通过SpringMail API发送邮件

最新推荐文章于 2021-01-16 19:52:45 发布

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本文介绍了如何利用SpringMail API进行邮件发送，包括添加maven依赖，封装发送者信息，以及分别发送文本、HTML格式、嵌套图片和包含附件的邮件。

通过SpringMail API发送邮件

使用JavaMail API也可以简单的实现发送邮件，当然通过SpringMail来发送也是很简单的。
SpringMail提供了几个API用户发送不同形式的邮件：
- JavaMailSenderImpl：邮件发送器的封装，实现发送者的配置。
- SimpleMailMessage：对邮件的简单封装，只能发送一个纯文本邮件。
- MimeMailMessage：对MIME信件的封装，可以发送html格式的邮件。
- MimeMessageHelper：对MimeMailMessage封装并进行一些处理。

1.maven添加依赖

因为SpringFramework里面已经封装了SpringMail API，所以只要导入javax.mail就行了。

<dependency>
    <groupId>javax.mail</groupId>
    <artifactId>mail</artifactId>
    <version>1.4.1</version>
</dependency>

2.封装一个对象来保存发送者信息


@Entity
@Table(name = "MAIL_SENDER_INFO")
public class MailSenderInfo{
    // 用户名
    private String username;
    // 密码
    private String password;
    // 主机
    private String host;
    // 发送者
    private String from;
    // 抄送
    private String cc;
    // 密送
    private String bcc;

    // getter and setter ...
}

3.发送简单的文本邮件

import java.util.Properties;  

import org.springframework.mail.SimpleMailMessage;  
import org.springframework.mail.javamail.JavaMailSenderImpl;  

public class SimpleMailSender  
{  
    public void sendEmail((MailSenderInfo mailSenderInfo, String to, String subject, String content)
    {  
        JavaMailSenderImpl senderImpl = new JavaMailSenderImpl();   
        senderImpl.setHost(mailSenderInfo.getHost());  

        SimpleMailMessage mailMessage = new SimpleMailMessage();   
        mailMessage.setTo(to);  
        mailMessage.setFrom(mailSenderInfo.getFrom());  
        mailMessage.setSubject(subject);  
        mailMessage.setText(content);  

        senderImpl.setUsername(mailSenderInfo.getUsername()); 
        senderImpl.setPassword(mailSenderInfo.getPassword(); 

        Properties prop = new Properties();  
        prop.put(" mail.smtp.auth ", " true "); 
        senderImpl.setJavaMailProperties(prop);  

        senderImpl.send(mailMessage);  
    }  
}

4.发送简单的html格式邮件

public class SimpleMailSender  
{  
    public void sendEmail((MailSenderInfo mailSenderInfo, String to, String subject, String content)
    {  
        JavaMailSenderImpl senderImpl = new JavaMailSenderImpl();     
        // set mail server
        senderImpl.setHost(mailSenderInfo.getHost());
        // sreate mail message
        MimeMessage mailMessage = senderImpl.createMimeMessage();

        // multipart mode, able to send html message
        MimeMessageHelper messageHelper = new MimeMessageHelper(mailMessage, true, "utf-8");
        // set sender info
        messageHelper.setFrom(mailSenderInfo.getFrom());
        if (mailSenderInfo.getCc() != null) {
            messageHelper.setCc(mailSenderInfo.getCc());
        }
        if (mailSenderInfo.getBcc() != null) {
            messageHelper.setCc(mailSenderInfo.getBcc());
        }

        messageHelper.setTo(to);
        messageHelper.setSubject(subject);
        // true to set html enabled
        messageHelper.setText("<html><head></head><body><h1>"+ content +"</h1></body></html>", true);

        senderImpl.setUsername(mailSenderInfo.getUsername());
        senderImpl.setPassword(mailSenderInfo.getPassword());

        Properties prop = new Properties();
        prop.put("mail.smtp.auth", "true"); // mail server auth username
                                            // password
        senderImpl.setJavaMailProperties(prop);

        // send email
        senderImpl.send(mailMessage);
    }  
}

5.发送嵌套图片的邮件

public class SimpleMailSender  
{  
    public void sendEmail((MailSenderInfo mailSenderInfo, String to, String subject, String content, String imagePath)
    {  
        JavaMailSenderImpl senderImpl = new JavaMailSenderImpl();     
        // set mail server
        senderImpl.setHost(mailSenderInfo.getHost());
        // sreate mail message
        MimeMessage mailMessage = senderImpl.createMimeMessage();

        // multipart mode, able to send html message
        MimeMessageHelper messageHelper = new MimeMessageHelper(mailMessage, true, "utf-8");
        // set sender info
        messageHelper.setFrom(mailSenderInfo.getFrom());
        if (mailSenderInfo.getCc() != null) {
            messageHelper.setCc(mailSenderInfo.getCc());
        }
        if (mailSenderInfo.getBcc() != null) {
            messageHelper.setCc(mailSenderInfo.getBcc());
        }

        messageHelper.setTo(to);
        messageHelper.setSubject(subject);
        // true to set html enabled
        messageHelper.setText("<html><head></head><body><h1>"+ content +"</h1><img src=\"cid:image\"/></body></html>", true);

        FileSystemResource img = new FileSystemResource(new File(imagePath)); 

        messageHelper.addInline("image", img); 

        senderImpl.setUsername(mailSenderInfo.getUsername());
        senderImpl.setPassword(mailSenderInfo.getPassword());

        Properties prop = new Properties();
        prop.put("mail.smtp.auth", "true"); // mail server auth username
                                            // password
        senderImpl.setJavaMailProperties(prop);

        // send email
        senderImpl.send(mailMessage);
    }  
}

6.发送包含附件的邮件

public class SimpleMailSender  
{  
    public void sendEmail((MailSenderInfo mailSenderInfo, String to, String subject, String content, String filePath)
    {  
        JavaMailSenderImpl senderImpl = new JavaMailSenderImpl();     
        // set mail server
        senderImpl.setHost(mailSenderInfo.getHost());
        // sreate mail message
        MimeMessage mailMessage = senderImpl.createMimeMessage();

        // multipart mode, able to send html message
        MimeMessageHelper messageHelper = new MimeMessageHelper(mailMessage, true, "utf-8");
        // set sender info
        messageHelper.setFrom(mailSenderInfo.getFrom());
        if (mailSenderInfo.getCc() != null) {
            messageHelper.setCc(mailSenderInfo.getCc());
        }
        if (mailSenderInfo.getBcc() != null) {
            messageHelper.setCc(mailSenderInfo.getBcc());
        }

        messageHelper.setTo(to);
        messageHelper.setSubject(subject);
        // true to set html enabled
        messageHelper.setText("<html><head></head><body><h1>"+ content +"</h1></body></html>", true);

        FileSystemResource img = new FileSystemResource(new File(filePath)); 

         messageHelper.addAttachment("attachment.txt", file);

        senderImpl.setUsername(mailSenderInfo.getUsername());
        senderImpl.setPassword(mailSenderInfo.getPassword());

        Properties prop = new Properties();
        prop.put("mail.smtp.auth", "true"); // mail server auth username
                                            // password
        senderImpl.setJavaMailProperties(prop);

        // send email
        senderImpl.send(mailMessage);
    }  
}