package com.zz.mail;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.Properties;
import javax.mail.Address;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.NoSuchProviderException;
import javax.mail.Part;
import javax.mail.Session;
import javax.mail.Store;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeUtility;
/**
* 邮件接受测试
*
*/
public class POP3MailReceiverTest {
public POP3MailReceiverTest() {
try {
// 1. 设置连接信息, 生成一个 Session
String protocol = "pop3";
boolean isSSL = true;
String host = "pop.163.com";
int port = 995;
String username = "xxxx@163.com";
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);
// 2. 获取 Store 并连接到服务器
Store store = session.getStore(protocol);
store.connect(username, password);
Folder folder = store.getDefaultFolder();// 默认父目录
if (folder == null) {
System.out.println("服务器不可用");
return;
}
/*
System.out.println("默认信箱名:" + folder.getName());
Folder[] folders = folder.list();// 默认目录列表
for(int i = 0; i < folders.length; i++) {
System.out.println(folders[0].getName());
}
System.out.println("默认目录下的子目录数: " + folders.length);
*/
Folder popFolder = folder.getFolder("INBOX");// 获取收件箱
popFolder.open(Folder.READ_WRITE);// 可读邮件,可以删邮件的模式打开目录
// 4. 列出来收件箱 下所有邮件
Message[] messages = popFolder.getMessages();
// 取出来邮件数
int msgCount = popFolder.getMessageCount();
System.out.println("共有邮件: " + msgCount + "封");
// FetchProfile fProfile = new FetchProfile();// 选择邮件的下载模式,
// 根据网速选择不同的模式
// fProfile.add(FetchProfile.Item.ENVELOPE);
// folder.fetch(messages, fProfile);// 选择性的下载邮件
// 5. 循环处理每个邮件并实现邮件转为新闻的功能
for (int i = 0; i < msgCount; i++) {
// 单个邮件
System.out.println("第" + i +"邮件开始");
mailReceiver(messages[i]);
System.out.println("第" + i +"邮件结束");
//邮件读取用来校验
messages[i].writeTo(new FileOutputStream("D:/pop3MailReceiver"+ i +".eml"));
}
// 7. 关闭 Folder 会真正删除邮件, false 不删除
popFolder.close(true);
// 8. 关闭 store, 断开网络连接
store.close();
} catch (NoSuchProviderException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* 解析邮件
*
* @param messages 邮件对象
* @param i
* @return
* @throws IOException
* @throws MessagingException
* @throws FileNotFoundException
* @throws UnsupportedEncodingException
*/
private void mailReceiver(Message msg)throws Exception{
// 发件人信息
Address[] froms = msg.getFrom();
if(froms != null) {
//System.out.println("发件人信息:" + froms[0]);
InternetAddress addr = (InternetAddress)froms[0];
System.out.println("发件人地址:" + addr.getAddress());
System.out.println("发件人显示名:" + addr.getPersonal());
}
System.out.println("邮件主题:" + msg.getSubject());
// getContent() 是获取包裹内容, Part相当于外包装
Object o = msg.getContent();
if(o instanceof Multipart) {
Multipart multipart = (Multipart) o ;
reMultipart(multipart);
} else if (o instanceof Part){
Part part = (Part) o;
rePart(part);
} else {
System.out.println("类型" + msg.getContentType());
System.out.println("内容" + msg.getContent());
}
}
/**
* @param part 解析内容
* @throws Exception
*/
private void rePart(Part part) throws MessagingException,
UnsupportedEncodingException, IOException, FileNotFoundException {
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 {
if(part.getContentType().startsWith("text/plain")) {
System.out.println("文本内容：" + part.getContent());
} else {
//System.out.println("HTML内容：" + part.getContent());
}
}
}
/**
* @param multipart // 接卸包裹（含所有邮件内容(包裹+正文+附件)）
* @throws Exception
*/
private void reMultipart(Multipart multipart) throws Exception {
//System.out.println("邮件共有" + multipart.getCount() + "部分组成");
// 依次处理各个部分
for (int j = 0, n = multipart.getCount(); j < n; j++) {
//System.out.println("处理第" + j + "部分");
Part part = multipart.getBodyPart(j);//解包, 取出 MultiPart的各个部分, 每部分可能是邮件内容,
// 也可能是另一个小包裹(MultipPart)
// 判断此包裹内容是不是一个小包裹, 一般这一部分是 正文 Content-Type: multipart/alternative
if (part.getContent() instanceof Multipart) {
Multipart p = (Multipart) part.getContent();// 转成小包裹
//递归迭代
reMultipart(p);
} else {
rePart(part);
}
}
}
/**
* @param args
*/
public static void main(String[] args) {
new POP3MailReceiverTest();
}
}
