Spring发送邮件如何内嵌图片增加附件

package test;

import java.util.Properties;
import javax.mail.Session;
import javax.mail.internet.MimeMessage;
import org.springframework.core.io.ClassPathResource;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;

/**
 * 这里不做异常处理
 */
public class SendMail {
	public static void main(String[] args) throws Exception{
		// 发送器
		JavaMailSenderImpl sender = new JavaMailSenderImpl();
		sender.setHost("smtp.163.com");
		sender.setPort(25); // 默认就是25
		sender.setUsername("用户@163.com"); 
		sender.setPassword("密码");
		sender.setDefaultEncoding("UTF-8");
		
		// 配置文件对象
    Properties props = new Properties();  
    props.put("mail.smtp.auth", "true"); // 是否进行验证
		Session session = Session.getInstance(props);
		sender.setSession(session); // 为发送器指定会话
		
		MimeMessage mail = sender.createMimeMessage();
		MimeMessageHelper helper = new MimeMessageHelper(mail, true);
		helper.setTo("用户@163.com"); // 发送给谁
		helper.setSubject("强哥邀请，谁敢不从！"); // 标题
		helper.setFrom("用户@163.com"); // 来自
		// 邮件内容，第二个参数指定发送的是HTML格式
		helper.setText("<font color='red'>强哥邀请你访问我的博客：http://cuisuqiang.iteye.com/！</font><br><img src='cid:myImg'>",true);
		// 增加CID内容
		ClassPathResource img = new ClassPathResource("abc.jpg");
		helper.addInline("myImg", img);
		// 增加附件
		ClassPathResource file = new ClassPathResource("abc.zip");
		helper.addAttachment("abc.zip", file);
		
		sender.send(mail); // 发送
		
		System.out.println("邮件发送成功");
	}
}