基于POP3的JAVA郵件接收程序

1、基于pop3的java郵件接收程序！（與上次的發(fā)送程序配套）收藏 有發(fā)送有接收才顯得完整一點。同樣分兩部分寫：一：pop3命令介紹（抄的）；二：實例。使用telnet命令連接服務(wù)器110端口一：pop3命令介紹telnet 119.119.119.212 110trying 119.119.119.212.connected to 119.119.119.212.正在連接服務(wù)器110端口-連接服務(wù)器110端口成功+0k winmail mail server pop3 readyuser username 輸入用戶名，username 為具體的用戶名+0k執(zhí)行命令成功pass password

2、 輸入用戶密碼，password 為具體的密碼+0k 2 messages 密碼認證通過（-err authorization failed 密幣馬認證失?。﹕tat郵箱狀態(tài)+0k 2 64152為該信箱總郵件數(shù)，6415為總字節(jié)數(shù)list列出每封郵件的字節(jié)數(shù)+0k 執(zhí)行命令成功，開始顯示，左邊為郵件的序號,右邊為該郵件的大小1 537 第1封郵件,大小為537字節(jié)2 5878 第2封郵件，大小為5878字節(jié)topi 接收第1封郵件+0k 接收成功，返回第1封郵件頭return-path: vtestl>delivered-to: test2received: (winmail serv

3、er invoked for smtp delivery); mon, 25 oct 2004 14:24:27 +0800from: testlto: test2date: mon, 25 oct 2004 14:24:27 +0800subject: test mailretrl 接收第1封郵件+0k 接收成功，返回第1封郵件全部內(nèi)容return-path: vtestl>delivered-to: test2received: (winmail server invoked for smtp delivery); mon, 25 oct 2004 14:24:27 +0800fro

4、m: testlto: test2date: mon, 25 oct 2004 14:24:27 +0800subject: test mailhi, test2this is a test mail, you don't reply it.delel 刪除第1封郵件+ok刪除成功dele 2 刪除第2封郵件+ok刪除成功quit結(jié)束會話+ok執(zhí)行命令成功二：發(fā)送郵件實例package mail;import java.io. buffered reader;import java.io.bufferedwriter;import java.iooexception;import ja

5、va.i on putstreamreader;import java.io.outputstreamwriter;import javanet.socket;import .unknownhostexception;import java.util.stringtokenizer;public class pop3client private socket socket;private boolean debug=true;public static void main(string args) throws unknownhostexception，loexception string s

6、erver=""/pop3 服務(wù)器地址string user="wasingmon"/用戶名string password=""密碼pop3client pop3client=new pop3client(server,h0);pop3clie nt.recievemail(user;password);public p0p3client(string server；!nt port) throws unknownhostexception, loexception trysocket=new socket(serverzport);

7、catch(exception e)e.printstacktrace();finallysystem.out.println(n建立連接！ ”);得到服務(wù)器返回的一行命令public string getreturn(bufferedreader in)string line=,h;trylin e=in.readli ne();訐(debug)system.out.printin(”服務(wù)器返冋狀態(tài):”+line);catch(exception e)e.printstacktrace();return line;從返冋的命令中得到第一個字段，也就是服務(wù)器的返冋狀態(tài)碼(+0k或者-err)p

8、ublic string getresult(string line)stringtokenizer st=new stringtokenizer(line,”");return st.nexttoken();發(fā)送命令private string sendserver(string str,bufferedreader in,bufferedwriter out) throws ioexception out.write(str);out.newline();out.flush();if(debug)system.out.println("已發(fā)送命令:"+str)

9、;return getreturn(in);/user命令public void user(string user,bufferedreader in,bufferedwriter out) throws ioexceptionstring result;result=getresult(getreturn(in);if(!"+okh.equals(result)throw new loexception("連接服務(wù)器失敗!”)；result=getresult(se ndservercusel+useri no ut);if(!"+okn.equals(resu

10、lt)throw new ioexception(h用戶名錯誤!“)；/pass命令public void pass(stri ng password, buffered reader in.bufferedwriter out) throws ioexceptionstring result;result=getresult(sendserverpass h+password,in,out);if(!"+ok".equals(result)throw new ioexception("密碼錯誤!")；/stat命令public int stat(buf

11、feredreader in,bufferedwriter out) throws loexceptionstring result;string line;int mailnum;lin e=sendserver(,stat,i n,o ut);stringtokenizer st二new stringtokenizer(line/ n);result=st. nexttoke n();jf(st.hasmoretokens()mailnum=lnteger.parsel nt(st ne xttok en();elsemailnum=0;if(!"+ok".equals

12、(result)throw new ioexception(h查看郵箱狀態(tài)出錯!”)；system.out.printlnf'共有郵件 ”+mailnum+”封”)；return mailnum;得到郵件詳細信息public string getmessagedetail(bufferedreader in)string message=,h,;string line;trylin e=in.readli ne();while(!,.,.equalslgnorecase(line)message=message+li ne+"n"line二in .readli ne

13、();catch(exception e)e.printstacktrace();return message;/retr命令public void retr(int majlnum,bufferedreader in,bufferedwriter out) throws loexceptionstring result;for(int i=l;i<=mailnum;i+)result=getresult(se ndserverc'retl'+inout);if(!"+ok,.equals(result)throw new ioexception("接

14、收郵件出錯!”);system.out.println(n 第”+i+”封”)；system.out.pri ntln (getmessagedetail(in);退出public void quit(bufferedreader in,bufferedwriter out) throws loexceptionstring result;result=getresult(sendserver(hquit,jn,out);if(!"+ok,.equals(result)throw new ioexception("未能止確退出”)；接收郵件程序public boolean recievemail(string user,string password)!trybufferedreader in二new bufferedreader(new inputstreamreader(socket.getlnputstream();bufferedwriterout 二 newbufferedwriter(