利用JavaMail怎么实现一个邮件发送与接收功能

package com.ys.mail; import java.io.ObjectInputStream.GetField;import java.util.Date;import java.util.Properties; import javax.mail.Address;import javax.mail.Message;import javax.mail.MessagingException;import javax.mail.Session;import javax.mail.Transport;import javax.mail.internet.AddressException;import javax.mail.internet.InternetAddress;import javax.mail.internet.MimeMessage;import javax.swing.text.html.MinimalHTMLWriter; public class SendMailText { //发件人地址 public static String senderAddress = "xxx@163.com"; //收件人地址 public static String recipientAddress = "xxx@qq.com"; //发件人账户名 public static String senderAccount = "xxx"; //发件人账户密码 public static String senderPassword = "xxx";  public static void main(String[] args) throws Exception { //1、连接邮件服务器的参数配置 Properties props = new Properties(); //设置用户的认证方式 props.setProperty("mail.smtp.auth", "true"); //设置传输协议 props.setProperty("mail.transport.protocol", "smtp"); //设置发件人的SMTP服务器地址 props.setProperty("mail.smtp.host", "smtp.163.com"); //2、创建定义整个应用程序所需的环境信息的 Session 对象 Session session = Session.getInstance(props); //设置调试信息在控制台打印出来 session.setDebug(true); //3、创建邮件的实例对象 Message msg = getMimeMessage(session); //4、根据session对象获取邮件传输对象Transport Transport transport = session.getTransport(); //设置发件人的账户名和密码 transport.connect(senderAccount, senderPassword); //发送邮件，并发送到所有收件人地址，message.getAllRecipients() 获取到的是在创建邮件对象时添加的所有收件人, 抄送人, 密送人 transport.sendMessage(msg,msg.getAllRecipients());   //如果只想发送给指定的人，可以如下写法 //transport.sendMessage(msg, new Address[]{new InternetAddress("xxx@qq.com")});   //5、关闭邮件连接 transport.close(); }   public static MimeMessage getMimeMessage(Session session) throws Exception{ //创建一封邮件的实例对象 MimeMessage msg = new MimeMessage(session); //设置发件人地址 msg.setFrom(new InternetAddress(senderAddress));  msg.setRecipient(MimeMessage.RecipientType.TO,new InternetAddress(recipientAddress)); //设置邮件主题 msg.setSubject("邮件主题","UTF-8"); //设置邮件正文 msg.setContent("简单的纯文本邮件！", "text/html;charset=UTF-8"); //设置邮件的发送时间,默认立即发送 msg.setSentDate(new Date());   return msg; } }