我需要一个基于jsp的webmail的服务器和程序啊不知道那里有啊

因需要基于WEB的MAIL发送程序（其实就是取回密码时发送密码），在网上看到一段MAIL程序，现在将其修改为WEB界面SERVLET处理并提交数据库寻找用户名的以发送回密码。大家可研究交流下。另外使用的时候建个表单，把用户名提交到getpost就可以了。
有三个类，一个是数据库类(dbconn.java)，一个是MAIL发送类(mymail.java)，还有一个是
SERVLET取得表单用户名及一些返回给用户的信息(getpost.java)。
调试此程序需要下载JAVAMAIL包与JAF包。可到SUN公司去下载。
dbconn.java类：
package webmail;
import javax.sql.*;
import java.sql.*;
public class dbconn {
String username;//数据库帐号
String password;//数据库密码
String drivername;//驱动名称
String url;//数据库地址
Connection conn;//连接对象
public dbconn()
{
}
public Connection getconn() throws SQLException,Exception
{
username="root";
password="";
drivername="org.gjt.mm.mysql.Driver";
url="jdbc:mysql://localhost/news";
Class.forName( drivername ).newInstance();
conn=DriverManager.getConnection(url,username,password);
return conn;
}
}
getpost.java类：
package webmail;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.sql.*;
import java.sql.*;
import java.util.*;
import java.io.*;
public class getpost extends HttpServlet{
String username="";//用户名
String pass=null;//用户密码
Connection conn=null;//连接对象
ResultSet rs=null;//结果集
String mail=null;//用户MAIL地址
public getpost()
{
}
public void doPost(HttpServletRequest request,HttpServletResponse response)
throws ServletException,IOException
{
PrintWriter out=response.getWriter();
this.username=(String)request.getParameter("username");
System.out.println("取得用户名");
try
{
Check(username);
}
catch(Exception e)
{
System.out.println("连接出错！");
}
if(pass!=null)
{
System.out.println("准备建立MAIL对象");
mymail themail = new mymail();
themail.setNeedAuth(true);//设置是否需要MAIL帐号与密码验证
themail.setSubject("你的密码");
themail.setBody("你的用户名是："+this.username+"
你的密码是："+this.pass);
themail.setTo(this.mail);
themail.setFrom("[email protected]");
themail.setNamePass("username","password");//在此输入你的MAIL帐号与密码
if(themail.sendout() == false)
{
return;
}
String ok=new String("发送成功，密码已发送到你注册时的MAIL信箱地址，请查收！".getBytes("GBK"),"ISO-8859-1");
out.println("<script language='javascript'>alert('"+ok+"');history.back();</script>");
}
else
{
System.out.println("对不起，发送失败！");
String no=new String("对不起，没有找到你的用户名！".getBytes("GBK"),"ISO-8859-1");
out.println("<script language='javascript'>alert('"+no+"');history.back();</script>");
return;
}
}
public void Check(String username) throws Exception,SQLException
{
try
{
dbconn get=new dbconn();
conn=get.getconn();
String name=username;
Statement query=conn.createStatement();
String sql="select * from userlist where username='"+name+"'";
rs=query.executeQuery(sql);
System.out.println("准备取得密码");
if(!rs.next())
{System.out.println("对不起，没有找到你的用户名！");
this.pass=null;
return;
}
else
{
this.mail=rs.getString("f_email");
this.pass=rs.getString("password");
}
}
catch(Exception e)
{
System.out.println("数据出错！");
}
}
}
mymail.java类：
package webmail;
import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
import java.util.Date;
import javax.activation.*;
import java.io.*;
public class mymail {
private MimeMessage mimeMsg; //MIME邮件对象
private Session session; //邮件会话对象
private Properties props; //系统属性
private boolean needAuth = false; //smtp是否需要认证
private String username = ""; //smtp认证用户名和密码
private String password = "";
private Multipart mp; //Multipart对象,邮件内容,标题,附件等内容均添加到其中后再生成MimeMessage对象
public mymail() {
