javaMail发送邮件实例

Mailer类的说明:

具有两个构造函数

Mailer() 读取properties文件的数据配置javamail的发送属性

Mailer(String mail_host, String stmp_port, String template_file_path, String send_from, String pw, String charset) 使用参数配置javamail的发送属性

sendMail()发送邮件主函数

getTemplate()从服务器指定路径读取以存文件作为发送邮件的content

环境配置说明：

必须引入的两个开发包：mail.jar activation.jar

可能出现的错误说明：

缺少activation.jar系统会报Exception in thread "Thread-1" java.lang.NoClassDefFoundError: javax/activation/DataSource异常

在用户名和密码都没有问题的情况下，如果代码抛出javax.mail.AuthenticationFailedException异常，先用OutLook测试一下看能否进行正常的收发邮件，有时信箱如果是新注册的话，邮件的服务商默认刚注册的帐号是不能使用pop3的。例如126.com在我进行代码测试时，刚刚注册的帐号是没有权限使用该功能的，所以就会抛出上述的异常。
还有，要注意from的email地址和Authenticator类中验证的用户名是一致的，要不也会出错

Mailer.java




/**//*---------Operating instructions----edit by lynn at 20080319


* Make a JSP file like this:


* <%@ page import="mailer.*"%>


<%


Mailer mailer = new Mailer();


//In Mailer class,you can use a template file for the mail content by the method of getTemplate().


String content = Mailer.getTemplate("MemberApplyFirst.txt");




mailer.sendMail("yehell@hotmail.com", "test", content ,"VOGUE");




Mailer mail = new Mailer("gmail-smtp.l.google.com","25","E://test//","lynn.yehell@gmail.com","password","utf-8");


mail.sendMail("yehell@hotmail.com", "test", content ,"VOGUE");


%>


*/


package mailer;




import java.io.BufferedReader;


import java.io.File;


import java.io.FileInputStream;


import java.io.FileNotFoundException;


import java.io.IOException;


import java.io.InputStreamReader;


import java.util.ArrayList;


import java.util.Date;


import java.util.HashMap;


import java.util.Properties;


import java.util.ResourceBundle;




import javax.mail.Authenticator;


import javax.mail.Message;


import javax.mail.MessagingException;


import javax.mail.PasswordAuthentication;


import javax.mail.Session;


import javax.mail.Transport;


import javax.mail.internet.AddressException;


import javax.mail.internet.InternetAddress;


import javax.mail.internet.MimeMessage;






public class Mailer ...{


private static ResourceBundle bundle;




private static String TEMPLATE_FILE_PATH;




private static String MAIL_HOST;




private static String SMTP_PORT;




private static String USER_NAME;




private static String USER_PASSWORD;




private static String SEND_FROM;




private static String MAIL_CHARSET;




private Properties props;




private Session session;




private MimeMessage msg;




private static HashMap templates;






public Mailer() ...{


super();


//Get the data of properties file




try ...{




if (bundle == null) ...{


bundle = ResourceBundle.getBundle("mail_config");


TEMPLATE_FILE_PATH = bundle.getString("TEMPLATE_FILE_PATH");


MAIL_HOST = bundle.getString("MAIL_HOST");


SMTP_PORT = bundle.getString("SMTP_PORT");


USER_NAME = bundle.getString("USER_NAME");


USER_PASSWORD = bundle.getString("USER_PASSWORD");


SEND_FROM = bundle.getString("SEND_FROM");


MAIL_CHARSET = bundle.getString("MAIL_CHARSET");


}




} catch (Exception e) ...{


e.printStackTrace();


}


bundle = null;




// Get a Properties object


this.props = System.getProperties();


props.setProperty("mail.smtp.host", MAIL_HOST );


props.setProperty("mail.smtp.port", SMTP_PORT );


props.setProperty("mail.smtp.socketFactory.port", SMTP_PORT );


props.put("mail.smtp.socketFactory.fallback", "true" );


props.put("mail.transport.protocol", "smtp" );


props.put("mail.smtp.starttls.enable", "true" );


