import Javax.mail.*;
import javax.mail.internet.*;
import java.util.*;
import java.io.*;
/**
* <p>Title: 使用JavaMail接收邮件</p>
* <p>Description: 实例JavaMail包接收邮件，本实例没有实现接收邮件的附件。</p>
* <p>Copyright: Copyright (c) 2003</p>
* <p>Filename: POPMail.java</p>
* @version 1.0
*/
public class POPMail{
/**
*<br>方法说明：主方法，接收用户输入的邮箱服务器、用户名和密码
*<br>输入参数：
*<br>返回类型：
*/
public static void main(String args[]){
try{
String popServer=args[0];
String popUser=args[1];
String popPassWord=args[2];
receive(popServer, popUser, popPassword);
}catch (Exception ex){
System.out.println("Usage: java com.lotontech.mail.POPMail"+" popServer popUser popPassword");
}
System.exit(0);
}
/**
*<br>方法说明：接收邮件信息
*<br>输入参数：
*<br>返回类型：
*/
public static void receive(String popServer, String popUser, String popPassword){
Store store=null;
Folder folder=null;
try{
//获取默认会话
Properties props = System.getProperties();
Session session = Session.getDefaultInstance(props, null);
//使用POP3会话机制，连接服务器
store = session.getStore("pop3");
store.connect(popServer, popUser, popPassword);
//获取默认文件夹
folder = store.getDefaultFolder();
if (folder == null) throw new Exception("No default folder");
//假如是收件箱
folder = folder.getFolder("INBOX");
if (folder == null) throw new Exception("No POP3 INBOX");
//使用只读方式打开收件箱
folder.open(Folder.READ_ONLY);
//得到文件夹信息，获取邮件列表
Message[] msgs = folder.getMessages();
for (int msgNum = 0; msgNum < msgs.length; msgNum++){
printMessage(msgs[msgNum]);
}
}catch (Exception ex){
ex.printStackTrace();
}
finally{
//释放资源
try{
if (folder!=null) folder.close(false);
if (store!=null) store.close();
}catch (Exception ex2) {
ex2.printStackTrace();
}
}
}
/**
*<br>方法说明：打印邮件信息
*<br>输入参数：Message message 信息对象
*<br>返回类型：
*/
public static void printMessage(Message message){
try{
//获得发送邮件地址
String from=((InternetAddress)message.getFrom()[0]).getPersonal();
if (from==null) from=((InternetAddress)message.getFrom()[0]).getAddress();
System.out.println("FROM: "+from);
//获取主题
String subject=message.getSubject();
System.out.println("SUBJECT: "+subject);
//获取信息对象
Part messagePart=message;
Object content=messagePart.getContent();
//附件
if (content instanceof Multipart){
messagePart=((Multipart)content).getBodyPart(0);
System.out.println("[ Multipart Message ]");
}
//获取content类型
String contentType=messagePart.getContentType();
//假如邮件内容是纯文本或者是Html，那么打印出信息
System.out.println("CONTENT:"+contentType);
if (contentType.startsWith("text/plain")
contentType.startsWith("text/html")){
InputStream is = messagePart.getInputStream();
BufferedReader reader=new BufferedReader(new InputStreamReader(is));
String thisLine=reader.readLine();
while (thisLine!=null){
System.out.println(thisLine);
thisLine=reader.readLine();
}
}
System.out.println("-------------- END ---------------");
}catch (Exception ex){
ex.printStackTrace();
}
}
}
