javamail 收邮件并解析附件

package com.zz.mail;  
  
import java.io.*;
import java.text.*;
import java.util.*;

import javax.mail.*;
import javax.mail.internet.*;
import java.io.File;
  
import jxl.*;
  
/**   
 * 有一封邮件就需要建立一个ReciveMail对象   
 */    
public class ReciveOneMail {     
    private MimeMessage mimeMessage = null;     
    private String saveAttachPath = "c:/"; //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("gbk") != -1) {     
                        fileName = MimeUtility.decodeText(fileName);     
                    }     
                    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.toLowerCase().indexOf("gb18030") != -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();    
        } 
        //解析EXCEL
        Workbook book = Workbook.getWorkbook(new File(storedir + separator + fileName));  
        Sheet[] sheets = book.getSheets();  
             
        Sheet sheet = sheets[0];  
        System.out.println("Sheet"+0);  
        int col = sheet.getColumns();  
        int row = sheet.getRows();  
        for(int r=3;r<row;r++){  
         //for(int c=1;c<col;c++){  
//        得到第c列第r行的单元格  
          Cell cell = sheet.getCell(1, r);  
          String result = cell.getContents();  
          System.out.print("     "+result);  
            
        // }  
        // System.out.println();  
        }  
         
        book.close();  
    }    
   
    /**   
     * PraseMimeMessage类测试   
     */    
    public static void main(String args[]) throws Exception {    
        String protocol = "pop3";
        boolean isSSL = true;
        String host = "pop.163.com";
        int port = 995;
        String username = "[email protected]";
        String password = "*****";
 
        Properties props = new Properties();
        props.put("mail.pop3.ssl.enable", isSSL);
        props.put("mail.pop3.host", host);
        props.put("mail.pop3.port", port);
 
        Session session = Session.getDefaultInstance(props);
        Store store = session.getStore(protocol);
        store.connect(username, password);
        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]);  
            if (pmm.isNew()) {  
                continue;  
            }else {  
                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());  //若是已读 则不处理后续 
                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());  
                message[i].setFlag(Flags.Flag.SEEN, true);//设置为已读，不能使用。。。。 
                message[i].saveChanges();  
                pmm.setAttachPath("c:\\");     
                pmm.saveAttachMent((Part) message[i]);   
            }                
        }     
    }     
}  

上面的properties设置还可以用这种方式

// 准备连接服务器的会话信息 
Properties props = new Properties(); 
props.setProperty("mail.store.protocol", "pop3");       // 协议 或者使用imap协议 可以支持是否为已读邮件之类的操作
props.setProperty("mail.pop3.port", "110");             // 端口 imap的端口为143
props.setProperty("mail.pop3.host", "pop3.163.com");    // pop3服务器 公司应该使用自己的服务器地址就ok了

// 创建Session实例对象 
Session session = Session.getInstance(props); 
Store store = session.getStore("pop3"); 
store.connect("[email protected]", "123456abc");

这两种方式都可以的。

本文转自：http://blog.csdn.net/caoyishuai/article/details/7870418