import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Properties;
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;

public class ReceiveEmail {
    public static void receive() {
        Properties props = new Properties();
        //存储接收邮件服务器使用的协议，这里以POP3为例
        props.setProperty("mail.store.protocol", "pop3");
        //设置接收邮件服务器的地址，这里还是以网易163为例
        props.setProperty("mail.pop3.host", "pop3.sina.cn");
        //根据属性新建一个邮件会话.
        Session session=Session.getInstance(props);
        
        try {
            //从会话对象中获得POP3协议的Store对象
            Store store = session.getStore("pop3");
            
            //如果需要查看接收邮件的详细信息，需要设置Debug标志
            session.setDebug(false);
            
            //连接邮件服务器
            store.connect("pop3.sina.cn", "用户名", "密码");
            
            //获取邮件服务器的收件箱
            Folder folder = store.getFolder("INBOX");
            //以只读权限打开收件箱
            folder.open(Folder.READ_ONLY);
            
            //获取收件箱中的邮件，也可以使用getMessage(int 邮件的编号)来获取具体某一封邮件
            Message[] message = folder.getMessages();
            for (int i=0; i < message.length; i++) {
                Part messPart = message[i];
                Object content = message[i].getContent();
                messPart = ((Multipart)content).getBodyPart(0);
                InputStream   in   =   messPart.getInputStream(); 
                BufferedReader   reader   =   new   BufferedReader(new   InputStreamReader(in)); 
                String   str   =   reader.readLine(); 
                
                while (str!=null){
                    System.out.println(str);
                    str=reader.readLine();
                }
            }
            //关闭连接
            folder.close(false);
            store.close();
        } catch (NoSuchProviderException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (MessagingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
          
    }
    
     public static void main(String[] args) {
        receive();
        System.out.println("ok");
    }
}