怎样得到未读邮件的个数!我只要得到未读邮件的个数就行了!怎么弄!
我在javamail的demo中找到了这个程序我直接抄了下来可是运行有错!
package testThinking;
import java.util.*;
import java.io.*;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;
/*
* Demo app that exercises the Message interfaces.
* Access message given its UID.
* Show information about and contents of messages.
*
* @author John Mani
* @author Bill Shannon
*/
public class MailTest {
static String protocol= "pop3 ";
static String host = "....... ";
static String user = "test ";
static String password = "test ";
static String mbox = "INBOX ";
static String url = null;
static boolean verbose = false;
public static void main(String argv[]) {
long uid = -1;
int optind;
for (optind = 0; optind < argv.length; optind++) {
if (argv[optind].equals( "-T ")) {
protocol = argv[++optind];
} else if (argv[optind].equals( "-H ")) {
host = argv[++optind];
} else if (argv[optind].equals( "-U ")) {
user = argv[++optind];
} else if (argv[optind].equals( "-P ")) {
password = argv[++optind];
} else if (argv[optind].equals( "-v ")) {
verbose = true;
} else if (argv[optind].equals( "-f ")) {
mbox = argv[++optind];
} else if (argv[optind].equals( "-L ")) {
url = argv[++optind];
} else if (argv[optind].equals( "-- ")) {
optind++;
break;
} else if (argv[optind].startsWith( "- ")) {
System.out.println( "Usage: uidmsgshow [-L url] [-T protocol] [-H host] [-U user] [-P password] [-f mailbox] [uid] [-v] ");
System.exit(1);
} else {
break;
}
}
try {
if (optind < argv.length)
uid = Long.parseLong(argv[optind]);
// Get a Properties object
Properties props = System.getProperties();
// Get a Session object
Session session = Session.getInstance(props, null);
// session.setDebug(true);
// Get a Store object
Store store = null;
if (url != null) {
URLName urln = new URLName(url);
store = session.getStore(urln);
store.connect();
} else {
if (protocol != null)
store = session.getStore(protocol);
else
store = session.getStore();
// Connect
if (host != null || user != null || password != null)
store.connect(host, user, password);
else
store.connect();
}
// Open the Folder
Folder folder = store.getDefaultFolder();
if (folder == null) {
System.out.println( "No default folder ");
System.exit(1);
}
folder = folder.getFolder(mbox);
if (!folder.exists()) {
System.out.println(mbox + " does not exist ");
System.exit(1);
}
if (!(folder instanceof UIDFolder)) {
System.out.println(
"This Provider or this folder does not support UIDs ");
System.exit(1);
}
UIDFolder ufolder = (UIDFolder)folder;
folder.open(Folder.READ_WRITE);
int totalMessages = folder.getMessageCount();
if (totalMessages == 0) {
System.out.println( "Empty folder ");
folder.close(false);
store.close();
System.exit(1);
}
if (verbose) {
int newMessages = folder.getNewMessageCount();
System.out.println( "Total messages = " + totalMessages);
System.out.println( "New messages = " + newMessages);
System.out.println( "------------------------------- ");
}
if (uid == -1) {
// Attributes & Flags for ALL messages ..
