Java 实现简单的邮件发送

        新项目中需要实现将数据采集结果自动发送到指定邮箱的功能，由于Java不是很懂，网上一番搜索和借鉴之后，弄了一个简单的邮件发送功能，当做是java入门学习吧，初步验证，邮件能正常发送。

代码添加后，由于所选的JDK版本（jdk-7u5-windows-i586）安装后，附带JRE库中没有包含mail.jar，程序运行出错。 mail.jar额外下载之后，在eclipse 中： project -->properties-->java Build Path 下点击 Add External JARs...指定存放路径添加即可。

import java.util.Date;
import java.util.Properties;
import javax.mail.Address;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;


public class mail_test
{
    //mail server
    private String host = "smtp.126.com";
    //mail account 
    private String username = "xxxxxxx";
    //password
    private String password = "xxxxxxx";
    
    private String mail_head_name = "Head of test mail";

    private String mail_head_value = "Head of test mail";

    private String mail_to = "[email protected]";

    private String mail_from = "[email protected]";

    private String mail_subject = "subject of test mail";

    private String mail_body = "content of of test mail";

    private String personalName = "test_mail!";

    public mail_test()
    {
    }

   
    public void send() throws Exception
    {
        try
        {
            Properties props = new Properties(); // 获取系统环境
            Authenticator auth = new Email_Autherticator(); // 认证
            props.put("mail.smtp.host", host);
            props.put("mail.smtp.auth", "true");
            Session session = Session.getDefaultInstance(props, auth);
            //设置session,和邮件服务器进行通讯。
            MimeMessage message = new MimeMessage(session);
          
            message.setSubject(mail_subject); 
            message.setText(mail_body); // 设置邮件正文
            message.setHeader(mail_head_name, mail_head_value); // 设置邮件标题
            message.setSentDate(new Date()); // 设置邮件发送日期
            Address address = new InternetAddress(mail_from, personalName);
            message.setFrom(address); // 设置邮件发送者的地址
            Address toAddress = new InternetAddress(mail_to); // 设置邮件接收方的地址
            message.addRecipient(Message.RecipientType.TO, toAddress);
            Transport.send(message); // 发送邮件
            System.out.println("send over!");
        } catch (Exception ex)
        {
            ex.printStackTrace();
            throw new Exception(ex.getMessage());
        }
    }

    /*
     * 用来进行服务器对用户的认证
     */
    public class Email_Autherticator extends Authenticator
    {
        public Email_Autherticator()
        {
            super();
        }

        public Email_Autherticator(String user, String pwd)
        {
            super();
            username = user;
            password = pwd;
        }

        public PasswordAuthentication getPasswordAuthentication()
        {
            return new PasswordAuthentication(username, password);
        }
    }

    public static void main(String[] args)
    {
    	mail_test sendmail = new mail_test();
        try
        {
            sendmail.send();
        } catch (Exception ex)
        {
        }
    }

}

程序编译运行之后，eclipse里console中显示：send over！表明测试邮件已成功发送。