JavaMail邮件发送

1.方式一：SpringBoot整合JavaMailSender

1.yml配置提取

 application:  mail:smtp:#服务器主机名host: smtp.qq.com#服务器端口 port: 465#你的邮箱地址username: 5XXXxxxx1@qq.com#你的授权码password: xxxxx#编码格式defaultEncoding: utf-8#是否进行用户名密码校验auth: true#设置超时时间timeout: 20000#是否启用sslssl-enabled: true

/*** 邮件配置* @author li*/@Data
@ConfigurationProperties(prefix = "application.mail.smtp")
public class MailOptionProperties {/*** 服务器主机名*/private String host;/*** 服务器发送端口*/private String port;/*** 邮箱地址*/private String username;/*** 授权码*/private String password;/*** 编码格式*/private String defaultEncoding;/*** 是否进行用户名密码校验*/private String auth;/*** 设置超时时间*/private String timeout;/*** ssl启用*/private boolean sslEnabled;}

2.config配置

/*** 邮件配置* @author li*/@Configuration
@EnableConfigurationProperties({MailOptionProperties.class})
public class JavaMailConfig {@Autowiredprivate MailOptionProperties mailOptionProperties;@Beanpublic JavaMailSender javaMailSender() throws GeneralSecurityException {JavaMailSenderImpl javaMailSender = new JavaMailSenderImpl();javaMailSender.setHost(mailOptionProperties.getHost());javaMailSender.setUsername(mailOptionProperties.getUsername());javaMailSender.setDefaultEncoding(mailOptionProperties.getDefaultEncoding());javaMailSender.setPassword(mailOptionProperties.getPassword());Properties properties = new Properties();//开启认证properties.setProperty("mail.smtp.auth", mailOptionProperties.getAuth());//设置链接超时properties.setProperty("mail.smtp.timeout", mailOptionProperties.getTimeout());//启用调试properties.setProperty("mail.debug", "true");//设置端口properties.setProperty("mail.smtp.port", mailOptionProperties.getPort());//是否启用sslif(mailOptionProperties.getSslEnabled()){//设置ssl端口properties.setProperty("mail.smtp.socketFactory.port", mailOptionProperties.getPort());properties.setProperty("mail.smtp.socketFactory.fallback", "false");properties.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");//设置ssl加密MailSSLSocketFactory sf = new MailSSLSocketFactory();sf.setTrustAllHosts(true);properties.put("mail.smtp.ssl.enable", mailOptionProperties.getSslEnabled());properties.put("mail.smtp.ssl.socketFactory", sf);}javaMailSender.setJavaMailProperties(properties);return javaMailSender;}}

3.工具类

import java.io.File;
import java.util.Date;
import java.util.List;/*** mail邮件消息封装* @author li*/
@Data
public class MailMessage {/*** 收件人邮箱地址集合*/private List<String> recipient;/*** 抄送人*/private String [] cc;/*** 密送人*/private String [] bcc;/*** 发送时间*/private Date sendDate;/*** 邮件主题*/private String subject;/*** 邮件文本内容*/private String text;/*** 是否html格式打开*/private boolean isHtml = true;/*** 附件集合*/private List<File> fileList;}

import java.io.InputStream;/*** 文件数据封装*/
@Data
public class FileData {private InputStream inputStream;private String fileName;public FileData() {}public FileData(InputStream inputStream, String fileName) {this.inputStream = inputStream;this.fileName = fileName;}}

