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JSP發送電子郵件Email

要使用JSP發送郵件是很簡單的,需要在您的機器上安裝JavaMail API和Java激活框架(JAF)。

  • 您可以從Java標準網站上下載的JavaMail(版本1.2)的最新版本。

  • 您可以從Java的標準的網站下載JavaBeans激活框架JAF(版本1.0.2)的最新版本。

下載並解壓縮這些文件,在新創建的頂層目錄,你會發現一些jar文件同時為應用。你需要添加了mail.jar和activation.jar文件的文件在你的CLASSPATH中。

發送一個簡單的電子郵件:

下麵是一個例子,從你的機器發送一個簡單的電子郵件。這裡假設你的本地主機連接到互聯網,並有足夠的能力來發送電子郵件。同時要確保從Java電子郵件API包和CLASSPATH中可用JAF包ARA的所有jar文件。

<%@ page import="java.io.*,java.util.*,javax.mail.*"%>
<%@ page import="javax.mail.internet.*,javax.activation.*"%>
<%@ page import="javax.servlet.http.*,javax.servlet.*" %>
<%
   String result;
   // Recipient's email ID needs to be mentioned.
   String to = "abcd@gmail.com";

   // Sender's email ID needs to be mentioned
   String from = "mcmohd@gmail.com";

   // Assuming you are sending email from localhost
   String host = "localhost";

   // Get system properties object
   Properties properties = System.getProperties();

   // Setup mail server
   properties.setProperty("mail.smtp.host", host);

   // Get the default Session object.
   Session mailSession = Session.getDefaultInstance(properties);

   try{
      // Create a default MimeMessage object.
      MimeMessage message = new MimeMessage(mailSession);
      // Set From: header field of the header.
      message.setFrom(new InternetAddress(from));
      // Set To: header field of the header.
      message.addRecipient(Message.RecipientType.TO,
                               new InternetAddress(to));
      // Set Subject: header field
      message.setSubject("This is the Subject Line!");
      // Now set the actual message
      message.setText("This is actual message");
      // Send message
      Transport.send(message);
      result = "Sent message successfully....";
   }catch (MessagingException mex) {
      mex.printStackTrace();
      result = "Error: unable to send message....";
   }
%>
<html>
<head>
<title>Send Email using JSP</title>
</head>
<body>
<center>
<h1>Send Email using JSP</h1>
</center>
<p align="center">
<% 
   out.println("Result: " + result + "
");
%>
</p>
</body>
</html>

現在,讓我們把上麵的代碼寫到SendEmail.jsp文件,並使用URL http://localhost:8080/SendEmail.jsp調用這個JSP這將發送一封電子郵件到指定的電子郵件ID abcd@gmail.comand會顯示以下回應:

Send Email using JSP

Result: Sent message successfully....

如果您想發送電子郵件給多個收件人,然後下麵的方法將被用來指定多個電子郵件ID:

void addRecipients(Message.RecipientType type, 
                   Address[] addresses)
throws MessagingException

這裡的參數的說明:

  • type: 這將被設定為TO,CC或BCC。在這裡,CC代表抄送和密件抄送代表黑碳複製。例如Message.RecipientType.TO

  • addresses: 這是電子郵件的ID的數組。需要使用 InternetAddress()方法,同時指定電子郵件ID。

發送HTML Email:

下麵是一個例子,從機器發送的HTML電子郵件。這裡假設你的本地主機連接到互聯網,並有足夠的能力來發送電子郵件。同時要確保從Java電子郵件API包和CLASSPATH中可用JAF包ARA的所有jar文件。

這個例子非常相似,前一個,除了在這裡我們使用的是使用setContent()方法來設置內容的第二個參數為“text / html類型”指定的HTML內容被包含在消息中。

通過這個例子,可以發送你喜歡HTML內容。

<%@ page import="java.io.*,java.util.*,javax.mail.*"%>
<%@ page import="javax.mail.internet.*,javax.activation.*"%>
<%@ page import="javax.servlet.http.*,javax.servlet.*" %>
<%
   String result;
   // Recipient's email ID needs to be mentioned.
   String to = "abcd@gmail.com";

   // Sender's email ID needs to be mentioned
   String from = "mcmohd@gmail.com";

   // Assuming you are sending email from localhost
   String host = "localhost";

   // Get system properties object
   Properties properties = System.getProperties();

