Receive emails from javamail

Import Java. io. *; import Java. text. *; import Java. util. *; import javax. mail. *; import javax. mail. internet. *;/*** create a recivemail object when you have an email */public class reciveonemail {private mimemessage = NULL; private string saveattachpath = ""; // The Directory for storing the downloaded attachment: Private stringbuffer bodytext = new stringbuffer (); // Private string dateformat = "YY-mm-dd hh: mm "; // The default display format is public reciveonemail (M Imemessage mimemessage) {This. mimemessage = mimemessage;} public void setmimemessage (mimemessage) {This. mimemessage = mimemessage;}/*** get the sender's address and name */Public String getfrom () throws exception {internetaddress Address [] = (internetaddress []) mimemessage. getfrom (); string from = Address [0]. getaddress (); If (from = NULL) from = ""; string personal = Address [0]. getpersonal (); If (P Ersonal = NULL) Personal = ""; string fromaddr = personal + "<" + from + ">"; return fromaddr;}/*** get the email recipient, CC, and BCC address and name, based on different parameters passed, "to" ---- recipient "cc" --- CC address "BCC" --- BCC address */Public String getmailaddress (string type) throws exception {string mailaddr = ""; string addtype = type. touppercase (); internetaddress [] address = NULL; If (addtype. equals ("to") | addtype. equals ("cc") | addtype. equals ("BCC") {If (addtype. equals ("to") {address = (internetaddress []) mimemessage. getrecipients (message. recipienttype. to);} else if (addtype. equals ("cc") {address = (internetaddress []) mimemessage. getrecipients (message. recipienttype. CC);} else {address = (internetaddress []) mimemessage. getrecipients (message. recipienttype. BCC);} If (address! = NULL) {for (INT I = 0; I <address. length; I ++) {string email = Address [I]. getaddress (); If (email = NULL) email = ""; else {email = mimeutility. decodetext (email);} string personal = Address [I]. getpersonal (); If (Personal = NULL) Personal = ""; else {personal = mimeutility. decodetext (personal);} string compositeto = personal + "<" + email + ">"; mailaddr + = "," + compositeto;} mailaddr = Mailaddr. substring (1) ;}} else {Throw new exception ("error emailaddr type! ");} Return mailaddr;}/*** get email subject */Public String getsubject () throws messagingexception {string subject =" "; try {subject = mimeutility. decodetext (mimemessage. getsubject (); If (subject = NULL) Subject = "";} catch (exception exce) {} return subject ;} /*** get email sending date */Public String getsentdate () throws exception {date sentdate = mimemessage. getsentdate (); simpledateformat format = new Simpledateformat (dateformat); Return format. format (sentdate);}/*** get email body content */Public String getbodytext () {return bodytext. tostring ();}/*** resolve the email and save the obtained email content to a stringbuffer object. The email to be parsed performs different operations based on different mimetype types, step-by-Step parsing */Public void getmailcontent (Part) throws exception {string contenttype = part. getcontenttype (); int nameindex = contenttype. indexof ("name"); Boolean conname = false; If (Nameindex! =-1) conname = true; system. Out. println ("contenttype:" + contenttype); If (part. ismimetype ("text/plain ")&&! Conname) {bodytext. append (string) part. getcontent ();} else if (part. ismimetype ("text/html ")&&! Conname) {bodytext. append (string) part. getcontent ();} else if (part. ismimetype ("multipart/*") {multipart = (multipart) part. getcontent (); int counts = multipart. getcount (); For (INT I = 0; I <counts; I ++) {getmailcontent (multipart. getbodypart (I);} else if (part. ismimetype ("message/rfc822") {getmailcontent (Part) part. getcontent ();} else {}}/*** determines whether a receipt is required for this email. If yes, "true" is returned. ", Otherwise," false "*/Public Boolean getreplysign () throws messagingexception {Boolean replysign = false; string needreply [] = mimemessage. getheader ("disposition-Notification-to"); If (needreply! = NULL) {replysign = true;} return replysign;}/*** get the message-ID */Public String getmessageid () throws messagingexception {return mimemessage. getmessageid ();}/*** [determines whether the email has been read. If the email has not been read, false is returned. Otherwise, true is returned.] */Public Boolean isnew () throws messagingexception {Boolean isnew = false; flags = (Message) mimemessage ). getflags (); flags. flag [] flag = flags. getsystemflags (); system. out. println ("Flags's length:" + flag. length); For (INT I = 0; I <flag. length; I ++) {If (flag [I] = flags. flag. seen) {isnew = true; system. out. println ("seen message ....... "); break;} return isnew;}/*** determines whether the email contains attachments */Public Boolean iscontainattach (Part) throws exception {Boolean attachflag = false; string contenttype = part. getcontenttype (); If (part. ismimetype ("multipart/*") {multipart MP = (Multipart) part. getcontent (); For (INT I = 0; I <MP. getcount (); I ++) {bodypart mpart = MP. getbodypart (I); string disposition = mpart. getdisposition (); If (Disposition! = NULL) & (disposition. equals (part. attachment) | (disposition. equals (part. inline) attachflag = true; else if (mpart. ismimetype ("multipart/*") {attachflag = iscontainattach (Part) mpart);} else {string contype = mpart. getcontenttype (); If (contype. tolowercase (). indexof ("application ")! =-1) attachflag = true; If (contype. tolowercase (). indexof ("name ")! =-1) attachflag = true ;}} else if (part. ismimetype ("message/rfc822") {attachflag = iscontainattach (Part) part. getcontent ();} return attachflag;}/*** [Save attachment] */Public void saveattachment (Part) throws exception {string filename = ""; if (part. ismimetype ("multipart/*") {multipart MP = (multipart) part. getcontent (); For (INT I = 0; I <MP. getcount (); I ++) {bodypart mpart = MP. getb Odypart (I); string disposition = mpart. getdisposition (); If (Disposition! = NULL) & (disposition. equals (part. attachment) | (disposition. equals (part. inline) {filename = mpart. getfilename (); If (filename. tolowercase (). indexof ("gb2312 ")! =-1) {filename = mimeutility. decodetext (filename);} SaveFile (filename, mpart. getinputstream ();} else if (mpart. ismimetype ("multipart/*") {saveattachment (mpart);} else {filename = mpart. getfilename (); If (filename! = NULL) & (filename. tolowercase (). indexof ("gb2312 ")! =-1) {filename = mimeutility. decodetext (filename); SaveFile (filename, mpart. getinputstream () ;}}} else if (part. ismimetype ("message/rfc822") {saveattachment (Part) part. getcontent () ;}}/*** [set the attachment storage path] */Public void setattachpath (string attachpath) {This. saveattachpath = attachpath;}/*** [set date display format] */Public void setdateformat (string format) throws exception {This. dateformat = fo Rmat;}/*** [obtain the attachment storage path] */Public String getattachpath () {return saveattachpath ;} /*** [Save the attachment to the specified directory] */private void SaveFile (string filename, inputstream in) throws exception {string osname = system. getproperty ("OS. name "); string storedir = getattachpath (); string separator =" "; if (osname = NULL) osname =" "; if (osname. tolowercase (). indexof ("win ")! =-1) {separator = "\"; if (storedir = NULL | storedir. equals ("") storedir = "C: \ tmp";} else {separator = "/"; storedir = "/tmp ";} file storefile = new file (storedir + separator + filename); system. out. println ("storefile's path:" + storefile. tostring (); // For (INT I = 0; storefile. exists (); I ++) {// storefile = new file (storedir + separator + filename + I); //} bufferedoutputstream Bos = NULL; buff Eredinputstream Bis = NULL; try {Bos = new bufferedoutputstream (New fileoutputstream (storefile); Bis = new bufferedinputstream (in); int C; while (C = bis. read ())! =-1) {Bos. write (c); Bos. flush () ;}} catch (exception) {exception. printstacktrace (); throw new exception ("An error occurred while saving the file! ");} Finally {Bos. close (); bis. close () ;}/ *** prasemimemessage class test */public static void main (string ARGs []) throws exception {properties props = system. getproperties (); props. put ("mail. SMTP. host "," smtp.163.com "); props. put ("mail. SMTP. auth "," true "); Session session = session. getdefaultinstance (props, null); urlname urln = new urlname ("POP3", "pop3.163.com", 110, null, "xiangzhengyan", "pass"); store = session. getstore (urln); store. connect (); folder = store. getfolder ("inbox"); folder. open (folder. read_only); message [] = folder. getmessages (); system. out. println ("messages's length:" + message. length); reciveonemail PMM = NULL; For (INT I = 0; I <message. length; I ++) {system. out. println ("===================="); PMM = new reciveonemail (mimemessage) message [I]); system. out. println ("message" + I + "Subject:" + PMM. getsubject (); system. out. println ("message" + I + "sentdate:" + PMM. getsentdate (); system. out. println ("message" + I + "replysign:" + PMM. getreplysign (); system. out. println ("message" + I + "hasread:" + PMM. isnew (); system. out. println ("message" + I + "containattachment:" + PMM. iscontainattach (Part) Message [I]); system. out. println ("message" + I + "form:" + PMM. getfrom (); system. out. println ("message" + I + "to:" + PMM. getmailaddress ("to"); system. out. println ("message" + I + "cc:" + PMM. getmailaddress ("cc"); system. out. println ("message" + I + "BCC:" + PMM. getmailaddress ("BCC"); PMM. setdateformat ("mm DD, YY"); system. out. println ("message" + I + "sentdate:" + PMM. getsentdate (); system. out. println ("message" + I + "message-ID:" + PMM. getmessageid (); // obtain the email content ================== PMM. getmailcontent (Part) Message [I]); system. out. println ("message" + I + "bodycontent: RN" + PMM. getbodytext (); PMM. setattachpath ("C: \"); PMM. saveattachment (Part) Message [I]) ;}}