Java 流关闭异常在';mail.pop3.filecache.enabled';是真的
我已经编写了一个基于Java的独立程序(使用JavaMail API v1.4.4)来读取POP3服务器上的电子邮件,并且还使用以下方法将属性Java 流关闭异常在';mail.pop3.filecache.enabled';是真的,java,file-io,jakarta-mail,pop3,Java,File Io,Jakarta Mail,Pop3,我已经编写了一个基于Java的独立程序(使用JavaMail API v1.4.4)来读取POP3服务器上的电子邮件,并且还使用以下方法将属性mail.POP3.filecache.enable设置为true: props.put(“mail.pop3.filecache.enable”、“true”) 对于特定电子邮件,我始终从message.getContent()方法中获得以下运行时流关闭异常: 异常stracktrace: java.lang.RuntimeException: Stre
mail.POP3.filecache.enable
设置为true:
props.put(“mail.pop3.filecache.enable”、“true”)代码>
对于特定电子邮件,我始终从message.getContent()
方法中获得以下运行时流关闭
异常:
异常stracktrace:
java.lang.RuntimeException: Stream closed
at javax.mail.util.SharedFileInputStream.newStream(SharedFileInputStream.java:507)
at com.sun.mail.pop3.POP3Message.getContentStream(POP3Message.java:242)
at javax.mail.internet.MimePartDataSource.getInputStream(MimePartDataSource.java:98)
at com.sun.mail.handlers.text_plain.getContent(text_plain.java:107)
at javax.activation.DataSourceDataContentHandler.getContent(DataHandler.java:774)
at javax.activation.DataHandler.getContent(DataHandler.java:521)
at javax.mail.internet.MimeMessage.getContent(MimeMessage.java:1419)
at ReadPop3Email.readPOP3Account(ReadPop3Email.java:290)
at ReadPop3Email.main(ReadPop3Email.java:73)
ReadPop3Email.java的第290行如下:
Object Object=message.getContent()代码>
但是,如果我将mail.pop3.filecache.enable设置为false,我看不到任何异常。但是,我们希望使用属性mail.pop3.filecache.enable
为true,因为它会将消息数据缓存在临时文件中,而不是内存中,如JavaMail文档所示
为什么启用了filecache
时会出现此异常?怎么了?非常感谢您的帮助/建议。我正在使用JDK1.6,如果这很重要的话
编辑:
虽然我无法共享/发布原始源代码,但我已将原始源代码的修改版本粘贴到下面
public class ReadPop3Email
{
public static void main(String[] args)
{
System.setProperty("mail.mime.parameters.strict", "false");
System.setProperty("mail.mime.ignoremultipartencoding", "false");
ReadPop3Email pop3Email = new ReadPop3Email();
pop3Email.readPOP3Account();
}
public static String[] getPOP3Info()
{
return new String[]{"mypop3host.net", "110", "jack@example.net", "password"};
}
public Properties getPOP3Properties()
{
Properties props = new Properties();
props.put("mail.pop3.timeout", "30000");
props.put("mail.pop3.connectiontimeout", "10000");
props.put("mail.pop3.filecache.enable", "true");
return props;
}
public void readPOP3Account()
{
String server = getPOP3Info()[0];
int port = Integer.parseInt(getPOP3Info()[1]);
String username = getPOP3Info()[2];
String password = getPOP3Info()[3];
Session session = null;
Store store = null;
Folder folder = null;
POP3Folder pf = null;
Message message = null;
Message[] messages = null;
try {
System.out.println("-------------- Started processing POP3 account: " + username + " -----------------");
session = Session.getInstance(getPOP3Properties());
System.out.println("Getting the session for accessing email.");
store = session.getStore("pop3");
store.connect(server, port, username, password);
System.out.println("Connection established with POP3 server.");
folder = store.getDefaultFolder();
folder = folder.getFolder("inbox");
System.out.println("Getting the Inbox folder.");
folder.open(Folder.READ_ONLY);
pf = (POP3Folder) folder;
System.out.println("Total messages found: " + folder.getMessageCount());
messages = folder.getMessages();
//Message no. 26 is the one having this issue
message = messages[26 - 1];
System.out.println("Message number: " + message.getMessageNumber());
System.out.println("Message UID: " + pf.getUID(message));
System.out.println("From: " + message.getFrom()[0].toString());
System.out.println("Subject: " + message.getSubject());
System.out.println("Received date: " + message.getReceivedDate());
System.out.println("Sent date: " + message.getSentDate());
System.out.println("Content Type: " + message.getContentType());
System.out.println("Disposition: " + message.getDisposition());
boolean isMultipart = (message.getContent() instanceof Multipart);
System.out.println("Message is multipart? " + isMultipart);
if (!isMultipart) {
getBodyContent(message);
}
folder.close(true);
store.close();
System.out.println("-------------- Completed processing POP3 account: " + username + " -----------------");
} catch (Exception e) {
e.printStackTrace();
}
}
private void getBodyContent(Message message)
{
try
{
System.out.println("============== BODY CONTENT STARTS HERE ==============");
Object object = message.getContent();
if (object instanceof String) {
System.out.println("STRING content follows below: \n" + (String) object);
} else if (object instanceof InputStream) {
System.out.println("INPUTSTREAM content");
InputStream is = (InputStream) object;
int c;
while ((c = is.read()) != -1) {
System.out.write(c);
}
}
System.out.println("============== BODY CONTENT ENDS HERE ==============");
} catch (Exception e) {
e.printStackTrace();
}
}
}
请记住,当文件夹关闭或JVM终止时,文件缓存将被删除。您是否可以在第290行之外再添加一点?例如,至少20行,这样我们就知道你在那里做什么了。。。(你可以分享整个方法……一点问题都没有!)@OndrejKvasnovsky:粘贴在我原始源代码的略加修改的版本上面。虽然我不能分享/发布原始源代码,但我已经粘贴在我原始源代码的略加修改的版本上面。但我认为,在这种情况下,这不是问题所在。