关于java：如何使用javamail将base64图像嵌入到电子邮件中

How to embed base64 image to an email using javamail

我正在尝试使用嵌入的base64图像从javamail发送电子邮件(img alt='image png'src='data:image/png；base64，ivborw0kgoaansuheuga…aelftksuqmcc')

它使用的是小图像，但是当图像更大时，图像不会显示在LotusNote中。

这里是代码的一部分

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Transport transport = mailSession.getTransport();
MimeMessage message = new MimeMessage( mailSession );
message.setSubject( subject );
message.setFrom( new InternetAddress( me) );
message.setContent( bodyWithEmbeddedBase64Image,"text/html" );
transport.connect();
transport.sendMessage( message, message.getAllRecipients() );
transport.close();`

我想用预先编码的mimebodypart来测试它，但我不知道如何使用它有人能帮我一下吗：)

好的，伙计们，我找到了我的答案，我不知道我是否做得对，但我在工作。

这里是我的代码：

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private static final Pattern imgRegExp = Pattern.compile("<img[^>]+src\\s*=\\s*['"]([^'"]+)['"][^>]*>" );
public send(email) throws Exception{

Map<String, String> inlineImage = new HashMap<String, String>();
String body = email.getBody();
final Matcher matcher = imgRegExp.matcher( body );
int i = 0;
while ( matcher.find() ) {
String src = matcher.group();
if ( body.indexOf( src ) != -1 ) {
String srcToken ="src="";
int x = src.indexOf( srcToken );
int y = src.indexOf(""", x + srcToken.length() );
String srcText = src.substring( x + srcToken.length(), y );
String cid ="image" + i;
String newSrc = src.replace( srcText,"cid:" + cid );
inlineImage.put( cid, srcText.split("," )[1] );
body = body.replace( src, newSrc );
i++;
}
}
Transport transport = mailSession.getTransport();
MimeMessage message = new MimeMessage( mailSession );
message.setSubject( email.getObjet() );
message.setSender( new InternetAddress( email.getSender() ) );
message.setFrom( new InternetAddress( email.getFrom()) );
BodyPart bp = new MimeBodyPart();
bp.setContent( body,"text/html" );
MimeMultipart mmp = new MimeMultipart();
mmp.addBodyPart( bp );
Iterator<Entry<String, String>> it = inlineImage.entrySet().iterator();
while ( it.hasNext() ) {
Entry<String, String> pairs = it.next();
PreencodedMimeBodyPart pmp = new PreencodedMimeBodyPart("base64" );
pmp.setHeader("Content-ID","<" + pairs.getKey() +">" );
pmp.setDisposition( MimeBodyPart.INLINE );
pmp.setText( pairs.getValue() );
mmp.addBodyPart( pmp );
}
message.setContent( mmp );
message.addRecipient( Message.RecipientType.TO, new InternetAddress( email.getTo() ) );
transport.connect();
transport.sendMessage( message, message.getAllRecipients() );
transport.close();
}

感谢您帮助我改进，如果需要改进的话：)