用javamail发送带附件的邮件

 

MailUtils代码

public class MailUtils {
//  定义发件人、收件人、SMTP服务器、用户名、密码、主题、内容等
    private String displayName;
    private String to;
    private String cc;
    private String from;
    private String smtpServer;
    private String username;
    private String password;
    private String subject;
    private String content;
    private boolean isAuth = false; //服务器是否要身份认证
    private File filename;
    private List<File> files = new ArrayList<File>(); //用于保存发送附件的文件名的集合
    /**
     * 设置SMTP服务器地址
     */
    public void setSmtpServer(String smtpServer){
        this.smtpServer=smtpServer;
    }
    /**
     * 设置发件人的地址
     */
    public void setFrom(String from){
        this.from=from;
    }
    /**
     * 设置抄送人的地址
     */
    public void setCc(String cc) {
        this.cc = cc;
    }
    /**
     * 设置显示的名称
     */
    public void setDisplayName(String displayName){
        this.displayName=displayName;
    }
    /**
     * 设置服务器是否需要身份认证
     */
    public void setAuth(boolean isAuth){
        this.isAuth=isAuth;
    }
    /**
     * 设置E-mail用户名
     */
    public void setUserName(String username){
        this.username=username;
    }
    /**
     * 设置E-mail密码
     */
    public void setPassword(String password){
        this.password=password;
    }
    /**
     * 设置接收者
     */
    public void setTo(String to){
        this.to=to;
    }
    /**
     * 设置主题
     */
    public void setSubject(String subject){
        this.subject=subject;
    }
    /**
     * 设置主体内容
     */
    public void setContent(String content){
        this.content=content;
    }
    /**
     * 该方法用于收集附件名
     */
    public void addAttachfile(File fname){
        files.add(fname);
    }

    /**
     * 发送邮件
     */
    public HashMap send(){
        HashMap map=new HashMap();
        map.put("success", "true");
        String message="邮件发送成功！";
        Session session=null;
        Properties props = System.getProperties();
        props.put("mail.smtp.host", smtpServer);
        if(isAuth){ //服务器需要身份认证
            props.put("mail.smtp.auth","true");
            MailAuthenticator mailAuth=new MailAuthenticator(username,password);
            session=Session.getDefaultInstance(props, mailAuth);
        }else{
            props.put("mail.smtp.auth","false");
            session=Session.getDefaultInstance(props, null);
        }
//        session.setDebug(true);
        Transport trans = null;
        try {
            Message msg = new MimeMessage(session);
            try{
                Address from_address = new InternetAddress(from, displayName);
                msg.setFrom(from_address);
            }catch(java.io.UnsupportedEncodingException e){
                e.printStackTrace();
            }
            InternetAddress[] to_address=InternetAddress.parse(to);
            msg.setRecipients(Message.RecipientType.TO,to_address);
            InternetAddress[] cc_address=InternetAddress.parse(cc);
            msg.setRecipients(Message.RecipientType.CC,cc_address);
            msg.setSubject(subject);
            Multipart mp = new MimeMultipart();
            MimeBodyPart mbp = new MimeBodyPart();
            mbp.setContent(content.toString(), "text/html;charset=gb2312");
            mp.addBodyPart(mbp);
            if(!files.isEmpty()){//有附件
                for(int i=0;i<files.size();i++){
                    mbp=new MimeBodyPart();
                    filename=files.get(i); //选择出每一个附件名
                    FileDataSource fds=new FileDataSource(filename); //得到数据源
                    mbp.setDataHandler(new DataHandler(fds)); //得到附件本身并至入BodyPart
                    mbp.setFileName(fds.getName());  //得到文件名同样至入BodyPart
                    mp.addBodyPart(mbp);
                }
            }
            msg.setContent(mp); //Multipart加入到信件
            msg.setSentDate(new Date());     //设置信件头的发送日期
            //发送信件
            msg.saveChanges();
            trans = session.getTransport("smtp");
            trans.connect(smtpServer, username, password);
            trans.sendMessage(msg, msg.getAllRecipients());
            trans.close();

        }catch(AuthenticationFailedException e){
             map.put("success", "false");
             message="邮件发送失败！错误原因：\n"+"身份验证错误!";
             e.printStackTrace();
        }catch (MessagingException e) {
             message="邮件发送失败！错误原因：\n"+e.getMessage();
             map.put("success", "false");
             e.printStackTrace();
             Exception ex = null;
             if ((ex = e.getNextException()) != null) {
                 System.out.println(ex.toString());
                 ex.printStackTrace();
             }
        }
        //System.out.println("\n提示信息:"+message);
        map.put("message", message);
        return map;
    }
}

