java 发送邮件

package com.duoduo.test;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Scanner;

import com.duoduo.std.StdOut;

public class EmailTest {
	private String host = "10.1.243.241";
	private int port = 25;
	private String from = "sx_9981@ttc.neusoft.com";
	private String to = "sx_9982@ttc.neusoft.com";
	private String data = "test";
	private Scanner in;
	private PrintWriter out;
	private final String LINEFEED="\r\n";

	public void sendMail() {
		try {
			Socket s = new Socket(host, port);
			try {
				InputStream inStream = s.getInputStream();
				OutputStream outStream = s.getOutputStream();
				in = new Scanner(inStream);
				out = new PrintWriter(outStream, true);
				String initialID = in.nextLine();
				// 220
				StdOut.println(initialID);
			    
				String hostName = InetAddress.getLocalHost().getHostName();
				StdOut.println(hostName);
				send("HELO " + hostName);
				
				// 250
				String welcome = in.nextLine();
				StdOut.println("welcome"+welcome);
				
				send("MAIL From:<" + from + ">");
				
				// 250
				String senderOK = in.nextLine();
				StdOut.println("senderOK:"+senderOK);

				send("RCPT TO:<" + to + ">");
				// 250
				String recipientOK = in.nextLine();
			    System.out.println("recipientOK:"+recipientOK);

				send("DATA");
				// 354
				String acceptedOK = in.nextLine();
			    System.out.println("acceptedOK:"+acceptedOK);

			    StringBuffer s1=new StringBuffer("From:<"+from+">"+LINEFEED);

			    s1.append("To:<"+to+">"+LINEFEED);
			    s1.append("Subject: "+"test"+LINEFEED);
			    s1.append("Date: "+new java.util.Date().toLocaleString()+LINEFEED);
			    s1.append("Content-Type: text/plain;charset=\"GB18030\""+LINEFEED);
			    s1.append(LINEFEED);
			    s1.append(data);
			    s1.append(LINEFEED);//发送

				send(s1.toString());
				send(".");
				// 250
				String dataOK = in.nextLine();
			    System.out.println("dataOK:"+dataOK);
				send("QUIT");
				// 221
				String quitOK = in.nextLine();
				StdOut.println("quitOK:"+quitOK);
			} finally {
				s.close();
			}
		} catch (UnknownHostException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}

	}

	public void send(String msg) {
		out.print(msg.replaceAll("\n", LINEFEED));
		out.print(LINEFEED);
		out.flush();
		StdOut.print(msg.replaceAll("\n", LINEFEED));
		StdOut.print(LINEFEED);
	}

	public static void main(String args[]) {
		EmailTest email = new EmailTest();
		email.sendMail();
	}

}

stdout 换为System.out即可，from done，to和subject现在还显示在正文里