java邮件收发程序

import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import .Socket;import .SocketException;import .UnknownHostException;import java.util.StringTokenizer;public class SMTPClient {private boolean debug = true;BASE64Encoder encode = new BASE64Encoder();// 自定义BASE64Encoder工具类用于加密字符串public static void main(String[] args) throws UnknownHostException,IOException {MailMessage message = new MailMessage();message.setFrom("sainvyang@");// 发件人message.setTo("sainvyang@");// 多个收件人地址间用逗号隔开String server = "";// SMTP邮件服务器message.setSubject("JA V A MAIL测试");// 邮件主题message.setContent("你好！这里是系统发出的JA V A MAIL测试，请勿回复。

");// 邮件内容message.setDataFrom("Sender");// 发件人，在邮件的发件人栏目中显示message.setDataTo("Receiver");// 收件人，在邮件的收件人栏目中显示message.setUser("sainvyang@");// 登陆的邮箱账号message.setPassword("18657601");// 登陆邮箱的密码，建议自己保密好，公开传播会泄密SMTPClient smtp = new SMTPClient(server, 25);boolean flag;flag = smtp.sendMail(message, server);if (flag) { System.out.println("邮件发送成功！");} else { System.out.println("邮件发送失败！");}}private Socket socket;public SMTPClient(String server, int port) throws UnknownHostException,IOException {try {socket = new Socket(server, 25);} catch (SocketException e) {System.out.println(e.getMessage());} catch (Exception e) {e.printStackTrace();} finally {System.out.println("已经建立连接!");}}// 注册到邮件服务器public void helo(String server, BufferedReader in, BufferedWriter out) throws IOException {int result;result = getResult(in);// 连接上邮件服务后,服务器给出220应答if (result != 220) {throw new IOException("连接服务器失败");}result = sendServer("HELO " + server, in, out);// HELO命令成功后返回250if (result != 250) {throw new IOException("注册邮件服务器失败！");}}private int sendServer(String str, BufferedReader in, BufferedWriter out) throws IOException {out.write(str);out.newLine();out.flush();if (debug) {System.out.println("已发送命令:" + str);}return getResult(in);}public int getResult(BufferedReader in) { String line = "";try {line = in.readLine();if (debug) {System.out.println("服务器返回状态:" + line);}} catch (Exception e) {e.printStackTrace();}// 从服务器返回消息中读出状态码,将其转换成整数返回StringTokenizer st = new StringTokenizer(line, " ");return Integer.parseInt(st.nextToken());}public void authLogin(MailMessage message, BufferedReader in,BufferedWriter out) throws IOException {int result;result = sendServer("AUTH LOGIN", in, out);if (result != 334) {throw new IOException("用户验证失败！");}result = sendServer(encode.encode(message.getUser().getBytes()), in, out);if (result != 334) {throw new IOException("错误！");}result = sendServer(encode.encode(message.getPassword().getBytes()), in, out);if (result != 235) {throw new IOException("验证失败！");}}// 开始发送消息，邮件源地址public void mailFrom(String source, BufferedReader in, BufferedWriter out) throws IOException {int result;result = sendServer("MAIL FROM:<" + source + ">", in, out);if (result != 250) {throw new IOException("指定源地址错误");}}// 设置邮件收件人。

