邮件是在日常生活中，这篇文章主要介绍了java实现基于SMTP发送邮件的方法,实例分析了java基于SMTP服务发送邮件的相关技巧，具有一定参考借鉴价值,需要的朋友可以参考下.
1.写一个 MailSendProper 类封装需要的属性
import java.util.Properties;public class MailSendProper { private String Host ; //发送邮件服务器的ip private String Port ; //发送邮件服务器的端口号 private String SendAddress ; //邮件发送者的地址 private String ReceiveAddress ; //邮件接受者的地址 private String username ; //登录发送邮箱的用户名 private String password ; //登录发送邮箱的密码 private boolean isvalidate = true ; //是否需要身份验证 private String subject ; //邮件标题 private String content ; //邮件内容 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 String getHost() { return Host; } public void setHost(String host) { Host = host; } public String getPort() { return Port; } public void setPort(String port) { Port = port; } public String getSendAddress() { return SendAddress; } public void setSendAddress(String sendAddress) { SendAddress = sendAddress; } public String getReceiveAddress() { return ReceiveAddress; } public void setReceiveAddress(String receiveAddress) { ReceiveAddress = receiveAddress; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public boolean isIsvalidate() { return isvalidate; } public void setIsvalidate(boolean isvalidate) { this.isvalidate = isvalidate; } public Properties getProperties(){ Properties properties = new Properties() ; properties.put("mail.smtp.host", this.Host) ; properties.put("mail.smtp.port", this.Port) ; properties.put("mail.smtp.auth", isvalidate?"true":"false") ; return properties ; }}2、写一个 EmailMessage 封装 发送信息
public class EmailMessage { private String title ; private String context ; private String toEmail ; public EmailMessage() { super(); } public EmailMessage(String title, String context, String toEmail) { super(); this.title = title; this.context = context; this.toEmail = toEmail; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getContext() { return context; } public void setContext(String context) { this.context = context; } public String getToEmail() { return toEmail; } public void setToEmail(String toEmail) { this.toEmail = toEmail; }}3、写一个 MailAttorney 邮箱密码验证器 类
import javax.mail.Authenticator;import javax.mail.PasswordAuthentication;public class MailAttorney extends Authenticator { private String username ; private String password ; public MailAttorney(String username,String password) { this.username = username ; this.password = password ; } //覆盖父类方法，获取密码认证器 @Override protected PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication(username,password) ; }}4 、 写一个 MailSend 邮件工具类
import java.util.Date;import javax.mail.Address;import javax.mail.Message;import javax.mail.Session;import javax.mail.Transport;import javax.mail.internet.InternetAddress;import javax.mail.internet.MimeMessage;import com.VTBBS.entity.EmailMessage;public class MailSend { public static boolean mailTest(MailSendProper mailsender){ MailAttorney attorney = null ; if(mailsender.isIsvalidate()){//判断是否需要身份认证 attorney = new MailAttorney(mailsender.getUsername(),mailsender.getPassword()) ; } //根据邮箱会话属性和密码验证器构造一个发送邮箱的seesion Session session = Session.getInstance(mailsender.getProperties(),attorney) ; //根据session创建一个邮件消息 Message mailMessage = new MimeMessage(session) ; try { //创建邮件发送者的地址 Address from = new InternetAddress(mailsender.getSendAddress()) ; //设置邮箱消息的发送者 mailMessage.setFrom(from); //创建邮件接收这的地址，并设置到邮件消息中 Address to = new InternetAddress(mailsender.getReceiveAddress()) ; mailMessage.setRecipient(Message.RecipientType.TO, to); mailMessage.setSubject(mailsender.getSubject()); //设置邮件标题 mailMessage.setSentDate(new Date()); //设置发送邮件时间 mailMessage.setText(mailsender.getContent()); //设置邮件内容 Transport.send(mailMessage); return true ; } catch (Exception e) { e.printStackTrace(); return false ; } } public static boolean sendEmail(EmailMessage message){ MailSendProper mail = new MailSendProper() ; mail.setHost("smtp.126.com"); //smtp简单的邮件传输协议，默认端口号是25， mail.setPort("25"); mail.setIsvalidate(true); //需呀身份验证 mail.setUsername(""); //设置登录用户名 mail.setPassword(""); //设置发送者的密码 mail.setSendAddress(""); //设置发送这的地址 发送者地址和登录用户名是同一个 mail.setReceiveAddress(message.getToEmail()); //设置接收者的地址 mail.setSubject(message.getTitle()); //设置邮箱标题 mail.setContent(message.getContext()); //设置邮箱的内容 return mailTest(mail) ; }}注意：使用的邮箱必须开启POP3/SMTP服务 才能发送成功，不同的邮箱，邮箱的传输协议不一样如:
QQ邮箱：SMTP传输协议是 smtp.qq.com 端口 25
POP3传输协议是 pop3.qq.com 端口 110
5、使用方法测试
public static void main(String[] args) { EmailMessage message = new EmailMessage() ; String code = String.valueOf(Math.random()).substring(3, 9) ; //生成验证码 message.setTitle("邮箱验证"); //邮件标题 message.setContext("尊敬的用户你好，你的验证码为"+code+"。"); //邮件内容 message.setToEmail("[email protected]"); //要发送给谁 System.out.println(MailSend.sendEmail(message)?"发送成功":"发送失败") ;}希望本文所述对大家学习java程序设计有所帮助。