Simple Java Mail郵件發送實現過程解析
前言
在我們日常工作中,郵件發送服務經常會用到,我們常用的java郵件服務實現方案有:java原生自帶的javamail、apache commons mail工具包、spring mail。但是個人使用這么久而言,感覺使用起來都不太順手,也略顯復雜
在此推薦一個簡單易用的類庫simple-java-mail
github地址: http://www.simplejavamail.org
下面我會介紹一下這個mail工具類的基本用法,不過基本都是來自于官網,隨后我會基于這個mail工具類去封裝一個基本通用的郵件服務。
maven引入
<dependency> <groupId>org.simplejavamail</groupId> <artifactId>simple-java-mail</artifactId> <version>4.2.3-java6-release</version></dependency>
例子
發送一封簡易郵件
寫法1 Builder模式:
Email email = new EmailBuilder().from('Michel Baker', '[email protected]').to('mom', '[email protected]').to('dad', '[email protected]').subject('My Bakery is finally open!').text('Mom, Dad. We did the opening ceremony of our bakery!!!').build();
new Mailer('server', 25, 'username', 'password').sendMail(email);
寫法二 常規模式:
Email email = new Email();
email.setFromAddress('Michel Baker', '[email protected]');email.addRecipient('mom', '[email protected]', RecipientType.TO);email.addRecipient('dad', '[email protected]', RecipientType.TO);email.setSubject('My Bakery is finally open!');email.setText('Mom, Dad. We did the opening ceremony of our bakery!!!');
new Mailer('server', 25, 'username', 'password').sendMail(email);
和spring結合使用
<bean class='org.simplejavamail.mailer.Mailer'> <constructor-arg value='server' /> <constructor-arg value='25' /> <constructor-arg value='username' /> <constructor-arg value='password' /></bean>@Autowired Mailer inhouseMailer; inhouseMailer.sendMail(email);inhouseMailer.sendMail(anotherEmail);
添加多個接收者
//添加多個接收者email.addRecipients(yourRecipient1, yourRecipient2...);//也可以通過逗號“,”分割多個抄送人String list = '[email protected],[email protected];[email protected]';emailNormal.addRecipients(list, RecipientType.BCC);
builder模式:.to(yourRecipient1, yourRecipient2...).bcc('[email protected],[email protected];[email protected]')....build();
支持異步發送
// 第二個參數是true則是異步發送,false則是同步發送mailer.sendMail(email, true);
配置SSL或TLS
Email email = new Email();
mailer.sendMail(email, TransportStrategy.SMTP_PLAIN); // 此為默認值,不加嵌套任何傳輸協議mailer.sendMail(email, TransportStrategy.SMTP_SSL);mailer.sendMail(email, TransportStrategy.SMTP_TLS);
我們也可以在初始化郵件服務器配置時聲明傳輸協議
new Mailer('smtp.gmail.com', 25, 'your user', 'your password', TransportStrategy.SMTP_TLS).sendMail(email);new Mailer('smtp.gmail.com', 587, 'your user', 'your password', TransportStrategy.SMTP_TLS).sendMail(email);new Mailer('smtp.gmail.com', 465, 'your user', 'your password', TransportStrategy.SMTP_SSL).sendMail(email);
發送附件
Email email = new Email();
email.addAttachment('dresscode.txt', new ByteArrayDataSource('Black Tie Optional', 'text/plain'));email.addAttachment('location.txt', 'On the moon!'.getBytes(Charset.defaultCharset()), 'text/plain');
// 當然,你可以傳輸任何文件格式的附件
email.addAttachment('invitation.pdf', new FileDataSource('invitation_v8.3.pdf'));
內容嵌套圖片
Email email = new Email();
email.addEmbeddedImage('smiley', new FileDataSource('smiley.jpg'));
String base64String = 'iVBORw0KGgoAAAANSUhEUgAAA ...snip';email.addEmbeddedImage('thumbsup', parseBase64Binary(base64String), 'image/png');
// 圖片需要在html文本中通過cid:xxxx,的方式引用<p>Let’s go!</p><br/><p>Smile!</p>
自定義發送頭
Email email = new Email();
email.addHeader('X-Priority', 2);email.addHeader('X-MC-GoogleAnalyticsCampaign', 'halloween_sale');email.addHeader('X-MEETUP-RECIP-ID', '71415272');email.addHeader('X-my-custom-header', 'foo');
驗證郵箱合法性
具體使用的工具類是email-rfc2822-validator
github地址:https://github.com/bbottema/email-rfc2822-validator
//經過使用發現,貌似只是用正則表達式去驗證郵箱是否合法EmailAddressValidator.isValid('[email protected]',EmailAddressCriteria.RFC_COMPLIANT);EmailAddressValidator.isValid('[email protected]',EnumSet.of(EmailAddressCriteria.ALLOW_QUOTED_IDENTIFIERS, EmailAddressCriteria.ALLOW_PARENS_IN_LOCALPART));
使用代理發送
// anonymous proxynew Mailer(serverConfig, new ProxyConfig('proxy.host.com', 1080));
// authenticated proxynew Mailer(serverConfig, new ProxyConfig('proxy.host.com', 1080, 'proxy username', 'proxy password'));
總結
此工具類方便易用,簡潔明了,而且支持Builder模式鏈式調用。有興趣的同學可以嘗試使用,個人感覺比原生mail,spring mail等易用,更多用法請自行查看官網例子。至于一開始說到的封裝通用的郵件服務,這個由于時間關系,我放到下一次再實現。謝謝大家的支持,如果此文對你有所幫助,請點個贊,謝謝。
https://github.com/bbottema/simple-java-mail/
以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支持好吧啦網。
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