JavaMail发送邮件第一版

首先，我们先来了解一个基本的知识点，用什么工具来发邮件？

简单的说一下，目前用的比较多的客户端：OutLook，Foxmail等

顺便了解一下POP3、SMTP协议的区别：

• POP3，全名为“Post Office Protocol - Version 3”，即“邮局协议版本3”。是TCP/IP协议族中的一员，由RFC1939 定义。本协议主要用于支持使用客户端远程管理在服务器上的电子邮件，提供了SSL加密。

• 　　SMTP（Simple Mail Transfer Protocol）即简单邮件传输协议,它是一组用于由源地址到目的地址传送邮件的规则，由它来控制信件的中转方式。SMTP协议属于TCP/IP协议簇，它帮助每台计算机在发送或中转信件时找到下一个目的地。

• 　　POP服务器是用来收信的，而且每个Email地址一般只有一个。如果你要同时收取多个邮箱的信件，就必须挨个设置每个邮箱的POP3服务器地址。

• 　　SMTP则是负责邮件服务器与邮件服务器之间的寄信的通讯协定。

pop3的端口：110                       smtp的端口：25

下面就是真实的例子了。

JAVA邮件发送的步骤：

1、构建一个继承自javax.mail.Authenticator的具体类，并重写里面的getPasswordAuthentication()方法。此类是用作登录校验的，以确保你对该邮箱有发送邮件的权利。

2、构建一个properties文件，该文件中存放SMTP服务器地址等参数。

3、通过构建的properties文件和javax.mail.Authenticator具体类来创建一个javax.mail.Session。Session的创建，就相当于登录邮箱一样。剩下的自然就是新建邮件。

4、构建邮件内容，一般是javax.mail.internet.MimeMessage对象，并指定发送人，收信人，主题，内容等等。

5、使用javax.mail.Transport工具类发送邮件。

示例1：使用JavaMail发送邮件——文本文件

EmailAuthenticator类

public class EmailAuthenticator extends Authenticator {
    private String username;   //用户名

    private String userpass;//密码

    /**
     * @return the username
     */
    public String getUsername() {
        return username;
    }

    /**
     * @return the userpass
     */
    public String getUserpass() {
        return userpass;
    }

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

    public void setUserpass(String userpass) {
        this.userpass = userpass;
    }
/**
 *
 */
    public EmailAuthenticator() {
    }
  /**
   *
   * @param username
   * @param userpass
   */
    public EmailAuthenticator(String username, String userpass) {
        this.username = username;
        this.userpass = userpass;
    }
    /**
     *
     */
    public PasswordAuthentication getPasswordAuthentication(){
        return new PasswordAuthentication(username,userpass);
    }

}

Mail类

public class Mail {
     private String mailServer,from,to,mailSubject,mailContent;
      private String username,password;
    public Mail() {
        //认证登录用户
        username="wgy@mail.com";
        //username="m15010033XXX_1@163.com";
          //认证密码
        password="wgy";
        //password="greatXXX";
          //认证的邮箱对应的邮件服务器
         // mailServer="192.168.15.XXX";
         mailServer="mail.com";
          //发件人信息
          from="wgy@mail.com";
          //from="m15010033XXX_1@163.com";
          //收件人信息
          to="dog@mail.com";
          //to="tom";
          //to="yyXXX@126.com";
          //邮件标题
          mailSubject="心跳";
          //邮件内容
          mailContent="XXX——————————————————————————————未知的时间和地点";
    }
     //设置邮件服务器
    @SuppressWarnings("static-access")
    public void sendInfo() {
        Properties props=System.getProperties();
          //指定邮件server
        props.put("mail.smtp.host", mailServer);
          //是否开启认证
        props.put("mail.smtp.auth", "true");
          //smtp协议的
        props.put(");
         //产生Session服务
        EmailAuthenticator authenticator=new EmailAuthenticator(username, password);
         // 根据邮件会话属性和密码验证器构造一个发送邮件的session
        Session session = Session.getInstance(props, authenticator);
        // 根据session创建一个邮件消息
        Message message=new MimeMessage(session);
    try {
         // 创建邮件发送者地址
        message.setFrom(new InternetAddress(from));
          // Message.RecipientType.TO属性表示接收者的类型为TO
        message.setRecipient(Message.RecipientType.TO, new InternetAddress(to));
        // 设置邮件消息的主题
        message.setSubject(mailSubject);
           //设置内容(设置字符集处理乱码问题) ,设置HTML内容
           message.setContent(mailContent,"text/html;charset=gbk");
           // 设置邮件消息发送的时间
           message.setSentDate(new Date());
           //创建Transport实例
           Transport tran=session.getTransport("smtp");
           //发送邮件
           tran.send(message,message.getAllRecipients());
           tran.close();
    } catch (Exception e) {
        e.getMessage();
    }

