java 邮件 tls_通过TLS发送的Java邮件

深碍√TFBOYSˉ_ 2023-02-25 04:58 32阅读 0赞

java 邮件 tls

## 抽象 ##

本博客的目的是演示如何使用Java Mail通过具有TLS连接的SMTP服务器发送电子邮件。

## 免责声明 ##

这篇文章仅供参考。 在使用所提供的任何信息之前，请认真思考。 从中学到东西，但最终自己做出决定，风险自负。

## 要求 ##

我使用以下主要技术完成了本文的所有工作。 您可能可以使用不同的技术或版本来做相同的事情，但不能保证。

*  NetBeans 11.2
 *  Maven 3.3.9（与NetBeans捆绑在一起）
 *  Java 11（zulu11.35.15-ca-jdk11.0.5-win\_x64）

<dependency> 
       <groupId>javax.mail</groupId> 
       <artifactId>mail</artifactId> 
       <version> 1.4 </version> 
       <scope>test</scope>  </dependency>

## 下载 ##

访问我的GitHub页面[https://github.com/mjremijan][https_github.com_mjremijan]以查看我所有的开源项目。 这篇文章的代码位于[thoth-email-via-tls][]模块中的[https://github.com/mjremijan/thoth-email][https_github.com_mjremijan_thoth-email] 。

## 物产 ##

本示例使用`smtp-tls-outlook.properties`文件保存SMTP服务器信息。 我用我个人的Outlook帐户进行测试，因此使用这个词的`outlook`属性文件中的名称。 重要的是文件的内容，如清单1所示。

## 清单1 –属性文件 ##

# This is the name of the SMTP host machine.  host=  # This is the port number of the SMTP host machine.  # The same host may support both SSL and TLS but on  # different ports. So make sure you get the TLS port.  port=  # This is what you use in the “username” field when  # you login. Typically # you login. Typically this is the same as your email  # address, but this isn't always the case .  username=  # This is what you use in the “password” field when  # you login. This value is CLEAR TEXT, so keep # you login. This value is CLEAR TEXT, so keep this  # properties file safe.  password=  # This is the email address you want for the  # email's FROM field. Enter the value using  # the format shown below. Typically # the format shown below. Typically this is  # just your email address for the account.  from=FIRSTNAME LASTNAME <ADDRESS @EMAIL .COM>  # This is the email address you want for the  # email's REPLY_TO field. Enter the value using  # the format shown below. Typically # the format shown below. Typically this is  # just your email address for the account. Also the account. Also  # typically this is the same as `from` above.  # But be warned, if an email's FROM and REPLY_TO  # are different, that's may be flagged as spam  # and never be delivered. So keep `from` and  # `reply` the same for initial testing  reply=FIRSTNAME LASTNAME <ADDRESS @EMAIL .COM>  # This is the email address you want to send  # the email to. For testing, it's a good idea  # to send it to yourself first.  to=FIRSTNAME LASTNAME <ADDRESS @EMAIL .COM>

现在您有了一个属性文件，接下来让我们看一下代码。

## 码 ##

这是一个JUnit测试，演示了如何使用Java Mail通过具有TLS连接的SMTP服务器发送电子邮件。 清单2显示了代码。

**注意**对于初始测试，请始终检查您的SPAM文件夹。 可以始终添加一条规则以将其传递到您的INBOX。

## 清单2 – Java Mail示例 ##

package org.thoth.email.via.tls;  import java.net.InetAddress;  import java.text.SimpleDateFormat;  import java.util.Date;  import java.util.Properties;  import javax.mail.Authenticator;  import javax.mail.Message;  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 org.junit.jupiter.api.BeforeEach;  import org.junit.jupiter.api.Test;  public class TlsTest { 
       public TlsTest() { 
       } 
       String now, hostname; protected String now, hostname; 
       protected Properties outlook; 
       @BeforeEach 
       public void setUp() throws Exception { 
         now = new SimpleDateFormat( "MM-dd-yyyy hh:mm:ss a" ).format( new Date()); 
         hostname = InetAddress.getLocalHost().getHostName(); 
         outlook = new Properties(); 
         outlook.load( this .getClass().getResourceAsStream( "/smtp-tls-outlook.properties" )); 
       } 
       @Test 
       public void a_test() throws Exception { 
         // Create MimeMultipart 
         MimeMultipart content = new MimeMultipart( "related" ); 
         // html part 
         { 
           MimeBodyPart textPart = new MimeBodyPart(); 
           textPart.setText( "<html><body>" 
             + "<p>Time: " +now+ "</p>" 
             + "<p>From: " +hostname+ "</p>" 
             + "</body></html>" 
             , "UTF8" , "html" ); 
           content.addBodyPart(textPart); 
         } 
         // properties 
         Properties props = new Properties(); 
         { 
           props.setProperty( "mail.smtp.auth" , "true" ); 
           props.setProperty( "mail.smtp.host" , outlook.getProperty( "host" )); 
           props.setProperty( "mail.smtp.port" , outlook.getProperty( "port" )); 
           props.setProperty( "mail.smtp.starttls.enable" , "true" ); 
         } 
         Session smtp = null ; 
         { 
           smtp = Session.getInstance(props, new Authenticator() { 
             @Override 
             protected PasswordAuthentication getPasswordAuthentication() { 
               return new PasswordAuthentication( 
                   outlook.getProperty( "username" ) 
                 , outlook.getProperty( "password" ) 
               ); 
             } 
           }); 
           smtp.setDebug( true ); 
           smtp.setDebugOut(System.out); 
         } 
         MimeMessage m = new MimeMessage(smtp); 
         { 
           m.setRecipient(Message.RecipientType.TO, new InternetAddress(outlook.getProperty( "to" ))); 
           m.setSubject( "thoth-email TLS test " + now); 
           InternetAddress from = null ; 
           { 
             from = new InternetAddress(outlook.getProperty( "from" )); 
             from.setPersonal( "Thoth Email" ); 
             m.setFrom(from); 
           } 
           InternetAddress reply = null ; 
           { 
             reply = new InternetAddress(outlook.getProperty( "reply" )); 
             m.setReplyTo( new InternetAddress[] {reply}); 
           } 
           m.setContent(content); 
         } 
         Transport.send(m); 
       }  }

## 摘要 ##

发送邮件的代码不是很困难。 成功接收电子邮件而不将其标记为垃圾邮件是另一回事。 但是，如果您遵循此示例，请使用有效的帐户，并且不要过度使用它，则应该可以。 该博客显示了如何使用Java Mail通过具有TLS连接的SMTP服务器发送电子邮件。

> 翻译自: [https://www.javacodegeeks.com/2020/02/java-mail-sent-over-tls.html][https_www.javacodegeeks.com_2020_02_java-mail-sent-over-tls.html]

java 邮件 tls

[https_github.com_mjremijan]: https://github.com/mjremijan
[thoth-email-via-tls]: https://github.com/mjremijan/thoth-email/tree/master/thoth-email-via-tls
[https_github.com_mjremijan_thoth-email]: https://github.com/mjremijan/thoth-email
[https_www.javacodegeeks.com_2020_02_java-mail-sent-over-tls.html]: https://www.javacodegeeks.com/2020/02/java-mail-sent-over-tls.html