javamail收邮件

import java.io.*;    
import java.text.*;    
import java.util.*;    
import javax.mail.*;    
import javax.mail.internet.*;    
public class ReciveOneMail {
	   private MimeMessage mimeMessage = null;    
	    private String saveAttachPath = ""; //附件下载后的存放目录    
	    private StringBuffer bodytext = new StringBuffer();//存放邮件内容    
	    private String dateformat = "yy-MM-dd HH:mm"; //默认的日前显示格式    
	   
	    public ReciveOneMail(MimeMessage mimeMessage) {    
	        this.mimeMessage = mimeMessage;    
	    }    
	   
	    public void setMimeMessage(MimeMessage mimeMessage) {    
	        this.mimeMessage = mimeMessage;    
	    }    
	   
	    /**   
	     * 获得发件人的地址和姓名   
	     */   
	    public String getFrom() throws Exception {    
	        InternetAddress address[] = (InternetAddress[]) mimeMessage.getFrom();    
	        String from = address[0].getAddress();    
	        if (from == null)    
	            from = "";    
	        String personal = address[0].getPersonal();    
	        if (personal == null)    
	            personal = "";    
	        String fromaddr = personal + "<" + from + ">";    
	        return fromaddr;    
	    }    
	   
	    /**   
	     * 获得邮件的收件人，抄送，和密送的地址和姓名，根据所传递的参数的不同 "to"----收件人 "cc"---抄送人地址 "bcc"---密送人地址   
	     */   
	    public String getMailAddress(String type) throws Exception {    
	        String mailaddr = "";    
	        String addtype = type.toUpperCase();    
	        InternetAddress[] address = null;    
	        if (addtype.equals("TO") || addtype.equals("CC")|| addtype.equals("BCC")) {    
	            if (addtype.equals("TO")) {    
	                address = (InternetAddress[]) mimeMessage.getRecipients(Message.RecipientType.TO);    
	            } else if (addtype.equals("CC")) {    
	                address = (InternetAddress[]) mimeMessage.getRecipients(Message.RecipientType.CC);    
	            } else {    
	                address = (InternetAddress[]) mimeMessage.getRecipients(Message.RecipientType.BCC);    
	            }    
	            if (address != null) {    
	                for (int i = 0; i < address.length; i++) {    
	                    String email = address[i].getAddress();    
	                    if (email == null)    
	                        email = "";    
	                    else {    
	                        email = MimeUtility.decodeText(email);    
	                    }    
	                    String personal = address[i].getPersonal();    
	                    if (personal == null)    
	                        personal = "";    
	                    else {    
	                        personal = MimeUtility.decodeText(personal);    
	                    }    
	                    String compositeto = personal + "<" + email + ">";    
	                    mailaddr += "," + compositeto;    
	                }    
	                mailaddr = mailaddr.substring(1);    
	            }    
	        } else {    
	            throw new Exception("Error emailaddr type!");    
	        }    
	        return mailaddr;    
	    }    
	   
	    /**   
	     * 获得邮件主题   
	     */   
	    public String getSubject() throws MessagingException {    
	        String subject = "";    
	        try {    
	            subject = MimeUtility.decodeText(mimeMessage.getSubject());    
	            if (subject == null)    
	                subject = "";    
	        } catch (Exception exce) {}    
	        return subject;    
	    }    
	   
	    /**   
	     * 获得邮件发送日期   
	     */   
	    public String getSentDate() throws Exception {    
	        Date sentdate = mimeMessage.getSentDate();    
	        SimpleDateFormat format = new SimpleDateFormat(dateformat);    
	        return format.format(sentdate);    
	    }    
	   
	    /**   
	     * 获得邮件正文内容   
	     */   
	    public String getBodyText() {    
	        return bodytext.toString();    
	    }    
	   
	    /**   
	     * 解析邮件，把得到的邮件内容保存到一个StringBuffer对象中，解析邮件 主要是根据MimeType类型的不同执行不同的操作，一步一步的解析   
	     */   
	    public void getMailContent(Part part) throws Exception {    
	        String contenttype = part.getContentType();    
	        int nameindex = contenttype.indexOf("name");    
	        boolean conname = false;    
	        if (nameindex != -1)    
	            conname = true;    
	        System.out.println("CONTENTTYPE: " + contenttype);    
	        if (part.isMimeType("text/plain") && !conname) {    
	            bodytext.append((String) part.getContent());    
	        } else if (part.isMimeType("text/html") && !conname) {    
	            bodytext.append((String) part.getContent());    
	        } else if (part.isMimeType("multipart/*")) {    
	            Multipart multipart = (Multipart) part.getContent();    
	            int counts = multipart.getCount();    
	            for (int i = 0; i < counts; i++) {    
	                getMailContent(multipart.getBodyPart(i));    
	            }    
	        } else if (part.isMimeType("message/rfc822")) {    
	            getMailContent((Part) part.getContent());    
	        } else {}    
	    }    
	   
