JavaMail中标题乱码的问题！

[huwin]

我用javamail中的mm.getSubject()方法得到的信件标题，再不事先标记为GB2312时，返回的中文标题会是乱码，而且使用：
String subject = new String(mm.getSubject().getBytes("ISO-8859-1"),"GB2312");转换也无效。

例如用sina.com.cn的webmail发出的邮件，请问如何解决呢？

[beming]

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=16102

http://www.csdn.net/develop/read_article.asp?id=16362

[wks9527]

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

[GJA106]

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;
}

[54sunboy]

謝謝!