多邮件发送用","隔开public void rcpt(String touchman, BufferedReader in, BufferedWriter out) throws IOException {//String[] mailList = touchman.split(",");/*if (mailList.length > 1) {for (String touch : mailList) {connectionServer(touch,in,out);}}else */connectionServer(touchman,in,out); }private void connectionServer(String touch, BufferedReader in, BufferedWriter out)throws IOException {int result;result = sendServer("RCPT TO:<" + touch + ">", in, out); if (result != 250) { throw new IOException("指定目的地址错误！");}}// 邮件体public void data(String from, String to, String subject, String content,BufferedReader in, BufferedWriter out) throws IOException {int result;result = sendServer("DA TA", in, out);// 输入DA TA回车后,若收到354应答后,继续输入邮件内容if (result != 354) {throw new IOException("不能发送数据");}out.write("From: " + from);out.newLine();out.write("To: " + to);out.newLine();out.write("Subject: " + subject);out.newLine();out.newLine();out.write(content);out.newLine();// 句号加回车结束邮件内容输入result = sendServer(".", in, out);System.out.println(result);if (result != 250) {throw new IOException("发送数据错误");}}// 退出public void quit(BufferedReader in, BufferedWriter out) throws IOException { int result;result = sendServer("QUIT", in, out);if (result != 221) {throw new IOException("未能正确退出");}}// 发送邮件主程序public boolean sendMail(MailMessage message, String server) {try {BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));BufferedWriter out = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));helo(server, in, out);// HELO命令authLogin(message, in, out);// AUTH LOGIN命令mailFrom(message.getFrom(), in, out);// MAIL FROMrcpt(message.getTo(), in, out);// RCPTdata(message.getDataFrom(), message.getDataTo(), message.getSubject(), message.getContent(), in, out);// DA TAquit(in, out);// QUIT} catch (Exception e) {e.printStackTrace();return false;}return true;}}/*** BASE64Encoder加密类*///package mail;/*** @author Daniel Cheng**/public class BASE64Encoder {private static char[] codec_table = { 'A', 'B', 'C', 'D', 'E', 'F', 'G','H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T','U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g','h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't','u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6','7', '8', '9', '+', '/' };public BASE64Encoder() {}public String encode(byte[] a) {int totalBits = a.length * 8;int nn = totalBits % 6;int curPos = 0;// process bitsStringBuffer toReturn = new StringBuffer();while (curPos < totalBits) {int bytePos = curPos / 8;switch (curPos % 8) {case 0:toReturn.append(codec_table[(a[bytePos] & 0xfc) >> 2]);break;case 2:toReturn.append(codec_table[(a[bytePos] & 0x3f)]);break;case 4:if (bytePos == a.length - 1) {toReturn.append(codec_table[((a[bytePos] & 0x0f) << 2) & 0x3f]);} else {int pos = (((a[bytePos] & 0x0f) << 2) | ((a[bytePos + 1] & 0xc0) >> 6)) & 0x3f;toReturn.append(codec_table[pos]);}break;case 6:if (bytePos == a.length - 1) {toReturn.append(codec_table[((a[bytePos] & 0x03) << 4) & 0x3f]);} else {int pos = (((a[bytePos] & 0x03) << 4) | ((a[bytePos + 1] & 0xf0) >> 4)) & 0x3f;toReturn.append(codec_table[pos]);}break;default://never hanppenbreak;}curPos+=6;}if(nn==2){toReturn.append("==");}else if(nn==4){toReturn.append("=");}return toReturn.toString(); }}/*** 邮件实体POJO类*///package mail;/*** @author Daniel Cheng**/public class MailMessage {private String from;private String to;private String subject;private String content;private String dataFrom;private String dataTo;private String user;private String password;/****/public MailMessage() {super();// TODO Auto-generated constructor stub}/*** @param from* @param to* @param subject* @param content* @param dataFrom* @param dataTo* @param user* @param password*/public MailMessage(String from, String to, String subject, String content, String dataFrom, String dataTo, String user, String password) { super();this.from = from;this.to = to;this.subject = subject;this.content = content;this.dataFrom = dataFrom;this.dataTo = dataTo;er = user;this.password = password;}public String getFrom() {return from;}public void setFrom(String from) {this.from = from;}public String getTo() {return to;}public void setTo(String to) {this.to = to;}public String getSubject() {return subject;}public void setSubject(String subject) {this.subject = subject;}public String getContent() {return content;}public void setContent(String content) {this.content = content;}public String getDataFrom() {return dataFrom;}public void setDataFrom(String dataFrom) { this.dataFrom = dataFrom;}public String getDataTo() {return dataTo;}public void setDataTo(String dataTo) {this.dataTo = dataTo;}public String getUser() {return user;}public void setUser(String user) {er = user;}public String getPassword() {return password;}public void setPassword(String password) { this.password = password;}}。