Message[] msgs =
ufolder.getMessagesByUID(1, UIDFolder.LASTUID);
// Use a suitable FetchProfile
FetchProfile fp = new FetchProfile();
fp.add(FetchProfile.Item.ENVELOPE);
fp.add(FetchProfile.Item.FLAGS);
fp.add( "X-Mailer ");
folder.fetch(msgs, fp);
for (int i = 0; i < msgs.length; i++) {
System.out.println( "-------------------------- ");
System.out.println( "MESSAGE UID # " +
ufolder.getUID(msgs[i]) + ": ");
dumpEnvelope(msgs[i]);
// dumpPart(msgs[i]);
}
} else {
System.out.println( "Getting message UID: " + uid);
Message m = ufolder.getMessageByUID(uid);
if (m != null)
dumpPart(m);
else
System.out.println(
"This Message does not exist on this folder ");
}
folder.close(false);
store.close();
} catch (Exception ex) {
System.out.println( "Oops, got exception! " + ex.getMessage());
ex.printStackTrace();
}
System.exit(1);
}
public static void dumpPart(Part p) throws Exception {
if (p instanceof Message)
dumpEnvelope((Message)p);
/* Dump input stream
InputStream is = new BufferedInputStream(p.getInputStream());
int c;
while ((c = is.read()) != -1)
System.out.write(c);
*/
System.out.println( "CONTENT-TYPE: " + p.getContentType());
Object o = p.getContent();
if (o instanceof String) {
System.out.println( "This is a String ");
System.out.println( "--------------------------- ");
System.out.println((String)o);
} else if (o instanceof Multipart) {
System.out.println( "This is a Multipart ");
System.out.println( "--------------------------- ");
Multipart mp = (Multipart)o;
int count = mp.getCount();
for (int i = 0; i < count; i++)
dumpPart(mp.getBodyPart(i));
} else if (o instanceof Message) {
System.out.println( "This is a Nested Message ");
System.out.println( "--------------------------- ");
dumpPart((Part)o);
} else if (o instanceof InputStream) {
System.out.println( "This is just an input stream ");
System.out.println( "--------------------------- ");
InputStream is = (InputStream)o;
int c;
while ((c = is.read()) != -1)
System.out.write(c);
}
}
public static void dumpEnvelope(Message m) throws Exception {
System.out.println( "This is the message envelope ");
System.out.println( "--------------------------- ");
Address[] a;
// FROM
if ((a = m.getFrom()) != null) {
for (int j = 0; j < a.length; j++)
System.out.println( "FROM: " + a[j].toString());
}
// TO
if ((a = m.getRecipients(Message.RecipientType.TO)) != null) {
for (int j = 0; j < a.length; j++)
System.out.println( "TO: " + a[j].toString());
}
// SUBJECT
System.out.println( "SUBJECT: " + m.getSubject());
// DATE
Date d = m.getSentDate();
System.out.println( "SendDate: " +
(d != null ? d.toString() : "UNKNOWN "));
// SIZE
System.out.println( "Size: " + m.getSize());
// FLAGS:
Flags flags = m.getFlags();
StringBuffer sb = new StringBuffer();
Flags.Flag[] sf = flags.getSystemFlags(); // get the system flags
boolean first = true;
for (int i = 0; i < sf.length; i++) {
String s;
Flags.Flag f = sf[i];
if (f == Flags.Flag.ANSWERED)
s = "\\Answered ";
else if (f == Flags.Flag.DELETED)
s = "\\Deleted ";
else if (f == Flags.Flag.DRAFT)
s = "\\Draft ";
else if (f == Flags.Flag.FLAGGED)
s = "\\Flagged ";
else if (f == Flags.Flag.RECENT)
s = "\\Recent ";
else if (f == Flags.Flag.SEEN)
s = "\\Seen ";
else
continue;// skip it
if (first)
first = false;
else
sb.append( ' ');
sb.append(s);
}
String[] uf = flags.getUserFlags(); // get the user flag strings
for (int i = 0; i < uf.length; i++) {
if (first)
first = false;
else
sb.append( ' ');
sb.append(uf[i]);
}
System.out.println( "FLAGS = " + sb.toString());
// X-MAILER
String[] hdrs = m.getHeader( "X-Mailer ");
if (hdrs != null)
System.out.println( "X-Mailer: " + hdrs[0]);
else
System.out.println( "X-Mailer NOT available ");
}
}
报这个错!应该怎么解决This Provider or this folder does not support UIDs
[解决办法]
帮顶
[解决办法]
邮件在数据表中不是有个 "阅读状态 "字段吗?你只要统计该表中 "阅读状态 "为 "未读 "标识的记录数就可以了呀
[解决办法]
1、自己维护一个数据表判断。
2、用IMAP协议
