如何用Spring發(fā)送電子郵件

更新時間：2021年02月25日 11:33:11 作者：布禾

這篇文章主要介紹了如何用Spring發(fā)送電子郵件，幫助大家更好的理解和使用Java，感興趣的朋友可以了解下

簡介

Spring基于javax.mail封裝了一套用于發(fā)送電子郵件的API，位于org.springframework.mail包下，下面將介紹下發(fā)送普通文本郵件和基于thymeleaf模版的郵件。

普通郵件

導入javax.mail依賴

<!-- ...... -->
<!-- 省略Spring依賴 -->
<dependency>
 <groupId>com.sun.mail</groupId>
 <artifactId>javax.mail</artifactId>
 <version>1.6.2</version>
</dependency>

Spring配置類

@PropertySource(value="classpath:mail.properties")
@Configuration
public class SpringConfig {
	@Autowired
	Environment environment;
	
	/**
	 * Spring郵件配置
	 */
	@Bean
	public JavaMailSenderImpl javaMailSenderImpl(){
		JavaMailSenderImpl javaMailSenderImpl = new JavaMailSenderImpl();
		javaMailSenderImpl.setHost(environment.getProperty("mail.host"));
		javaMailSenderImpl.setUsername(environment.getProperty("mail.username"));
		javaMailSenderImpl.setPassword(environment.getProperty("mail.password"));
		javaMailSenderImpl.setDefaultEncoding(environment.getProperty("mail.encoding"));
		return javaMailSenderImpl;
	}
}

郵件配置：mail.properties

#QQ郵箱發(fā)送郵件服務器
mail.host=smtp.qq.com
#QQ郵箱賬戶名
mail.username=xxxxxx@qq.com
#QQ郵箱授權碼，開啟IMAP/SMTP服務時會生成
mail.password=lrorsapyffcwbegg
#郵件發(fā)送編碼
mail.encoding=UTF-8

測試

@RunWith(SpringRunner.class)
@ContextConfiguration(classes=SpringConfig.class)
public class MailTest {
	@Autowired
	private JavaMailSenderImpl javaMailSenderImpl;
	
	@Test
	public void testSimpleMail() throws MessagingException{
		MimeMessage message = javaMailSenderImpl.createMimeMessage();
		
		//發(fā)送帶附件和內聯(lián)元素的郵件需要將第二個參數(shù)設置為true
		MimeMessageHelper helper = new MimeMessageHelper(message, true);
		
		//發(fā)送方郵箱，和配置文件中的mail.username要一致
		helper.setFrom("xxxxxx@qq.com");
		
		//接收方
		helper.setTo("xxxxxx@qq.com");
		
		//主題
		helper.setSubject("郵件測試");
		
		//郵件內容
		helper.setText("<html><body><img src='cid:myphoto'></body></html>", true);
		
		//郵件內容內嵌的圖片,addInline中的contentId要和郵件內容中的cid相對應
		FileSystemResource res = new FileSystemResource(new File("e:/yc/1.jpg"));
		helper.addInline("myphoto", res);
		
		//郵件附件
		FileSystemResource file = new FileSystemResource(new File("e:/yc/myphoto.zip"));
		helper.addAttachment("myphoto.zip", file);
		
		javaMailSenderImpl.send(message);
	}
}

基于thymeleaf模版的郵件

導入thymeleaf-spring依賴

<dependency>
 <groupId>org.thymeleaf</groupId>
 <artifactId>thymeleaf-spring4</artifactId>
 <version>3.0.11.RELEASE</version>
</dependency>

Spring配置類中添加thymeleaf模板配置

	@Bean
 public TemplateEngine emailTemplateEngine() {
  SpringTemplateEngine templateEngine = new SpringTemplateEngine();
  ClassLoaderTemplateResolver templateResolver = new ClassLoaderTemplateResolver();
  templateResolver.setResolvablePatterns(Collections.singleton("*.html"));
  templateResolver.setPrefix("/templates/");
  templateResolver.setSuffix(".html");
  templateResolver.setTemplateMode(TemplateMode.HTML);
  templateResolver.setCharacterEncoding("UTF-8");
  templateResolver.setCacheable(false);
  templateEngine.addTemplateResolver(templateResolver);
  return templateEngine;
 }

模版文件：/src/main/resources/templates/msg.html

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
 <head>
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
 <style type="text/css">span{color:orange}</style>
 </head>
 <body>
 <p>
  	您好， <span th:text="${name}">xxx</span>，感謝您使用XXX服務，您正在進行郵箱驗證，本次請求的驗證碼為：
 </p>
 <p><span th:text="${validCode}">1111</span>(為了保障您帳號的安全性，請在1小時內完成驗證。)</p>
 <p>
  	XXX團隊<br />
  	2019年06月06日
 </p>
 </body>
</html>

測試

	@Autowired
	private TemplateEngine emailTemplateEngine;
	
	@Test
	public void testTemplateMail() throws MessagingException{
		MimeMessage message = javaMailSenderImpl.createMimeMessage();
		MimeMessageHelper helper = new MimeMessageHelper(message, true);
		helper.setFrom("xxxxxx@qq.com");
		helper.setTo("xxxxxx@qq.com");
		helper.setSubject("郵件測試");
		
		//thymeleaf模版解析成String
		Context ctx = new Context();
		ctx.setVariable("name", "小姐姐");
		ctx.setVariable("validCode", "88888888");
		String htmlContent = emailTemplateEngine.process("msg.html", ctx);
		helper.setText(htmlContent, true);
		
		javaMailSenderImpl.send(message);
	}