使用java mail 发送邮件
1.关联jar包: activation.jar mail.jar
2.调用
@Test public void test1() { List<String> imageUrlList = Arrays.asList(new String[] { "src/美女1.jpg", "src/2.jpg", "src/2.jpg" }); List<String> attachmentUrlList = Arrays.asList(new String[] { "src/光辉岁月.MP3", "src/美女1.jpg", "src/2.jpg" }); MailInfo mailInfo = new MailInfo("us0911@126.com", "subject", "content"); mailInfo.setImageUrlList(imageUrlList); MailUtils.getInstance().sendMail(mailInfo); }
3.封装代码
3.1配置文件: src/mailConfig.properties
#邮件发送服务器地址: 比如126邮件地址为 smtp.126.com mail.smtp.host = localhost #发件人账户 emailAddress = a@bvb.de #发件人密码 password = a
3.2 实体类
package de.bvb.utils; import java.util.List; public class MailInfo { private String to; private String subject; private String content; private List<String> imageUrlList; private List<String> attachmentUrlList; public MailInfo() { super(); } public MailInfo(String to, String subject, String content) { super(); this.to = to; this.subject = subject; this.content = content; } public String getTo() { return to; } public void setTo(String to) { this.to = to; } public String getSubject() { return subject; } public void setSubject(String subject) { this.subject = subject; } public String getContent() { return content; } public void setContent(String content) { this.content = content; } public List<String> getImageUrlList() { return imageUrlList; } public void setImageUrlList(List<String> imageUrlList) { this.imageUrlList = imageUrlList; } public List<String> getAttachmentUrlList() { return attachmentUrlList; } public void setAttachmentUrlList(List<String> attachmentUrlList) { this.attachmentUrlList = attachmentUrlList; } }
package de.bvb.utils; import java.io.IOException; import java.io.UnsupportedEncodingException; import java.security.MessageDigest; import java.util.List; import java.util.Properties; import javax.activation.DataHandler; import javax.activation.FileDataSource; import javax.mail.Message; import javax.mail.MessagingException; 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 MailUtils { /////////////////////////////////////////////////////////////// //单例模式////////////////////////////////////////////////////// private static MailUtils instance; private MailUtils() { } public static MailUtils getInstance() { if (instance == null) { instance = new MailUtils(); } return instance; } //单例模式////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////// private static Session session; private static String emailAddress; private static String username; private static String password; // 配置文件路径: src/mailConfig.properties static { try { Properties props = new Properties(); props.setProperty("mail.transport.protocol", "smtp"); props.setProperty("mail.smtp.auth", "true"); props.load(MailUtils.class.getClassLoader().getResourceAsStream("mailConfig.properties")); emailAddress = props.getProperty("emailAddress"); username = emailAddress.split("\\@")[0]; password = props.getProperty("password"); session = Session.getInstance(props); //session.setDebug(true);//启动调试,控制台打印交互信息 } catch (IOException e) { e.printStackTrace(); } } public boolean sendMail(MailInfo info) { if (info == null) { throw new RuntimeException("信息不全"); } try { Message message = createMail(info); Transport transport = session.getTransport(); transport.connect(username, password); transport.sendMessage(message, message.getAllRecipients()); transport.close(); System.out.println("发送成功"); return true; } catch (Exception e) { throw new RuntimeException(e); } } private Message createMail(MailInfo info) throws MessagingException, UnsupportedEncodingException { if (info == null) { return null; } //创建邮件 MimeMessage message = new MimeMessage(session); message.setFrom(new InternetAddress(emailAddress)); message.setRecipient(Message.RecipientType.TO, new InternetAddress(info.getTo())); message.setSubject(info.getSubject()); MimeMultipart root = new MimeMultipart(); MimeMultipart contentImageMM = new MimeMultipart(); StringBuilder main = new StringBuilder(info.getContent()); //创建图片 List<String> imageUrlList = info.getImageUrlList(); if (imageUrlList != null && imageUrlList.size() > 0) { for (String imageUrl : imageUrlList) { String cid = generatorMD5(imageUrl); //id需要唯一,md5处理一把 MimeBodyPart image1 = new MimeBodyPart(); image1.setContentID(cid); image1.setDataHandler(new DataHandler(new FileDataSource(imageUrl))); main.append("<br/><img src='cid:").append(cid).append("'>"); contentImageMM.addBodyPart(image1); } } //描述数据之间的关系(正文和图片) 在封装到MimeBodyPart中去 MimeBodyPart content = new MimeBodyPart(); content.setContent(main.toString(), "text/html;charset=UTF-8"); contentImageMM.addBodyPart(content); contentImageMM.setSubType("related"); MimeBodyPart contentImage = new MimeBodyPart(); contentImage.setContent(contentImageMM); //创建附件 List<String> attachmentUrlList = info.getAttachmentUrlList(); if (attachmentUrlList != null && attachmentUrlList.size() > 0) { for (String attachmentUrl : attachmentUrlList) { MimeBodyPart attachment1 = new MimeBodyPart(); DataHandler handler1 = new DataHandler(new FileDataSource(attachmentUrl)); attachment1.setDataHandler(handler1); attachment1.setFileName(MimeUtility.encodeText(handler1.getName())); root.addBodyPart(attachment1); } } //描述数据之间的关系(把正文和图片封装后的MimeBodyPart,再和附件封装) root.addBodyPart(contentImage); contentImageMM.setSubType("mixed"); //封装保存数据 message.setContent(root); message.saveChanges(); return message; } private String generatorMD5(String pwd) { //用于加密的字符 char md5String[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' }; try { //使用平台的默认字符集将此 String 编码为 byte序列，并将结果存储到一个新的 byte数组中 byte[] btInput = pwd.getBytes(); //信息摘要是安全的单向哈希函数，它接收任意大小的数据，并输出固定长度的哈希值。 MessageDigest mdInst = MessageDigest.getInstance("MD5"); //MessageDigest对象通过使用 update方法处理数据， 使用指定的byte数组更新摘要 mdInst.update(btInput); // 摘要更新之后，通过调用digest（）执行哈希计算，获得密文 byte[] md = mdInst.digest(); // 把密文转换成十六进制的字符串形式 int j = md.length; char str[] = new char[j * 2]; int k = 0; for (int i = 0; i < j; i++) { // i = 0 byte byte0 = md[i]; //95 str[k++] = md5String[byte0 >>> 4 & 0xf]; // 5 str[k++] = md5String[byte0 & 0xf]; // F } //返回经过加密后的字符串 return new String(str); } catch (Exception e) { return null; } } }
