mailsendhtml.java

利用JavaMail实现的发送及接收邮件的程序

package com.digipower.automail.mailsender;

/**
 * <p>Title: </p>
 * <p>Description: TestStruts</p>
 * <p>Copyright: Copyright (c) 2004</p>
 * <p>Company: foxconn</p>
 * @author conti
 * @version 1.0
 */

import java.util.ArrayList;
import javax.mail.internet.*;
import javax.mail.*;
import javax.activation.*;
import java.util.Iterator;
import java.io.*;

public class MailSendHtml extends SendMail {
  private ArrayList arrayList1 = new ArrayList();
  private ArrayList arrayList2 = new ArrayList();

  public MailSendHtml(String smtpHost, String username, String password) {
    super(smtpHost, username, password);
    multipart = new MimeMultipart("related");
  }

  public void setMailContent(String mailContent) throws MessagingException {
    String htmlContent = getContent("<img ", mailContent);
//System.out.println(htmlContent); //1
    messageBodyPart.setContent(htmlContent, "text/html;charset=GBK");
    multipart.addBodyPart(messageBodyPart);
    //调用处理html文件中的图片方法
    processHtmlImage(mailContent);
  }

  //处理html页面上的图片方法如下：
  private void processHtmlImage(String mailContent) throws MessagingException {
    for (int i = 0; i < arrayList1.size(); i++) {
      messageBodyPart = new MimeBodyPart();
      DataSource source = new FileDataSource(this.unSendMailPath +
                                             (String) arrayList1.get(i));
      messageBodyPart.setDataHandler(new DataHandler(source));
      String contentId = "<" + (String) arrayList2.get(i) + ">";
//System.out.println(contentId);
      messageBodyPart.setHeader("Content-ID", contentId);
      //messageBodyPart.setFileName( MimeUtility.encodeText((String) arrayList1.get(i)));

      try
      {
        messageBodyPart.setFileName(MimeUtility.encodeText((String)arrayList1.get(i)));
      }
      catch(Exception e)
      {

      }

      multipart.addBodyPart(messageBodyPart);
    }
  }

  //处理要发送的html文件，主要是针对html文件中的图片
  private String getContent(String searchString, String mailContent) {
    String afterReplaceStr = "";
    String content = mailContent;
    String sub = "";
    String end = "";
    String rpstring = "";
    int k = 0;
    int n = 0;
    int m = 0;
    for (int i = 0; i < mailContent.length(); i++) {
      i = content.indexOf(searchString);
      if (i != -1) {
        content = content.substring(i);
        n = content.indexOf(">");
        sub = content.substring(1, n);
        k = sub.indexOf("src=\"");
        if (k == -1) {
          k = sub.indexOf("src=") + 4;
          end = " ";
        }
        else {
          end = "\"";
          k = k + 5;
        }
        m = sub.indexOf(end, k);
//System.out.println(m);
        rpstring = sub.substring(k, m);
        if (rpstring.startsWith("http")) {
          System.out.println("不需要处理：" + rpstring);
        }
        else {
          arrayList1.add(rpstring);
        }
        content = content.substring(m+1);
      }else{
        i =mailContent.length();
      }
    }
    afterReplaceStr = mailContent;

    //在html文件中用"cid:"+Content-ID来替换原来的图片链接
    for (int c = 0; c < arrayList1.size(); c++) {
      arrayList2.add(createRandomStr());
      String addString = "cid:" + (String) arrayList2.get(c);
      mailContent=mailContent.replaceFirst((String) arrayList1.get(c),
                                               addString);
      afterReplaceStr = mailContent;

    }
    return afterReplaceStr;
  }

  //产生一个随机字符串，为了给图片设定Content-ID值
  private String createRandomStr() {
    char[] randomChar = new char[8];
    for (int i = 0; i < 8; i++) {
      randomChar[i] = (char) (Math.random() * 26 + 'a');
    }
    String replaceStr = new String(randomChar);
    return replaceStr;
  }

  /**
   * 从HTML文件中得到邮件内容
   * @param htmlFilePath String
   * @return String
   */
  public String getHtmlFromFile(String htmlFilePath) {
    StringBuffer htmlBuffer = new StringBuffer();
    try {
      File htmlFile = new File(htmlFilePath);
      FileReader fr = new FileReader(htmlFile);
      BufferedReader in = new BufferedReader(fr);
      String inLine;
      while ( (inLine = in.readLine()) != null) {
        htmlBuffer.append(inLine);
      }
    }
    catch (IOException e) {
      System.out.println(e.getMessage());
    }
    return htmlBuffer.toString();
  }
}