获取163邮箱的邮件 并下载附件

老师要求让获取邮箱邮件内容，发件人、收件人、发送时间等等，转存到excel里面，并下载邮件带的附件，通过网上搜集资料，整理出如下代码，只是实现功能，代码并未优化。

使用的时候只需要填写自己邮箱账号密码就可

下面贴出代码，

package ltg.defualt;import java.io.File;import java.io.FileOutputStream;import java.io.OutputStream;import ltg.helper.POP3ReceiveMailTest;import ltg.helper.helpHandler;public class test {/** * @param args */public static void main(String[] args) {try   {   //输出Excel   <strong><span style="color:#ff6666;">File fileWrite = new File("d:/testWrite.xls"); </span>  </strong>fileWrite.createNewFile();   OutputStream osq = new FileOutputStream(fileWrite);   //helpHandler.writeExcel(osq);  helpHandler handler=new helpHandler(osq);handler.receive();}   catch(Exception e)   {   e.printStackTrace();   }   }   }

获取的内容就会存在d盘的testWrite.xls

两个类如下

package ltg.helper;import java.io.IOException;import java.io.OutputStream;import jxl.*;import jxl.write.*;import jxl.write.biff.RowsExceededException;import java.util.Properties;import javax.mail.Folder;import javax.mail.Message;import javax.mail.MessagingException;import javax.mail.Session;import javax.mail.Store;import javax.mail.internet.MimeMessage;public class helpHandler {static OutputStream osq;static WritableWorkbook wwb;static WritableSheet ws;<span style="font-size:18px;color:#ff6666;"><strong>static String array[] = { "主题", "发件人", "收件人", "发送时间", "是否已读", "邮件优先级","是否需要回执", "邮件大小", "是否包含附件", "邮件正文" };</strong></span>public helpHandler(OutputStream os) throws IOException {this.osq = os;}/** * 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", "pop3.163.com"); // pop3服务器// 创建Session实例对象Session session = Session.getInstance(props);Store store = session.getStore("pop3");<span style="font-size:32px;"><span style="color:#ff0000;">store.connect("163邮箱账号", "密码");</span></span>// 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0System.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());// 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 * @throws WriteException * @throws RowsExceededException */public static void parseMessage(Message... messages)throws MessagingException, IOException, RowsExceededException,WriteException {if (messages == null || messages.length < 1)throw new MessagingException("未找到要解析的邮件!");try {wwb = Workbook.createWorkbook(osq);// 创建Excel工作表 指定名称和位置ws = wwb.createSheet("Test Sheet 1", 0);// **************往工作表中添加数据*****************// "未读邮件数", "删除邮件数", "新邮件", "邮件总数",// 写入标题for (int i = 0; i < array.length; i++) {Label labe1 = new Label(i, 0, array[i]);ws.addCell(labe1);}// 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-------------------- ");boolean b1 = POP3ReceiveMailTest.isSeen(msg);boolean isContainerAttachment = POP3ReceiveMailTest.isContainAttachment(msg);boolean b2=POP3ReceiveMailTest.isReplySign(msg);String str1 = "";String str2 = "";String str3 = "";if (b1)str1 = "是";elsestr1 = "否";if (isContainerAttachment)str3 = "是";elsestr3 = "否";if (b2)str2 = "是";elsestr2 = "否";StringBuffer content = new StringBuffer(30);POP3ReceiveMailTest.getMailTextContent(msg, content);String array1[] = { POP3ReceiveMailTest.getSubject(msg),POP3ReceiveMailTest.getFrom(msg),POP3ReceiveMailTest.getReceiveAddress(msg, null),POP3ReceiveMailTest.getSentDate(msg, null), str1,POP3ReceiveMailTest.getPriority(msg), str2,msg.getSize() * 1024 + "kb", str3, content.toString() };str1 = "";str2 = "";str3 = "";for (int j = 0; j < array1.length; j++) {Label labe2 = new Label(j, i + 1, array1[j]);ws.addCell(labe2);}System.out.println("主题: " + POP3ReceiveMailTest.getSubject(msg));System.out.println("发件人: " + POP3ReceiveMailTest.getFrom(msg));System.out.println("收件人："+ POP3ReceiveMailTest.getReceiveAddress(msg, null));System.out.println("发送时间："+ POP3ReceiveMailTest.getSentDate(msg, null));System.out.println("是否已读：" + POP3ReceiveMailTest.isSeen(msg));System.out.println("邮件优先级："+ POP3ReceiveMailTest.getPriority(msg));System.out.println("是否需要回执："+ POP3ReceiveMailTest.isReplySign(msg));System.out.println("邮件大小：" + msg.getSize() * 1024 + "kb");System.out.println("是否包含附件：" + isContainerAttachment);if (isContainerAttachment) {<span style="font-size:24px;"><strong>POP3ReceiveMailTest.saveAttachment(msg, "d:\\mailtmp\\"+ msg.getSubject() + "_"); // 保存附件</strong></span>}// StringBuffer content = new StringBuffer(30);// POP3ReceiveMailTest.getMailTextContent(msg, content);// System.out.println("邮件正文：" + (content.length() > 100 ?// content.substring(0,100) + "..." : content));System.out.println("邮件正文：" + content);System.out.println("------------------第"+ msg.getMessageNumber()+ "封邮件解析结束-------------------- ");System.out.println();}// 写入工作表wwb.write();wwb.close();} catch (Exception e) {e.printStackTrace();}}}

