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，整理出例如以下代码，仅仅是实现功能。代码并未优化。
使用的时候仅仅须要填写自己邮箱账号password就可以（须要源代码的能够留下邮箱）
以下贴出代码，
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
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",
"是否须要回执", "邮件大小", "是否包括附件", "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server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"); // pop3server
// 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", "password");</span></span>
// 获得收件箱
Folder folder = store.getFolder("INBOX");
/*
* Folder.READ_ONLY：仅仅读权限 Folder.READ_WRITE：可读可写（能够改动邮件的状态）
*/
folder.open(Folder.READ_WRITE); // 打开收件箱
// 因为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());
// 因为POP3协议无法获知邮件的状态,所以以下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());
// 得到收件箱中的全部邮件,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);
// **************往工作表中加入数据*****************
// "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);
}
// 解析全部邮件
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";
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("是否须要回执："
+ POP3ReceiveMailTest.isReplySign(msg));
System.out.println("邮件大小：" + 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("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", "是否须要回执", "邮件大小", "是否包括附件", "邮件正文" };这是excel表的字段 顺序不可变 要和以下的顺序一致。下载的相关文档和图片在D盘的mailtmp目录下
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; } /** * 依据收件人类型。获取邮件收件人、抄送和密送地址。假设收件人类型为空，则获得全部的收件人 * <p> * Message.RecipientType.TO 收件人 * </p> * <p> * Message.RecipientType.CC 抄送 * </p> * <p> * Message.RecipientType.BCC 密送 * </p> * * @param msg * 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); } /** * 推断邮件中是否包括附件 * * @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; } /** * 推断邮件是否已读 * * @param msg * 邮件内容 * @return 假设邮件已读返回true,否则返回false * @throws MessagingException */ public static boolean isSeen(MimeMessage msg) throws MessagingException { return msg.getFlags().contains(Flags.Flag.SEEN); } /** * 推断邮件是否须要阅读回执 * * @param msg * 邮件内容 * @return 须要回执返回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"; else priority = "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 { // 假设是文本类型的附件，通过getContent方法能够取到文本内容，但这不是我们须要的结果。所以在这里要做推断 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当中一个组合体 * @param destDir * 附件保存文件夹 * @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 // 复杂体邮件包括多个邮件体 int partCount = multipart.getCount(); for (int i = 0; i < partCount; i++) { // 获得复杂体邮件中当中一个邮件体 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文件夹 * * @param is * 输入流 * @param fileName * 文件名称 * @param destDir * 文件存储文件夹 * @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(); } /**点击打开链接 * 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); } } }
须要导入两个jar包
下载地址https://yunpan.cn/cqj2hyXEUf5fQ 訪问password 6acc
https://yunpan.cn/cqj27LI3kjBbU 訪问password 3712
