如何使用 HTML 代码正确发送邮件 javax.mail 1.4答案

【问题标题】：How to properly send mail javax.mail 1.4 with HTML code如何使用 HTML 代码正确发送邮件 javax.mail 1.4
【发布时间】：2014-12-10 23:09:16
【问题描述】：

我正在尝试使用 lib javax.mail 1.4 在 JAVA 中发送电子邮件，但我遇到了很多问题：

1.- RCPT TO 看起来像未公开的收件人。

2.- 忽略 HTML 代码。

3.- 邮件正文开头和结尾的一些奇怪代码（现在我放完整代码）

4.- 主题更改为垃圾邮件。

5.- 不支持锐角。

代码和日志来了。

    public static void enviarCorreo(String asunto, List<String> destinatarios, String cuerpo) {

    try {

        if(destinatarios!=null && !"".equals(destinatarios)) {

            System.out.println("Creando handlers para los tipos..");

            MailcapCommandMap mc = (MailcapCommandMap) CommandMap.getDefaultCommandMap(); 
            mc.addMailcap("text/html;; x-java-content-handler=com.sun.mail.handlers.text_html"); 
            mc.addMailcap("text/xml;; x-java-content-handler=com.sun.mail.handlers.text_xml"); 
            mc.addMailcap("text/plain;; x-java-content-handler=com.sun.mail.handlers.text_plain"); 
            mc.addMailcap("multipart/*;; x-java-content-handler=com.sun.mail.handlers.multipart_mixed"); 
            mc.addMailcap("message/rfc822;; x-java-content- handler=com.sun.mail.handlers.message_rfc822");

            System.out.println("Sending mail...");

            Properties props = System.getProperties();

            props.put("mail.transport.protocol", "smtp");
            props.put("mail.smtp.host", "work.host.com");
            props.put("mail.smtp.auth", "true");
            props.put("mail.smtp.port", "25");
            props.put("mail.smtp.allow8bitmime", "true");               
            props.put("mail.debug", "true");

            Authenticator auth = new SMTPAuthenticator();
            Session session = Session.getDefaultInstance(props, auth);

            Address[] destinataris = new Address[9];

            String s_correuOrigen = "somemail@work.com";

            /**
             *  Copiado de Enviar Mail
             */

            MimeMessage msg = new MimeMessage(session);
            msg.addHeader("Return-Receipt-To", s_correuOrigen);
            msg.addHeader("Disposition-Notification-To", s_correuOrigen);
            msg.setFrom(new InternetAddress(s_correuOrigen));

            String s_destinataris = "";
            for (int d=0; d<destinatarios.size(); d++) {
                s_destinataris+=destinatarios.get(d);
                if (d!=destinatarios.size()-1) {
                    s_destinataris+=",";
                }
            }

            System.out.println("destinatarios: "+s_destinataris);

            System.out.println("mensaje UTF-8 : "+cuerpo);

            destinataris  = InternetAddress.parse(s_destinataris, false);
            MimeMultipart multiParte = new MimeMultipart();

            BodyPart texto = new MimeBodyPart();
            texto.setContent(cuerpo, "text/html; charset=UTF-8");

            multiParte.addBodyPart(texto);

            msg.setContent(multiParte);

            msg.setRecipients(Message.RecipientType.TO, destinataris);
            msg.setSubject("Resultat de l´enviament de correus","utf-8");

            Transport.send(msg);

            /*Message msg = new MimeMessage(session);
            msg.addHeader("Return-Receipt-To", s_correuOrigen);
            msg.addHeader("Disposition-Notification-To", s_correuOrigen);
            msg.setFrom(new InternetAddress(s_correuOrigen));

            destinataris  = InternetAddress.parse(destinatarios, false);

            MimeMultipart multiParte = new MimeMultipart();

            BodyPart texto = new MimeBodyPart();
            texto.setContent(cuerpo, "text/plain; charset=\"Cp1252\"");
            multiParte.addBodyPart(texto);

            msg.setContent(multiParte);

            msg.setRecipients(Message.RecipientType.TO, destinataris);
            msg.setSubject("Resultat de l´enviament de correus ");

            Transport.send(msg);*/



            /*Message msg = new MimeMessage(session);
            msg.addHeader("Return-Receipt-To", s_correuOrigen);
            msg.addHeader("Disposition-Notification-To", s_correuOrigen);
            msg.addHeader("From", s_correuOrigen);
            msg.addHeader("Sender", s_correuOrigen);
            msg.setFrom(new InternetAddress(s_correuOrigen));