MailAuthenticator 代码

public class MailAuthenticator extends Authenticator
{
     private String username,password;

        public MailAuthenticator(String username,String password){
            this.username = username;
            this.password = password;
        }
        protected javax.mail.PasswordAuthentication getPasswordAuthentication() {
            return new javax.mail.PasswordAuthentication(username,password);
        }
}

FileFilter 代码

public class FileFilter implements FilenameFilter {

    String prefix,ext;
    public FileFilter(String prefix,String ext) {
        this.prefix=prefix;
        this.ext=ext;
    }
    public boolean accept(File dir, String name) {
        return name.startsWith(prefix) && name.endsWith(ext);
    }
}

MailTest代码

public class MailTest {

    static Logger logger = Logger.getLogger(MailTest.class);
    /**
     * @param args
     */
    public static void main(String[] args) {
        Properties props= new Properties();
        Properties logProps= new Properties();
        String configFile ="mailConfig.properties";
        String logFile ="log4j-mail.properties";
        try {
        InputStream is = MailTest.class.getResourceAsStream(configFile);
        InputStream isLog = MailTest.class.getResourceAsStream(logFile);
        props.load(is);
        logProps.load(isLog);
        PropertyConfigurator.configure (logProps);
        if(is!=null) is.close();
        if(isLog!=null) isLog.close();
        }
        catch(Exception e) {
            System.out.println(e+"file "+configFile+" or "+logFile+" not found");
            logger.info(e+"file "+configFile+" or "+logFile+" not found");
        }
        String displayName=StringUtils.defaultString(props.getProperty("displayName")).trim();
        String to=StringUtils.defaultString(props.getProperty("to")).trim();
        String cc=StringUtils.defaultString(props.getProperty("cc")).trim();
        String from=StringUtils.defaultString(props.getProperty("from")).trim();
        String smtpServer=StringUtils.defaultString(props.getProperty("smtpServer")).trim();
        String username=StringUtils.defaultString(props.getProperty("username")).trim();
        String password=StringUtils.defaultString(props.getProperty("password")).trim();
        String subject=StringUtils.defaultString(props.getProperty("subject")).trim();
        String content=StringUtils.defaultString(props.getProperty("content")).trim();
        String isAuth=StringUtils.defaultString(props.getProperty("isAuth")).trim();
        String filePath =StringUtils.defaultString(props.getProperty("filePath")).trim();
        String filePrefix =StringUtils.defaultString(props.getProperty("filePrefix")).trim();
        String fileExt =StringUtils.defaultString(props.getProperty("fileExt")).trim();
        MailUtils mail = new MailUtils();

        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMdd");
        Date today = new Date();
        String todayStr = dateFormat.format(today);
        File path = new File(filePath);
        if (!path.isDirectory()) {
            System.out.println("filePath "+filePath+"目录错误");
            logger.info("filePath "+filePath+"目录错误");
            return;
        }
        else if (path.isDirectory()) {
            FilenameFilter filter = new FileFilter(todayStr+filePrefix,fileExt);
            File[] files = path.listFiles(filter);
            if(files.length==0){
                System.out.println("attachment "+todayStr+filePrefix+"*."+fileExt+" is not exist");
                logger.info("attachment "+todayStr+filePrefix+"*."+fileExt+" is not exist");
                return;
            }
            for (int i = 0; i < files.length; i++) {
              if (files[i].exists() && files[i].isFile()) {
                  System.out.println("attachmentpath=" + files[i].getAbsolutePath());
                  logger.info("attachmentpath=" + files[i].getAbsolutePath());
                  mail.addAttachfile(files[i]);
              }
              else{
                  System.out.println("attachment "+todayStr+filePrefix+"*."+fileExt+" is not exist or file");
                  logger.info("attachment "+todayStr+filePrefix+"*."+fileExt+" is not exist or file");
                  return;
              }
            }
        }


        if("true".equalsIgnoreCase(isAuth)){
            mail.setAuth(true);
            mail.setUserName(username);
            mail.setPassword(password);
        }
        mail.setSmtpServer(smtpServer);
        mail.setFrom(from);
        mail.setTo(to);
        mail.setCc(cc);
        mail.setDisplayName(displayName);
        mail.setSubject(subject);
        mail.setContent(content);

        Map map = mail.send();
        if("false".equals(map.get("success"))){
            System.out.println(map.get("message"));
            logger.info(map.get("message"));
        }else{
            System.out.println("mail send success");
            logger.info("mail send success");
        }

    }

}

log4j代码

log4j.rootLogger=INFO,A1

log4j.appender.A1=org.apache.log4j.RollingFileAppender
log4j.appender.A1.File=d:/McdReportMail/log/log-McdReport.log
log4j.appender.A1.MaxFileSize=2048KB
log4j.appender.A1.MaxBackupIndex=10
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss} [%c][%L][%p] %m%n