    }

Test类　　

public static void main(String[] args) {
    Mail mail=new Mail();//实例化
    mail.sendInfo();
    System.out.println("OK");
}
}

这样就可以实现了服务器之间的传输。

示例：使用Spring发送简单、带附件、HTML邮件

MailWithHTML类

public class MailWithHTML {
    private JavaMailSender mailSender; //必须使用 JavaMailSender
    public void setMailSender(JavaMailSender mailSender) {
        this.mailSender = mailSender;
    }
    public void send() throws MessagingException,IOException{
        MimeMessage mimeMessage = mailSender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true, "UTF-8");
        helper.setFrom("wgy@mail.com");
        helper.setTo("tom");
        helper.setSubject("欢迎来到员工社区");
        StringBuffer sb = new StringBuffer();
        sb.append("<html><head>");
        sb.append("<meta http-equiv=\"content-type\" content=\"text/html;charset=utf-8\">");
        sb.append("<head><body>");
        sb.append("<font color='blue' size='5' face='Arial'>");
        sb.append("尊敬的jerry您好：</font><br/><br/>");
        sb.append("&nbsp;&nbsp;&nbsp;&nbsp;");
        sb.append("<font color='black' size='4' face='Arial'>");
        sb.append("恭喜您在员工社区注册账号成功！请妥善保管您的账号，" +
                "如果登录时忘记密码，可以在网站登录页找回。<br/>");
        sb.append("<br/><br/>系统管理员</font>");
        //增加内嵌图片设置
//        sb.append("<br/><img src=\"cid:photo\"></img>");
        sb.append("</body></html>");
        helper.setText(sb.toString(),true);
        //增加内嵌文件
        ClassPathResource file = new ClassPathResource("/cn/bdqn/attachfiles/Quartz.rar");
        helper.addInline("photo", file);
        mailSender.send(mimeMessage);
    }

MailWithAttachment类

public class MailWithAttachment {
    private JavaMailSender mailSender; //必须使用 JavaMailSender
    public void setMailSender(JavaMailSender mailSender) {
        this.mailSender = mailSender;
    }

    public void send() throws MessagingException,IOException{
        MimeMessage mimeMessage = mailSender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true, "UTF-8");
        helper.setFrom("wgy@mail.com");
        //helper.setFrom("m15010033582_1@163.com");
        helper.setTo("tom");

        helper.setSubject("问好");
        helper.setText("好久不见，最近好吗？");
        //添加附件1
        ClassPathResource file1 = new ClassPathResource(
                                        "/cn/bdqn/attachfiles/test.doc");
        helper.addAttachment(file1.getFilename(), file1.getFile());
        //添加附件2：附件的文件名为中文时，需要对文件名进行编码转换，解决乱码问题
        ClassPathResource file2 = new ClassPathResource(
                                        "/cn/bdqn/attachfiles/JAVA-SSH（三大框架）面试题.doc");
        helper.addAttachment(MimeUtility.encodeWord(file2.getFilename()),file2.getFile());
        mailSender.send(mimeMessage);
    }

Mail类

public class Mail {
    private MailSender mailSender;
    public void setMailSender(MailSender mailSender) {
        this.mailSender = mailSender;
    }
    public void send(){
        SimpleMailMessage message = new SimpleMailMessage();
        message.setFrom("wgy@mail.com");
        message.setTo("tom");
        message.setSubject("问好");
        message.setText("好久不见!!!!!!!!!");
        mailSender.send(message);
    }
}

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans
    xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:p="http://www.springframework.org/schema/p"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd">
    <bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
        <property name="host" value="192.168.15.2xx"></property><!-- 服务器 -->
        <!-- <property name="host" value="smtp.163.com"></property> --><!-- 服务器 -->
        <property name="></property><!-- 端口 -->
        <property name="username" value="wgy"></property><!-- 用户名 -->
    <!--     <property name="username" value="m15010033xxx_1@163.com"></property> -->
        <property name="password" value="wgy"></property><!-- 密码 -->
        <!--     <property name="password" value="greatxxx"></property> -->
        <property name="protocol" value="smtp" ></property><!-- 协议 -->
        <property name="defaultEncoding" value="utf-8"></property><!-- 默认编码 -->
        <property name="javaMailProperties">
            <props>
                <!-- 设置SMTP服务器需要用户验证  -->
                <prop key="mail.smtp.auth">true</prop>
            </props>
        </property>
    </bean>
    <bean id="mail" class="cn.bdqn.Mail">
        <property name="mailSender" ref="mailSender"></property>
    </bean>