            MimeMultipart multiParte = new MimeMultipart();
            BodyPart texto = new MimeBodyPart();
            texto.setContent(cuerpo, "text/html");
            multiParte.addBodyPart(texto);
            msg.setContent(multiParte);

            destinataris = InternetAddress.parse(destinatarios, false);
            msg.setRecipients(Message.RecipientType.TO, destinataris);
            msg.setSubject(asunto);

            Transport.send(msg);*/



            /*Transport transport = session.getTransport();

            MimeMessage message = new MimeMessage(session);
            message.setSubject(asunto);
            message.setFrom(new InternetAddress(s_correuOrigen));
            message.setContent(cuerpo, "text/html; charset=utf-8");

            for (int d=0; d<destinatarios.size(); d++) {
                message.addRecipient(Message.RecipientType.TO, new InternetAddress(destinatarios.get(d)));
            }

            transport.connect();
            transport.sendMessage(message, message.getRecipients(Message.RecipientType.TO));
            transport.close();*/



            /*MimeMessage msg = new MimeMessage(session);
            msg.setFrom(new InternetAddress(s_correuOrigen));
            msg.addRecipient(Message.RecipientType.TO, new InternetAddress("mymail@work.com"));

            Multipart mp = new MimeMultipart();
            MimeBodyPart htmlPart = new MimeBodyPart();
            htmlPart.setContent(cuerpo, "text/html");
            mp.addBodyPart(htmlPart);
            msg.setContent(mp);
            Transport.send(msg);*/
        }

    }catch (Exception ex) {
        ex.printStackTrace();
    }
}

-------------- 日志 ------------ ----------------------

Loading javamail.default.providers from jar:file:/C:/servidors/apache-tomcat-6.0.32/lib/mail.jar!/META-INF/javamail.default.providers
DEBUG: loading new provider protocol=imap, className=com.sun.mail.imap.IMAPStore, vendor=Sun Microsystems, Inc, version=null
DEBUG: loading new provider protocol=imaps, className=com.sun.mail.imap.IMAPSSLStore, vendor=Sun Microsystems, Inc, version=null
DEBUG: loading new provider protocol=smtp, className=com.sun.mail.smtp.SMTPTransport, vendor=Sun Microsystems, Inc, version=null
DEBUG: loading new provider protocol=smtps, className=com.sun.mail.smtp.SMTPSSLTransport, vendor=Sun Microsystems, Inc, version=null
DEBUG: loading new provider protocol=pop3, className=com.sun.mail.pop3.POP3Store, vendor=Sun Microsystems, Inc, version=null
DEBUG: loading new provider protocol=pop3s, className=com.sun.mail.pop3.POP3SSLStore, vendor=Sun Microsystems, Inc, version=null
Loading javamail.default.providers from jar:file:/C:/Users/andreus/workspaceP4H/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/p4h2013/WEB-INF/lib/mail-1.4.jar!/META-INF/javamail.default.providers
DEBUG: loading new provider protocol=imap, className=com.sun.mail.imap.IMAPStore, vendor=Sun Microsystems, Inc, version=null
DEBUG: loading new provider protocol=imaps, className=com.sun.mail.imap.IMAPSSLStore, vendor=Sun Microsystems, Inc, version=null
DEBUG: loading new provider protocol=smtp, className=com.sun.mail.smtp.SMTPTransport, vendor=Sun Microsystems, Inc, version=null
DEBUG: loading new provider protocol=smtps, className=com.sun.mail.smtp.SMTPSSLTransport, vendor=Sun Microsystems, Inc, version=null
DEBUG: loading new provider protocol=pop3, className=com.sun.mail.pop3.POP3Store, vendor=Sun Microsystems, Inc, version=null
DEBUG: loading new provider protocol=pop3s, className=com.sun.mail.pop3.POP3SSLStore, vendor=Sun Microsystems, Inc, version=null
DEBUG: getProvider() returning provider protocol=smtp; type=javax.mail.Provider$Type@7de9da21; class=com.sun.mail.smtp.SMTPTransport; vendor=Sun Microsystems, Inc
DEBUG: getProvider() returning provider protocol=smtp; type=javax.mail.Provider$Type@7de9da21; class=com.sun.mail.smtp.SMTPTransport; vendor=Sun Microsystems, Inc
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: trying to connect to host "work.host.com", port 25, isSSL false
220 llwg961.work.com ESMTP Postfix
DEBUG SMTP: connected to host "work.host.com", port: 25

