java实现Google邮箱SMTP协议的示例代码
作者:Lin_XXiang
这篇文章主要为大家详细介绍了如何使用java实现Google邮箱SMTP协议,文中的示例代码简洁易懂,感兴趣的小伙伴可以跟随小编一起学习一下
一、开通Google的SMTP协议
在谷歌邮箱中开启IMAP访问
到google的设置中开启两步验证功能
在到 创建和管理应用专用密码
二、java中实现
引入maven
<!--邮件--> <dependency> <groupId>com.sun.mail</groupId> <artifactId>javax.mail</artifactId> <version>1.6.2</version> </dependency>
工具类
import javax.activation.DataHandler; import javax.mail.*; import javax.mail.internet.InternetAddress; import javax.mail.internet.MimeBodyPart; import javax.mail.internet.MimeMessage; import javax.mail.internet.MimeMultipart; import javax.mail.util.ByteArrayDataSource; import java.nio.file.Files; import java.nio.file.Paths; import java.util.Properties; /** * @author LKX * @version 1.0 * @Description * @date 2025-06-11 14:10 */ public class MailUtils { public static String USERNAME = "kexianglin261@gmail.com"; // 邮箱发送账号 public static String PASSWORD = "hrnj tyoi mnie rodo"; //邮箱平台的授权码 public static String HOST = "smtp.gmail.com"; // SMTP服务器地址 public static String PORT = "587"; //SMTP服务器端口 public static Session session = null; /** * 创建Sesssion */ public static void createSession() { if (session != null) return; Properties props = new Properties(); props.put("mail.smtp.auth", "true"); props.put("mail.smtp.starttls.enable", "true"); props.put("mail.smtp.host", HOST); //SMTP主机名 props.put("mail.smtp.port", PORT); session = Session.getInstance(props, new javax.mail.Authenticator() { protected PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication(USERNAME, PASSWORD); } }); } /** * 发送纯文本邮件,单人发送 * * @param title * @param content * @param toMail */ public static void postMessage(String title, String content, String toMail) { try { createSession(); //构造邮件主体 MimeMessage message = new MimeMessage(session); message.setSubject(title); message.setText(content); message.setFrom(new InternetAddress(USERNAME)); message.setRecipient(MimeMessage.RecipientType.TO, new InternetAddress(toMail)); //发送 Transport.send(message); } catch (MessagingException e) { throw new RuntimeException(e); } } /** * 发送带附件的邮件 * * @param title * @param content * @param fileName * @param filePath * @param toMail */ public void postMessageWithFile(String title, String content, String fileName, String filePath, String toMail) { try { createSession(); //构造邮件主体 MimeMessage message = new MimeMessage(session); message.setSubject(title); //邮件主体 BodyPart textPart = new MimeBodyPart(); textPart.setContent(content, "text/html;charset=utf-8"); //邮件附件 BodyPart filePart = new MimeBodyPart(); filePart.setFileName(fileName); filePart.setDataHandler(new DataHandler(new ByteArrayDataSource(Files.readAllBytes(Paths.get(filePath)), "application/octet-stream"))); Multipart multipart = new MimeMultipart(); multipart.addBodyPart(textPart); multipart.addBodyPart(filePart); message.setContent(multipart); message.setFrom(new InternetAddress(USERNAME)); message.setRecipient(MimeMessage.RecipientType.TO, new InternetAddress(toMail)); //发送 Transport.send(message); } catch (Exception e) { throw new RuntimeException(e); } } }
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