我正在尝试显示从服务器获取的电子邮件。在让您了解我的问题之前,请先查看我的代码:
public FileMailExtended getSingleMessage(Integer fileMailId) throws MailSystemException, IOException,
MessagingException, BOServiceException {
FileMail email = retrieve(fileMailId.intValue());
MailerScopeDef scope = email.getType();
boolean outbound = email.getDirection() == EmailConstants.DIRECTION_SENT;
Long uId = Long.valueOf(email.getUId());
String folder = null;
if (outbound) {
folder = ConfigurationService.getSentFolder(scope);
} else {
folder = ConfigurationService.getReadFolder(scope);
}
FileMailConfig fileMailConfig = getFileMailConfig(folder);
long uidValidity = 0;
if (fileMailConfig != null) {
uidValidity = fileMailConfig.getVersionId();
}
ImapFolderManager ifm;
if (outbound) {
ifm = ((ImapSender) ConfigurationService.getMailSender(scope)).getImapFolderMger();
} else {
ifm = ConfigurationService.getImapFolderManagerReader(scope);
}
FileMailExtended emailExtended = new FileMailExtended();
mapFileMailToFileMailExtended(email, emailExtended);
try {
IMAPMessage message = (IMAPMessage) ifm.getMessage(uId, uidValidity);
if (message == null) {
LOGGER.error("Could not read message with uId:" + uId + " from the server.");
return null;
}
InternetAddress intAdress = (InternetAddress) message.getSender();
String unicodeString = intAdress.toUnicodeString().replace("\"", "");
emailExtended.setFrom(unicodeString);
emailExtended.setTo(appendAddresses(message.getRecipients(RecipientType.TO)));
emailExtended.setCc(appendAddresses(message.getRecipients(RecipientType.CC)));
emailExtended.setCci(appendAddresses(message.getRecipients(RecipientType.BCC)));
emailExtended.setSubject(message.getSubject());
String content = "";
if (message.getContent() instanceof String) {
content += (String) message.getContent();
} else if (message.getContent() instanceof Multipart) {
Multipart multipart = (Multipart) message.getContent();
StringBuffer buf = new StringBuffer();
for (int x = 0; x < multipart.getCount(); x++) {
BodyPart bodyPart = multipart.getBodyPart(x);
if (bodyPart == null || bodyPart.getContentType() == null) {
continue;
}
if (bodyPart.isMimeType(TEXT_HTML)) {
buf.append((String) bodyPart.getContent());
} else if (bodyPart.getContent() instanceof Multipart) {
Multipart multipart2 = (Multipart) bodyPart.getContent();
for (int xx = 0; xx < multipart2.getCount(); xx++) {
BodyPart bodyPart2 = multipart2.getBodyPart(xx);
if (bodyPart2 != null && bodyPart2.isMimeType("text/html") {
buf.append((String) bodyPart2.getContent());
}
}
}
}
content = buf.toString();
}
emailExtended.setContent(content);
if (message.getContent() instanceof Multipart) {
Multipart multipart = (Multipart) message.getContent();
for (int i = 0; i < multipart.getCount(); i++) {
BodyPart bodyPart = multipart.getBodyPart(i);
if (!Part.ATTACHMENT.equalsIgnoreCase(bodyPart.getDisposition())) {
// dealing with attachments only
continue;
}
emailExtended.addAttachmentNames(bodyPart.getFileName());
}
}
} finally {
closeFolderManager(ifm);
}
return emailExtended;
}
当电子邮件没有任何附件时,此代码可以正常工作。我收到了以html格式化的emailContent,因此可以毫不费力地阅读
我的问题是,一旦电子邮件包含附件文件,就不会显示任何内容
我发现这是因为内容类型,当使用简单邮件发送“text / html”时发送带附件的邮件时,“text / plain”。
所以我改变了我的条件以考虑内容类型,但显示的结果是...... uh..just原始文本。
我甚至计划使用代码bodyPart2.setHeader("Content-Type", "text/html");
将内容类型强制为“text / html”,但最终会出现异常。
有任何线索,为什么带附件的电子邮件的内容类型必须是“text / plain”?我已经用Google搜索了,但没有重要答案
我该怎么改呢?
非常感谢。
答案 0 :(得分:0)
内容是text / plain还是text / html与邮件是否附件无关。
在某些情况下,邮件将包含包含text / plain和text / html部分的multipart / alternative内容。在这种情况下,您可以选择text / html部分。 This example code in the JavaMail FAQ可能有帮助。
如果邮件只有文字/简单部分,则由您决定格式化并显示它,但您认为最好。
答案 1 :(得分:0)
我用Daniel提出的解决方案解决了,尝试一下:
public static String ConvertTextPlanToHTML(String s) {
StringBuilder builder = new StringBuilder();
boolean previousWasASpace = false;
for( char c : s.toCharArray() ) {
if( c == ' ' ) {
if( previousWasASpace ) {
builder.append(" ");
previousWasASpace = false;
continue;
}
previousWasASpace = true;
} else {
previousWasASpace = false;
}
switch(c) {
case '<': builder.append("<"); break;
case '>': builder.append(">"); break;
case '&': builder.append("&"); break;
case '"': builder.append("""); break;
case '\n': builder.append("<br>"); break;
// We need Tab support here, because we print StackTraces as HTML
case '\t': builder.append(" "); break;
default:
if( c < 128 ) {
builder.append(c);
} else {
builder.append("&#").append((int)c).append(";");
}
}
}
return builder.toString();
}