javamail 发送邮件的时候中间乱码是什么意思？：报错

你是想发送附件?我是用的common-email 组件,有做封装的,你有兴趣的话,可以看下它的源码吧.如果只是想实现功能的话,其实很简单的:

/**
 * 发送邮件，包含多个附件，发件人等配置信息在email.properties中配置
 * @param addr 收件人地址
 * @param subject 邮件主题
 * @param content 邮件内容
 * @param paths 多个附件地址
 */
public static void sendEmail(String addr,String subject,String content,String[] paths) {
	Pattern p = Pattern.compile("^([a-zA-Z0-9_\\-\\.]+)@((\\[[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.)|(([a-zA-Z0-9\\-]+\\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\\]?)$");   
	if(StringUtils.isBlank(addr) || !p.matcher(addr).matches()) {
		throw new IllegalArgumentException("the addr is not a legal email addrs:" + addr);
	}
	
	Map<String,String> map = EmailUtils.loadEmailConfig();
	HtmlEmail email = new HtmlEmail();
	try {
		email.setHostName(map.get("email.hostname"));
		email.setCharset(map.get("email.charset"));
		email.addTo(addr);
		email.setFrom(map.get("email.sender"));
		email.setAuthentication(map.get("email.auth.user"),
				map.get("email.auth.pwd"));
		email.setSubject(subject);
		email.setHtmlMsg(content);
		/**
		 * 添加附件
		 */
		for(EmailAttachment att : getAttachs(paths)) {
			email.attach(att);
		}
		email.send();
	} catch (EmailException e) {
		e.printStackTrace();
	}
}

private static List<EmailAttachment> getAttachs(String[]paths) {
	List<EmailAttachment> attachs = new ArrayList<EmailAttachment>();
	if(paths != null) {
		for(String path : paths) {
			EmailAttachment attach = new EmailAttachment();
			
			//解决附件的中文名称 乱码问题 */ 
			String encoding = System.getProperty("file.encoding");
			sun.misc.BASE64Encoder enc = new sun.misc.BASE64Encoder();
			String[] str = path.split("\\\\");
			String title = str[str.length-1];
			attach.setName("=?"+encoding+"?B?"+enc.encode(title.getBytes())+"?=");
			
			attach.setPath(path);
			attachs.add(attach);
		}
	}
	
	return attachs;
}