前言

在我們?nèi)粘９ぷ髦?，郵件發(fā)送服務(wù)經(jīng)常會用到，我們常用的java郵件服務(wù)實現(xiàn)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(fù)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(wǎng)，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(wù)。

maven引入

<dependency>
  <groupId>org.simplejavamail</groupId>
  <artifactId>simple-java-mail</artifactId>
  <version>4.2.3-java6-release</version>
</dependency>

例子

發(fā)送一封簡易郵件

寫法1 Builder模式：

Email email = new EmailBuilder()
.from("Michel Baker", "m.baker@mbakery.com")
.to("mom", "jean.baker@hotmail.com")
.to("dad", "StevenOakly1963@hotmail.com")
.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(guī)模式：

Email email = new Email();

email.setFromAddress("Michel Baker", "m.baker@mbakery.com");
email.addRecipient("mom", "jean.baker@hotmail.com", RecipientType.TO);
email.addRecipient("dad", "StevenOakly1963@hotmail.com", 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(jié)合使用

<bean id="inhouseMailer" 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 = "twister@sweets.com,blue.tongue@sweets.com;honey@sweets.com";
emailNormal.addRecipients(list, RecipientType.BCC);

builder模式：
.to(yourRecipient1, yourRecipient2...)
.bcc("twister@sweets.com,blue.tongue@sweets.com;honey@sweets.com")
...
.build();

支持異步發(fā)送

// 第二個參數(shù)是true則是異步發(fā)送，false則是同步發(fā)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(xié)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(wù)器配置時聲明傳輸協(xié)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(fā)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(nèi)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(fā)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(jīng)過使用發(fā)現(xiàn)，貌似只是用正則表達式去驗證郵箱是否合法
EmailAddressValidator.isValid("your_address@domain.com",
EmailAddressCriteria.RFC_COMPLIANT);
EmailAddressValidator.isValid("your_address@domain.com",
EnumSet.of(EmailAddressCriteria.ALLOW_QUOTED_IDENTIFIERS, EmailAddressCriteria.ALLOW_PARENS_IN_LOCALPART));

使用代理發(fā)送

// anonymous proxy
new Mailer(serverConfig, new ProxyConfig("proxy.host.com", 1080));

// authenticated proxy
new Mailer(serverConfig, new ProxyConfig("proxy.host.com", 1080, "proxy username", "proxy password"));

總結(jié)

此工具類方便易用，簡潔明了，而且支持Builder模式鏈式調(diào)用。有興趣的同學(xué)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(wǎng)例子。至于一開始說到的封裝通用的郵件服務(wù)，這個由于時間關(guān)系，我放到下一次再實現(xiàn)。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(nèi)容，希望對大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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