EHLO PROGRAMACIO22
250-llwg961.work.com
250-PIPELINING
250-SIZE 26214400
250-ETRN
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250-ENHANCEDSTATUSCODES
250 8BITMIME
DEBUG SMTP: Found extension "PIPELINING", arg ""
DEBUG SMTP: Found extension "SIZE", arg "26214400"
DEBUG SMTP: Found extension "ETRN", arg ""
DEBUG SMTP: Found extension "AUTH", arg "LOGIN PLAIN"
DEBUG SMTP: Found extension "AUTH=LOGIN", arg "PLAIN"
DEBUG SMTP: Found extension "ENHANCEDSTATUSCODES", arg ""
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Attempt to authenticate
AUTH LOGIN
334 VXNlcm5hbWU6
YWxhcm1lc0BsaW1pdC5lcw==
334 UGFzc3dvcmQ6
ZThURG03JXFxYg==
235 2.7.0 Authentication successful
DEBUG SMTP: use8bit true
MAIL FROM:<somemail@work.com>
250 2.1.0 Ok
RCPT TO:<mymail@gmail.com>
250 2.1.5 Ok
DEBUG SMTP: Verified Addresses
DEBUG SMTP:   mymail@gmail.com
DATA
354 End data with <CR><LF>.<CR><LF>

------=_Part_0_1451711239.1417703117929
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<b>Buenos dias,<b>

Se ha detectado un cambio entre los dos =00faltimos tests del paciente Pacie=
nt Proves Centre 1. Vaya a la secci=C3=B3n de Informes de la aplicaci=C3=B3n=
 para terapeutas para ver la informaci=C3=B3n ampliada.

Un saludo.
------=_Part_0_1451711239.1417703117929--

.
250 2.0.0 Ok: queued as 84B431001522
QUIT
221 2.0.0 Bye
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: trying to connect to host "work.host.com", port 25, isSSL false
220 llwg961.work.com ESMTP Postfix
DEBUG SMTP: connected to host "work.host.com", port: 25

EHLO PROGRAMACIO22
250-llwg961.work.com
250-PIPELINING
250-SIZE 26214400
250-ETRN
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250-ENHANCEDSTATUSCODES
250 8BITMIME
DEBUG SMTP: Found extension "PIPELINING", arg ""
DEBUG SMTP: Found extension "SIZE", arg "26214400"
DEBUG SMTP: Found extension "ETRN", arg ""
DEBUG SMTP: Found extension "AUTH", arg "LOGIN PLAIN"
DEBUG SMTP: Found extension "AUTH=LOGIN", arg "PLAIN"
DEBUG SMTP: Found extension "ENHANCEDSTATUSCODES", arg ""
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Attempt to authenticate
AUTH LOGIN
334 VXNlcm5hbWU6
YWxhcm1lc0BsaW1pdC5lcw==
334 UGFzc3dvcmQ6
ZThURG03JXFxYg==
235 2.7.0 Authentication successful
DEBUG SMTP: use8bit true
MAIL FROM:<somemail@work.com>
250 2.1.0 Ok
RCPT TO:<mymail@work.com>
250 2.1.5 Ok
DEBUG SMTP: Verified Addresses
DEBUG SMTP:   mymail@work.com
DATA
354 End data with <CR><LF>.<CR><LF>

------=_Part_0_1451711239.1417703117929
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<b>Buenos dias,<b>

Se ha detectado un cambio entre los dos =00faltimos tests del paciente Pacie=
nt Proves Centre 1. Vaya a la secci=C3=B3n de Informes de la aplicaci=C3=B3n=
 para terapeutas para ver la informaci=C3=B3n ampliada.

Un saludo.
------=_Part_0_1451711239.1417703117929--

.
250 2.0.0 Ok: queued as 6DB81100152B
QUIT
221 2.0.0 Bye

这就是我收到的：

--------=_Part_0_1451711239.1417703117929 内容类型：文本/html；字符集=UTF-8 内容传输编码：引用打印

布宜诺斯艾利斯，

Se ha detectado un cambio entre los dos =00faltimos tests del paciente Pacie= nt Proves Center 1. Vaya a la secci=C3=B3n de Informes de la aplicaci=C3=B3n= para terapeutas para ver la informaci=C3= B3n ampliada。

联合国萨鲁多。 ------=_Part_0_1451711239.1417703117929--

outlook 和 gmail 一样。

至少发送了电子邮件！

我们将不胜感激。

【问题讨论】：

标签： java html encoding character-encoding jakarta-mail

【解决方案1】：

问题是这样的。我在两个不同的罐子里有 javax.mail 类。一方面，geronimo-javamail 是axis2-kernel（maven）的依赖项，另一方面，当我导入时，mail.jar 包含他的第一个库而不是第二个。

我在某处读到更改类路径中 jar 的顺序（右键单击，Eclipse 中的 java 构建路径，然后在“顺序和导出”选项卡上）可以解决问题，但使用 maven 不起作用。我所做的是排除这个库，在 pom 中进行更改：