String array[] = { "主题", "发件人", "收件人", "发送时间", "是否已读", "邮件优先级", "是否需要回执", "邮件大小", "是否包含附件", "邮件正文" };这是excel表的字段  顺序不可变 要和下面的顺序一致。下载的相关文档和图片在D盘的mailtmp文件夹下

package ltg.helper;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;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;/** * 使用POP3协议接收邮件 */public class POP3ReceiveMailTest {/** * 获得邮件主题 *  * @param msg *            邮件内容 * @return 解码后的邮件主题 */public static String getSubject(MimeMessage msg)throws UnsupportedEncodingException, MessagingException {return MimeUtility.decodeText(msg.getSubject());}/** * 获得邮件发件人 *  * @param msg *            邮件内容 * @return 姓名 <Email地址> * @throws MessagingException * @throws UnsupportedEncodingException */public static String getFrom(MimeMessage msg) throws MessagingException,UnsupportedEncodingException {String from = "";Address[] froms = msg.getFrom();if (froms.length < 1)throw new MessagingException("没有发件人!");InternetAddress address = (InternetAddress) froms[0];String person = address.getPersonal();if (person != null) {person = MimeUtility.decodeText(person) + " ";} else {person = "";}from = person + "<" + address.getAddress() + ">";return from;}/** * 根据收件人类型，获取邮件收件人、抄送和密送地址。如果收件人类型为空，则获得所有的收件人 * <p> * Message.RecipientType.TO 收件人 * </p> * <p> * Message.RecipientType.CC 抄送 * </p> * <p> * Message.RecipientType.BCC 密送 * </p> *  * @param msg *            邮件内容 * @param type *            收件人类型 * @return 收件人1 <邮件地址1>, 收件人2 <邮件地址2>, ... * @throws MessagingException */public static String getReceiveAddress(MimeMessage msg,Message.RecipientType type) throws MessagingException {StringBuffer receiveAddress = new StringBuffer();Address[] addresss = null;if (type == null) {addresss = msg.getAllRecipients();} else {addresss = msg.getRecipients(type);}if (addresss == null || addresss.length < 1)throw new MessagingException("没有收件人!");for (Address address : addresss) {InternetAddress internetAddress = (InternetAddress) address;receiveAddress.append(internetAddress.toUnicodeString()).append(",");}receiveAddress.deleteCharAt(receiveAddress.length() - 1); // 删除最后一个逗号return receiveAddress.toString();}/** * 获得邮件发送时间 *  * @param msg *            邮件内容 * @return yyyy年mm月dd日 星期X HH:mm * @throws MessagingException */public static String getSentDate(MimeMessage msg, String pattern)throws MessagingException {Date receivedDate = msg.getSentDate();if (receivedDate == null)return "";if (pattern == null || "".equals(pattern))pattern = "yyyy年MM月dd日 E HH:mm ";return new SimpleDateFormat(pattern).format(receivedDate);}/** * 判断邮件中是否包含附件 *  * @param msg *            邮件内容 * @return 邮件中存在附件返回true，不存在返回false * @throws MessagingException * @throws IOException */public static boolean isContainAttachment(Part part)throws MessagingException, IOException {boolean flag = false;if (part.isMimeType("multipart/*")) {MimeMultipart multipart = (MimeMultipart) part.getContent();int partCount = multipart.getCount();for (int i = 0; i < partCount; i++) {BodyPart bodyPart = multipart.getBodyPart(i);String disp = bodyPart.getDisposition();if (disp != null&& (disp.equalsIgnoreCase(Part.ATTACHMENT) || disp.equalsIgnoreCase(Part.INLINE))) {flag = true;} else if (bodyPart.isMimeType("multipart/*")) {flag = isContainAttachment(bodyPart);} else {String contentType = bodyPart.getContentType();if (contentType.indexOf("application") != -1) {flag = true;}if (contentType.indexOf("name") != -1) {flag = true;}}if (flag)break;}} else if (part.isMimeType("message/rfc822")) {flag = isContainAttachment((Part) part.getContent());}return flag;}/** * 判断邮件是否已读 *  * @param msg *            邮件内容 * @return 如果邮件已读返回true,否则返回false * @throws MessagingException */public static boolean isSeen(MimeMessage msg) throws MessagingException {return msg.getFlags().contains(Flags.Flag.SEEN);}/** * 判断邮件是否需要阅读回执 *  * @param msg *            邮件内容 * @return 需要回执返回true,否则返回false * @throws MessagingException */public static boolean isReplySign(MimeMessage