练习javamail写了一个发送邮件的程序，邮件标题采取以下设置可以正确显示中文：
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sun.misc.BASE64Encoder enc = new sun.misc.BASE64Encoder(); msg.setSubject( "=?GB2312?B? "+enc.encode(subject.getBytes())+ "?= ");
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但是正文部分采取以下代码却显示中文为乱码：
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msg.setText( "中文测试 ", "GB2312 ");
msg.setHeader( "Content-Transfer-Encoding ", "Base64 ");
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奇怪的是信头似乎是正确的：
Received: from zju-mchen (unknown [222.205.83.8])by smtp14 (Coremail) with SMTP id wKjRD7D7ogbEf3ZG26ztAQ==.44476S2;
Mon, 18 Jun 2007 20:51:19 +0800 (CST)
From: jerryshao1983@163.com
To: enzymer@163.com
Message-ID: <9031454.11182225057828.JavaMail.jerryshao@zju-mchen>
Subject: =?GB2312?B?QklPT08gwLTQxQ==?=
MIME-Version: 1.0
Content-Type: text/plain; charset=GB2312
Content-Transfer-Encoding: Base64
X-Coremail-Antispam: 1U3Yxn0WfASr-VFAUDIcSsGvfJTRUUUjkAFxVCF77xC6IxKo4
kEV4ylIxAIcVC2z280aVAFwI0_Gr0_Cr1lw4CEc2x0rVAKj4xxM4xvF2IEb7IF0Fy264kE
64k0F24lnxkEFVAIw20F6cxK64vIFxWl6VACY4xI67k04243AwC2zVAF1VAY17CE14v26r
1j6r15Mx02cVAKzwACY4xI67k04243AVC20s07MIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_
Gr1UMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4l4x8a6c8ajcxJMcIj6xIIjxv20xvE14v26r
1Y6r17MIIF0xvE2Ix0cI8IcVCY1x0267AKxVWUJVW8JwAv7VC2z280aVAFwI0_Jr0_Gr1l
1I0EscIYIxCEI4klw4CSwwCY02Avz4vE14v_Xr1lc2IjII80xcxEwVAKI48JM7AC8VAFwI
0_Jr0_Gr1lb4IE77IF4wAFIxvE14AKwVWUJVWUGwAqx4xG64xvF2IEw4CE5I8CrVC2j2Wl
c7Ca8VAvwVA2a4k0FcxrM7k0a2IF6F4Un29KB7ZKAUJUUUUUnxnvy29KBjDU0xZFpf9x07
brxhLUUUUU129KBjDU=
Date: Mon, 18 Jun 2007 20:51:21 +0800 (CST)
dGVzdCA/Pw==
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测试过，英文邮件完全可以正常显示，想来想去似乎应该是编码问题，但是……百思不得其解
谢谢大家帮忙。
------解决方案--------------------
msg.setText(content, encoding);
msg.setHeader( "Content-Type ", "text/plain; charset= " + encoding);
msg.setHeader( "Content-Transfer-Encoding ", "Base64 ");
用到这样的case也是有可能的。
其实mail的编码非常复杂。
lz可以尝试用utf8，看看如何。
------解决方案--------------------
用 "8859_1 "