发送邮件及邮件附件java代码实例(支持多附件_群发送)

loverqiao 贡献于2013-08-23

作者 Administrator  创建于2010-06-22 02:16:00   修改者微软用户  修改于2010-09-28 03:26:00字数13496

文档摘要:发送邮件及邮件附件java代码实例(支持多附件_群发送)
关键词:

 以下为Mail.java的全部代码: package com.zlz3907.mail; import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.PrintWriter; import java.io.UnsupportedEncodingException; import java.net.Socket; import java.nio.charset.Charset; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; import java.util.HashMap; import java.util.List; import java.util.Map; import sun.misc.BASE64Encoder; /** * 该类使用Socket连接到邮件服务器, * 并实现了向指定邮箱发送邮件及附件的功能。 * * @author Zhong Lizhi */ public class Mail { /** * 换行符 */ private static final String LINE_END = "\r\n"; /** * 值为“true”输出高度信息(包括服务器响应信息),值为“ * false”则不输出调试信息。 */ private boolean isDebug = true; /** * 值为“true”则在发送邮件{@link Mail#send()} * 过程中会读取服务器端返回的消息, * 并在邮件发送完毕后将这些消息返回给用户。 */ private boolean isAllowReadSocketInfo = true; /** * 邮件服务器地址 */ private String host; /** * 发件人邮箱地址 */ private String from; /** * 收件人邮箱地址 */ private List to; /** * 抄送地址 */ private List cc; /** * 暗送地址 */ private List bcc; /** * 邮件主题 */ private String subject; /** * 用户名 */ private String user; /** * 密码 */ private String password; /** * MIME邮件类型 */ private String contentType; /** * 用来绑定多个邮件单元{@link #partSet} * 的分隔标识,我们可以将邮件的正文及每一个附件都看作是一个邮件单元 * 。 */ private String boundary; /** * 邮件单元分隔标识符,该属性将用来在邮件中作为分割各个邮件单元的标识 * 。 */ private String boundaryNextPart; /** * 传输邮件所采用的编码 */ private String contentTransferEncoding; /** * 设置邮件正文所用的字符集 */ private String charset; /** * 内容描述 */ private String contentDisposition; /** * 邮件正文 */ private String content; /** * 发送邮件日期的显示格式 */ private String simpleDatePattern; /** * 附件的默认MIME类型 */ private String defaultAttachmentContentType; /** * 邮件单元的集合,用来存放正文单元和所有的附件单元。 */ private List partSet; /** * 不同类型文件对应的{@link MIME} 类型映射。在添加附件 * {@link #addAttachment(String)} * 时,程序会在这个映射中查找对应文件的 {@link MIME} * 类型,如果没有, 则使用 * {@link #defaultAttachmentContentType} * 所定义的类型。 */ private static Map contentTypeMap; static { // MIME Media Types contentTypeMap = new HashMap(); contentTypeMap.put("xls", "application/vnd.ms-excel"); contentTypeMap.put("xlsx", "application/vnd.ms-excel"); contentTypeMap.put("xlsm", "application/vnd.ms-excel"); contentTypeMap.put("xlsb", "application/vnd.ms-excel"); contentTypeMap.put("doc", "application/msword"); contentTypeMap.put("dot", "application/msword"); contentTypeMap.put("docx", "application/msword"); contentTypeMap.put("docm", "application/msword"); contentTypeMap.put("dotm", "application/msword"); } /** * 该类用来实例化一个正文单元或附件单元对象,他继承了 * {@link Mail} * ,在这里制作这个子类主要是为了区别邮件单元对象和邮件服务对象 * ,使程序易读一些。 这些邮件单元全部会放到partSet * 中,在发送邮件 {@link #send()}时, 程序会调用 * {@link #getAllParts()} * 方法将所有的单元合并成一个符合MIME格式的字符串。 * * @author Zhong Lizhi */ private class MailPart extends Mail { public MailPart() { } } /** * 默认构造函数 */ public Mail() { defaultAttachmentContentType = "application/octet-stream"; simpleDatePattern = "yyyy-MM-dd HH:mm:ss"; boundary = "--=_NextPart_zlz_3907_" + System.currentTimeMillis(); boundaryNextPart = "--" + boundary; contentTransferEncoding = "base64"; contentType = "multipart/alternative"; charset = Charset.defaultCharset().name(); partSet = new ArrayList(); to = new ArrayList(); cc = new ArrayList(); bcc = new ArrayList(); } /** * 根据指定的完整文件名在 * {@link #contentTypeMap} * 中查找其相应的MIME类型, 如果没找到,则返回 * {@link #defaultAttachmentContentType} * 所指定的默认类型。 * * @param fileName * 文件名 * @return 返回文件对应的MIME类型。 */ private String getPartContentType(String fileName) { String ret = null; if (null != fileName) { int flag = fileName.lastIndexOf("."); if (0 <= flag && flag < fileName.length() - 1) { fileName = fileName.substring(flag + 1); } ret = contentTypeMap.get(fileName); } if (null == ret) { ret = defaultAttachmentContentType; } return ret; } /** * 将给定字符串转换为base64编码的字符串 * * @param str * 需要转码的字符串 * @param charset * 原字符串的编码格式 * @return base64编码格式的字符 */ private String toBase64(String str, String charset) { if (null != str) { try { return toBase64(str.getBytes(charset)); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } } return ""; } /** * 将指定的字节数组转换为base64格式的字符串 * * @param bs * 需要转码的字节数组 * @return base64编码格式的字符 */ private String toBase64(byte[] bs) { return new BASE64Encoder().encode(bs); } /** * 将给定字符串转换为base64编码的字符串 * * @param str * 需要转码的字符串 * @return base64编码格式的字符 */ private String toBase64(String str) { return toBase64(str, Charset.defaultCharset().name()); } /** * 将所有的邮件单元按照标准的MIME格式要求合并。 * * @return 返回一个所有单元合并后的字符串。 */ private String getAllParts() { int partCount = partSet.size(); StringBuilder sbd = new StringBuilder(LINE_END); for (int i = partCount - 1; i >= 0; i--) { Mail attachment = partSet.get(i); String attachmentContent = attachment.getContent(); if (null != attachmentContent && 0 < attachmentContent.length()) { sbd.append(getBoundaryNextPart()).append(LINE_END); sbd.append("Content-Type: "); sbd.append(attachment.getContentType()); sbd.append(LINE_END); sbd.append("Content-Transfer-Encoding: "); sbd.append(attachment.getContentTransferEncoding()); sbd.append(LINE_END); if (i != partCount - 1) { sbd.append("Content-Disposition: "); sbd.append(attachment.getContentDisposition()); sbd.append(LINE_END); } sbd.append(LINE_END); sbd.append(attachment.getContent()); sbd.append(LINE_END); } } sbd.append(LINE_END); sbd.append(LINE_END); // sbd.append(boundaryNextPart). // append(LINE_END); partSet.clear(); return sbd.toString(); } /** * 添加邮件正文单元 */ private void addContent() { if (null != content) { MailPart part = new MailPart(); part.setContent(toBase64(content)); part.setContentType("text/plain;charset=\"" + charset + "\""); partSet.add(part); } } private String listToMailString(List mailAddressList) { StringBuilder sbd = new StringBuilder(); if (null != mailAddressList) { int listSize = mailAddressList.size(); for (int i = 0; i < listSize; i++) { if (0 != i) { sbd.append(";"); } sbd.append("<").append(mailAddressList.get(i)).append(">"); } } return sbd.toString(); } private List getrecipient() { List list = new ArrayList(); list.addAll(to); list.addAll(cc); list.addAll(bcc); return list; } /** * 添加一个附件单元 * * @param filePath * 文件路径 */ public void addAttachment(String filePath) { addAttachment(filePath, null); } public void addTo(String mailAddress) { this.to.add(mailAddress); } public void addCc(String mailAddress) { this.cc.add(mailAddress); } public void addBcc(String mailAddress) { this.bcc.add(mailAddress); } /** * 添加一个附件单元 * * @param filePath * 文件路径 * @param charset * 文件编码格式 */ public void addAttachment(String filePath, String charset) { if (null != filePath && filePath.length() > 0) { File file = new File(filePath); try { addAttachment(file.getName(), new FileInputStream(file), charset); } catch (FileNotFoundException e) { System.out.println("错误:" + e.getMessage()); System.exit(1); } } } /** * 添加一个附件单元 * * @param fileName * 文件名 * @param attachmentStream * 文件流 * @param charset * 文件编码格式 */ public void addAttachment(String fileName, InputStream attachmentStream, String charset) { try { byte[] bs = null; if (null != attachmentStream) { int buffSize = 1024; byte[] buff = new byte[buffSize]; byte[] temp; bs = new byte[0]; int readTotal = 0; while (-1 != (readTotal = attachmentStream.read(buff))) { temp = new byte[bs.length]; System.arraycopy(bs, 0, temp, 0, bs.length); bs = new byte[temp.length + readTotal]; System.arraycopy(temp, 0, bs, 0, temp.length); System.arraycopy(buff, 0, bs, temp.length, readTotal); } } if (null != bs) { MailPart attachmentPart = new MailPart(); charset = null != charset ? charset : Charset.defaultCharset() .name(); String contentType = getPartContentType(fileName) + ";name=\"=?" + charset + "?B?" + toBase64(fileName) + "?