	    /**    
	     * 判断此邮件是否需要回执，如果需要回执返回"true",否则返回"false"   
	     */    
	    public boolean getReplySign() throws MessagingException {    
	        boolean replysign = false;    
	        String needreply[] = mimeMessage    
	                .getHeader("Disposition-Notification-To");    
	        if (needreply != null) {    
	            replysign = true;    
	        }    
	        return replysign;    
	    }    
	   
	    /**   
	     * 获得此邮件的Message-ID   
	     */   
	    public String getMessageId() throws MessagingException {    
	        return mimeMessage.getMessageID();    
	    }    
	   
	    /**   
	     * 【判断此邮件是否已读，如果未读返回返回false,反之返回true】   
	     */   
	    public boolean isNew() throws MessagingException {    
	        boolean isnew = false;    
	        Flags flags = ((Message) mimeMessage).getFlags();    
	        Flags.Flag[] flag = flags.getSystemFlags();    
	        System.out.println("flags's length: " + flag.length);    
	        for (int i = 0; i < flag.length; i++) {    
	            if (flag[i] == Flags.Flag.SEEN) {    
	                isnew = true;    
	                System.out.println("seen Message.......");    
	                break;    
	            }    
	        }    
	        return isnew;    
	    }    
	   
	    /**   
	     * 判断此邮件是否包含附件   
	     */   
	    public boolean isContainAttach(Part part) throws Exception {    
	        boolean attachflag = false;    
	        String contentType = part.getContentType();    
	        if (part.isMimeType("multipart/*")) {    
	            Multipart mp = (Multipart) part.getContent();    
	            for (int i = 0; i < mp.getCount(); i++) {    
	                BodyPart mpart = mp.getBodyPart(i);    
	                String disposition = mpart.getDisposition();    
	                if ((disposition != null)    
	                        && ((disposition.equals(Part.ATTACHMENT)) || (disposition    
	                                .equals(Part.INLINE))))    
	                    attachflag = true;    
	                else if (mpart.isMimeType("multipart/*")) {    
	                    attachflag = isContainAttach((Part) mpart);    
	                } else {    
	                    String contype = mpart.getContentType();    
	                    if (contype.toLowerCase().indexOf("application") != -1)    
	                        attachflag = true;    
	                    if (contype.toLowerCase().indexOf("name") != -1)    
	                        attachflag = true;    
	                }    
	            }    
	        } else if (part.isMimeType("message/rfc822")) {    
	            attachflag = isContainAttach((Part) part.getContent());    
	        }    
	        return attachflag;    
	    }    
	   
	    /**    
	     * 【保存附件】    
	     */    
	    public void saveAttachMent(Part part) throws Exception {    
	        String fileName = "";    
	        if (part.isMimeType("multipart/*")) {    
	            Multipart mp = (Multipart) part.getContent();    
	            for (int i = 0; i < mp.getCount(); i++) {    
	                BodyPart mpart = mp.getBodyPart(i);    
	                String disposition = mpart.getDisposition();    
	                if ((disposition != null)    
	                        && ((disposition.equals(Part.ATTACHMENT)) || (disposition    
	                                .equals(Part.INLINE)))) {    
	                    fileName = mpart.getFileName();    
	                    if (fileName.toLowerCase().indexOf("gb2312") != -1) {    
	                        fileName = MimeUtility.decodeText(fileName);    
	                    }    
	                    saveFile(fileName, mpart.getInputStream());    
	                } else if (mpart.isMimeType("multipart/*")) {    
	                    saveAttachMent(mpart);    
	                } else {    
	                    fileName = mpart.getFileName();    
	                    if ((fileName != null)    
	                            && (fileName.toLowerCase().indexOf("GB2312") != -1)) {    
	                        fileName = MimeUtility.decodeText(fileName);    
	                        saveFile(fileName, mpart.getInputStream());    
	                    }    
	                }    
	            }    
	        } else if (part.isMimeType("message/rfc822")) {    
	            saveAttachMent((Part) part.getContent());    
	        }    
	    }    
	   
