以下内容引用自http://wiki.jikexueyuan.com/project/jsp/sending-email.html：
发送一个简单的电子邮件
给出一个简单的例子，从机器上发送一个简单的邮件。假设本地主机连接到互联网，能够足以发送一封电子邮件。
<%@ 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 = "[email protected]";
// Sender‘s email ID needs to be mentioned
String from = "[email protected]";
// 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 + "\n");
%>
</p>
</body>
</html>
现在将上面的代码放在SendEmail.jsp文件，并且使用URL：http://localhost:8080/SendEmail.jsp来调用此JSP，将电子邮件发送到给定的邮箱ID为[email protected]中，显示的响应结果如下所示。
如果想给多个收件人发送邮件，下面的方法可用于发送邮件给指定的多个邮箱IDs：
void addRecipients(Message.RecipientType type, Address[] addresses) throws MessagingException
下面是对参数的描述：
- type：可设置为TO，CC或者BCC。其中，CC表示Carbon Copy，BCC表示Black Carbon Copy。例如，Message.RecipientType.TO。
- addresses：它是邮箱ID的数组。能使用InternetAddress()方法，同时指定邮箱IDs。
发送HTML邮件
这个例子与之前给出的例子非常相似，除了在这个例子中使用setContent()方法设置第二个参数为“text/html”，用来指定网页内容包含在这个信息中。
使用这个例子，可以发送与网页内容一样大的邮件。
<%@ 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 = "[email protected]";
// Sender‘s email ID needs to be mentioned
String from = "[email protected]";
// 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 + "\n");
%>
</p>
</body>
</html>
现在可以使用上述JSP发送网页信息给指定的邮箱ID。
在电子邮件中发送附件：
给定一个例子，从机器上发送一个带附件的邮箱：
<%@ 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 = "[email protected]";
// Sender‘s email ID needs to be mentioned
String from = "[email protected]";
// 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 + "\n");
%>
</p>
</body>
</html>
现在可以运行上述JSP发送一个文件作为信息的附件给指定邮箱ID。
用户身份验证部分
为了身份验证的目的，如果需要提供用户ID和密码给邮箱服务器，可以设置这些属性如下：
props.setProperty("mail.user", "myuser");
props.setProperty("mail.password", "mypwd");
邮件发送机制的设置和上述的解释一致。
用表单发送邮件
可以使用网页表单接受邮件参数，然后可以使用Request对象获得如下的所有信息：
String to = request.getParameter("to");
String from = request.getParameter("from");
String subject = request.getParameter("subject");
String messageText = request.getParameter("body");
测试工程：https://github.com/easonjim/5_java_example/tree/master/jspbasics/test16
时间： 2024-11-06 02:45:46