javamail发送带附件的邮件

package mail;

import java.util.* ;

import java.io.* ;

import javax.mail.* ;

import javax.mail.internet.* ;

import javax.activation.* ;

public class Mail {

//定义发件人、收件人、SMTP服务器、用户名、密码、主题、内容等

private String displayName;

private String to;

private String from;

private String smtpServer;

private String username;

private String password;

private String subject;

private String content;

private boolean ifAuth; //服务器是否要身份认证

private String filename="";

private Vector file = new Vector(); //用于保存发送附件的文件名的集合

/**

* 设置SMTP服务器地址

*/

public void setSmtpServer(String smtpServer){

this.smtpServer=smtpServer;

}

/**

* 设置发件人的地址

*/

public void setFrom(String from){

this.from=from;

}

/**

* 设置显示的名称

*/

public void setDisplayName(String displayName){

this.displayName=displayName;

}

/**

* 设置服务器是否需要身份认证

*/

public void setIfAuth(boolean ifAuth){

this.ifAuth=ifAuth;

}

/**

* 设置E-mail用户名

*/

public void setUserName(String username){

this.username=username;

}

/**

* 设置E-mail密码

*/

public void setPassword(String password){

this.password=password;

}

/**

* 设置接收者

*/

public void setTo(String to){

this.to=to;

}

/**

* 设置主题

*/

public void setSubject(String subject){

this.subject=subject;

}

/**

* 设置主体内容

*/

public void setContent(String content){

this.content=content;

}

/**

* 该方法用于收集附件名

*/

public void addAttachfile(String fname){

file.addElement(fname);

}

public Mail(){

}

/**

* 初始化SMTP服务器地址、发送者E-mail地址、用户名、密码、接收者、主题、内容

*/

public Mail(String smtpServer,String from,String displayName,String username,String password,String to,String subject,String content){

this.smtpServer=smtpServer;

this.from=from;

this.displayName=displayName;

this.ifAuth=true;

this.username=username;

this.password=password;

this.to=to;

this.subject=subject;

this.content=content;

}

/**

* 初始化SMTP服务器地址、发送者E-mail地址、接收者、主题、内容

*/

public Mail(String smtpServer,String from,String displayName,String to,String subject,String content){

this.smtpServer=smtpServer;

this.from=from;

this.displayName=displayName;

this.ifAuth=false;

this.to=to;

this.subject=subject;

this.content=content;

}

/**

* 发送邮件

*/

public HashMap send(){

HashMap map=new HashMap();

map.put("state", "success");

String message="邮件发送成功！";

Session session=null;

Properties props = System.getProperties();

props.put("mail.smtp.host", smtpServer);

if(ifAuth){ //服务器需要身份认证

props.put("mail.smtp.auth","true");

SmtpAuth smtpAuth=new SmtpAuth(username,password);

session=Session.getDefaultInstance(props, smtpAuth);

}else{

props.put("mail.smtp.auth","false");

session=Session.getDefaultInstance(props, null);

}

session.setDebug(true);

Transport trans = null;

try {

Message msg = new MimeMessage(session);

try{

Address from_address = new InternetAddress(from, displayName);

msg.setFrom(from_address);

}catch(java.io.UnsupportedEncodingException e){

e.printStackTrace();

}

InternetAddress[] address={new InternetAddress(to)};

msg.setRecipients(Message.RecipientType.TO,address);

msg.setSubject(subject);

Multipart mp = new MimeMultipart();

MimeBodyPart mbp = new MimeBodyPart();

mbp.setContent(content.toString(), "text/html;charset=gb2312");

mp.addBodyPart(mbp);

if(!file.isEmpty()){//有附件

Enumeration efile=file.elements();

while(efile.hasMoreElements()){

mbp=new MimeBodyPart();

filename=efile.nextElement().toString(); //选择出每一个附件名

FileDataSource fds=new FileDataSource(filename); //得到数据源

mbp.setDataHandler(new DataHandler(fds)); //得到附件本身并至入BodyPart

mbp.setFileName(fds.getName()); //得到文件名同样至入BodyPart

mp.addBodyPart(mbp);

}

file.removeAllElements();

}

msg.setContent(mp); //Multipart加入到信件

msg.setSentDate(new Date()); //设置信件头的发送日期

//发送信件

msg.saveChanges();

trans = session.getTransport("smtp");

trans.connect(smtpServer, username, password);

trans.sendMessage(msg, msg.getAllRecipients());

trans.close();

}catch(AuthenticationFailedException e){

map.put("state", "failed");

message="邮件发送失败！错误原因：/n"+"身份验证错误!";

e.printStackTrace();

}catch (MessagingException e) {

message="邮件发送失败！错误原因：/n"+e.getMessage();

map.put("state", "failed");

e.printStackTrace();

Exception ex = null;

if ((ex = e.getNextException()) != null) {

System.out.println(ex.toString());

ex.printStackTrace();

}

}

//System.out.println("/n提示信息:"+message);

map.put("message", message);

return map;

}

}

SmtpAuth.java 代码

package mail;

public class SmtpAuth extends javax.mail.Authenticator {

private String username,password;

public SmtpAuth(String username,String password){

this.username = username;

this.password = password;

}

protected javax.mail.PasswordAuthentication getPasswordAuthentication() {

return new javax.mail.PasswordAuthentication(username,password);

}

}