	    /**    
	     * 【设置附件存放路径】    
	     */    
	   
	    public void setAttachPath(String attachpath) {    
	        this.saveAttachPath = attachpath;    
	    }    
	   
	    /**   
	     * 【设置日期显示格式】   
	     */   
	    public void setDateFormat(String format) throws Exception {    
	        this.dateformat = format;    
	    }    
	   
	    /**   
	     * 【获得附件存放路径】   
	     */   
	    public String getAttachPath() {    
	        return saveAttachPath;    
	    }    
	   
	    /**   
	     * 【真正的保存附件到指定目录里】   
	     */   
	    private void saveFile(String fileName, InputStream in) throws Exception {    
	        String osName = System.getProperty("os.name");    
	        String storedir = getAttachPath();    
	        String separator = "";    
	        if (osName == null)    
	            osName = "";    
	        if (osName.toLowerCase().indexOf("win") != -1) {    
	            separator = "\\";   
	            if (storedir == null || storedir.equals(""))   
	                storedir = "c:\\tmp";   
	        } else {   
	            separator = "/";   
	            storedir = "/tmp";   
	        }   
	        File storefile = new File(storedir + separator + fileName);   
	        System.out.println("storefile's path: " + storefile.toString());   
	        // for(int i=0;storefile.exists();i++){   
	        // storefile = new File(storedir+separator+fileName+i);   
	        // }   
	        BufferedOutputStream bos = null;   
	        BufferedInputStream bis = null;   
	        try {   
	            bos = new BufferedOutputStream(new FileOutputStream(storefile));   
	            bis = new BufferedInputStream(in);   
	            int c;   
	            while ((c = bis.read()) != -1) {   
	                bos.write(c);   
	                bos.flush();   
	            }   
	        } catch (Exception exception) {   
	            exception.printStackTrace();   
	            throw new Exception("文件保存失败!");   
	        } finally {   
	            bos.close();   
	            bis.close();   
	        }   
	    }   
	  
	    /**   
	     * PraseMimeMessage类测试   
	     */   
	    public static void main(String args[]) throws Exception {   
	        Properties props = System.getProperties();   
	        props.put("mail.smtp.host", "smtp.sina.cn");   
	        props.put("mail.smtp.auth", "true");   
	        Session session = Session.getDefaultInstance(props, null);   
	        URLName urln = new URLName("pop3", "pop3.sina.cn", 110, null,   
	                "[email protected]", "......");   
	        Store store = session.getStore(urln);   
	        store.connect();   
	        Folder folder = store.getFolder("INBOX");   
	        folder.open(Folder.READ_ONLY);   
	        Message message[] = folder.getMessages();   
	        System.out.println("Messages's length: " + message.length);   
	        ReciveOneMail pmm = null;   
	        for (int i = 0; i < message.length; i++) {   
	            System.out.println("======================");   
	            pmm = new ReciveOneMail((MimeMessage) message[i]);   
	            System.out.println("Message " + i + " subject: " + pmm.getSubject());   
	            System.out.println("Message " + i + " sentdate: "+ pmm.getSentDate());   
	            System.out.println("Message " + i + " replysign: "+ pmm.getReplySign());   
	            System.out.println("Message " + i + " hasRead: " + pmm.isNew());   
	            System.out.println("Message " + i + "  containAttachment: "+ pmm.isContainAttach((Part) message[i]));   
	            System.out.println("Message " + i + " form: " + pmm.getFrom());   
	            System.out.println("Message " + i + " to: "+ pmm.getMailAddress("to"));   
	            System.out.println("Message " + i + " cc: "+ pmm.getMailAddress("cc"));   
	            System.out.println("Message " + i + " bcc: "+ pmm.getMailAddress("bcc"));   
	            pmm.setDateFormat("yy年MM月dd日 HH:mm");   
	            System.out.println("Message " + i + " sentdate: "+ pmm.getSentDate());   
	            System.out.println("Message " + i + " Message-ID: "+ pmm.getMessageId());   
	            // 获得邮件内容===============   
	            pmm.getMailContent((Part) message[i]);   
	            System.out.println("Message " + i + " bodycontent: \r\n"   
	                    + pmm.getBodyText());   
	            pmm.setAttachPath("c:\\");    
	            pmm.saveAttachMent((Part) message[i]);    
	        }    
	    }    
}