獲取163郵箱的郵件 並下載附件

老師要求讓獲取郵箱郵件內容，發件人、收件人、發送時間等等。轉存到excel里面。並下載郵件帶的附件，通過網上搜集資料，整理出例如以下代碼，僅僅是實現功能。代碼並未優化。

使用的時候僅僅須要填寫自己郵箱賬號password就可以（須要源代碼的能夠留下郵箱）

以下貼出代碼，

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   
		{   
			
		//輸出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();   
		}   
		}   
	

}

獲取的內容就會存在d盤的testWrite.xls

public class helpHandler {

	static OutputStream osq;
	static WritableWorkbook wwb;
	static WritableSheet ws;
	<span style="font-size:18px;color:#ff6666;"><strong>static String array[] = { "主題", "發件人", "收件人", "發送時間", "是否已讀", "郵件優先級",
			"是否須要回執", "郵件大小", "是否包括附件", "郵件正文" };</strong></span>

	public helpHandler(OutputStream os) throws IOException {

		this.osq = os;

	}

	/**
	 * 接收郵件
	 */
	public static void receive() throws Exception {

		// 准備連接server的會話信息
		Properties props = new Properties();
		props.setProperty("mail.store.protocol", "pop3"); // 協議
		props.setProperty("mail.pop3.port", "110"); // 端口
		props.setProperty("mail.pop3.host", "pop3.163.com"); // pop3server
		// 創建Session實例對象
		Session session = Session.getInstance(props);
		Store store = session.getStore("pop3");
	<span style="font-size:32px;">	<span style="color:#ff0000;">store.connect("163郵箱賬號", "password");</span></span>
		// 獲得收件箱
		Folder folder = store.getFolder("INBOX");
		/*
		 * Folder.READ_ONLY：僅僅讀權限 Folder.READ_WRITE：可讀可寫（能夠改動郵件的狀態）
		 */
		folder.open(Folder.READ_WRITE); // 打開收件箱

		// 因為POP3協議無法獲知郵件的狀態,所以getUnreadMessageCount得到的是收件箱的郵件總數
		System.out.println("未讀郵件數: " + folder.getUnreadMessageCount());

		// 因為POP3協議無法獲知郵件的狀態,所以以下得到的結果始終都是為0
		System.out.println("刪除郵件數: " + folder.getDeletedMessageCount());
		System.out.println("新郵件: " + folder.getNewMessageCount());

		// 獲得收件箱中的郵件總數
		System.out.println("郵件總數: " + folder.getMessageCount());

		// 得到收件箱中的全部郵件,並解析
		Message[] messages = folder.getMessages();
		parseMessage(messages);

		// 釋放資源
		folder.close(true);
		store.close();

	}

	/**
	 * 解析郵件
	 * 
	 * @param messages
	 *            要解析的郵件列表
	 * @throws WriteException
	 * @throws RowsExceededException
	 */
	public static void parseMessage(Message... messages)
			throws MessagingException, IOException, RowsExceededException,
			WriteException {
		if (messages == null || messages.length < 1)
			throw new MessagingException("未找到要解析的郵件!");

		try {
			wwb = Workbook.createWorkbook(osq);
			// 創建Excel工作表 指定名稱和位置
			ws = wwb.createSheet("Test Sheet 1", 0);
			// **************往工作表中加入數據*****************
			// "未讀郵件數", "刪除郵件數", "新郵件", "郵件總數",
			// 寫入標題
			for (int i = 0; i < array.length; i++) {
				Label labe1 = new Label(i, 0, array[i]);
				ws.addCell(labe1);
			}

			// 解析全部郵件
			for (int i = 0, count = messages.length; i < count; i++) {
				MimeMessage msg = (MimeMessage) messages[i];
				System.out.println("------------------解析第"
						+ msg.getMessageNumber() + "封郵件-------------------- ");
				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";
				else
					str1 = "否";
				if (isContainerAttachment)
					str3 = "是";
				else
					str3 = "否";
				if (b2)
					str2 = "是";
				else
					str2 = "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("主題: " + POP3ReceiveMailTest.getSubject(msg));
				System.out.println("發件人: " + POP3ReceiveMailTest.getFrom(msg));
				System.out.println("收件人："
						+ POP3ReceiveMailTest.getReceiveAddress(msg, null));
				System.out.println("發送時間："
						+ POP3ReceiveMailTest.getSentDate(msg, null));
				System.out.println("是否已讀：" + POP3ReceiveMailTest.isSeen(msg));
				System.out.println("郵件優先級："
						+ POP3ReceiveMailTest.getPriority(msg));
				System.out.println("是否須要回執："
						+ POP3ReceiveMailTest.isReplySign(msg));
				System.out.println("郵件大小：" + msg.getSize() * 1024 + "kb");

				System.out.println("是否包括附件：" + 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("郵件正文：" + (content.length() > 100 ?
				// content.substring(0,100) + "..." : content));
				System.out.println("郵件正文：" + content);

				System.out.println("------------------第"
						+ msg.getMessageNumber()
						+ "封郵件解析結束-------------------- ");
				System.out.println();
			}

			// 寫入工作表
			wwb.write();
			wwb.close();
		} catch (Exception e) {
			e.printStackTrace();
		}