=\""; attachmentPart.setCharset(charset); attachmentPart.setContentType(contentType); attachmentPart.setContentDisposition("attachment;filename=\"=?" + charset + "?B?" + toBase64(fileName) + "?=\""); attachmentPart.setContent(toBase64(bs)); partSet.add(attachmentPart); } } catch (Exception e) { e.printStackTrace(); } finally { if (null != attachmentStream) { try { attachmentStream.close(); attachmentStream = null; } catch (IOException e) { e.printStackTrace(); } } Runtime.getRuntime().gc(); Runtime.getRuntime().runFinalization(); } } /** * 发送邮件 * * @return 邮件服务器反回的信息 */ public String send() { // 对象申明 // 当邮件发送完毕后,以下三个对象(Socket、 // PrintWriter, // BufferedReader)需要关闭。 Socket socket = null; PrintWriter pw = null; BufferedReader br = null; try { socket = new Socket(host, 25); pw = new PrintWriter(socket.getOutputStream()); br = new BufferedReader(new InputStreamReader(socket .getInputStream())); StringBuilder infoBuilder = new StringBuilder( "\nServer info: \n------------\n"); // 与服务器建立连接 pw.write("HELO ".concat(host).concat(LINE_END)); // 连接到邮件服务 if (!readResponse(pw, br, infoBuilder, "220")) return infoBuilder.toString(); pw.write("AUTH LOGIN".concat(LINE_END)); // 登录 if (!readResponse(pw, br, infoBuilder, "250")) return infoBuilder.toString(); pw.write(toBase64(user).concat(LINE_END)); // 输入用户名 if (!readResponse(pw, br, infoBuilder, "334")) return infoBuilder.toString(); pw.write(toBase64(password).concat(LINE_END)); // 输入密码 if (!readResponse(pw, br, infoBuilder, "334")) return infoBuilder.toString(); pw.write("MAIL FROM:<" + from + ">" + LINE_END); // 发件人邮箱地址 if (!readResponse(pw, br, infoBuilder, "235")) return infoBuilder.toString(); List recipientList = getrecipient(); // 收件邮箱地址 for (int i = 0; i < recipientList.size(); i++) { pw.write("RCPT TO:<" + recipientList.get(i) + ">" + LINE_END); if (!readResponse(pw, br, infoBuilder, "250")) return infoBuilder.toString(); } // System.out.println( // getAllSendAddress()); pw.write("DATA" + LINE_END); // 开始输入邮件 if (!readResponse(pw, br, infoBuilder, "250")) return infoBuilder.toString(); flush(pw); // 设置邮件头信息 StringBuffer sbf = new StringBuffer("From: <" + from + ">" + LINE_END); // 发件人 sbf.append("To: " + listToMailString(to) + LINE_END);// 收件人 sbf.append("Cc: " + listToMailString(cc) + LINE_END);// 收件人 sbf.append("Bcc: " + listToMailString(bcc) + LINE_END);// 收件人 sbf.append("Subject: " + subject + LINE_END);// 邮件主题 SimpleDateFormat sdf = new SimpleDateFormat(simpleDatePattern); sbf.append("Date: ").append(sdf.format(new Date())); sbf.append(LINE_END); // 发送时间 sbf.append("Content-Type: "); sbf.append(contentType); sbf.append(";"); sbf.append("boundary=\""); sbf.append(boundary).append("\""); // 邮件类型设置 sbf.append(LINE_END); sbf.append("This is a multi-part message in MIME format."); sbf.append(LINE_END); // 添加邮件正文单元 addContent(); // 合并所有单元,正文和附件。 sbf.append(getAllParts()); // 发送 sbf.append(LINE_END).append(".").append(LINE_END); pw.write(sbf.toString()); readResponse(pw, br, infoBuilder, "354"); flush(pw); // QUIT退出 pw.write("QUIT" + LINE_END); if (!readResponse(pw, br, infoBuilder, "250")) return infoBuilder.toString(); flush(pw); return infoBuilder.toString(); } catch (Exception e) { e.printStackTrace(); return "Exception:>" + e.getMessage(); } finally { // 释放资源 try { if (null != socket) socket.close(); if (null != pw) pw.close(); if (null != br) br.close(); } catch (IOException e) { e.printStackTrace(); } // this.to.clear(); // this.cc.clear(); // this.bcc.clear(); this.partSet.clear(); } } /** * 将SMTP命令发送到邮件服务器 * * @param pw * 邮件服务器输入流 */ private