怎么实现多个邮件收件人(注意,下边)

我的意思不是给多个人发送件,这个比较好实现。比如我如果给A和B同时发邮件,A打开邮件在邮件头处的收件人可以看到A,B。同理B也一样。这个要怎么做呀?实在没分了,会的帮帮吧!

5个回答

package com.byd.core;

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 Kou Hongtao
    */
    public class Email {

    /**

    • 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;

    private List alternativeList;

    private String mixedBoundary;

    private String mixedBoundaryNextPart;

    /**

    • 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;

    private static enum TextType {
    PLAIN("plain"), HTML("html");

    private String v;
    
    private TextType(String v) {
        this.v = v;
    }
    
    public String getValue() {
        return this.v;
    }
    

    }

    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 Kou Hongtao */ private class MailPart extends Email { public MailPart() { } }

    /**

    • 默认构造函数 */ public Email() { defaultAttachmentContentType = "application/octet-stream"; simpleDatePattern = "yyyy-MM-dd HH:mm:ss"; boundary = "--=_NextPart_zlz_3907_" + System.currentTimeMillis(); boundaryNextPart = "--" + boundary; contentTransferEncoding = "base64"; contentType = "multipart/mixed"; charset = Charset.defaultCharset().name(); partSet = new ArrayList(); alternativeList = new ArrayList(); to = new ArrayList(); cc = new ArrayList(); bcc = new ArrayList(); mixedBoundary = "=NextAttachment_zlz_" + System.currentTimeMillis(); mixedBoundaryNextPart = "--" + mixedBoundary; }

    /**

    • 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() {

      StringBuilder sbd = new StringBuilder(LINE_END);
      sbd.append(mixedBoundaryNextPart);
      sbd.append(LINE_END);
      sbd.append("Content-Type: ");
      sbd.append("multipart/alternative");
      sbd.append(";");
      sbd.append("boundary=\"");
      sbd.append(boundary).append("\""); // 邮件类型设置
      sbd.append(LINE_END);
      sbd.append(LINE_END);
      sbd.append(LINE_END);
      addPartsToString(alternativeList, sbd, getBoundaryNextPart());
      sbd.append(getBoundaryNextPart()).append("--");
      sbd.append(LINE_END);

      addPartsToString(partSet, sbd, mixedBoundaryNextPart);

      sbd.append(LINE_END);
      sbd.append(mixedBoundaryNextPart).append("--");
      sbd.append(LINE_END);
      // sbd.append(boundaryNextPart).
      // append(LINE_END);
      alternativeList.clear();
      partSet.clear();
      return sbd.toString();
      }

    private void addPartsToString(List list, StringBuilder sbd,
    String nextPartString) {
    int partCount = list.size();
    for (int i = 0; i < partCount; i++) {
    Email attachment = list.get(i);
    String attachmentContent = attachment.getContent();
    if (null != attachmentContent && 0 < attachmentContent.length()) {
    sbd.append(nextPartString).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);
    String cd = attachment.getContentDisposition();
    if (null != cd) {
    sbd.append("Content-Disposition: ");
    sbd.append(cd);
    sbd.append(LINE_END);
    }

            sbd.append(LINE_END);
            sbd.append(attachmentContent);
            sbd.append(LINE_END);
        }
    }
    

    }

    /**

    • 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 + "\""); alternativeList.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;
    }

    /**

    • 添加超文本内容
    • @param text */ public void addHtmlContent(String text) { addContent(text, TextType.HTML); }

    /**

    • 添加纯文本内容
    • @param text */ public void addTextContent(String text) { addContent(text, TextType.PLAIN); }

    private void addContent(String text, TextType type) {
    if (null != text) {
    MailPart part = new MailPart();
    part.setContent(toBase64(text));
    part.setContentType("text/" + type.getValue() + ";charset=\""
    + charset + "\"");
    alternativeList.add(part);
    }
    }

    /**

    • 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<String> 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(mixedBoundary).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());
      
      // System.out.println(
      // "///////////\n" +
      // sbf.toString() +
      // "///////////////\n");
      
      // 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;
    }

    /**

    • @param content
    • @deprecated 请参见 {@link #addTextContent(String)} 和
    • {@link #addHtmlContent(String)} */ 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
          Email mail = new Email();
          mail.setHost("smtp.byd.com"); // 邮件服务器地址
          mail.setFrom("kou.hongtao@byd.com"); // 发件人邮箱
          mail.addTo("zhang.peng24@byd.com"); // 收件人邮箱
          mail.addCc("zhao.xiaowei@byd.com");
          mail.addBcc("");
          mail.setSubject("研发物料邮件发送测试"); // 邮件主题
          mail.setUser("kou.hongtao"); // 用户名
          mail.setPassword("byd@user"); // 密码
      
          // 邮件正文
          mail.addHtmlContent("<h3>研发物料邮件测试,请不要回复!</h3>");
      
         // mail.addAttachment("add.js"); // 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();

    }
    }

public static boolean sendEMail(final Mail mail){
new Thread(){
public void run() {
System.out.println("SENDER-" + this.getId() + ":/>"
+ "开始发送邮件...");
// 创建邮件对象
Email email = new Email();
email.setHost("smtp.byd.com"); // 邮件服务器地址
email.setFrom(mail.getSendName()); // 发件人邮箱
System.out.println(mail.getSendName());
email.addTo(mail.getFoldName()); // 收件人邮箱
System.out.println(mail.getFoldName());
email.addCc(mail.getCC());//抄送
System.out.println(mail.getCC());
email.addBcc("");
email.setSubject(mail.getSubject()); // 邮件主题
System.out.println(mail.getSubject());
@SuppressWarnings("unused")
StringBuffer bf= new StringBuffer();
String strArr[] = mail.getSendName().split("@");
StringBuffer sb = new StringBuffer();
for (int i = 0; i < strArr.length; i++) {
sb.append(strArr[i]);
/*这里设置strArr.length-2避免截取后最后又出现@*/
if (i != strArr.length-2) {
sb.append("@");
}
i++;
}
System.out.println(sb.toString());
email.setUser(sb.toString());
//email.setUser("kou.hongtao"); // 用户名
email.setPassword("byd@user"); // 密码

            // 邮件正文
            email.addHtmlContent(mail.getContent());

            //mail.addAttachment("add.js"); // 添加附件

            System.out.println(email.send()); // 发送

            System.out.println("SENDER-" + this.getId() + ":/>"
                    + "邮件已发送完毕!");
        }
    }.start();
    return true;
}

你可以选择抄送 也可以 在多个收件人 写多个收件人邮箱

这就是完整代码

额 你这样相当于 吧收件人 每个人的邮件地址 遍历出来 一个一个发 不是群发

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