如何在英文郵件主題行中包含英鎊符號

Question

如何在通過java郵件發送的電子郵件的主題行中包含英鎊符號？

當我發送它時，它顯示不正確。

Answer 1

主題是一個頭。標題只使用ascii-7，所以要正確地編碼沒有ascii-7字符，你應該使用正確的編碼。

如果您正在使用的類允許您使用UTF-8指示某些編碼嘗試。

mimeMessage.setSubject(yourSubject, "UTF-8"); 

如果你手寫的標題使用任何的這個：

MimeUtility.encodeWord(yourSubject, "UTF-8", "B"); // base-64 
MimeUtility.encodeWord(yourSubject, "UTF-8", "Q"); // quoted-printable 

這或多或少什麼的MimeMessage確實在SETSUBJECT（STR，編碼）：

setHeader("Subject", MimeUtility.fold(9, MimeUtility.encodeText(subject, charset, null))); 
// fold splits the value in several lines with no more than 72 chars 

樣本

我試過這個：

public static void main(String[] args) throws Exception { 
      // manual encoding 
     System.out.println(MimeUtility.encodeText("How to include £ pound symbol", "UTF-8", "Q")); 
     System.out.println(MimeUtility.encodeText("How to include £ pound symbol", "UTF-8", "B")); 

      // MimeMessage encoding 
     MimeMessage m = new MimeMessage((Session) null); 
     m.setSubject("How to include £ pound symbol", "UTF-8"); 
     m.setContent("lalala", "text/plain"); 
     m.writeTo(System.out); 
    } 

輸出功率爲：

=?UTF-8?Q?How_to_include_=C2=A3_pound_symbol?= 
=?UTF-8?B?SG93IHRvIGluY2x1ZGUgwqMgcG91bmQgc3ltYm9s?= 

（...）

Message-ID: <21944831.01314352473121.JavaMail.HAC001ES@SE115179> 
Subject: =?UTF-8?Q?How_to_include_=C2=A3_pound_symbol?= 
MIME-Version: 1.0 
Content-Type: text/plain; charset=us-ascii 
Content-Transfer-Encoding: 7bit 

lalala 

反正你總是可以使用：

String yourEncodedString = MimeUtility.encodeText(str, "UTF-8", "Q"); 
mimeMessage.setHeader("Subject", yourEncodedString); 

Answer 2

設置你的編碼設置爲UTF-8 ..

msg.setContent(message,"text/html; charset=UTF-8");