	}

}

String array[] = { "主題", "發件人", "收件人", "發送時間", "是否已讀", "郵件優先級", "是否須要回執", "郵件大小", "是否包括附件", "郵件正文" };這是excel表的字段  順序不可變 要和以下的順序一致。下載的相關文檔和圖片在D盤的mailtmp目錄下

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協議接收郵件
 */
public class POP3ReceiveMailTest {

	/**
	 * 獲得郵件主題
	 * 
	 * @param msg
	 *            郵件內容
	 * @return 解碼后的郵件主題
	 */
	public static String getSubject(MimeMessage msg)
			throws UnsupportedEncodingException, MessagingException {
		return MimeUtility.decodeText(msg.getSubject());
	}

	/**
	 * 獲得郵件發件人
	 * 
	 * @param msg
	 *            郵件內容
	 * @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("沒有發件人!");

		InternetAddress address = (InternetAddress) froms[0];
		String person = address.getPersonal();
		if (person != null) {
			person = MimeUtility.decodeText(person) + " ";
		} else {
			person = "";
		}
		from = person + "<" + address.getAddress() + ">";

		return from;
	}

	/**
	 * 依據收件人類型。獲取郵件收件人、抄送和密送地址。
假設收件人類型為空，則獲得全部的收件人
	 * <p>
	 * Message.RecipientType.TO 收件人
	 * </p>
	 * <p>
	 * Message.RecipientType.CC 抄送
	 * </p>
	 * <p>
	 * Message.RecipientType.BCC 密送
	 * </p>
	 * 
	 * @param msg
	 *            郵件內容
	 * @param type
	 *            收件人類型
	 * @return 收件人1 <郵件地址1>, 收件人2 <郵件地址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("沒有收件人!");
		for (Address address : addresss) {
			InternetAddress internetAddress = (InternetAddress) address;
			receiveAddress.append(internetAddress.toUnicodeString())
					.append(",");
		}

		receiveAddress.deleteCharAt(receiveAddress.length() - 1); // 刪除最后一個逗號

		return receiveAddress.toString();
	}

	/**
	 * 獲得郵件發送時間
	 * 
	 * @param msg
	 *            郵件內容
	 * @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);
	}

	/**
	 * 推斷郵件中是否包括附件
	 * 
	 * @param msg
	 *            郵件內容
	 * @return 郵件中存在附件返回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;
	}

	/**
	 * 推斷郵件是否已讀
	 * 
	 * @param msg
	 *            郵件內容
	 * @return 假設郵件已讀返回true,否則返回false
	 * @throws MessagingException
	 */
	public static boolean isSeen(MimeMessage msg) throws MessagingException {
		return msg.getFlags().contains(Flags.Flag.SEEN);
	}

	/**
	 * 推斷郵件是否須要閱讀回執
	 * 
	 * @param msg
	 *            郵件內容
	 * @return 須要回執返回true,否則返回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;
	}

	/**
	 * 獲得郵件的優先級
	 * 
	 * @param msg
	 *            郵件內容
	 * @return 1(High):緊急 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 = "緊急";
			else if (headerPriority.indexOf("5") != -1
					|| headerPriority.indexOf("Low") != -1)
				priority = "低";
			else
				priority = "普通";
		}
		return priority;
	}

	/**
	 * 獲得郵件文本內容
	 * 
	 * @param part
	 *            郵件體
	 * @param content
	 *            存儲郵件文本內容的字符串
	 * @throws MessagingException
	 * @throws IOException
	 */
	public static void getMailTextContent(Part part, StringBuffer content)
			throws MessagingException, IOException {
		// 假設是文本類型的附件，通過getContent方法能夠取到文本內容，但這不是我們須要的結果。所以在這里要做推斷
		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
	 *            郵件中多個組合體中的當中一個組合體
	 * @param destDir
	 *            附件保存文件夾
	 * @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(); // 復雜體郵件
			// 復雜體郵件包括多個郵件體
			int partCount = multipart.getCount();
			for (int i = 0; i < partCount; i++) {
				// 獲得復雜體郵件中當中一個郵件體
				BodyPart bodyPart = multipart.getBodyPart(i);
				// 某一個郵件體也有可能是由多個郵件體組成的復雜體
				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);
		}
	}

	/**
	 * 讀取輸入流中的數據保存至指定文件夾
	 * 
	 * @param is
	 *            輸入流
	 * @param fileName
	 *            文件名稱
	 * @param destDir
	 *            文件存儲文件夾
	 * @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();
	}

	/**點擊打開鏈接
	 * 文本解碼
	 * 
	 * @param encodeText
	 *            解碼MimeUtility.encodeText(String text)方法編碼后的文本
	 * @return 解碼后的文本
	 * @throws UnsupportedEncodingException
	 */
	public static String decodeText(String encodeText)
			throws UnsupportedEncodingException {
		if (encodeText == null || "".equals(encodeText)) {
			return "";
		} else {
			return MimeUtility.decodeText(encodeText);
		}
	}
}




 
須要導入兩個jar包

 下載地址
https://yunpan.cn/cqj2hyXEUf5fQ  訪問password 6acc
 
https://yunpan.cn/cqj27LI3kjBbU  訪問password 3712
 
完整代碼地址