    <bean id="mailWithAttachment" class="cn.bdqn.MailWithAttachment">
        <property name="mailSender" ref="mailSender"></property>
    </bean>

    <bean id="mailWithHtml" class="cn.bdqn.MailWithHTML">
        <property name="mailSender" ref="mailSender"></property>
    </bean>

</beans>

MailTest类

public class MailTest {
    public static void main(String[] args){
        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
        /*测试简单邮件*/
        Mail mail = (Mail)context.getBean("mail");
        mail.send();

        /*测试带附件的邮件*/
        try{
            MailWithAttachment mailWithAttach = (MailWithAttachment)context.getBean("mailWithAttachment");
            mailWithAttach.send();
        }catch(Exception e){
            System.out.print(e.toString());
        }

        /*测试HTML格式的邮件*/
        try{
            MailWithHTML mailWithHtml = (MailWithHTML)context.getBean("mailWithHtml");
            mailWithHtml.send();
            System.out.println("我ok了");
        }catch(Exception e){
            System.out.print(e.toString());
        }
    }

注意

jar包

资源

示例：使用模板创建邮件正文

MailService类

public class MailService {
    private JavaMailSender mailSender;
    private Configuration freeMarkerConfiguration;
    public void setMailSender(JavaMailSender mailSender) {
        this.mailSender = mailSender;
    }
    public void setFreeMarkerConfiguration(Configuration freeMarkerConfiguration) {
        this.freeMarkerConfiguration = freeMarkerConfiguration;
    }
    private String getMailText(){
        String htmlText = "";
        try{
            //获取模板实例
            Template template = freeMarkerConfiguration.getTemplate("mail.ftl");
            //通过Map传递动态数据
            Map map = new HashMap();
            map.put("user", "jerry");
            //解析模板文件
            htmlText = FreeMarkerTemplateUtils
                                .processTemplateIntoString(template, map);
        }catch(IOException e){
            e.printStackTrace();
        }catch(TemplateException e){
            e.printStackTrace();
        }catch(Exception e){
            e.printStackTrace();
        }
        return htmlText;
    }

    public void sendMail() throws MessagingException,IOException{
        MimeMessage mimeMessage = mailSender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(
                                        mimeMessage, true, "UTF-8");
        helper.setFrom("tina@mail.com");
        helper.setTo("jerry@mail.com");
        helper.setSubject("欢迎来到员工社区");
        helper.setText(getMailText(),true);
        mailSender.send(mimeMessage);
    }

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans
    xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:p="http://www.springframework.org/schema/p"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd">
    <bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
        <property name="host" value="mail.com"></property>
        <property name="></property>
        <property name="username" value="tina"></property>
        <property name="></property>
        <property name="protocol" value="smtp" ></property>
        <property name="defaultEncoding" value="utf-8"></property>
        <property name="javaMailProperties">
            <props>
                <!-- 设置SMTP服务器需要用户验证  -->
                <prop key="mail.smtp.auth">true</prop>
            </props>
        </property>
    </bean>

    <bean id="freeMarkerConfiguration" class="org.springframework.ui.freemarker.FreeMarkerConfigurationFactoryBean">
        <!-- 指定模板文件路径 -->
        <property name="templateLoaderPath" value="cn/bdqn/mailtemplate/"></property>
        <!-- 设置FreeMarker环境变量  -->
        <property name="freemarkerSettings">
            <props>
                <prop key=</prop>
            </props>
        </property>
    </bean>

    <bean id="mailService" class="cn.bdqn.MailService">
        <property name="mailSender" ref="mailSender"></property>
        <property name="freeMarkerConfiguration" ref="freeMarkerConfiguration"></property>
    </bean>

</beans>

MailTest类

public class MailTest {
    public static void main(String[] args){
        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");

        try{
            MailService mailService = (MailService)context.getBean("mailService");
            mailService.sendMail();
        }catch(Exception e){
            System.out.print(e.toString());
        }
    }

注意：

jar包

资源

到这里就完成了。。。。。。。。。