setSmtpHost("smtp.21cn.com");//SMTP服务器
createMimeMessage();
}
public mymail(String smtp){
setSmtpHost(smtp);
createMimeMessage();
}
public void setSmtpHost(String hostName) {
System.out.println("设置系统属性：mail.smtp.host = "+hostName);
if(props == null)props = System.getProperties(); //获得系统属性对象
props.put("mail.smtp.host",hostName); //设置SMTP主机
}
public boolean createMimeMessage()
{
try{
System.out.println("准备获取邮件会话对象！");
session = Session.getDefaultInstance(props,null); //获得邮件会话对象
}
catch(Exception e){
System.err.println("获取邮件会话对象时发生错误！"+e);
return false;
}
System.out.println("准备创建MIME邮件对象！");
try{
mimeMsg = new MimeMessage(session); //创建MIME邮件对象
mp = new MimeMultipart();
return true;
}
catch(Exception e){
System.err.println("创建MIME邮件对象失败！"+e);
return false;
}
}
public void setNeedAuth(boolean need) {
System.out.println("设置smtp身份认证：mail.smtp.auth = "+need);
if(props == null)props = System.getProperties();
if(need){
props.put("mail.smtp.auth","true");
}else{
props.put("mail.smtp.auth","false");
}
}
public void setNamePass(String name,String pass) {
username = name;
password = pass;
}
public boolean setSubject(String mailSubject) {
System.out.println("设置邮件主题！");
try{
mimeMsg.setSubject(mailSubject);
return true;
}
catch(Exception e) {
System.err.println("设置邮件主题发生错误！");
return false;
}
}
public boolean setBody(String mailBody) {
try{
BodyPart bp = new MimeBodyPart();
bp.setContent("<meta http-equiv=Content-Type content=text/html; charset=??????>"+mailBody,"text/html;charset=??????");
mp.addBodyPart(bp);
return true;
}
catch(Exception e){
System.err.println("设置邮件正文时发生错误！"+e);
return false;
}
}
public boolean addFileAffix(String filename) {System.out.println("增加邮件附件："+filename);
try{
BodyPart bp = new MimeBodyPart();
FileDataSource fileds = new FileDataSource(filename);
bp.setDataHandler(new DataHandler(fileds));
bp.setFileName(fileds.getName());
mp.addBodyPart(bp);
return true;
}
catch(Exception e){
System.err.println("增加邮件附件："+filename+"发生错误！"+e);
return false;
}
}
public boolean setFrom(String from) {
System.out.println("设置发信人！");
try{
mimeMsg.setFrom(new InternetAddress(from)); //设置发信人
return true;
}
catch(Exception e)
{ return false; }
}
public boolean setTo(String to){
if(to == null)return false;try{
mimeMsg.setRecipients(Message.RecipientType.TO,InternetAddress.parse(to));
return true;
}
catch(Exception e)
{ return false; }
}
public boolean setCopyTo(String copyto)
{
if(copyto == null)return false;
try{
mimeMsg.setRecipients(Message.RecipientType.CC,(Address[])InternetAddress.parse(copyto));
return true;
}
catch(Exception e)
{ return false; }
}
public boolean sendout()
{
try{
mimeMsg.setContent(mp);
mimeMsg.saveChanges();
System.out.println("正在发送邮件....");
Session mailSession = Session.getInstance(props,null);
Transport transport = mailSession.getTransport("smtp");
transport.connect((String)props.get("mail.smtp.host"),username,password);
transport.sendMessage(mimeMsg,mimeMsg.getRecipients(Message.RecipientType.TO));
//transport.send(mimeMsg);
System.out.println("发送邮件成功！");
transport.close();
return true;
}
catch(Exception e)
{
System.err.println("邮件发送失败！"+e);
return false;
}
}
}
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我需要一个基于jsp的webmail的服务器和程序啊不知道那里有啊

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