用Java类实现JavaMail发送邮件的例子

/*

在java版经常看到有人问如何用javamail发送邮件?如何接收邮件?如何访问多个文件夹等。问题零散,而历史的回复早已经淹没在问题的海洋之中。


本人之前所做过一个java项目,其中包含有WebMail功能,当初为用java实现而对javamail摸索了一段时间,总算有点收获。看到论坛中的经常有此方面的问题,因此把我的一些经验帖出来,希望对大家有些帮助。


此篇仅介绍用javamail实现发送邮件功能,其中涉及smtp认证,邮件附件发送,及HTML内容邮件等。

其它有关多邮箱的实现,接收POP3邮件及IMAP等内容,将在后续文章中介绍。


如下程序需要:javamail,JAF包,j2ee.jar包含了上述两个包,建议大家安装J2SDKEE或直接拷贝j2ee.jar,将其添加到jbuilder的library中,或系统ClassPath中

*/



package com.me.util.mail;



import java.util.*;

import javax.mail.*;

import javax.mail.internet.*;

import java.util.Date;

import javax.activation.*;

import java.io.*;

import com.me.util.*;


public class sendMail {


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 sendMail() {

setSmtpHost(getConfig.mailHost);//如果没有指定邮件服务器,就从getConfig类中获取

createMimeMessage();

}


public sendMail(String smtp){

setSmtpHost(smtp);

createMimeMessage();

}




/**

* @param hostName String

*/

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

}



/**

* @return boolean

*/

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;

}

}




/**

* @param need boolean

*/

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");

}

}




/**

* @param name String

* @param pass String

*/

public void setNamePass(String name,String pass) {

username = name;

password = pass;

}



/**

* @param mailSubject String

* @return boolean

*/

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;

}

}




/**

* @param mailBody String

*/

public boolean setBody(String mailBody) {

try{

BodyPart bp = new MimeBodyPart();

bp.setContent(""+mailBody,"text/html;charset=GB2312");

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;

}

}



/**

* @param name String

* @param pass String

*/

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;

}

}




/**

* @param name String

* @param pass String

*/

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; }

}



/**

* @param name String

* @param pass String

*/

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; }


}


/**

* @param name String

* @param pass String

*/

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; }

}



/**

* @param name String

* @param pass String

*/

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;

}

}



/**

* Just do it as this

*/

public static void main(String[] args) {


String mailbody = ""+

"

csdn
";

sendMail themail = new sendMail("smtp.msn.com");

themail.setNeedAuth(true);


if(themail.setSubject("标题") == false) return;

if(themail.setBody(mailbody) == false) return;

if(themail.setTo("[email protected]") == false) return;

if(themail.setFrom("[email protected]") == false) return;

if(themail.addFileAffix("c:\\boot.ini") == false) return;

themail.setNamePass("user","password");


if(themail.sendout() == false) return;

}

}

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