   // Setup mail server
   properties.setProperty("mail.smtp.host", host);

   // Get the default Session object.
   Session mailSession = Session.getDefaultInstance(properties);

   try{
      // Create a default MimeMessage object.
      MimeMessage message = new MimeMessage(mailSession);
      // Set From: header field of the header.
      message.setFrom(new InternetAddress(from));
      // Set To: header field of the header.
      message.addRecipient(Message.RecipientType.TO,
                               new InternetAddress(to));
      // Set Subject: header field
      message.setSubject("This is the Subject Line!");
     
      // Send the actual HTML message, as big as you like
      message.setContent("<h1>This is actual message</h1>",
                            "text/html" );
      // Send message
      Transport.send(message);
      result = "Sent message successfully....";
   }catch (MessagingException mex) {
      mex.printStackTrace();
      result = "Error: unable to send message....";
   }
%>
<html>
<head>
<title>Send HTML Email using JSP</title>
</head>
<body>
<center>
<h1>Send Email using JSP</h1>
</center>
<p align="center">
<% 
   out.println("Result: " + result + "
");
%>
</p>
</body>
</html>

現在,嘗試使用上麵的JSP在給定的電子郵件ID發送HTML格式的郵件。

發送附件的電子郵件:

下麵是一個例子與附件從你的機器發送電子郵件:

<%@ page import="java.io.*,java.util.*,javax.mail.*"%>
<%@ page import="javax.mail.internet.*,javax.activation.*"%>
<%@ page import="javax.servlet.http.*,javax.servlet.*" %>
<%
   String result;
   // Recipient's email ID needs to be mentioned.
   String to = "abcd@gmail.com";

   // Sender's email ID needs to be mentioned
   String from = "mcmohd@gmail.com";

   // Assuming you are sending email from localhost
   String host = "localhost";

   // Get system properties object
   Properties properties = System.getProperties();

   // Setup mail server
   properties.setProperty("mail.smtp.host", host);

   // Get the default Session object.
   Session mailSession = Session.getDefaultInstance(properties);

   try{
      // Create a default MimeMessage object.
      MimeMessage message = new MimeMessage(mailSession);

      // Set From: header field of the header.
      message.setFrom(new InternetAddress(from));

      // Set To: header field of the header.
      message.addRecipient(Message.RecipientType.TO,
                               new InternetAddress(to));

      // Set Subject: header field
      message.setSubject("This is the Subject Line!");

      // Create the message part 
      BodyPart messageBodyPart = new MimeBodyPart();

      // Fill the message
      messageBodyPart.setText("This is message body");
      
      // Create a multipar message
      Multipart multipart = new MimeMultipart();

      // Set text message part
      multipart.addBodyPart(messageBodyPart);

      // Part two is attachment
      messageBodyPart = new MimeBodyPart();
      String filename = "file.txt";
      DataSource source = new FileDataSource(filename);
      messageBodyPart.setDataHandler(new DataHandler(source));
      messageBodyPart.setFileName(filename);
      multipart.addBodyPart(messageBodyPart);

      // Send the complete message parts
      message.setContent(multipart );

      // Send message
      Transport.send(message);
      String title = "Send Email";
      result = "Sent message successfully....";
   }catch (MessagingException mex) {
      mex.printStackTrace();
      result = "Error: unable to send message....";
   }
%>
<html>
<head>
<title>Send Attachement Email using JSP</title>
</head>
<body>
<center>
<h1>Send Attachement Email using JSP</h1>
</center>
<p align="center">
<% 
   out.println("Result: " + result + "
");
%>
</p>
</body>
</html>

現在試著上麵的JSP運行到一個文件作為附件發送以及在給定的電子郵件ID的消息。

用戶認證部分:

如果需要提供用戶ID和密碼的電子郵件服務器進行身份驗證的目的,那麼你可以按如下方法設置這些屬性:

 props.setProperty("mail.user", "myuser");
 props.setProperty("mail.password", "mypwd");

郵件發送機製的其餘部分將繼續如上麵所述。

使用表單發送電子郵件:

您可以使用HTML表單接受電子郵件參數,然後你可以使用request對象如下,讓所有的信息:

String to = request.getParameter("to");
String from = request.getParameter("from");
String subject = request.getParameter("subject");
String messageText = request.getParameter("body");

一旦你把所有的信息設置完成,就可以使用上麵提到的程序來發送電子郵件。