JAVA发送Email邮件

注：这里就直接贴代码了，代码较为简单易懂，稍微测试下就好了

jar：点我下载所需jar以及源码

1.Email.java

package sd;

import java.util.Date;

/**
 * 邮件类
 * 
 */
public class Email {
	public final static String TO = "[e-mail]";//收件人的邮箱地址
	public final static String FROM = "[e-mail]";//发件人的邮箱
	public final static String CC = "[e-mail]";
	public final static String BCC = "[e-mail]";
	public final static String Email_Subject = "Test Email With JavaMail";
	public final static String Email_Header = "This Is Email Header";
	public final static String Email_Body = "This Is Email Body";
	public final static String Email_Host = "smtp.163.com";//指定邮箱server
	public Date sendDate = null;

	public Email() {
	}
}

2.MailAuthenticator.java

package sd;

import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;

/**
 * 邮件服务器认证
 * 
 */
public class MailAuthenticator extends Authenticator {
	private final static String username = "[e-mail]";//发件人邮箱账号
	private final static String password = "xxxxx";//发件人邮箱密码

	protected PasswordAuthentication getPasswordAuthentication() {
		return new PasswordAuthentication(username, password);

	}
}

3.SendEmail.java

package sd;

import java.io.UnsupportedEncodingException;
import java.util.Date;
import java.util.Properties;

import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.Address;
import javax.mail.Authenticator;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
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;

/**
 * 发送邮件
 * 
 */
public class SendEmail {

	/**
	 * 发送普通邮件
	 * 	
	 * @throws Exception
	 */
	public void doSendNormalMail() throws Exception {

		Properties prop = new Properties(); // 获取系统环境
		Authenticator auth = new MailAuthenticator(); // 邮件服务器认证
		prop.put("mail.smtp.host", Email.Email_Host);
		prop.put("mail.smtp.auth", "true");
		Session session = Session.getDefaultInstance(prop, auth);// 设置对话和邮件服务器进行通讯

		Message message = new MimeMessage(session);
		/*
		 * 设置邮件对象
		 */
		try {
			message.setSubject(Email.Email_Subject + "Normal Email"); // 设置邮件主题
			message.setContent("Hello", "text/plain"); // 设置邮件格式
			message.setText(Email.Email_Body); // 设置邮件体
			message.setHeader("Header:", Email.Email_Header); // 设置邮件标题
			message.setSentDate(new Date()); // 设置发送时间
			Address address = new InternetAddress(Email.FROM, "Dave"); // 设置发信人地址
			message.setFrom(address);

			/*
			 * 设置多个发件人地址
			 * 
			 * Address address[]={new InternetAddress("","") new
			 * InternetAddress("","")}; message.addFrom(address);
			 */

			Address toAddress = new InternetAddress(Email.TO); // 设置接收人地址
			message.setRecipient(Message.RecipientType.TO, toAddress);

			// 设置多个收件人地址
			// message.addRecipient(Message.RecipientType.TO,new
			// InternetAddress("[e-mail]"));

			message.saveChanges();
			System.out.println("sendNormalEmail() 开始发送邮件……");
			Transport.send(message); // 发送邮件
			System.out.println("发送成功！");

		} catch (MessagingException e) {
			System.out.println("发送失败！");
			e.printStackTrace();
		}

	}

	/**
	 * 发送带附件的邮件
	 * 
	 * @throws UnsupportedEncodingException
	 */
	public void sendEmailWithAttachment() throws UnsupportedEncodingException {
		Properties prop = new Properties();
		prop.put("mail.smtp.host", Email.Email_Host);
		prop.put("mail.smtp.auth", "true");
		Authenticator auth = new MailAuthenticator();
		Session session = Session.getDefaultInstance(prop, auth);
		Message message = new MimeMessage(session);

		try {
			message.setSubject(Email.Email_Subject + "Email With Accatchment");// 设置邮件主题
			message.setContent("Hello", "text/plain"); // 设置邮件格式
			message.setText(Email.Email_Body); // 设置邮件体
			message.setHeader("Header:", Email.Email_Header); // 设置邮件标题
			message.setSentDate(new Date()); // 设置发送时间
			Address address = new InternetAddress(Email.FROM, "Dave"); // 设置发信人地址
			message.setFrom(address);

			BodyPart messageBodyPart = new MimeBodyPart();
			messageBodyPart.setText("bodypart");
			Multipart multipart = new MimeMultipart();
			multipart.addBodyPart(messageBodyPart);
			messageBodyPart = new MimeBodyPart();
			DataSource source = new FileDataSource("E:\\test.xls");
			messageBodyPart.setDataHandler(new DataHandler(source));
			messageBodyPart.setFileName("E:\\test.xls");
			multipart.addBodyPart(messageBodyPart);// Put parts in
			message.setContent(multipart);
			Address toAddress = new InternetAddress(Email.TO);
			message.setRecipient(Message.RecipientType.TO, toAddress);
			message.saveChanges();
			System.out.println("sendEmailWithHtml() 开始发送邮件……");
			Transport.send(message);
			System.out.println("发送成功！");
		} catch (MessagingException e) {
			System.out.println("发送失败！");
			e.printStackTrace();
		}

	}

	/**
	 * 发送带html的邮件
	 * 
	 * @throws UnsupportedEncodingException
	 */

	public void sendEmailWithHtml() throws UnsupportedEncodingException {

		Properties prop = new Properties();
		Authenticator auth = new MailAuthenticator();
		prop.put("mail.smtp.host", Email.Email_Host);
		prop.put("mail.smtp.auth", "true");
		Session session = Session.getDefaultInstance(prop, auth);
		Message message = new MimeMessage(session);

		String htmlText = "<h1>Hello</h1>"
				+ "<a href=\"http://news.sina.com.cn\" target=\"blank\">点击连接</a>";
		System.out.println(htmlText);
		try {
			message.setSubject(Email.Email_Subject + "Email With Html");
			message.setContent(htmlText + Email.Email_Body,
					"text/html;charset=gb2312");
			// message.setText(Email.Email_Body);
			message.setSentDate(new Date());

			Address address = new InternetAddress(Email.FROM, "Dave");
			Address toAddress = new InternetAddress(Email.TO);
			message.setFrom(address);
			message.setRecipient(Message.RecipientType.TO, toAddress);
			message.saveChanges();
			System.out.println("sendEmailWithHtml() 开始发送邮件……");
			Transport.send(message);
			System.out.println("发送成功！");
		} catch (MessagingException e) {
			System.out.println("发送失败！");
			e.printStackTrace();
		}
	}

	/**
	 * 测试函数
	 * 
	 * @param args
	 */
	public static void main(String args[]) {
		try {

			// 发送普通邮件
			new SendEmail().doSendNormalMail();

			// 发送带html的邮件
			//new SendEmail().sendEmailWithHtml();

			// 发送带附件的邮件
			//new SendEmail().sendEmailWithAttachment();

		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}

4.测试过程中遇到一些问题：

a.如下错误主要是Email.java中FROM = "[e-mail]";//发件人的邮箱所填的邮箱与登录的发件人账号不一致导致

b.如下为发件人账号或密码错误导致

c.如下问题很多人都会遇到，但多发在发件人邮箱设置为QQ邮箱的时候

Authentication failed; nested exception is javax.mail.AuthenticationFailedException: 
530 Error: A secure connection is requiered(such as ssl). More information at http://service.mail.qq.com/cgi-bin/help?id=28

解决办法这里我就不做详细说明了，可以参考：http://blog.csdn.net/frankcheng5143/article/details/50436207

最后，发送成功可以在邮箱中看到