Of Stack

JavaMail implements the method of mail delivery

  • 2020-04-01 03:48:36
  • OfStack

This article illustrates an example of how JavaMail implements mail delivery. Share with you for your reference. The details are as follows:

Download the activation.jar and mail.jar
Configure the CLASSPATH and add the above two jars to the CLASSPATH.

Javabeans: "SendEmail. Java" 


package cls; 
import java.util.Date; 
import java.util.Properties; 
import javax.mail.*; 
import javax.mail.internet.*; 
public class SendEmail 
{ 
 String host; 
 String username; 
 String password; 
 String fromAddr; 
 String toAddr; 
 String subject; 
 String content; 
 public SendEmail() 
 { 
 //Variable initialization
 host = "smtp.qq.com"; 
 username = ""; 
 password = ""; 
 fromAddr = "@"; 
 } 
 //Send E-mail
 public boolean sendMail() 
 { 
 Properties prop; 
 Session session; 
 MimeMessage msg; 
 try 
 { 
  prop = new Properties(); //Memory connection parameter
  prop.put("mail.smtp.host",host); 
  prop.put("mail.smtp.auth","true"); 
  session = Session.getDefaultInstance(prop,null);
  //Get an email Session
  msg = new MimeMessage(session); //Email messages
  //Check that the email address is valid
  if(fromAddr == null || fromAddr.equals("")) 
  { 
  throw new Exception(" Sending address error "); 
  } 
  if(toAddr == null || toAddr.equals("")) 
  { 
  throw new Exception(" Target address error "); 
  } 
  //Set the source address
  msg.setFrom(new InternetAddress(fromAddr)); 
  //Set destination address
  msg.setRecipient(Message.RecipientType.TO,new InternetAddress(toAddr)); 
  //Set the theme
  msg.setSubject(subject); 
  Multipart mp = new MimeMultipart(); //Email content
  MimeBodyPart mbpContent = new MimeBodyPart(); 
  mbpContent.setContent(content,"text/html"); //Mail format
  mp.addBodyPart(mbpContent); 
  msg.setContent(mp); 
  msg.setSentDate(new Date()); 
  //Send E-mail
  Transport transport = session.getTransport("smtp"); 
  transport.connect((String)prop.get("mail.smtp.host"),username,password); 
  transport.sendMessage(msg,msg.getRecipients(MimeMessage.RecipientType.TO)); 
  transport.close(); 
  return true; 
 } 
 catch(Exception e) 
 { 
  System.out.println(e); 
  return false; 
 } 
 } 
 // getter and setter 
 public String getPassword() 
 { 
 return password; 
 } 
 public void setPassword(String password) 
 { 
 this.password = password; 
 } 
 public String getHost() 
 { 
 return host; 
 } 
 public void setHost(String host) 
 { 
 this.host = host; 
 } 
 public String getUsername() 
 { 
 return username; 
 } 
 public void setUsername(String username) 
 { 
 this.username = username; 
 } 
 public String getFromAddr() 
 { 
 return this.fromAddr; 
 } 
 public void setFromAddr(String addr) 
 { 
 fromAddr = addr; 
 } 
 public String getToAddr() 
 { 
 return this.toAddr; 
 } 
 public void setToAddr(String addr) 
 { 
 toAddr = addr; 
 } 
 public String getSubject() 
 { 
 return subject; 
 } 
 public void setSubject(String sub) 
 { 
 subject = sub; 
 } 
 public String getContent() 
 { 
 return content; 
 } 
 public void setContent(String content) 
 { 
 this.content = content; 
 } 
}

The sendmail. JSP: 


<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
"http://www.w3.org/TR/html4/loose.dtd"> 
<html> 
 <head> 
 <title>Mail</title> 
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 </head> 
 <body> 
 <center> 
  <jsp:useBean id="email" class="cls.SendEmail" scope="page" /> 
  <jsp:setProperty name="email" property="toAddr" value="host" />
  <jsp:setProperty name="email" property="fromAddr" value="host" />
  <jsp:setProperty name="email" property="username" value="username" />
  <jsp:setProperty name="email" property="password" value="password" />
  <jsp:setProperty name="email" property="subject" value="mail test" />
  <jsp:setProperty name="email" property="content" value="hello world"/>
  <%=email.sendMail() %>
 </center> 
 </body> 
</html>

I hope this article has been helpful to your Java programming.

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