附件 for (int i = 0; i < fileList.size(); i++) {MimeBodyPart mbpFile = new MimeBodyPart();FileDataSource fds = new FileDataSource(fileList.get(i));mbpFile.setDataHandler(new DataHandler(fds));try {mbpFile.setFileName(MimeUtility.encodeText(fds.getName()));} catch (UnsupportedEncodingException e) {// TODO Auto-generated catch blocke.printStackTrace();}multipart.addBodyPart(mbpFile);}message.setContent(multipart);message.setSentDate(new Date());// 设置邮件标题message.setSubject(subject);// 发送邮件Transport.send(message);} catch (MessagingException e) {String err = e.getMessage();// 在这里处理message内容， 格式是固定的System.out.println(err);}}/*** 获取session，设置发送邮件属性* @return*/private static Session loadMailSession() {try {// 配置发送邮件的环境属性final Properties props = new Properties();// 表示SMTP发送邮件，需要进行身份验证props.put("mail.smtp.auth", "true");props.put("mail.smtp.host", ALIDM_SMTP_HOST);// props.put("mail.smtp.port", ALIDM_SMTP_PORT);// 如果使用ssl，则去掉使用25端口的配置，进行如下配置,props.put("mail.smtp.socketFactory.class",".ssl.SSLSocketFactory");props.put("mail.smtp.socketFactory.port", "465");props.put("mail.smtp.port", "465");// 发件人的账号props.put("mail.user", user);// 访问SMTP服务时需要提供的密码props.put("mail.password", password);// 构建授权信息，用于进行SMTP进行身份验证Authenticator authenticator = new Authenticator() {@Overrideprotected PasswordAuthentication getPasswordAuthentication() {// 用户名、密码String userName = props.getProperty("mail.user");String password = props.getProperty("mail.password");return new PasswordAuthentication(userName, password);}};// 使用环境属性和授权信息，创建邮件会话return Session.getInstance(props, authenticator);} catch (Exception e) {e.printStackTrace();System.out.println("mail session is null");}return null;}}