msg)throws MessagingException {boolean replySign = false;String[] headers = msg.getHeader("Disposition-Notification-To");if (headers != null)replySign = true;return replySign;}/** * 获得邮件的优先级 *  * @param msg *            邮件内容 * @return 1(High):紧急 3:普通(Normal) 5:低(Low) * @throws MessagingException */public static String getPriority(MimeMessage msg) throws MessagingException {String priority = "普通";String[] headers = msg.getHeader("X-Priority");if (headers != null) {String headerPriority = headers[0];if (headerPriority.indexOf("1") != -1|| headerPriority.indexOf("High") != -1)priority = "紧急";else if (headerPriority.indexOf("5") != -1|| headerPriority.indexOf("Low") != -1)priority = "低";elsepriority = "普通";}return priority;}/** * 获得邮件文本内容 *  * @param part *            邮件体 * @param content *            存储邮件文本内容的字符串 * @throws MessagingException * @throws IOException */public static void getMailTextContent(Part part, StringBuffer content)throws MessagingException, IOException {// 如果是文本类型的附件，通过getContent方法可以取到文本内容，但这不是我们需要的结果，所以在这里要做判断boolean isContainTextAttach = part.getContentType().indexOf("name") > 0;if (part.isMimeType("text/*") && !isContainTextAttach) {content.append(part.getContent().toString());} else if (part.isMimeType("message/rfc822")) {getMailTextContent((Part) part.getContent(), content);} else if (part.isMimeType("multipart/*")) {Multipart multipart = (Multipart) part.getContent();int partCount = multipart.getCount();for (int i = 0; i < partCount - 1; i++) {BodyPart bodyPart = multipart.getBodyPart(i);getMailTextContent(bodyPart, content);}}}/** * 保存附件 *  * @param part *            邮件中多个组合体中的其中一个组合体 * @param destDir *            附件保存目录 * @throws UnsupportedEncodingException * @throws MessagingException * @throws FileNotFoundException * @throws IOException */public static void saveAttachment(Part part, String destDir)throws UnsupportedEncodingException, MessagingException,FileNotFoundException, IOException {if (part.isMimeType("multipart/*")) {Multipart multipart = (Multipart) part.getContent(); // 复杂体邮件// 复杂体邮件包含多个邮件体int partCount = multipart.getCount();for (int i = 0; i < partCount; i++) {// 获得复杂体邮件中其中一个邮件体BodyPart bodyPart = multipart.getBodyPart(i);// 某一个邮件体也有可能是由多个邮件体组成的复杂体String disp = bodyPart.getDisposition();if (disp != null&& (disp.equalsIgnoreCase(Part.ATTACHMENT) || disp.equalsIgnoreCase(Part.INLINE))) {InputStream is = bodyPart.getInputStream();saveFile(is, destDir, decodeText(bodyPart.getFileName()));} else if (bodyPart.isMimeType("multipart/*")) {saveAttachment(bodyPart, destDir);} else {String contentType = bodyPart.getContentType();if (contentType.indexOf("name") != -1|| contentType.indexOf("application") != -1) {saveFile(bodyPart.getInputStream(), destDir,decodeText(bodyPart.getFileName()));}}}} else if (part.isMimeType("message/rfc822")) {saveAttachment((Part) part.getContent(), destDir);}}/** * 读取输入流中的数据保存至指定目录 *  * @param is *            输入流 * @param fileName *            文件名 * @param destDir *            文件存储目录 * @throws FileNotFoundException * @throws IOException */private static void saveFile(InputStream is, String destDir, String fileName)throws FileNotFoundException, IOException {BufferedInputStream bis = new BufferedInputStream(is);BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(new File(destDir + fileName)));int len = -1;while ((len = bis.read()) != -1) {bos.write(len);bos.flush();}bos.close();bis.close();}/** * 文本解码 *  * @param encodeText *            解码MimeUtility.encodeText(String text)方法编码后的文本 * @return 解码后的文本 * @throws UnsupportedEncodingException */public static String decodeText(String encodeText)throws UnsupportedEncodingException {if (encodeText == null || "".equals(encodeText)) {return "";} else {return MimeUtility.decodeText(encodeText);}}}

需要导入两个jar包

下载地址

https://yunpan.cn/cqj2hyXEUf5fQ  访问密码 6acc

https://yunpan.cn/cqj27LI3kjBbU  访问密码 3712

完整的demo 下载路径

http://download.csdn.net/detail/ltg01/9505665