java邮件开发遇到no mimebodypart content

java邮件开发遇到no mimebodypart content
这里写的是一个复杂的邮件，里面包含附件和图片（注意看红色的字体）
源代码：

public static void main(String[] args) {//Properties:配置文件，Properties properties = new Properties();//设置QQ邮箱服务器进行ssl验证  properties.setProperty("mail.smtp.ssl.enable", "true");//QQ邮箱发送的协议为stmp    properties.setProperty("mail.transport.protocol", "smtp");Session session = Session.getInstance(properties);session.setDebug(true);//Message:创建和解析邮件内容Message msg = new MimeMessage(session);try {    //设置发送者的信息    msg.setFrom(new InternetAddress("[e-mail]"));    //设置显示邮件的标题名称为‘你最尊敬的大佬’    msg.setFrom(new InternetAddress("\""+ MimeUtility.encodeText("你最尊敬的大佬") +"\"<[e-mail]> "));} catch (MessagingException e1) {        // TODO Auto-generated catch block        e1.printStackTrace();    }//指明整个邮件的架构，包括正文和附件MimeMultipart msgMultipart = new MimeMultipart("mixed");try {       //构造整个邮件的架构    msg.setContent(msgMultipart);    MimeBodyPart attch1 = new MimeBodyPart();  //邮件的附件    MimeBodyPart attch2 = new MimeBodyPart();  //邮件的附件    MimeBodyPart content = new MimeBodyPart(); //邮件的正文

****//注意在这里必须设置每一个MimeBodyPart 类对象的context，不然就会报no mimebodypart content****

attch1.setContent("", "text/html;charset=UTF-8");attch2.setContent("", "text/html;charset=UTF-8");

 //将各个组成部分组合在一起 msgMultipart.addBodyPart(attch1); msgMultipart.addBodyPart(attch2); msgMultipart.addBodyPart(content); //对邮件的附件进行细节处理 DataSource ds1 = new FileDataSource(""); DataHandler dh1 = new DataHandler(ds1); attch1.setDataHandler(dh1); try {         //对附件进行设置中文名字：用MimeUtility类的encodeText（String str）方法      attch2.setFileName( MimeUtility.encodeText(""));        } catch (UnsupportedEncodingException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } DataSource ds2 = new FileDataSource(""); DataHandler dh2 = new DataHandler(ds2); attch1.setDataHandler(dh2); //DataHandler（）方法：进行数据包装//对邮件的正文部分进行处理      //MimeMultipart bodyMultipart = new MimeMultipart("multipart/related");//QQ邮箱使用下面这种方式MimeMultipart bodyMultipart = new MimeMultipart("related");

content.setContent(bodyMultipart);//注意这儿也是不可缺少

MimeBodyPart htmlBodyPart = new MimeBodyPart();//MimeBodyPart gtfBodyPart = new MimeBodyPart();//图片gtfBodyPart.setContent("哈哈哈！", "text/html;charset=UTF-8");htmlBodyPart.setContent("我只是想来测试一下。。。。。。。。。", "text/html;charset=utf-8");bodyMultipart.addBodyPart(gtfBodyPart);bodyMultipart.addBodyPart(htmlBodyPart);DataSource gtfds = new FileDataSource("1.jpg");DataHandler gtfdh = new DataHandler(gtfds);gtfBodyPart.setDataHandler(gtfdh);msg.saveChanges();//transport用于发送Transport transport = session.getTransport();//建立连接，QQ邮箱服务器地址smtp.qq.com，端口号：465，//你的账户[e-mail]，//注意ntulsxbdknfkbjej为授权码，并不是密码transport.connect("smtp.qq.com",465, "[e-mail]", "ntulsxbdknfkbjej");//设置接受方邮件的地址transport.sendMessage(msg, new Address[]{new InternetAddress("[e-mail]")});        transport.close();//最后记得关闭连接    } catch (MessagingException e) {        // TODO Auto-generated catch block        e.printStackTrace();    }}