用JAVAMAIL发送邮件的一个简单例子

写了一个收发邮件的应用程序[在列表里面可以看到]但是毕竟有些复杂，关键部分其实也就是几行代码，为了大家使用方便，我把发送邮件的代码单独拿了出来，并且分为发送附件/不发送附件两个方法，便于大家查看，只是什么设计啦，编程思想啦，等等就谈不到了，呵呵，大家将就吧
JDK版本

1.4.x

其 他

JAVAMAIL相关包

功能简介：

简单的邮件发送功能，可以发送附件

源代码如下

import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;
import java.util.*;
import java.util.*;
import java.text.*;
import java.io.*;
public class SendMail
{
//传入的参数有密码、姓名、谁发、发给谁、主题、正文内容、smtp地址、附件文件路径、附件的新文件名、发送类型（text/html）
//发送邮件主函数
public String sendmail(int myport,String password,String username,String myfrom,String myto,String mysubject,String mytext,String mysmtp,String[] filepath,String[] newfilename,String htmlandtext)
{
try{
int indexstr=0;
if (filepath[0]!=null && !filepath[0].equals(""))
indexstr=1;
//替换字符串
//     jbemail myjbemail=new jbemail();
//     filepath=myjbemail.myreplace(filepath,"\\","\\\\");
//     System.out.println("附件地址"+filepath+"服务器地址"+mysmtp+mysmtp.length());
//Properties props = new Properties();
Properties props = System.getProperties();
Session sendMailSession;
Store store;  //收邮件时使用
Transport transport;//发邮件时使用
props.put("mail.smtp.host",mysmtp);
props.put("mail.smtp.auth","true");
SmtpAuthenticator sa=new SmtpAuthenticator(username,password);
sendMailSession = Session.getInstance(props,sa);
//sendMailSession = Session.getInstance(props,null);
sendMailSession.setDebug(true);

MimeMessage newMessage = new MimeMessage(sendMailSession);
newMessage.setFrom(new InternetAddress(myfrom));
newMessage.setRecipient(Message.RecipientType.TO, new InternetAddress(myto));
//设定邮件格式
newMessage.setSentDate(new Date());
System.out.println(htmlandtext+"邮件正文格式");
Multipart multipart = new MimeMultipart();
if (htmlandtext.equals("text"))
{
//获得文本格式的邮件

newMessage.setSubject(mysubject);
BodyPart messageBodyPart = new MimeBodyPart();
messageBodyPart.setText(mytext);
multipart.addBodyPart(messageBodyPart);
}
else if(htmlandtext.equals("html"))
{
//设置邮件内容，将邮件body部分转化为HTML格式
newMessage.setSubject(mysubject,"gb2312");
BodyPart messageBodyPart = new MimeBodyPart();
messageBodyPart.setDataHandler(new DataHandler(mytext,"text/html;charset=gb2312"));
multipart.addBodyPart(messageBodyPart);
}
if (indexstr>0)
{

for(int i=0;i                    {
if (newfilename[i]!=null)
{
//创建BodyPart对象以便获得附件
BodyPart messageBodyPart = new MimeBodyPart();
System.out.println("附件地址"+filepath[i]);
DataSource source = new FileDataSource(filepath[i]);
messageBodyPart.setDataHandler(new DataHandler(source));
messageBodyPart.setFileName(newfilename[i]);
multipart.addBodyPart(messageBodyPart);
}
}
}
//将正文和附件添加到邮件中
newMessage.setContent(multipart);
newMessage.saveChanges();
//transport = sendMailSession.getStore("pop3");
transport = sendMailSession.getTransport("smtp");
transport.connect(mysmtp,myport,username,password);
//transport.connect();
transport.send(newMessage,newMessage.getAllRecipients());
System.out.println("成功发送到"+myto);
return "ok";
}
catch(MessagingException m)
{
System.out.println(m.toString()+"失败");
return myto;
}
}
//不含发送附件的函数
//传入的参数有port地址、密码、姓名、谁发、发给谁、主题、正文内容、smtp地址、发送类型（text/html）
public String sendmail(String mailPathlog,int myport,String password,String username,String myfrom,String myto,String mysubject,String mytext,String mysmtp,String htmlandtext)
{
try{
//解码
mysubject=java.net.URLDecoder.decode(mysubject);
//Properties props = new Properties();
Properties props = System.getProperties();
Session sendMailSession;
Store store;  //收邮件时使用
Transport transport;//发邮件时使用
props.put("mail.smtp.host",mysmtp);
props.put("mail.smtp.auth","true");
SmtpAuthenticator sa=new SmtpAuthenticator(username,password);
//身份验证
sendMailSession = Session.getInstance(props,sa);
//sendMailSession = Session.getInstance(props,null);
sendMailSession.setDebug(true);
MimeMessage newMessage = new MimeMessage(sendMailSession);
try
{
newMessage.setFrom(new InternetAddress(myfrom,"法律之星"));
newMessage.setRecipient(Message.RecipientType.TO, new InternetAddress(myto));
}
catch(java.io.UnsupportedEncodingException ex)
{
System.out.println(ex.toString());
}
//设定邮件格式
newMessage.setSentDate(new Date());
System.out.println(htmlandtext+"邮件正文格式");
Multipart multipart = new MimeMultipart();
if (htmlandtext.equals("text"))
{
//获得文本格式的邮件

newMessage.setSubject(mysubject);
BodyPart messageBodyPart = new MimeBodyPart();
messageBodyPart.setText(mytext);
multipart.addBodyPart(messageBodyPart);
}
else if(htmlandtext.equals("html"))
{
//设置邮件内容，将邮件body部分转化为HTML格式
newMessage.setSubject(mysubject,"gb2312");
BodyPart messageBodyPart = new MimeBodyPart();
messageBodyPart.setDataHandler(new DataHandler(mytext,"text/html;charset=gb2312"));
multipart.addBodyPart(messageBodyPart);
}
//将正文添加到邮件中
newMessage.setContent(multipart);
newMessage.saveChanges();
//transport = sendMailSession.getStore("pop3");
transport = sendMailSession.getTransport("smtp");
transport.connect(mysmtp,myport,username,password);
//transport.connect();
transport.send(newMessage,newMessage.getAllRecipients());
System.out.println("成功发送到"+myto+mytext);
return "ok";
}
catch(MessagingException m)
{
System.out.println(m.toString()+"失败");
//生成当前日期
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
Date dateTime= new Date();
String sDateTime=dateFormat.format(dateTime);
//生成日志文件
try
{
File filelog=new File(mailPathlog+"\\"+"mainlog.txt");
BufferedWriter out2=new BufferedWriter(new FileWriter(filelog.getPath(),true));
String newline = System.getProperty("line.separator");
out2.write(sDateTime+"/"+mysmtp+"/"+myfrom+"/"+myto+"/"+m.toString()+"/"+newline);
out2.close();
}
catch (IOException ex)
{
System.out.println(ex.toString());
}
return myto;
}
}
class SmtpAuthenticator extends Authenticator
{
//SMTP身份验证
public SmtpAuthenticator(String username,String password)
{
this.username=username;
this.password=password;
}
public PasswordAuthentication getPasswordAuthentication()
{
return new  PasswordAuthentication(this.username,this.password);
}
String username=null;
String password=null;
}
}