請問在SMTP中利用Socket發送時﹐怎樣發送附件呢﹖謝謝﹗﹗

Question

用javamail 你看看它的例子，你是台湾人么？用繁体字？？

Answer 1

to->hexiaofeng(java爱好者)　:在什么地方工作呢﹖

Answer 2

我建议你看看你所接收到的邮件的源代码。很容易就能够看出来他的语法的，
具体的话你还是得去看看rfc得东西

Answer 3

请看 rfc  文档
http://www.china-pub.com/computers/eMook/emooknew/RFC/rfc.asp

Answer 4

    DataInputStream in=new DataInputStream(socket.getInputStream());
    DataOutputStream out = new DataOutputStream (socket.getOutputStream));    out.writeBytes("HELO "+"smtp.21cn.com");
    out.writeBytes("\n");
    String resu=in.readLine() ;
    System.out.println(resu) ;    out.writeBytes("MAIL FROM:"+"[email protected]");
    out.writeBytes("\n");
    resu=in.readLine();
    System.out.println(resu) ;    out.writeBytes("RCPT TO:"+"[email protected]");
    out.writeBytes("\n");
    resu=in.readLine();
    System.out.println(resu) ;    out.writeBytes("DATA");
    out.writeBytes("\n");
    resu=in.readLine();
    System.out.println(resu) ;    out.writeBytes("Subject:"+"aa");
    out.writeBytes("\n");    out.writeBytes("From:"+"[email protected]");
    out.writeBytes("\n");    out.writeBytes("To:"+"[email protected]");
    out.writeBytes("\n");   out.writeBytes("Content-Type: text/plain"+'\n');
   out.writeBytes("Content-Transfer-encoding: 8bit" + '\n');
   out.writeBytes("\n");
 
   out.writeBytes("Content-Type: multipart/mixed;"+
                   " boundary=\"ddd\""+'\n');
   out.writeBytes("--ddd"+'\n');
   String aaa="d:\\abc.txt";
   out.writeBytes("Content-Type: text/plain;"+"name="+"\""+aaa+"\""+"");
   out.writeBytes("\n");   out.writeBytes("Content-Transfer-Encoding: quoted-printable"+"\n") ;
   out.writeBytes("Content-Disposition: attachment;"+
                       "filename="+"\""+aaa+"\""+"\n") ;   File file=new File("d:\\abc.txt");
   BufferedInputStream input=new BufferedInputStream(new FileInputStream
                                              (file));
   int result;
   while ((result=input.read())!=-1)
   {
     out.write(result)  ;
   }
   out.writeBytes("\n");
   resu=in.readLine();
   System.out.println(resu) ;   out.writeBytes("--ddd--"+'\n');
   out.writeBytes(".");
   out.writeBytes("\n");
   resu=in.readLine();
   System.out.println(resu) ;
   out.writeBytes("QUIT");
   resu=in.readLine();
   System.out.println(resu) ;
   socket.close() ;
   }catch(Exception e){
        System.out.println("closing....");
        e.printStackTrace() ;
   }
以上是我的部分程序﹐為什么我發送過去的附件信息就是不能在郵件中于附件形式顯示呢﹖謝謝﹗﹗

Answer 5

     DataInputStream in=new DataInputStream(socket.getInputStream());
     DataOutputStream out = new DataOutputStream(socket.getOutputStream());
    
        out.writeBytes("HELO "+"smtp.21cn.com");
        out.writeBytes("\n");
         String resu=in.readLine() ;
         System.out.println(resu) ;
        out.writeBytes("MAIL FROM:"+"[email protected]");
        out.writeBytes("\n");
       resu=in.readLine();
        System.out.println(resu) ;
       out.writeBytes("RCPT TO:"+"[email protected]");
       out.writeBytes("\n");
         resu=in.readLine();
         System.out.println(resu) ;
       out.writeBytes("DATA");
        out.writeBytes("\n");
      resu=in.readLine();
         System.out.println(resu) ;
        out.writeBytes("Subject:"+"aa");
        out.writeBytes("\n");
        out.writeBytes("From:"+"[email protected]");
        out.writeBytes("\n");        out.writeBytes("To:"+"[email protected]");
        out.writeBytes("\n");
     out.writeBytes("Content-Type: text/plain"+'\n');
        out.writeBytes("Content-Transfer-encoding: 8bit" + '\n');
        out.writeBytes("\n");
    out.writeBytes("Content-Type: multipart/mixed;"+
                   " boundary=\"ddd\""+'\n');
     out.writeBytes("--ddd"+'\n');
       String aaa="d:\\ypf\\dd.txt";
        out.writeBytes("Content-Type: text/plain;"+"name="+"\""+aaa+"\""+"");
        out.writeBytes("\n");
        out.writeBytes("Content-Transfer-Encoding: quoted-printable"+"\n") ;
        out.writeBytes("Content-Disposition: attachment;"+
                       "filename="+"\""+aaa+"\""+"\n") ;     File file=new File("d:\\ypf\\dd.txt");
     BufferedInputStream input=new BufferedInputStream(new FileInputStream
                                              (file));
     int result;
     while ((result=input.read())!=-1)
     {
     out.write(result)  ;
     }
    out.writeBytes("\n");
     resu=in.readLine();
         System.out.println(resu) ;
    out.writeBytes("--ddd--"+'\n');
    out.writeBytes(".");
    out.writeBytes("\n");        resu=in.readLine();
         System.out.println(resu) ;
         out.writeBytes("QUIT");
            resu=in.readLine();
         System.out.println(resu) ;
      socket.close() ;
      }catch(Exception e){
        System.out.println("closing....");
        e.printStackTrace() ;
      }
  }
}
以上是我的部分程序﹐為什么我的附件信息發過去后﹐就是不能用附件形式顯示呢﹖