JavaMail 发送邮件类详解编程语言

  
/** 
 * 邮件发送组件类 
 * 该类需要三个jar文件: mail.jar,activation.jar,htmlparser.jar 
 * @author Winter Lau (winter.lau[at]163.com) 
 * @version 1.0 
 */ 
package lius.util.mail; 
  
import java.io.File; 
import java.io.UnsupportedEncodingException; 
import java.util.ArrayList; 
import java.util.Date; 
import java.util.Properties; 
  
import javax.activation.DataHandler; 
import javax.activation.DataSource; 
import javax.activation.FileDataSource; 
import javax.mail.Authenticator; 
import javax.mail.BodyPart; 
import javax.mail.Message; 
import javax.mail.MessagingException; 
import javax.mail.Multipart; 
import javax.mail.PasswordAuthentication; 
import javax.mail.SendFailedException; 
import javax.mail.Session; 
import javax.mail.Transport; 
import javax.mail.internet.InternetAddress; 
import javax.mail.internet.MimeBodyPart; 
import javax.mail.internet.MimeMessage; 
import javax.mail.internet.MimeMultipart; 
  
import org.htmlparser.Node; 
import org.htmlparser.Parser; 
import org.htmlparser.tags.ImageTag; 
import org.htmlparser.util.ParserException; 
  
/** 
 * 邮件发送组件,具体的使用方法参照该类的main方法 
 * @author Winter Lau 
 */ 
public abstract class MailSender extends Authenticator{ 
  
    private String username = null;     //邮件发送帐号用户名 
    private String userpasswd = null;   //邮件发送帐号用户口令 
    protected BodyPart messageBodyPart = null; 
    protected Multipart multipart = new MimeMultipart(/"related/"); 
    protected MimeMessage mailMessage = null; 
    protected Session mailSession = null; 
    protected Properties mailProperties = System.getProperties(); 
    protected InternetAddress mailFromAddress = null; 
    protected InternetAddress mailToAddress = null; 
    protected Authenticator authenticator = null; 
    protected String mailSubject = /"/"; 
    protected Date mailSendDate = null; 
  
    /** 
     * 构造函数 
     * @param smtpHost 
     * @param username 
     * @param password 
     */ 
    protected MailSender(String smtpHost, String username, String password) { 
        this.username = username; 
        this.userpasswd = password; 
        mailProperties.put(/"mail.smtp.host/", smtpHost); 
        mailProperties.put(/"mail.smtp.auth/", /"true/"); //设置smtp认证，很关键的一句 
        mailSession = Session.getDefaultInstance(mailProperties, this); 
        mailMessage = new MimeMessage(mailSession); 
        messageBodyPart = new MimeBodyPart(); 
    } 
    /** 
     * 构造一个纯文本邮件发送实例 
     * @param smtpHost 
     * @param username 
     * @param password 
     * @return 
     */ 
    public static MailSender getTextMailSender(String smtpHost, String username, String password) {         
        return new MailSender(smtpHost,username,password) { 
            public void setMailContent(String mailContent) throws MessagingException { 
                messageBodyPart.setText(mailContent); 
                multipart.addBodyPart(messageBodyPart); 
            }             
        };         
    } 
    /** 
     * 构造一个超文本邮件发送实例 
     * @param smtpHost 
     * @param username 
     * @param password 
     * @return 
     */ 
    public static MailSender getHtmlMailSender(String smtpHost, String username, String password) { 
        return new MailSender(smtpHost,username,password) { 
            private ArrayList arrayList1 = new ArrayList(); 
            private ArrayList arrayList2 = new ArrayList(); 
  
            public void setMailContent(String mailContent) throws MessagingException { 
                String htmlContent = getContent(/"<img src=/", mailContent); 
                messageBodyPart.setContent(htmlContent, /"text/html;charset=GB2312/"); 
                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((String) arrayList1.get(i)); 
                    messageBodyPart.setDataHandler(new DataHandler(source)); 
                    String contentId = /"</" + (String) arrayList2.get(i) + /">/"; 
                    messageBodyPart.setHeader(/"Content-ID/", contentId); 
                    messageBodyPart.setFileName((String) arrayList1.get(i)); 
                    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) { 
                try { 
                    Parser parser = Parser.createParser(new String(mailContent.getBytes(), ISO8859_1)); 
                    Node[] images = parser.extractAllNodesThatAre(ImageTag.class); 
                    for(int i=0;i<images.length;i++) { 
                        ImageTag imgTag = (ImageTag) images[i]; 
                        if(!imgTag.getImageURL().toLowerCase().startsWith(/"http:///")) 
                            arrayList1.add(imgTag.getImageURL()); 
                    } 
                } catch (UnsupportedEncodingException e1) { 
                } catch (ParserException e) {} 
                String afterReplaceStr = mailContent; 
                //在html文件中用/"cid:/"+Content-ID来替换原来的图片链接 
                for (int m = 0; m < arrayList1.size(); m++) { 
                    arrayList2.add(createRandomStr()); 
                    String addString = /"cid:/" + (String) arrayList2.get(m); 
                    afterReplaceStr = mailContent.replaceAll( 
                            (String) arrayList1.get(m), addString); 
                } 
                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; 
            } 
  
            private final static String ISO8859_1 = /"8859_1/";   
        }; 
    } 
    /** 
     * 用于实现邮件发送用户验证 
     * @see javax.mail.Authenticator#getPasswordAuthentication 
     */ 
    protected PasswordAuthentication getPasswordAuthentication() { 
        return new PasswordAuthentication(username, userpasswd); 
    } 
      
    /** 
     * 设置邮件标题 
     * @param mailSubject 
     * @throws MessagingException 
     */ 
    public void setSubject(String mailSubject) throws MessagingException { 
        this.mailSubject = mailSubject; 
        mailMessage.setSubject(mailSubject); 
    } 
  
    /** 
     * 所有子类都需要实现的抽象方法，为了支持不同的邮件类型 
     * @param mailContent 
     * @throws MessagingException 
     */ 
    protected abstract void setMailContent(String mailContent) throws MessagingException; 
  
    /** 
     * 设置邮件