/*** 邮件发送工具类** @author li* @date 2024-05-14*/
@Component
@EnableConfigurationProperties({MailOptionProperties.class})
public class JavaMailOperation {static {//防止附件名太长被截断System.getProperties().setProperty("mail.mime.splitlongparameters", "false");}@Autowiredprivate JavaMailSender javaMailSender;/*** 发件人邮箱地址*/@Autowiredprivate MailOptionProperties mailOptionProperties;/*** 邮件发送** @param text         内容* @param subject      标题* @param emailAddress 收件人*/public MimeMessageHelper createMessageHelper(MimeMessage message, String subject, String text, String emailAddress) throws Exception {MimeMessageHelper messageHelper = new MimeMessageHelper(message, true, "UTF-8");// 发件人messageHelper.setFrom(new InternetAddress(mailOptionProperties.getUsername(), mailOptionProperties.getPersonal(), "UTF-8"));// 收件人邮箱messageHelper.setTo(new InternetAddress(emailAddress));// 邮件的主题messageHelper.setSubject(subject);// 邮件的文本内容，true表示文本以html格式打开messageHelper.setText(text, true);return messageHelper;}/*** 邮件发送** @param text         内容* @param subject      标题* @param emailAddress 收件人* @param cc           抄送* @param bcc          密送*/public MimeMessageHelper createMessageHelper(MimeMessage message, String subject, String text,String emailAddress, String cc, String bcc) throws Exception {MimeMessageHelper messageHelper = new MimeMessageHelper(message, true, "UTF-8");// 发件人messageHelper.setFrom(new InternetAddress(mailOptionProperties.getUsername(), mailOptionProperties.getPersonal(), "UTF-8"));// 收件人邮箱messageHelper.setTo(new InternetAddress(emailAddress));//抄送messageHelper.setCc(cc);//密送（不会在邮件收件人名单中显示出来）messageHelper.setBcc(bcc);//发送时间messageHelper.setSentDate(new Date());// 邮件的主题messageHelper.setSubject(subject);// 邮件的文本内容，true表示文本以html格式打开messageHelper.setText(text, true);return messageHelper;}public MimeMessageHelper createMessageHelper(MimeMessage message, String subject, String text, String[] emailAddress) throws Exception {MimeMessageHelper messageHelper = new MimeMessageHelper(message, true, "UTF-8");// 发件人messageHelper.setFrom(new InternetAddress(mailOptionProperties.getUsername(), mailOptionProperties.getPersonal(), "UTF-8"));// 收件人邮箱messageHelper.setTo(emailAddress);// 邮件的主题messageHelper.setSubject(subject);// 邮件的文本内容，true表示文本以html格式打开messageHelper.setText(text, true);return messageHelper;}/*** 邮件发送-单人** @param text         内容* @param subject      标题* @param emailAddress 收件人*/public void sendMail(String subject, String text, String emailAddress) throws Exception {// 创建邮件对象MimeMessage message = javaMailSender.createMimeMessage();createMessageHelper(message, subject, text, emailAddress);//  发送邮件javaMailSender.send(message);}/*** 邮件发送-多收件人** @param text         内容* @param subject      标题* @param emailAddress 收件人*/public void sendMail(String subject, String text, String[] emailAddress) throws Exception {// 创建邮件对象MimeMessage message = javaMailSender.createMimeMessage();createMessageHelper(message, subject, text, emailAddress);//  发送邮件javaMailSender.send(message);}/*** 邮件发送(带附件)** @param text         内容* @param subject      主题* @param fileName     文件名* @param inputStream  文件流* @param emailAddress 收件人*/public void sendMail(String subject, String text, String fileName,String emailAddress, InputStreamSource inputStream) throws Exception {// 创建邮件对象MimeMessage message = javaMailSender.createMimeMessage();MimeMessageHelper messageHelper = createMessageHelper(message, subject, text, emailAddress);// 添加附件messageHelper.addAttachment(fileName, inputStream);//  发送邮件javaMailSender.send(message);}/*** 邮件发送(带附件)** @param text         内容* @param subject      标题* @param file         文件* @param emailAddress 收件人*/public void sendMail(String subject, String text, String emailAddress, File file) throws Exception {// 创建邮件对象MimeMessage message = javaMailSender.createMimeMessage();MimeMessageHelper messageHelper = createMessageHelper(message, subject, text, emailAddress);// 添加附件messageHelper.addAttachment(file.getName(), file);//  发送邮件javaMailSender.send(message);}public void sendMail(String subject, String text, String emailAddress, List<File> files) throws Exception {// 创建邮件对象MimeMessage message = javaMailSender.createMimeMessage();MimeMessageHelper messageHelper = createMessageHelper(message, subject, text, emailAddress);// 添加附件for (File file : files) {messageHelper.addAttachment(file.getName(), file);}//  发送邮件javaMailSender.send(message);}/*** 发送freemarker模板格式邮件** @param text         内容* @param subject      标题* @param emailAddress 收件人* @param files        附件*/public void sendFreemarkerMail(String subject, String text, String emailAddress, List<File> files) throws Exception {MimeMessage message = javaMailSender.createMimeMessage();MimeMessageHelper messageHelper = createMessageHelper(message, subject, text, emailAddress);// 构建 Freemarker 的基本配置Configuration configuration = new Configuration(Configuration.VERSION_2_3_0);configuration.setClassLoaderForTemplateLoading(this.getClass().getClassLoader(), "templates");Template template = configuration.getTemplate("mail.ftl");// 模板渲染StringWriter out = new StringWriter();Map<String, Object> param = new HashMap<>();param.put("message", "ces");template.process(param, out);messageHelper.setText(out.toString(), true);// 添加附件for (File file : files) {messageHelper.addAttachment(file.getName(), file);}javaMailSender.send(message);}public void sendMail(MailMessage mailMessage)  {validateParam(mailMessage);try {logger.info("邮件发送开始。。。。。。。。。。。");// 创建邮件对象MimeMessage message = javaMailSender.createMimeMessage();MimeMessageHelper messageHelper = new MimeMessageHelper(message, true, "UTF-8");// 发件人messageHelper.setFrom(new InternetAddress(mailOptionProperties.getUsername(), mailOptionProperties.getPersonal(), "UTF-8"));//收件人集合List<String> recipient = mailMessage.getRecipient();if (CollectionUtils.isNotEmpty(recipient)) {// 收件人邮箱messageHelper.setTo(recipient.toArray(new String[0]));}//抄送String[] cc = mailMessage.getCc();if (cc != null && cc.length > 0) {messageHelper.setCc(cc);}//密送（不会在邮件收件人名单中显示出来）String[] bcc = mailMessage.getBcc();if (bcc != null && bcc.length > 0) {messageHelper.setBcc(bcc);}if (ObjectUtils.isNotEmpty(mailMessage.getSendDate())) {//发送时间messageHelper.setSentDate(mailMessage.getSendDate());}//附件List<File> fileList = mailMessage.getFileList();if (CollectionUtils.isNotEmpty(fileList)) {for (File file : fileList) {messageHelper.addAttachment(file.getName(), file);}}List<FileData> fileDataList = mailMessage.getFileDataList();if (CollectionUtils.isNotEmpty(fileDataList)) {for (FileData fileData : fileDataList) {messageHelper.addAttachment(fileData.getFileName(), new InputStreamResource(fileData.getInputStream()));}}// 邮件的主题messageHelper.setSubject(mailMessage.getSubject());// 邮件的文本内容，true表示文本以html格式打开messageHelper.setText(mailMessage.getText(), mailMessage.isHtml());//  发送邮件javaMailSender.send(message);logger.info("邮件发送结束。。。。。。。。。。。");} catch (Exception e) {logger.error("邮件发送失败。。。。。。。。。。。",e);}}private void validateParam(MailMessage mailMessage) {if (!StringUtils.hasText(mailMessage.getSubject())) {throw new Exception("邮件标题不能为空");} else if (!StringUtils.hasText(mailMessage.getText())) {throw new Exception("邮件内容不能为空");} else if (mailMessage.getRecipient().isEmpty()) {throw new Exception("收件人不能为空");}}}

