Java Mail 发送邮件
转自梁桂钊的博客
Spring 对 Java Mail 有很好的支持。因此，Spring Boot 也提供了自动配置的支持。
Spring Boot 集成 Java Mail
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
</dependency>
在 src/main/resources/application.properties 中配置邮件信息，网易邮箱为例
spring.mail.host=smtp.163.com
spring.mail.username=请输入用户名
spring.mail.password=请输入密码
spring.mail.port=25
spring.mail.protocol=smtp
spring.mail.default-encoding=UTF-8
我们通过编写单元测试用例，测试 Java Mail 是否正常工作。值得注意的是，邮件包括几种类型：简单文本的邮件、 HTML 文本的邮件、 内嵌图片的邮件、 包含附件的邮件。
@RunWith(SpringJUnit4ClassRunner.class)
@SpringApplicationConfiguration(WebMain.class)
public class SpringMailTest {
@Autowired
private JavaMailSenderImpl mailSender;
/**
* 发送包含简单文本的邮件
*/
@Test
public void sendTxtMail() {
SimpleMailMessage simpleMailMessage = new SimpleMailMessage();
// 设置收件人，寄件人
simpleMailMessage.setTo(new String[] {"lianggzone@163.com"});
simpleMailMessage.setFrom("lianglevel@163.com");
simpleMailMessage.setSubject("Spring Boot Mail 邮件测试【文本】");
simpleMailMessage.setText("这里是一段简单文本。");
// 发送邮件
mailSender.send(simpleMailMessage);
System.out.println("邮件已发送");
}
/**
* 发送包含HTML文本的邮件
* @throws Exception
*/
@Test
public void sendHtmlMail() throws Exception {
MimeMessage mimeMessage = mailSender.createMimeMessage();
MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMessage);
mimeMessageHelper.setTo("lianggzone@163.com");
mimeMessageHelper.setFrom("lianglevel@163.com");
mimeMessageHelper.setSubject("Spring Boot Mail 邮件测试【HTML】");
StringBuilder sb = new StringBuilder();
sb.append("<html><head></head>");
sb.append("<body><h1>spring 邮件测试</h1><p>hello!this is spring mail test。</p></body>");
sb.append("</html>");
// 启用html
mimeMessageHelper.setText(sb.toString(), true);
// 发送邮件
mailSender.send(mimeMessage);
System.out.println("邮件已发送");
}
/**
* 发送包含内嵌图片的邮件
* @throws Exception
*/
@Test
public void sendAttachedImageMail() throws Exception {
MimeMessage mimeMessage = mailSender.createMimeMessage();
// multipart模式
MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMessage, true);
mimeMessageHelper.setTo("lianggzone@163.com");
mimeMessageHelper.setFrom("lianglevel@163.com");
mimeMessageHelper.setSubject("Spring Boot Mail 邮件测试【图片】");
StringBuilder sb = new StringBuilder();
sb.append("<html><head></head>");
sb.append("<body><h1>spring 邮件测试</h1><p>hello!this is spring mail test。</p>");
// cid为固定写法，imageId指定一个标识
sb.append("<img src=\"cid:imageId\"/></body>");
sb.append("</html>");
// 启用html
mimeMessageHelper.setText(sb.toString(), true);
// 设置imageId
FileSystemResource img = new FileSystemResource(new File("D:/images/01.jpg"));
mimeMessageHelper.addInline("imageId", img);
// 发送邮件
mailSender.send(mimeMessage);
System.out.println("邮件已发送");
}
/**
* 发送包含附件的邮件
* @throws Exception
*/
@Test
public void sendAttendedFileMail() throws Exception {
MimeMessage mimeMessage = mailSender.createMimeMessage();
// multipart模式
MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMessage, true, "utf-8");
mimeMessageHelper.setTo("lianggzone@163.com");
mimeMessageHelper.setFrom("lianglevel@163.com");
mimeMessageHelper.setSubject("Spring Boot Mail 邮件测试【附件】");
StringBuilder sb = new StringBuilder();
sb.append("<html><head></head>");
sb.append("<body><h1>spring 邮件测试</h1><p>hello!this is spring mail test。</p></body>");
sb.append("</html>");
// 启用html
mimeMessageHelper.setText(sb.toString(), true);
// 设置附件
FileSystemResource img = new FileSystemResource(new File("D:/images/01.jpg"));
mimeMessageHelper.addAttachment("image.jpg", img);
// 发送邮件
mailSender.send(mimeMessage);
System.out.println("邮件已发送");
}
}
