使用Java程序发送Email

    目前很多大型的网站忘记登录密码常见的一种形式是使用邮箱找回密码  最近做项目也有这个需求  现在总结一下  以便以后查看

使用到的包有 mailapi.jar smtp.jar  

封装发送邮件的实体

package com.tes;

import java.util.Date;
import java.util.Properties;

import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.Multipart;
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;
import javax.mail.internet.MimeUtility;

/**
 * @author Javen
 * @Email [e-mail]
 */
public class Mail {
    String to = ""; // 收件人
    String from = ""; // 发件人
    String host = ""; // smtp主机
    String username = ""; // 用户名
    String password = ""; // 密码
    String subject = ""; // 邮件主题
    String content = ""; // 邮件正文

    public Mail() {
    }

    public Mail(String to, String from, String host, String username,
            String password, String subject, String content) {
        this.to = to;
        this.from = from;
        this.host = host;
        this.username = username;
        this.password = password;
        this.subject = subject;
        this.content = content;
    }

    /**
     * 把主题转换为中文
     *
     * @param strText
     * @return
     */
    public String transferChinese(String strText) {

        try {
            strText = MimeUtility.encodeText(new String(strText.getBytes(),
                    "GB2312"), "GB2312", "B");
        } catch (Exception e) {
            e.printStackTrace();
        }

        return strText;
    }

    /**
     * 发送邮件
     *
     * @return 成功返回true，失败返回false
     */
    public boolean sendMail() {
        // 构造mail session
        Properties props = System.getProperties();
        props.put("mail.smtp.host", host);
        props.put("mail.smtp.auth", "true");
        Session session = Session.getDefaultInstance(props,
                new Authenticator() {
                    public PasswordAuthentication getPasswordAuthentication() {
                        return new PasswordAuthentication(username, password);
                    }
                });
        try {
            // 构造MimeMessage并设定基本的值，创建消息对象
            MimeMessage msg = new MimeMessage(session);
            // 设置消息内容
            msg.setFrom(new InternetAddress(from));
            System.out.println(from);
            // 把邮件地址映射到Internet地址上
            InternetAddress[] address = { new InternetAddress(to) };
            /**
             * setRecipient（Message.RecipientType type, Address
             * address），用于设置邮件的接收者。<br>
             * 有两个参数，第一个参数是接收者的类型，第二个参数是接收者。<br>
             * 接收者类型可以是Message.RecipientType .TO，Message
             * .RecipientType.CC和Message.RecipientType.BCC，TO表示主要接收人，CC表示抄送人
             * ，BCC表示秘密抄送人。接收者与发送者一样，通常使用InternetAddress的对象。
             */
            msg.setRecipients(Message.RecipientType.TO, address);
            // 设置邮件的标题
            subject = transferChinese(subject);
            msg.setSubject(subject);
            // 构造Multipart
            Multipart mp = new MimeMultipart();

            // 向Multipart添加正文
            MimeBodyPart mbpContent = new MimeBodyPart();
            // 设置邮件内容(纯文本格式)
            // mbpContent.setText(content);
            // 设置邮件内容(HTML格式)
            mbpContent.setContent(content, "text/html;charset=utf-8");
            // 向MimeMessage添加（Multipart代表正文）
            mp.addBodyPart(mbpContent);
            // 向Multipart添加MimeMessage
            msg.setContent(mp);
            // 设置邮件发送的时间。
            msg.setSentDate(new Date());
            // 发送邮件
            Transport.send(msg);
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
        return true;
    }

    public String getTo() {
        return to;
    }

    public void setTo(String to) {
        this.to = to;
    }

    public String getFrom() {
        return from;
    }

    public void setFrom(String from) {
        this.from = from;
    }

    public String getHost() {
        return host;
    }

    public void setHost(String host) {
        this.host = host;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = 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;
    }
}

　　　　测试向自己的邮箱发一封邮件

package com.tes;

/**
 * @author Javen
 * @Email [e-mail]
 *
 */
public class Test {
    public static void main(String[] args) {

        Mail mail = new Mail();
        mail.setTo("[e-mail]");
        mail.setFrom("[e-mail]");// 你的邮箱
        mail.setHost("smtp.163.com"); //smtp.qq.com
        mail.setUsername("xxx");// 用户
        mail.setPassword("xxxx");// 密码
        mail.setSubject("[测试]找回您的账户密码");
        mail.setContent("测试发邮件");
        if (mail.sendMail()) {
            System.out.println(" 发送成功");
        }

    }
}