java 邮件发送

第一步：

　　先导入两个包：mail.jar和activation.jar

第二部：

　　代码实现

   

package util.email;

import java.util.*;
import java.io.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;

import util.FinalUtil;

public class SendMail {
     //收件人邮箱地址
    private String to; 
    //发件人邮箱地址
    private  static String from = ""; 
    //SMTP服务器地址
    private  static String smtpServer = ""; 
    //登录SMTP服务器的用户名
    private  static String username = "";
    //登录SMTP服务器的密码
    private static  String password ="";
    //邮件主题
    private String subject; 
    //邮件正文
    private String content; 
    //记录所有附件文件的集合
    List<String> attachments 
        = new ArrayList<String>();
    //无参数的构造器
    public SendMail(){
    }
    
    {
        Properties p = new Properties();
        InputStream is;
        try {
            String path = SendMail.class.getResource("/email.Properties").toURI().getPath(); ;
            System.out.println(path);
            is = new FileInputStream(new File(path));
            p.load(is);
            SendMail.username = p.getProperty("username").toString().trim();        //获取用户名
            SendMail.password = p.getProperty("password").toString().trim();        //获取密码
            SendMail.smtpServer = p.getProperty("smtpServer").toString().trim();    //获取SMTP
            SendMail.from = p.getProperty("from").toString().trim();                //获取form来源
        } catch (Exception e) {
            e.printStackTrace();
        }
        
    }
    //把邮件主题转换为中文
    public String transferChinese(String strText){
        try{
            strText = MimeUtility.encodeText(
                new String(strText.getBytes()
                , "GB2312"), "GB2312", "B");
        }
        catch(Exception e){
            e.printStackTrace();
        }
        return strText;
    }
    //增加附件，将附件文件名添加的List集合中
    public void attachfile(String fname){
        attachments.add(fname);
    }
    
    //发送邮件
    public boolean send(){
        System.out.println(SendMail.from+"--"+SendMail.password+"-"+SendMail.smtpServer+"--"+SendMail.username);
        //创建邮件Session所需的Properties对象
        Properties props = new Properties();
        props.put("mail.smtp.host" , smtpServer);
        props.put("mail.smtp.auth" , "true");
        //创建Session对象
        Session session = Session.getDefaultInstance(props
            //以匿名内部类的形式创建登录服务器的认证对象
            , new Authenticator()
            {
                public PasswordAuthentication getPasswordAuthentication()
                {
                    return new PasswordAuthentication(username,password); 
                }
            });
        try{
            //构造MimeMessage并设置相关属性值
            MimeMessage msg = new MimeMessage(session);
            //设置发件人
            msg.setFrom(new InternetAddress(from));
            //设置收件人
            InternetAddress[] addresses = {new InternetAddress(to)};
            msg.setRecipients(Message.RecipientType.TO , addresses);
            //设置邮件主题
            subject = transferChinese(subject);
            msg.setSubject(subject);    
            //构造Multipart
            Multipart mp = new MimeMultipart();
            //向Multipart添加正文
            MimeBodyPart mbpContent = new MimeBodyPart();
            mbpContent.setText(content);
            //将BodyPart添加到MultiPart中
            mp.addBodyPart(mbpContent);
            //向Multipart添加附件
            //遍历附件列表，将所有文件添加到邮件消息里
            for(String efile : attachments)
            {
                MimeBodyPart mbpFile = new MimeBodyPart();
                //以文件名创建FileDataSource对象
                FileDataSource fds = new FileDataSource(efile);
                //处理附件
                mbpFile.setDataHandler(new DataHandler(fds));
                mbpFile.setFileName(fds.getName());
                //将BodyPart添加到MultiPart中
                mp.addBodyPart(mbpFile);
            }
            //清空附件列表
            attachments.clear();
            //向Multipart添加MimeMessage
            msg.setContent(mp);
            //设置发送日期
            msg.setSentDate(new Date());
            //发送邮件
            Transport.send(msg);
        }
        catch (MessagingException mex){
            mex.printStackTrace();
            return false;
        }
        return true;
    }
    
    public static void main(String[] args) {

        //给总助发送邮箱
        String content = FinalUtil.tg_content("67502923@qq.com", "xxxxxx");
        SendMail sendMail = new SendMail();
        sendMail.setContent(content);
        sendMail.setSubject(FinalUtil.EMAIL_SUJECT);
        sendMail.setTo("675029234@qq.com");
        
        if(sendMail.send()){
            System.out.println("成功发送邮件");
        }
    }
    public String getTo() {
        return to;
    }
    public void setTo(String to) {
        this.to = to;
    }
    public static String getFrom() {
        return from;
    }
    public static String getSmtpServer() {
        return smtpServer;
    }
    public static String getUsername() {
        return username;
    }
    public static String getPassword() {
        return password;
    }
    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;
    }

}