Android Jmail 发送邮件

常见问题：

A.在用jmail发送邮件的时候很多时候会在 Transport.send(message);这里报授权失败的异常：

解决方案:

（1）检查自己用户名或者密码输入错误

（2）是否有配置如下代码 

          Properties properties = new Properties();
          properties.put("mail.smtp.host", serviceAddress);
          properties.put("mail.smtp.auth", "true");

（3）对应邮件的STMP服务是否开启，申请的Email默认是关闭的

（4）QQ、163作为发送端还是授权失败，这时候就申请一个另外的Email(例如新浪的Email)

B.用Email开始的时候能发送，在自己测试一段时间后，就不能发送了。

解决方案：

（1）检查是否是代码被自己不小心动了

扫描二维码关注公众号，回复： 2409214 查看本文章

（2）用电脑或者手机端登录下发送邮件试一下，看能否发送；偶尔是因为邮件因为发送过于频繁，而被认为是中毒导致到账没禁止；

C.Jmail要实现给多用户发送邮件

解决方案：

   MimeMessage message = new MimeMessage(mailSession);

          //设置发送的人数
           InternetAddress[] internetAddresss = new InternetAddress[sendAddress.length];
           for (int i = 0; i < sendAddress.length; i++) {
                    internetAddresss[i] = new InternetAddress(sendAddress[i]);
            }
           message.setRecipients(Message.RecipientType.TO, internetAddresss);

需要的jar包：activation.jar    additionnal,jar     mail.jar

发送邮件的工具类：

import android.text.TextUtils;
import android.util.Log;
import java.util.Properties;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.Authenticator;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
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;

/**
 * Created by Relin on 2016/9/6.
 * Mail工具类
 */
public class EmailTool extends Authenticator {

    //登录的邮件的用户名[xxx.sina.com]
    private String userName;
    //登录的邮件的密码
    private String password;
    //发送邮件的服务器
    private String serviceAddress;
    //邮件主题
    private String emailTheme;
    //邮件文字内容
    private String emailTextContent;
    //添加邮件内容的类
    private MimeMultipart mimeMultipart;

    /**
     * @param serviceAddress
     * @param userName
     * @param password
     */
    public EmailTool(String serviceAddress, String userName, String password) {
        //初始化配置传递数据的类
        mimeMultipart = new MimeMultipart();
        this.userName = userName;
        this.password = password;
        this.serviceAddress = serviceAddress;
    }

    /**
     * 发送邮件之前的授权处理[extends Authenticator]
     *
     * @return 授权结果
     */
    @Override
    protected PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(userName, password);
    }

    /**
     * 发送Email
     *
     * @param sendAddress      发送的地址[多地址发送]
     * @param emailTheme       发送邮件的主题
     * @param emailTextContent 发送邮件的内容
     */
    public void sendEmail(final String[] sendAddress, final String emailTheme, final String emailTextContent) {
        if (!TextUtils.isEmpty(userName) && !TextUtils.isEmpty(password)
                && !TextUtils.isEmpty(serviceAddress) && !TextUtils.isEmpty(emailTheme)
                && !TextUtils.isEmpty(emailTextContent)) {
            new Thread() {//存在网络访问，开线程发送[注意要声明网络权限]
                @Override
                public void run() {
                    super.run();
                    try {
                        //发送邮件的属性配置
                        Properties properties = new Properties();
                        properties.put("mail.smtp.host", serviceAddress);
                        properties.put("mail.smtp.auth", "true");
                        properties.put("username", userName);
                        properties.put("password", password);
                        //建立发送邮件会话
                        Session mailSession = Session.getInstance(properties, EmailTool.this);
                        mailSession.setDebug(true);
                        MimeMessage message = new MimeMessage(mailSession);
                        message.setFrom(new InternetAddress(userName));
                        //设置发送的人数
                        InternetAddress[] internetAddresss = new InternetAddress[sendAddress.length];
                        for (int i = 0; i < sendAddress.length; i++) {
                            internetAddresss[i] = new InternetAddress(sendAddress[i]);
                        }
                        message.setRecipients(Message.RecipientType.TO, internetAddresss);
                        //=====添加发送数据=====
                        message.setSubject(emailTheme);//邮件主题
                        BodyPart textBodyPart = new MimeBodyPart();
                        textBodyPart.setText(emailTextContent);//邮件文字内容
                        //设置总共需要发送的内容
                        mimeMultipart.addBodyPart(textBodyPart);
                        message.setContent(mimeMultipart);
                        message.saveChanges();
                        //发送邮件
                        Transport.send(message);
                    } catch (MessagingException e) {
                        e.printStackTrace();
                    }
                }
            }.start();
        } else {
            Log.e("ElveTrees", this.getClass().getSimpleName() + " Parameters of the lack of send Email !");
        }
    }

    /**
     * 设置邮件的附件
     *
     * @param filePath
     * @param fileName
     */
    public void addEmailAttachment(String filePath, String fileName) {
        try {
            BodyPart bodyPart = new MimeBodyPart();
            DataSource source = new FileDataSource(filePath);
            bodyPart.setDataHandler(new DataHandler(source));
            bodyPart.setFileName(fileName);
            mimeMultipart.addBodyPart(bodyPart);
        } catch (MessagingException e) {
            e.printStackTrace();
        }
    }

}