测试

public class Test {protected Logger logger = LoggerFactory.getLogger(this.getClass());@Autowiredprivate JavaMailOperation javaMailOperate;@Autowiredprivate RemoteFilesystemConfiguration configuration;@GetMapping("/mail")public void test() throws Exception {logger.info("邮件发送开始。。。。。。。。。。。");String subject = "发送测试";String text = "邮件内容。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。";File file = new File("C:\\Users\\Desktop\\Stream流常用操作.md");InputStreamSource is = new FileSystemResource(file);javaMailOperate.sendMail(subject,text,file.getName(),"xxx@qq.com",is);logger.info("邮件发送结束。。。。。。。。。。。");}@GetMapping("/free")public void test1() throws Exception {String subject = "发送测试";String text = "邮件内容。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。";File file = new File("C:\\Users\\Desktop\\Stream流常用操作.md");javaMailOperate.sendFreemarkerMail(subject,text,"xxx@qq.com", Collections.singletonList(file));}@GetMapping("/upload")public void test2(MultipartFile multipartFile) throws Exception {String subject = "发送测试";String text = "邮件内容。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。";String originalFilename = multipartFile.getOriginalFilename();InputStream is = multipartFile.getInputStream();InputStreamSource iss = new InputStreamResource(is);javaMailOperate.sendMail(subject,text,originalFilename,"xxx@qq.com",iss);}@GetMapping("/msg")public void test3() throws Exception {File file = new File("C:\\Users\\tjx\\Desktop\\Stream流常用操作.md");MailMessage mailMessage = new MailMessage();mailMessage.setRecipient(Collections.singletonList("xxx@qq.com"));mailMessage.setCc(new String[]{"xxx@qq.com"});mailMessage.setBcc(new String[]{"li5xxxx1@126.com"});mailMessage.setSendDate(new Date());mailMessage.setSubject("发送测试");mailMessage.setText("内容");mailMessage.setHtml(true);mailMessage.setFileList(Collections.singletonList(file));javaMailOperate.sendMail(mailMessage);}//流文件测试@GetMapping("/msg1")public void test4(String url) throws Exception {MailMessage mailMessage = new MailMessage();mailMessage.setRecipient(Collections.singletonList("xxx@qq.com"));mailMessage.setCc(new String[]{"xxx@qq.com"});mailMessage.setBcc(new String[]{"xxx@126.com"});mailMessage.setSendDate(new Date());mailMessage.setSubject("发送测试");mailMessage.setText("内容");FTPClient ftpClient =new FTPClient() ;try {ftpClient.connect(configuration.getHost(),configuration.getPort());ftpClient.login(configuration.getUsername(), configuration.getPassword());ftpClient.setBufferSize(1024);// 设置文件类型（二进制）ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);ByteArrayOutputStream out = new ByteArrayOutputStream();ftpClient.retrieveFile(url, out);List<FileData> fileDataList = Lists.newArrayList();fileDataList.add(new FileData(new ByteArrayInputStream(out.toByteArray()),"测试1.txt"));javaMailOperate.sendMail(mailMessage);} catch (IOException e) {e.printStackTrace();}finally {ftpClient.logout();ftpClient.disconnect();}}}

