javamail的smtp方式发送邮件实例

本实例为javamail发送smtp邮件实例和常见问题解决

package mail;

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;

/** *//**
 * 发送普通邮件，接受普通邮件 发送带有附件的邮件，接收带有附件的邮件 发送html形式的邮件，接受html形式的邮件 发送带有图片的邮件等做了一个总结。
 */
public class Test
{
    // 邮箱服务器
    private String host = "smtp.163.com";
    // 这个是你的邮箱用户名   用户名一般为[e-mail]中的xxx 但当确认无误时依然是认证错误可以修改为[e-mail]全名测试
    private String username = "******";
    // 你的邮箱密码
    private String password = "******";

    private String mail_head_name = "this is head of this mail";

    private String mail_head_value = "this is head of this mail";

    private String mail_to = "[e-mail]";

    private String mail_from = "*****@163.com";

    private String mail_subject = "this is the subject of this test mail";

    private String mail_body = "this is the mail_body of this test mail";

    private String personalName = "我的邮件";

    public Test()
    {
    }

    /** *//**
     * 此段代码用来发送普通电子邮件
     */
    public void send() throws Exception
    {
        try
        {
            Properties props = new Properties(); // 获取系统环境
            Authenticator auth = new Email_Autherticator(); // 进行邮件服务器用户认证
            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.setContent("foobar, "application/x-foobar"); // 设置邮件格式
            message.setSubject(mail_subject); // 设置邮件主题
            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 ok!");
        } 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)
    {
        Test sendmail = new Test();
        try
        {
            sendmail.send();
        } catch (Exception ex)
        {
        }
    }

}

常见错误

错误一：
Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/mail/util/LineInputStream
解决方法：到D:\MyEclipse 6.5

\myeclipse\eclipse\plugins\com.genuitec.eclipse.j2eedt.core_6.5.0.zmyeclipse650200806

\data\libraryset\EE_5目录下找到javaee.jar删除其中到mail文件夹。

错误二：
Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/mail/util/BEncoderStream
解决方法：
下载mail.jar和activation.jar文件加入到工程中。

下载地址：http://lym6520.iteye.com/blog/655373