Java发送邮件的几种方式

最近的一个项目中用到了邮件发送，所以研究了一下。将其总结下来。
要发送邮件就要用到java中的JavaMail,关于JavaMailAPI的详解呢在
(http://blog.csdn.net/imain/article/details/1453677“)中有非常详尽的介绍，我就直接上代码了。
1：使用JavaMail发送邮件

 // 1.创建一个程序与邮件服务器会话对象 Session Properties props = new Properties(); props.setProperty("mail.transport.protocol", "SMTP"); props.setProperty("mail.smtp.host", "smtp.163.com"); props.setProperty("mail.smtp.port", "25"); // 指定验证为true props.setProperty("mail.smtp.auth", "true"); props.setProperty("mail.smtp.timeout","1000"); // 验证账号及密码，密码需要是第三方授权码 Authenticator auth = new Authenticator() { public PasswordAuthentication getPasswordAuthentication({    return new PasswordAuthentication("[e-mail]", "czxsqm521");            }        }; Session session = Session.getInstance(props, auth);// 2.创建一个Message，它相当于是邮件内容Message message = new MimeMessage(session);// 设置发送者message.setFrom(new InternetAddress("[e-mail]"));// 设置发送方式与接收者message.setRecipient(MimeMessage.RecipientType.TO, new InternetAddress(email));// 设置主题message.setSubject("邮件发送测试");// 设置内容message.setContent(emailMsg, "text/html;charset=utf-8");// 3.创建 Transport用于将邮件发送Transport.send(message);

2：我用的是spring框架,spring 封装了一个简单易用的关于邮件发送的工具类JavaMailSenderImpl ,所以可以用JavaMailSenderImpl 来实现邮件发送。

public class MailService {    private static final String HOST = "smtp.163.com";    private static final Integer PORT = 25;    private static final String USERNAME = "[e-mail]";    private static final String PASSWORD = "czxsqm521";    private static final String EMAILFORM = "[e-mail]";    private static JavaMailSenderImpl mailSender = createMailSender();    /**     * 邮件发送器     *     * @return 配置好的工具     */    private static JavaMailSenderImpl createMailSender() {        JavaMailSenderImpl sender = new JavaMailSenderImpl();        sender.setHost(HOST);        sender.setPort(PORT);        sender.setUsername(USERNAME);        sender.setPassword(PASSWORD);        sender.setDefaultEncoding("Utf-8");        Properties p = new Properties();        p.setProperty("mail.smtp.timeout", "25000");        p.setProperty("mail.smtp.auth", "false");        sender.setJavaMailProperties(p);        return sender;    }    /**     * 发送邮件     *     * @param to 接受人     * @param subject 主题     * @param html 发送内容     * @throws MessagingException 异常     * @throws UnsupportedEncodingException 异常     */    public static void sendHtmlMail(String to, String subject, String html) throws MessagingException,UnsupportedEncodingException {        MimeMessage mimeMessage = mailSender.createMimeMessage();        // 设置utf-8或GBK编码，否则邮件会有乱码        MimeMessageHelper messageHelper = new MimeMessageHelper(mimeMessage, true, "UTF-8");        messageHelper.setFrom(EMAILFORM, "系统名称");        messageHelper.setTo(to);        messageHelper.setSubject(subject);        messageHelper.setText(html, true);        mailSender.send(mimeMessage);    }}

当然这种是硬编码的方式了。也可以写在资源文件中。

资源文件

mailConfig.properties#服务器mailHost=smtp.163.com#端口号mailPort=25#邮箱账号mailUsername=[e-mail]#邮箱授权码mailPassword=czxsqm521#时间延迟mailTimeout=25000#发送人mailFrom=[e-mail]

获得资源文件内容

public class MailConfig {    private static final String PROPERTIES_DEFAULT = "mailConfig.properties";    public static String host;    public static Integer port;    public static String userName;    public static String passWord;    public static String emailForm;    public static String timeout;    public static String personal;    public static Properties properties;    static{        init();    }    /**     * 初始化     */    private static void init() {        properties = new Properties();        try{            InputStream inputStream = MailConfig.class.getClassLoader().getResourceAsStream(PROPERTIES_DEFAULT);            properties.load(inputStream);            inputStream.close();            host = properties.getProperty("mailHost");            port = Integer.parseInt(properties.getProperty("mailPort"));            userName = properties.getProperty("mailUsername");            passWord = properties.getProperty("mailPassword");            emailForm = properties.getProperty("mailFrom");            timeout = properties.getProperty("mailTimeout");            personal = "墨裔";        } catch(IOException e){            e.printStackTrace();        }    }}

发送邮件

public class MailUtil {    private static final String HOST = MailConfig.host;    private static final Integer PORT = MailConfig.port;    private static final String USERNAME = MailConfig.userName;    private static final String PASSWORD = MailConfig.passWord;    private static final String emailForm = MailConfig.emailForm;    private static final String timeout = MailConfig.timeout;    private static final String personal = MailConfig.personal;    private static JavaMailSenderImpl mailSender = createMailSender();    /**     * 邮件发送器     *     * @return 配置好的工具     */    private static JavaMailSenderImpl createMailSender() {        JavaMailSenderImpl sender = new JavaMailSenderImpl();        sender.setHost(HOST);        sender.setPort(PORT);        sender.setUsername(USERNAME);        sender.setPassword(PASSWORD);        sender.setDefaultEncoding("Utf-8");        Properties p = new Properties();        p.setProperty("mail.smtp.timeout", timeout);        p.setProperty("mail.smtp.auth", "false");        sender.setJavaMailProperties(p);        return sender;    }    /**     * 发送邮件     *     * @param to 接受人     * @param subject 主题     * @param html 发送内容     * @throws MessagingException 异常     * @throws UnsupportedEncodingException 异常     */    public static void sendMail(String to, String subject, String html) throws MessagingException,UnsupportedEncodingException {        MimeMessage mimeMessage = mailSender.createMimeMessage();        // 设置utf-8或GBK编码，否则邮件会有乱码        MimeMessageHelper messageHelper = new MimeMessageHelper(mimeMessage, true, "UTF-8");        messageHelper.setFrom(emailForm, personal);        messageHelper.setTo(to);        messageHelper.setSubject(subject);        messageHelper.setText(html, true);        mailSender.send(mimeMessage);    }}

源代码已经上传，可以下载
https://github.com/wolf521/demo/tree/master/src/main/java/com/example/demo/mail

jar包下载
http://download.csdn.net/download/qq_32371887/10123280