2.方式二：java直接发送

       <dependency><groupId>javax.mail</groupId><artifactId>mail</artifactId><version>1.4.7</version></dependency>

import com.sun.mail.util.MailSSLSocketFactory;import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.*;
import javax.mail.internet.*;import java.io.File;
import java.security.GeneralSecurityException;
import java.util.Arrays;
import java.util.List;
import java.util.Properties;public class MailUtils {public static void sendMail(String email, String emailMsg, List<File> files)throws GeneralSecurityException {// 发件人电子邮箱String fromAddress = "xxx@qq.com";// 指定发送邮件的主机为 smtp.qq.com QQ 邮件服务器String host = "smtp.qq.com";// 获取系统属性Properties properties = System.getProperties();//开启认证properties.setProperty("mail.smtp.auth", "true");//启用调试properties.setProperty("mail.debug", "true");//设置链接超时properties.setProperty("mail.smtp.timeout", "1000");//设置端口properties.setProperty("mail.smtp.port", "465");//设置ssl端口properties.setProperty("mail.smtp.socketFactory.port", "465");properties.setProperty("mail.smtp.socketFactory.fallback", "false");properties.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");// 设置邮件服务器properties.setProperty("mail.smtp.host", host);properties.put("mail.smtp.auth", "true");MailSSLSocketFactory sf = new MailSSLSocketFactory();sf.setTrustAllHosts(true);properties.put("mail.smtp.ssl.enable", "true");properties.put("mail.smtp.ssl.socketFactory", sf);// 获取默认session对象Session session = Session.getDefaultInstance(properties, new Authenticator() {@Overridepublic PasswordAuthentication getPasswordAuthentication() {return new PasswordAuthentication("xxxx@qq.com", "xxx"); //发件人邮件用户名、密码}});try {// 创建默认的 MimeMessage 对象MimeMessage message = new MimeMessage(session);// Set From: 发件人message.setFrom(new InternetAddress(fromAddress,"li","UTF-8"));// Set To: 收件人message.addRecipient(Message.RecipientType.TO, new InternetAddress(email));//设置邮件主题message.setSubject("测试","UTF-8");message.setText("这是一封激活邮件，请<a href='#'>点击</a>","UTF-8");// 设置消息体String content = "<h1>邮件发送测试</h1><h3><div style=\"color: red\">" + emailMsg + "</div></h3>";Multipart multipart = new MimeMultipart();//邮件正文BodyPart contentPart = new MimeBodyPart();//邮件文字contentPart.setContent(content, "text/html;charset=utf-8");multipart.addBodyPart(contentPart);if (files!=null&&!files.isEmpty()) {//添加附件for (File attachment : files) {BodyPart attachmentPart = new MimeBodyPart();DataSource source = new FileDataSource(attachment);attachmentPart.setDataHandler(new DataHandler(source));//避免中文乱码的处理attachmentPart.setFileName(MimeUtility.encodeWord(attachment.getName()));multipart.addBodyPart(attachmentPart);}}message.setContent(multipart);message.saveChanges();// 发送消息Transport.send(message);System.out.println("Sent message successfully....");} catch (Exception mex) {mex.printStackTrace();}}public static void main(String[] args) throws AddressException, MessagingException, GeneralSecurityException {MailUtils.sendMail("xxx@qq.com", "abcdefg", Arrays.asList(new File("C:\\Users\\Desktop\\Stream流常用操作.md")));}
}

附件名称太长被截断问题，启动类添加

System.getProperties().setProperty("mail.mime.splitlongparameters", "false");