jsp实现邮件的发送

如果程序出现 454 Authentication failed, please open smtp flag first! 错误，那么一般是邮箱没有开通POP3/SMTP服务，登录邮箱，在设置中开启该服务即可 ！

另外需要的jar包如下: imap.jar, mail.jar, smtp.jar,  可以自己在网上下载。

package com.hzml.serve;import java.io.IOException;
import java.util.Date;
import java.util.Properties;import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;@WebServlet("/MailResponse.servlet")
public class MailResponse extends HttpServlet {private static final long serialVersionUID = 1L;public MailResponse() {super();}private void process(HttpServletRequest request, HttpServletResponse response) {try{String pwd = "hjzgg5211314";//发件人邮箱密码String mailfrom = request.getParameter("emailFrom"); //网易的邮箱String wangyiFrom = mailfrom.substring(0, mailfrom.indexOf('@'));//网易邮箱的用户名String tu = "163.com"; //你邮箱的后缀域名String tto= request.getParameter("emailTo"); //接收邮件的邮箱String ttitle= "在线软件工程管理员回复！";String tcontent = request.getParameter("messageTo");Properties props=new Properties();props.put("mail.smtp.host","smtp."+tu);//邮箱SMTP服务器地址端口
    props.put("mail.smtp.auth","true");//这样才能通过验证
    Session s=Session.getInstance(props);s.setDebug(true);MimeMessage message=new MimeMessage(s);//给消息对象设置发件人/收件人/主题/发信时间
    InternetAddress from=new InternetAddress(mailfrom); //发件人的qq邮箱
    message.setFrom(from);InternetAddress to=new InternetAddress(tto);//收件人的邮箱
    message.setRecipient(Message.RecipientType.TO,to);message.setSubject(ttitle);message.setSentDate(new Date());//给消息对象设置内容
    BodyPart mdp=new MimeBodyPart();//新建一个存放信件内容的BodyPart对象
    mdp.setContent(tcontent,"text/html;charset=gb2312");//给BodyPart对象设置内容和格式/编码方式
    Multipart mm=new MimeMultipart();//新建一个MimeMultipart对象用来存放BodyPart对//象(事实上可以存放多个)
    mm.addBodyPart(mdp);//将BodyPart加入到MimeMultipart对象中(可以加入多个BodyPart)
    message.setContent(mm);//把mm作为消息对象的内容
    message.saveChanges();Transport transport=s.getTransport("smtp");transport.connect("smtp."+tu, wangyiFrom, pwd); //这里的wangyiFrom为发件人网易账号
    transport.sendMessage(message,message.getAllRecipients());transport.close();}catch(Exception e){e.printStackTrace();}}protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {// TODO Auto-generated method stub
        process(request, response);}protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {// TODO Auto-generated method stub
        process(request, response);}}