void flush(PrintWriter pw) { if (!isAllowReadSocketInfo) { pw.flush(); } } /** * 读取邮件服务器的响应信息 * * @param pw * 邮件服务器输入流 * @param br * 邮件服务器输出流 * @param infoBuilder * 用来存放服务器响应信息的字符串缓冲 * @param msgCode * @return * @throws IOException */ private boolean readResponse(PrintWriter pw, BufferedReader br, StringBuilder infoBuilder, String msgCode) throws IOException { if (isAllowReadSocketInfo) { pw.flush(); String message = br.readLine(); infoBuilder.append("SERVER:/>"); infoBuilder.append(message).append(LINE_END); if (null == message || 0 > message.indexOf(msgCode)) { System.out.println("ERROR: " + message); pw.write("QUIT".concat(LINE_END)); pw.flush(); return false; } if (isDebug) { System.out.println("DEBUG:/>" + msgCode + "/" + message); } } return true; } public String getBoundaryNextPart() { return boundaryNextPart; } public void setBoundaryNextPart(String boundaryNextPart) { this.boundaryNextPart = boundaryNextPart; } public String getDefaultAttachmentContentType() { return defaultAttachmentContentType; } public void setDefaultAttachmentContentType( String defaultAttachmentContentType) { this.defaultAttachmentContentType = defaultAttachmentContentType; } public String getHost() { return host; } public void setHost(String host) { this.host = host; } public String getFrom() { return from; } public void setFrom(String from) { this.from = from; } public List getTo() { return to; } public void setTo(List to) { this.to = to; } public String getSubject() { return subject; } public void setSubject(String subject) { this.subject = subject; } public String getUser() { return user; } public void setUser(String user) { this.user = user; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getContentType() { return contentType; } public void setContentType(String contentType) { this.contentType = contentType; } public String getBoundary() { return boundary; } public void setBoundary(String boundary) { this.boundary = boundary; } public String getContentTransferEncoding() { return contentTransferEncoding; } public void setContentTransferEncoding(String contentTransferEncoding) { this.contentTransferEncoding = contentTransferEncoding; } public String getCharset() { return charset; } public void setCharset(String charset) { this.charset = charset; } public String getContentDisposition() { return contentDisposition; } public void setContentDisposition(String contentDisposition) { this.contentDisposition = contentDisposition; } public String getSimpleDatePattern() { return simpleDatePattern; } public void setSimpleDatePattern(String simpleDatePattern) { this.simpleDatePattern = simpleDatePattern; } public String getContent() { return content; } public void setContent(String content) { this.content = content; } public boolean isAllowReadSocketInfo() { return isAllowReadSocketInfo; } public void setAllowReadSocketInfo(boolean isAllowReadSocketInfo) { this.isAllowReadSocketInfo = isAllowReadSocketInfo; } /** * @param args */ public static void main(String[] args) { // 应用示例:线程化发送邮件 new Thread() { @Override public void run() { System.out.println("SENDER-" + this.getId() + ":/>" + "开始发送邮件..."); // 创建邮件对象 Mail mail = new Mail(); mail.setHost("smtp.test.com"); // 邮件服务器地址 mail.setFrom("sender@m.com"); // 发件人邮箱 mail.addTo("recipient@m.com"); // 收件人邮箱 mail.addCc("test@m1.com"); mail.addBcc("test@m2.com"); mail.setSubject("CC Test Mail!!"); // 邮件主题 mail.setUser("123"); // 用户名 mail.setPassword("123"); // 密码 mail.setContent("这是一个测试,请不要回复!"); // 邮件正文 mail.addAttachment("utf8中.txt"); // 添加附件 // mail.addAttachment( // "e:/test.htm"); // // 添加附件 System.out.println(mail.send()); // 发送 System.out.println("SENDER-" + this.getId() + ":/>" + "邮件已发送完毕!"); } }.start(); } }

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