java发送带附件的邮件_java邮箱发送附件的三种方式是什么

java发邮件有三种方式：

一、使用javax.mail传统方式。需引入mail-1.4.jar包。这是用java自带的类库实现，但是实现起来比较麻烦。

二、使用Apache Commons Mail方式。需要引入commons-email-1.2.jar包。用MultiPartEmail对象，设置完邮箱信息和EmailAttachment附件对象后，使用send方法发送。

		//附件，可以定义多个附件对象
		EmailAttachment attachment = new EmailAttachment();
		attachment.setPath("C:\\123.txt");
		attachment.setDisposition(EmailAttachment.ATTACHMENT);
		attachment.setDescription("这是附件描述");
		MultiPartEmail email = new MultiPartEmail();
 
		email.setHostName("smtp.163.com");  //设置发送主机的服务器地址
		email.addTo("xxx");   //设置收件人邮箱
		email.setFrom("xxx");   //发件人邮箱
		email.setAuthentication("用户名", "密码");//设置发件人在邮件服务器上注册的用户名和密码  
		email.setCharset("UTF-8");    //设置主题的字符集 
		email.setSubject("你好, 这是邮件主题");  //设置邮件的主题
		email.setMsg("这是邮件正文部分");  //邮件正文内容
		email.attach(attachment);     //添加附件			
		email.send();

三、使用spring框架方式。需引入spring-context-support-4.3.9.jar包。使用MimeMessageHelper对象发送。

        JavaMailSender javaMailSender = new JavaMailSenderImpl();
        
        MimeMessage mailMessage = javaMailSender.createMimeMessage();
        MimeMessageHelper messageHelper = new MimeMessageHelper(mailMessage, true, "UTF-8");
        
        messageHelper.setTo(tos);//邮件接收人
        messageHelper.setFrom(text);//邮件内容 
        messageHelper.setSubject(subject);//主题
        messageHelper.setText(text, true);// true 表示启动HTML格式的邮件
        
        FileSystemResource file = new FileSystemResource(new File("c://123.txt"));
        messageHelper.addAttachment(AttachName, file);// 发送邮件
        javaMailSender.send(mailMessage);  

最后附上发邮件工具类：

配置类：

package cn.com.maxntech.email;
 
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
 
@Component("mailConfig")
@ConfigurationProperties(prefix = "application.email")
public class MailConfig {
    private String host;
    private String username;
    private String password;
    private String auth;
    //省略get set
}

工具类：

package cn.com.maxntech.hu.utils;
 
import java.io.File;
 
import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.io.FileSystemResource;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Component;
 
import cn.com.maxtech.email.MailConfig;
 
/**
 * 邮件发送工具类
 * */
@Component
public class SendMailUtils {
	
	@Autowired
	private MailConfig mailConfig;
	@Autowired
	private JavaMailSender javaMailSender;
 
    /**
     * 发送带html格式的邮件
     * @param tos
     * @param subject
     * @param text
     * @throws Exception
     */
	public void sendTextWithHtml(String[] tos, String subject, String text)  
            throws Exception {  
        MimeMessage mailMessage = javaMailSender.createMimeMessage();  
        initMimeMessageHelper(mailMessage, tos, mailConfig.getUsername(), subject, text);  
        // 发送邮件  
        javaMailSender.send(mailMessage);  
    }
 
    /**
     * 发送带图片的邮件
     * @param tos
     * @param subject
     * @param text
     * @param imgId
     * @param imgPath
     * @throws MessagingException
     */
    public void sendTextWithImg(String[] tos, String subject, String text,  
            String imgId, String imgPath) throws MessagingException {  
        MimeMessage mailMessage = javaMailSender.createMimeMessage();  
        MimeMessageHelper messageHelper = initMimeMessageHelper(mailMessage,tos,mailConfig.getUsername(),subject, text,true, true, "UTF-8");  
        // 发送图片  
        FileSystemResource img = new FileSystemResource(new File(imgPath));  
        messageHelper.addInline(imgId, img);  
        // 发送邮件  
        javaMailSender.send(mailMessage);  
    }
 
    /**
     * 发送带附件的邮件
     * @param tos
     * @param subject
     * @param text
     * @param AttachName
     * @param filePath
     * @throws MessagingException
     */
    public void sendWithAttament(String[] tos, String subject, String text,  
            String AttachName, String filePath) throws MessagingException {  
        MimeMessage mailMessage = javaMailSender.createMimeMessage();  
        MimeMessageHelper messageHelper = initMimeMessageHelper(mailMessage, tos, mailConfig.getUsername(), subject, text,  
                true, true, "UTF-8");  
        FileSystemResource file = new FileSystemResource(new File(filePath));  
        // 发送邮件  
        messageHelper.addAttachment(AttachName, file);  
        javaMailSender.send(mailMessage);  
    }
 
    /**
     * 发送带图片和附件的邮件
     * @param tos
     * @param from
     * @param subject
     * @param text
     * @param imgId
     * @param imgPath
     * @param AttachName
     * @param filePath
     * @throws MessagingException
     */
    public void sendWithAll(String[] tos, String from, String subject, String text,  
            String imgId, String imgPath, String AttachName, String filePath) throws MessagingException {  
        MimeMessage mailMessage = javaMailSender.createMimeMessage();  
        MimeMessageHelper messageHelper = initMimeMessageHelper(mailMessage, tos, mailConfig.getUsername(), subject, text,  
                true, true, "UTF-8");  
        // 插入图片  
        FileSystemResource img = new FileSystemResource(new File(imgPath));  
        messageHelper.addInline(imgId, img);  
        // 插入附件  
        FileSystemResource file = new FileSystemResource(new File(filePath));  
        messageHelper.addAttachment(AttachName, file);  
        // 发送邮件  
        javaMailSender.send(mailMessage);  
    }
 
    /**
     * 初始化helper
     * @param mailMessage
     * @param tos
     * @param from
     * @param subject
     * @param text
     * @return
     * @throws MessagingException
     */
    private  MimeMessageHelper initMimeMessageHelper(MimeMessage mailMessage, String[] tos, String from,  
            String subject, String text) throws MessagingException {  
        return initMimeMessageHelper(mailMessage, tos, from, subject, text, true, false, "UTF-8");  
    }
 
    /**
     * 初始化helper
     * @param mailMessage
     * @param tos
     * @param from
     * @param subject
     * @param text
     * @param isHTML
     * @param multipart
     * @param encoding
     * @return
     * @throws MessagingException
     */
    private static MimeMessageHelper initMimeMessageHelper(MimeMessage mailMessage, String[] tos, String from,  
            String subject, String text, boolean isHTML, boolean multipart, String encoding) throws MessagingException {  
        MimeMessageHelper messageHelper = new MimeMessageHelper(mailMessage, multipart, encoding);  
        messageHelper.setTo(tos);  
        messageHelper.setFrom(from);  
        messageHelper.setSubject(subject);  
        // true 表示启动HTML格式的邮件  
        messageHelper.setText(text, isHTML);  
        return messageHelper;  
    }  
}