急，请教javamail中身份验证的问题，在线等待！！

redfox33 2006-07-07 03:44:29

问题1：
发送email的时候，出现javax.mail.AuthenticationFailedException异常，
我已经 props.put("mail.smtp.auth","true")了阿，虽然出现异常，但有时候也能发送成功，有时候则失败，很不稳定。请大家给我看看代码哪里有问题
javamail.jar (1.4)
activation.jar

package com.kysoft.common;

import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
import java.util.Date;
import javax.activation.*;
import java.io.*;

public final class sendMail
{

private boolean isDebug = false; //发送mail时是否需要输出调试信息

private Properties props; //系统属性

private Session mailSession; //邮件会话对象
private MimeMessage mimeMsg; //MIME邮件对象
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 String mailContentType = null;
private String mailCharset = null;

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 sendMail()
{
props = new Properties(); //获得系统属性对象
}

public void setDebug(boolean isDebug)
{
this.isDebug = isDebug ;
}

private void setNeedAuth(boolean need)
{
if(need)
{
props.put("mail.smtp.auth","true");
}else{
props.put("mail.smtp.auth","false");
}
}

private void setSmtpHost(String hostName)
{
props.put("mail.smtp.host",hostName); //设置SMTP主机
}

private boolean createMimeMessage()
{
try
{
System.out.println("准备获取邮件会话对象！");
mailSession = Session.getInstance(props); //获得邮件会话对象
mailSession.setDebug(isDebug);

}
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(mailSession); //创建MIME邮件对象

return true;
}
catch(Exception e)
{
System.err.println("创建MIME邮件对象失败！"+e);
return false;
}
}

private void setNamePass(String name,String pass)
{
this.username = name;
this.password = pass;
}

//======================================================

private boolean setFrom(String mailFrom)
{
System.out.println("设置发信人！");
if(mailFrom == null) return false;
try
{
//InternetAddress from=new InternetAddress(mailFrom);
//mimeMsg.setFrom(mailFrom);

mimeMsg.setFrom(new InternetAddress(mailFrom)); //设置发信人
return true;
}
catch(Exception e)
{
return false;
}
}

private boolean setTo(String mailTo)
{
System.out.println("设置收信人！");
if(mailTo == null) return false;
try
{

InternetAddress to=new InternetAddress(mailTo);
mimeMsg.setRecipient(Message.RecipientType.TO,to);

//mimeMsg.setRecipient(Message.RecipientType.TO,new InternetAddress(mailTo));
return true;
}
catch(Exception e)
{
return false;
}

}

private boolean setSubject(String mailSubject)
{
System.out.println("设置邮件主题！");
if(mailSubject == null) return false;
try
{
mimeMsg.setSubject(mailSubject);
//System.out.println(mailSubject);
return true;
}
catch(Exception e)
{
System.err.println("设置邮件主题发生错误！");
return false;
}
}

private boolean setSentDate()
{
System.out.println("设置邮件发送日期！");

try
{
mimeMsg.setSentDate(new Date());
return true;
}
catch(Exception e)
{
System.err.println("设置邮件发送日期发生错误！");
return false;
}
}

private boolean setBody(String mailBody)
{
try
{

BodyPart mdp=new MimeBodyPart();//新建一个存放信件内容的BodyPart对象
mdp.setContent(mailBody,this.mailContentType + ";charset=" + this.mailCharset);//***************
mp=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)
mp.addBodyPart(mdp);//将BodyPart加入到MimeMultipart对象中(可以加入多个BodyPart)

return true;
}
catch(Exception e)
{
System.err.println("设置邮件正文时发生错误！"+e);
return false;
}
}

//邮件发送前的信息准备工作
private boolean mailSendReady()
{

try
{
this.setSmtpHost("smtp.163.com");
this.setNeedAuth(true);

if(!this.createMimeMessage()) return false;

this.username = "service@163.com"; //换成你自己测试用的163邮箱
this.password = "123456";

this.mailContentType = "text/html";
this.mailCharset = "gb2312";

if(!this.setFrom("service@163.com")) return false;
if(!this.setTo("coustomer@163.com")) return false;
if(!this.setSubject("hello,this is a test javamail!")) return false;
if(!this.setSentDate()) return false;
if(!this.setBody("邮件发送测试！")) return false;

return true;

}
catch(Exception e)
{
System.err.println("邮件发送准备时发生错误！"+e);
return false;
}

}

public boolean sendMail()
{
try
{
if(!mailSendReady()) return false;

mimeMsg.setContent(mp); //把mp作为消息对象的内容
mimeMsg.saveChanges();
System.out.println("正在发送邮件....");

Transport transport = mailSession.getTransport("smtp");

transport.connect((String)props.get("mail.smtp.host"),username,password);

transport.sendMessage(mimeMsg,mimeMsg.getAllRecipients());

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;
}
}

public static void main(String[] args)
{

sendMail themail = new sendMail();
boolean flag=themail.sendMail();
System.out.println("email sent "+flag);

}
}

//----------------------运行结果
准备获取邮件会话对象！
准备创建MIME邮件对象！
设置发信人！
设置收信人！
设置邮件主题！
设置邮件发送日期！
正在发送邮件....
邮件发送失败！javax.mail.AuthenticationFailedException
email sent false
Press any key to continue...

问题2：
smtp.host/送邮箱/送账号/密码等信息变化不大，所以我就存在数据库表中，如果在网站一运行（或者信息修改变动后）的时候，从数据库中取出，存到Properties中，这样以后再发送邮件就不需要访问数据库，直接从Properties取出，这部份代码应该怎么写才能保证每次取出的Properties都是同一个？
万分感激，问题解决后马上送分

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