SMTP_Example.java寄送郵件

import java.io.*;
import java.net.*;
public class SMTP_Example {
 public static void main(String args[]) {
  try {
   //用學校的stmp server送信,成功傳回220 Ready
   Socket cs = new Socket("stumail.nutn.edu.tw", 25);
   //輸出串流
   BufferedWriter outData = new BufferedWriter(
    new OutputStreamWriter(cs.getOutputStream()));
   //輸入串流
   BufferedReader inData = new BufferedReader(
    new InputStreamReader(cs.getInputStream()));
   //送出HELO,成功則傳回250 OK
   outData.write("HELO stumail.nutn.edu.tw \r\n");
   outData.flush();
   System.out.println(inData.readLine());
   //送出寄件者,成功則傳回250 OK
   outData.write("MAIL FROM:  \r\n");
   outData.flush();
   System.out.println(inData.readLine());
   //送出收件者,成功則傳回250 OK
   outData.write("RCPT TO:  \r\n");
   outData.flush();
   System.out.println(inData.readLine());
   //開始處理郵件標題和內容,若成功則會回傳354 Start mail input之訊息
   //記住需要在每行結尾加上
   outData.write("DATA \r\n");
   outData.flush();
   System.out.println(inData.readLine());
   //寄件者
   outData.write("From: s09555051@stumail.nutn.edu.tw \r\n");
   //收件者
   outData.write("To: s09555051@stumail.nutn.edu.tw \r\n");
   //郵件標題
   outData.write("Subject: STMP Mail Test By Java \r\n");
   //郵件內容
   outData.write("This is just a simple test \r\n");
   outData.write("so now...do you know how to use? \r\n");
   outData.write("中文嘛a通哦!! \");
   //結尾加上.
   outData.write("\r\n");
   outData.write("." + "\r\n");
   outData.flush();
   System.out.println(inData.readLine());
   outData.write("QUIT \r\n");
   outData.flush();
   System.out.println(inData.readLine());
   //關閉串流
   cs.close();
   outData.close();
   inData.close();
   
  }catch(UnknownHostException uhe) {
   uhe.printStackTrace();
  }catch(IOException ioe) {
   ioe.printStackTrace();
  }
 }
}