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Java网络编程：利用Java mail包发送电子邮件

2016-01-12 08:37 399 查看

下面代码是利用Java mail包封装了一个发送邮件的类

import java.io.File;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Properties;

import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;

public class SendMail {
private static final String MAIL_ADDRESS_REGEX = "^[\\w\\.=-]+@[\\w\\.-]+\\.[\\w]{2,3}$";

private String mailServer;
private String sender;
private String[] receiver;

public SendMail(){

}

public void setMailBasicInfo(String mailServer,String sender,String receiver){
this.mailServer = mailServer;
this.sender = sender;
this.receiver =receiver.split(",");
}

public void setMailBasicInfo(String mailServer,String sender,String[] users){
this.mailServer = mailServer;
this.sender = sender;
this.receiver = users;
}

public void setMailBasicInfo(String mailServer,String sender,List<String> users){
this.mailServer = mailServer;
this.sender = sender;
this.receiver = new String[users.size()];
users.toArray(this.receiver);
}

public boolean send(String subject, String content, List<String> fileNames)
{
subject = subject==null?"":subject;
content = content==null?"":content;
Properties props = new Properties();
props.put("mail.smtp.host", mailServer);
Session session = Session.getInstance(props, null);
try
{
InternetAddress[] receiver = getReceiverList();
if (receiver.length == 0)
{
System.out.println("receiver is null");
return false;
}
MimeMessage msg = new MimeMessage(session);
msg.setFrom(new InternetAddress(sender));
msg.setRecipients(Message.RecipientType.TO, receiver);
msg.setSubject(subject);
msg.setSentDate(new Date());

Multipart container = new MimeMultipart();
MimeBodyPart textBodyPart = new MimeBodyPart();
textBodyPart.setContent(content.toString(), "text/html;charset=gbk");
container.addBodyPart(textBodyPart);

doAttachFile(container,fileNames);
msg.setContent(container);
System.out.println("begin send mail");
Transport.send(msg);
System.out.println("send mail success");
}
catch (MessagingException e)
{
System.out.println("send mail fail");
System.out.println(e);
return false;
}
catch(Exception e){
return false;
}
return true;
}

public boolean send(String subject, String content){
return send(subject,content,null);
}

public boolean send(String subject){
return send(subject,null);
}

private void doAttachFile(Multipart container, List<String> fileNames) throws MessagingException{
if(fileNames==null || fileNames.size()==0)
return;
for(String filename:fileNames){
File f = new File(filename);
if(!f.isFile())
continue;
System.out.println("the attach file is:"+filename);
MimeBodyPart fileBodyPart = new MimeBodyPart();
FileDataSource fds = new FileDataSource(f);// 要发送的附件地址
fileBodyPart.setDataHandler(new DataHandler(fds));
fileBodyPart.setFileName(fds.getName());// 设置附件的名称
container.addBodyPart(fileBodyPart);
}
}

private InternetAddress[] getReceiverList() throws AddressException
{
ArrayList<InternetAddress> toList = new ArrayList<InternetAddress>();
for (int i = 0; i < receiver.length; ++i)
{
if (receiver[i].matches(MAIL_ADDRESS_REGEX))
{
toList.add(new InternetAddress(receiver[i]));
}
}

return (InternetAddress[]) toList.toArray(new InternetAddress[toList.size()]);
}
}

使用举例

String host = "168.xx.xx.xx"; //邮件服务器的地址
String subject = "发送邮件的主题";
String sender = "test@gmail.com";
List<String> receivers = new ArrayList<String>();
receivers.add("user1@263.com");
receivers.add("user2@263.com");
String content = "邮件主题";
SendMail sendMail = new SendMail();
sendMail.setMailBasicInfo(host, sender, receivers);
sendMail.send(subject, content, null); //没有附件

正文也可以是html内容，如
String content = "<html>详细信息：<a href='xxxx'>请点击查看！</a></html>";

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