基于Javamail开发的简易邮箱客户端，包括邮件发送，邮件转发，发送附件，邮件接受，邮件删除，邮件查询

package bottom; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.BufferedWriter; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStreamWriter; import java.io.UnsupportedEncodingException; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Properties; import javax.mail.Address; import javax.mail.BodyPart; import javax.mail.Flags; import javax.mail.Folder; import javax.mail.Message; import javax.mail.MessagingException; import javax.mail.Multipart; import javax.mail.Part; import javax.mail.Session; import javax.mail.Store; import javax.mail.internet.InternetAddress; import javax.mail.internet.MimeMessage; import javax.mail.internet.MimeMultipart; import javax.mail.internet.MimeUtility; import mailPara.mailpara; /** * 使用POP3协议接收邮件 */ public class newRecmail extends mailpara{ /*public static void main(String[] args) throws Exception { receive(); }*/ /** * 接收邮件 */ public static void receive() throws Exception { // 准备连接服务器的会话信息 Properties props = new Properties(); props.setProperty("mail.store.protocol", "pop3"); // 协议 props.setProperty("mail.pop3.port", "110"); // 端口 //props.setProperty("mail.pop3.host", "pop3.sina.com"); // pop3服务器 props.setProperty("mail.pop3.host", mailaccountinfo.getPop3()); // 创建Session实例对象 Session session = Session.getInstance(props); Store store = session.getStore("pop3"); //store.connect("pop3.sina.com","lzy_mail_test@sina.com", "lzy123456"); store.connect(mailaccountinfo.getPop3(),mailaccountinfo.getAccount(), mailaccountinfo.getPassword()); // 获得收件箱 Folder folder = store.getFolder("INBOX"); /* Folder.READ_ONLY：只读权限 * Folder.READ_WRITE：可读可写（可以修改邮件的状态） */ folder.open(Folder.READ_WRITE); //打开收件箱 // 由于POP3协议无法获知邮件的状态,所以getUnreadMessageCount得到的是收件箱的邮件总数 System.out.println("未读邮件数: " + folder.getUnreadMessageCount()); // 由于POP3协议无法获知邮件的状态,所以下面得到的结果始终都是为0 System.out.println("删除邮件数: " + folder.getDeletedMessageCount()); System.out.println("新邮件: " + folder.getNewMessageCount()); // 获得收件箱中的邮件总数 System.out.println("邮件总数: " + folder.getMessageCount()); //设置邮件总数 mailaccountinfo.setMsgcount(folder.getMessageCount()); // 得到收件箱中的所有邮件,并解析 Message[] messages = folder.getMessages(); parseMessage(messages); //释放资源 folder.close(true); store.close(); } /** * 解析邮件 * @param messages 要解析的邮件列表 */ public static void parseMessage(Message ...messages) throws MessagingException, IOException { if (messages == null || messages.length < 1) throw new MessagingException("未找到要解析的邮件!"); // 解析所有邮件 for (int i = 0, count = messages.length; i < count; i++) { MimeMessage msg = (MimeMessage) messages[i]; System.out.println("------------------解析第" + msg.getMessageNumber() + "封邮件-------------------- "); System.out.println("主题: " + getSubject(msg)); //设置邮件主题 mailaccountinfo.setSubject(getSubject(msg), i); System.out.println("发件人: " + getFrom(msg)); //设置收件人地址 mailaccountinfo.setAddress(getFrom(msg), i); System.out.println("收件人：" + getReceiveAddress(msg, null)); //设置发送时间 mailaccountinfo.setSentDate(getSentDate(msg, null), i); System.out.println("发送时间：" + getSentDate(msg, null)); System.out.println("是否已读：" + isSeen(msg)); System.out.println("邮件优先级：" + getPriority(msg)); System.out.println("是否需要回执：" + isReplySign(msg)); System.out.println("邮件大小：" + msg.getSize() * 1024 + "kb"); boolean isContainerAttachment = isContainAttachment(msg); System.out.println("是否包含附件：" + isContainerAttachment); if (isContainerAttachment) { saveAttachment(msg, System.getProperty("user.dir")+"/bin/"+msg.getSubject() + "_"); //保存附件 } StringBuffer content = new StringBuffer(30); getMailTextContent(msg, content); System.out.println("邮件正文：" + (content.length() > 100 ? content.substring(0,100) + "..." : content)); System.out.println("------------------第" + msg.getMessageNumber() + "封邮件解析结束-------------------- "); System.out.println(); //mailaccountinfo.setText((String) messages[i].getContent(), i); Object o = msg.getContent(); if(o instanceof Multipart) { Multipart multipart = (Multipart) o ; for (int j = 0, n = multipart.getCount(); j < n; j++) { //System.out.println("处理第" + j + "部分"); Part part = multipart.getBodyPart(j); if (part.getDisposition() != null) { String strFileNmae = MimeUtility.decodeText(part.getFileName()); //MimeUtility.decodeText解决附件名乱码问题 System.out.println("发现附件: " + MimeUtility.decodeText(part.getFileName())); System.out.println("内容类型: " + MimeUtility.decodeText(part.getContentType())); System.out.println("附件内容:" + part.getContent()); InputStream in = part.getInputStream();// 打开附件的输入流 // 读取附件字节并存储到文件中 java.io.FileOutputStream out = new FileOutputStream(strFileNmae); int data; while((data = in.read()) != -1) { out.write(data); } in.close(); out.close(); }else { System.out.println(part.getContentType()); /*if(part.getContentType().startsWith("text/plain")) { System.out.println("文本内容：" + part.getContent()); account1.setText((String) part.getContent(), i); } else {*/ //System.out.println("HTML内容：" + part.getContent()); if(part.getContentType().startsWith("text/html")) { mailaccountinfo.setText((String) part.getContent(), i); String PATH_html=System.getProperty("user.dir")+"/bin/"; String imagname=MimeUtility.decodeText(part.getContent().toString()); imagname=imagname.replace("cid:", System.getProperty("user.dir")+"/bin/"); imagname=imagname.replace("\" modifysize", ".jpg\" modifysize"); //imagname=imagname.replace("png", "png.jpg"); String name=mailaccountinfo.getSentDate()[i]+".html"; String fname=PATH_html+name; File pathhtml = new File(fname); OutputStreamWriter rdf = new OutputStreamWriter(new FileOutputStream(pathhtml),"UTF-8"); BufferedWriter writer=new BufferedWriter(rdf); //Writer rdf=new FileWriter(pathhtml); rdf.write(imagname); rdf.close(); } } }//解包, 取出 MultiPart的各个部分, 每部分可能是邮件内容, /*reMultipart(multipart); if(part.getContentType().startsWith("text/plain")) { //System.out.println("文本内容：" + part.getContent()); } else { //System.out.println("HTML内容：" + part.getContent()); } */ } else if (o instanceof Part){ Part part = (Part) o;