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


// props.put("mail.smtp.socketFactory.class", "javax.net.SocketFactory");






this.session = Session.getInstance(props, new Authenticator() ...{




protected PasswordAuthentication getPasswordAuthentication() ...{


return new PasswordAuthentication(USER_NAME, USER_PASSWORD);


}


});


//this.session.setDebug(true);


this.msg = new MimeMessage(session);


}




public Mailer(String mail_host, String stmp_port, String template_file_path, String send_from, String pw, String charset) ...{


super();




TEMPLATE_FILE_PATH = template_file_path;


SEND_FROM = send_from;


USER_NAME = send_from;


USER_PASSWORD = pw;


MAIL_CHARSET = charset;




// Get a Properties object


this.props = System.getProperties();


props.setProperty("mail.smtp.host", mail_host );


props.setProperty("mail.smtp.port", stmp_port );


props.setProperty("mail.smtp.socketFactory.port", stmp_port );


props.put("mail.smtp.socketFactory.fallback", "true" );


props.put("mail.transport.protocol", "smtp" );


props.put("mail.smtp.starttls.enable", "true" );


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


// props.put("mail.smtp.socketFactory.class", "javax.net.SocketFactory");






this.session = Session.getInstance(props, new Authenticator() ...{




protected PasswordAuthentication getPasswordAuthentication() ...{


return new PasswordAuthentication(USER_NAME, USER_PASSWORD);


}


});


this.session.setDebug(true);


this.msg = new MimeMessage(session);


}






public void sendMail(String to, String title, String content, String site)throws Exception ...{




try ...{


msg.setFrom(new InternetAddress(SEND_FROM , SEND_FROM.substring(0,SEND_FROM.indexOf("@"))));


msg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to, false));


msg.setSubject(title, MAIL_CHARSET );


msg.setText(content);


msg.setSentDate(new Date());


Transport.send(msg);




} catch (AddressException e) ...{


// TODO Auto-generated catch block


e.printStackTrace();


throw new Exception(e);




} catch (MessagingException e) ...{


// TODO Auto-generated catch block


e.printStackTrace();


throw new Exception(e);




} catch (Exception e) ...{


// TODO Auto-generated catch block


e.printStackTrace();


throw new Exception(e);


}


}






public static String getMailContent(String template, ArrayList params) ...{


String strReturn = template;




for (int i = params.size(); i > 0; i--) ...{


strReturn = strReturn.replaceAll("%" + (i), params.get(i - 1).toString());


}


return strReturn;


}






public static String getTemplate(String fileName) throws Exception ...{




if (templates == null) ...{


templates = new HashMap();


}




if (templates.get(fileName) != null) ...{


return templates.get(fileName).toString();




} else ...{


String filepath = TEMPLATE_FILE_PATH + fileName;


File file = new File(filepath);


String returnStr = "";




if (file.isFile()) ...{




try ...{


InputStreamReader read = new InputStreamReader(new FileInputStream(file), MAIL_CHARSET);




BufferedReader bReader = new BufferedReader(read);




String line;






while ((line = bReader.readLine()) != null) ...{


returnStr += line;


returnStr += " ";


}




} catch (FileNotFoundException e) ...{


e.printStackTrace();


throw new Exception(e);




} catch (IOException e) ...{


e.printStackTrace();


throw new Exception(e);


}


templates.put(fileName, returnStr);


}


return returnStr;


}


}


}



mail_config.properties 文件（该文件必须放在classes目录下才能被读取）


TEMPLATE_FILE_PATH = E://test//


MAIL_HOST = gmail-smtp.l.google.com


SMTP_PORT = 25


MAIL_CHARSET = SHIFT-JIS




USER_NAME = guofeng.matest@gmail.com


USER_PASSWORD = maguofeng1


SEND_FROM = guofeng.matest@gmail.com