  <dependency>
     <groupId> org.apache.axis2 </ groupId>
     <artifactId> axis2-kernel </ artifactId>
     <version> 1.4.1 </ version>
     <exclusions>
        <exclusion>
           <artifactId> geronimo-javamail_1.4_spec </ artifactId>
           <groupId> org.apache.geronimo.specs </ groupId>
        </ exclusion>
      </ exclusions>
  </ dependency>

所以，首先要确保您使用的是正确的库，并且您导入的类是您想要的（在 Eclipse 中，如果激活了“链接到编辑器”按钮，当您打开 .java 或 .class，项目资源管理器会转到该文件）。

代码如下：

        Properties props = System.getProperties();

        props.put("mail.transport.protocol", "smtp");
        props.put("mail.smtp.host", "work.mailing.es");
        props.put("mail.smtp.auth", "true");
        props.put("mail.debug", "false");

        Authenticator auth = new SMTPAuthenticator();
        Session session = Session.getDefaultInstance(props, auth);

        Address[] destinataris = new Address[9];

        MimeMessage msg = new MimeMessage(session);
        msg.addHeader("Return-Receipt-To", s_correuOrigen);
        msg.addHeader("Disposition-Notification-To", s_correuOrigen);
        msg.setFrom(new InternetAddress(s_correuOrigen));

        String s_destinataris = "";
        for (int d=0; d<destinatarios.size(); d++) {
            s_destinataris+=destinatarios.get(d);
            if (d!=destinatarios.size()-1) {
                s_destinataris+=",";
            }
        }

        System.out.println("destinatarios: "+s_destinataris);

        destinataris  = InternetAddress.parse(s_destinataris, false);
        MimeMultipart multiParte = new MimeMultipart();

        BodyPart texto = new MimeBodyPart();
        texto.setContent(cuerpo, "text/html; charset=UTF-8");

        multiParte.addBodyPart(texto);

        msg.setContent(multiParte);

        msg.setRecipients(Message.RecipientType.TO, destinataris);
        msg.setSubject(asunto,"utf-8");

        Transport.send(msg);

s_correuOrigen 是发件人的电子邮件，destinatarios 是字符串列表（收件人），asunto 是主题，cuerpo 是消息的正文。

另外，如果你想对邮件服务器进行身份验证，你可能需要这样的东西：

public class SMTPAuthenticator extends javax.mail.Authenticator {
    public PasswordAuthentication getPasswordAuthentication() {
        String username = "someone@somewhere.es";
        String password = "password";
        return new PasswordAuthentication(username, password);
    }
}

这对我有用，在消息正文中使用 html 代码、口音等。

感谢您的宝贵时间。

【讨论】：

【解决方案2】：

编辑

尝试替换

        MimeMultipart multiParte = new MimeMultipart();

        BodyPart texto = new MimeBodyPart();
        texto.setContent(cuerpo, "text/html; charset=UTF-8");

        multiParte.addBodyPart(texto);

        msg.setContent(multiParte);

        msg.setRecipients(Message.RecipientType.TO, destinataris);
        msg.setSubject("Resultat de l´enviament de correus","utf-8");

        Transport.send(msg);

与：

        MimeBodyPart mbp1 = new MimeBodyPart();
        mbp1.setContent(cuerpo, "text/html");

        // create the Multipart and add its parts to it
        Multipart mp = new MimeMultipart();
        mp.addBodyPart(mbp1);

        // add the Multipart to the message
        msg.setContent(mp, "text/html");

        // send the message
        Transport.send(msg);

换行

msg.setContent(multiParte);

到

msg.setContent(multiParte,"text/html");

【讨论】：

我用这个结果做了改变：
@Andrés_Serra 结果是什么？
抱歉，我用这个结果进行了更改：java.io.IOException: "text/html" DataContentHandler 需要 String 对象，被赋予了 javax.mail.internet.MimeMultipart 类型的对象所以我尝试了直接传递正文消息的字符串。问题 #3（电子邮件正文开头和结尾的奇怪代码）已经消失，其他问题仍在发生。我只是试图在正文的第一行添加一个“b”标签，但没有被解释。我没有提到即使将发件人添加到安全列表中，仍然会通过垃圾邮件更改主题。
同样的错误，函数 setContent 只接受 html 数据内容的字符串。我使用 maven，这是依赖项：javax.activationactivation1.1javax. mailmail1.4 但我只是意识到，该方法正在从另一个库中获取 de javax.mail 类！ geronimo-javamail_1.4_spec_1.2.jar 必须是这样的。我需要指向 javax.mail 实际库。
@Andrés_Serra 我现在看到了问题 :) 让我知道您更改后它是否有效