JavaMail中标题乱码的问题！

Question

试一下不用GB2312（直接转成ISO8859-1）或者用GBK（有没有可能是繁体）。http://www.csdn.net/develop/read_article.asp?id=16102http://www.csdn.net/develop/read_article.asp?id=16362

Answer 1

void setSubject(String subject) throws Exception{
    sun.misc.BASE64Encoder enc = new sun.misc.BASE64Encoder();
    msg.setSubject("=?GB2312?B?"+enc.encode(subject.getBytes())+"?=");
  }用这个应该可能解决

Answer 2

public String getSubject()
            throws MessagingException
    {
        String strSubject = "",temp="";
        int pos = 0;
        String strMailSubject[] = message.getHeader("Subject");
        boolean flag = MailAccount.A;
        String  strCodingType = "";
        if(strMailSubject == null)
        {//          System.out.println("邮件头空值，返回[没有主题]");
            return subject;
        }
        else
        {//  System.out.println("原始长度 "+strMailSubject.length+" 内容  "+strMailSubject[0]);
            if(strMailSubject[0].indexOf("=?GB_2312-80?") != -1)
                strMailSubject[0] = StringUtil.replaceStr(strMailSubject[0], "=?GB_2312-80?", "=?GBK?");
            try
            {
                if(strMailSubject[0].indexOf("=?ISO-8859-1?") != -1)
                {
                    System.out.println("subject after decodeText =" + strMailSubject[0]);
                    strMailSubject[0] = new String(strMailSubject[0].getBytes("ISO-8859-1"));
                }
                else if(strMailSubject[0].indexOf("=?gb2312?") != -1)
                {
                    strMailSubject[0] = new String(strMailSubject[0].getBytes("gb2312"));
                }
                else if(strMailSubject[0].indexOf("=?GB2312?") != -1)
                {
                    strMailSubject[0] = new String(strMailSubject[0].getBytes("gb2312"));
                }
                else if(strMailSubject[0].indexOf("=?GBK?") != -1)
                {
                    strMailSubject[0] = new String(strMailSubject[0].getBytes("GBK"));
                }
                else if(strMailSubject[0].indexOf("=?big5?") != -1)
                    strMailSubject[0] = new String(strMailSubject[0].getBytes("big5"));
                else
                {//正常字符集：ISO8859_1-->gb2312；主题ISO-8859-1-->gb2312；ISO-8859-1-->GBK；
                    strMailSubject[0] = new String(strMailSubject[0].getBytes("ISO-8859-1"), "gb2312");
                }
                strMailSubject[0] = MimeUtility.decodeText(strMailSubject[0]);
            }
            catch(UnsupportedEncodingException unsupportedencodingexception)
            {
                unsupportedencodingexception.printStackTrace();
                cat.error("UnsupportedEncoding", unsupportedencodingexception);
            }        }        this.subject = strMailSubject[0];
        if(subject == null)
            subject = "";
        return subject;
    }