Servlet發送郵件
阿新 • • 發佈：2017-06-11
nal 收件人 gin ava r文件 this log 發現 例如
以下內容引用自http://wiki.jikexueyuan.com/project/servlet/sending-email.html：
使用Servlet發送一封電子郵件是非常簡單的，但是開始之前必須在計算機上安裝JavaMail API和Java Activation Framework(JAF)。
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可以從Java標準網站下載最新版本的JavaMail版本 1.2
- 可以從Java標準網站下載最新版本的JAF版本 1.1.1
下載並解壓縮這些文件，在新創建的頂級目錄中會發現這兩個應用程序的一些jar文件。需要把mail.jar和activation.jar文件添加到CLASSPATH中。
POM項目添加如下依賴：
<!-- JavaMail Library --> <!-- http://mvnrepository.com/artifact/com.sun.mail/javax.mail --> <dependency> <groupId>com.sun.mail</groupId> <artifactId>javax.mail</artifactId> <version>1.5.6</version> </dependency>
一、發送一封簡單的電子郵件
//File Name SendEmail.java import java.io.*; import java.util.*; import javax.servlet.*; import javax.servlet.http.*; import javax.mail.*; import javax.mail.internet.*; import javax.activation.*; public class SendEmail extendsHttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // 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";// This is SMTP Server,Ex:smtp.163.com // set email username String user = "user"; // set email password String password = "password"; // Get system properties Properties properties = System.getProperties(); // Setup mail server properties.setProperty("mail.smtp.host", host); properties.setProperty("mail.user", user); properties.setProperty("mail.password", password); // Get the default Session object. Session session = Session.getDefaultInstance(properties); // Set response content type response.setContentType("text/html"); PrintWriter out = response.getWriter(); try { // Create a default MimeMessage object. MimeMessage message = new MimeMessage(session); // 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); String title = "Send Email"; String res = "Sent message successfully...."; String docType = "<!doctype html public \"-//w3c//dtd html 4.0 " + "transitional//en\">\n"; out.println(docType + "<html>\n" + "<head><title>" + title + "</title></head>\n" + "<body bgcolor=\"#f0f0f0\">\n" + "<h1 align=\"center\">" + title + "</h1>\n" + "<p align=\"center\">" + res + "</p>\n" + "</body></html>"); } catch (MessagingException mex) { mex.printStackTrace(); } } }
現在編譯上述Servlet並在web.xml文件中創建以下條目：
.... <servlet> <servlet-name>SendEmail</servlet-name> <servlet-class>SendEmail</servlet-class> </servlet> <servlet-mapping> <servlet-name>SendEmail</servlet-name> <url-pattern>/SendEmail</url-pattern> </servlet-mapping> ....
如果想把一封電子郵件發送給多個收件人，那麽使用下面的方法來指定多個電子郵件ID：
void addRecipients(Message.RecipientType type, Address[] addresses) throws MessagingException
這裏是對參數的描述：
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type：這將被設置為TO、CC或BCC。這裏CC代表抄送且BCC代表密件抄送。例如Message.RecipientType.TO。
- addresses：這是電子郵件ID的數組。當指定電子郵件ID時，需要使用InternetAddress()方法。
二、發送一封HTML電子郵件
這個例子與上一個例子非常相似，除了在這裏使用的是setContent()方法來設置內容，它的第二個參數為“text/html”用來指定HTML內容是包含在消息中的。
使用這個實例，可以發送內容大小不限的HTML內容。
//File Name SendEmail.java import java.io.*; import java.util.*; import javax.servlet.*; import javax.servlet.http.*; import javax.mail.*; import javax.mail.internet.*; import javax.activation.*; public class SendEmail1 extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // 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";//This is SMTP Server,Ex:smtp.163.com // set email username String user = "user"; // set email password String password = "password"; // Get system properties Properties properties = System.getProperties(); // Setup mail server properties.setProperty("mail.smtp.host", host); properties.setProperty("mail.user", user); properties.setProperty("mail.password", password); // Get the default Session object. Session session = Session.getDefaultInstance(properties); // Set response content type response.setContentType("text/html"); PrintWriter out = response.getWriter(); try { // Create a default MimeMessage object. MimeMessage message = new MimeMessage(session); // 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); String title = "Send Email"; String res = "Sent message successfully...."; String docType = "<!doctype html public \"-//w3c//dtd html 4.0 " + "transitional//en\">\n"; out.println(docType + "<html>\n" + "<head><title>" + title + "</title></head>\n" + "<body bgcolor=\"#f0f0f0\">\n" + "<h1 align=\"center\">" + title + "</h1>\n" + "<p align=\"center\">" + res + "</p>\n" + "</body></html>"); } catch (MessagingException mex) { mex.printStackTrace(); } } }
現在編譯上述Servlet並在web.xml文件中創建以下條目：
<servlet> <servlet-name>SendEmail</servlet-name> <servlet-class>com.jsoft.testservletbasics.SendEmail1</servlet-class> </servlet> <servlet-mapping> <servlet-name>SendEmail</servlet-name> <url-pattern>/SendEmail</url-pattern> </servlet-mapping>
三、在電子郵件中發送附件
//File Name SendEmail.java import java.io.*; import java.util.*; import javax.servlet.*; import javax.servlet.http.*; import javax.mail.*; import javax.mail.internet.*; import javax.activation.*; public class SendFile extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // 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";// This is SMTP Server,Ex:smtp.163.com // set email username String user = "user"; // set email password String password = "password"; // Get system properties Properties properties = System.getProperties(); // Setup mail server properties.setProperty("mail.smtp.host", host); properties.setProperty("mail.user", user); properties.setProperty("mail.password", password); // Get the default Session object. Session session = Session.getDefaultInstance(properties); // Set response content type response.setContentType("text/html"); PrintWriter out = response.getWriter(); try { // Create a default MimeMessage object. MimeMessage message = new MimeMessage(session); // 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"; String res = "Sent message successfully...."; String docType = "<!doctype html public \"-//w3c//dtd html 4.0 " + "transitional//en\">\n"; out.println(docType + "<html>\n" + "<head><title>" + title + "</title></head>\n" + "<body bgcolor=\"#f0f0f0\">\n" + "<h1 align=\"center\">" + title + "</h1>\n" + "<p align=\"center\">" + res + "</p>\n" + "</body></html>"); } catch (MessagingException mex) { mex.printStackTrace(); } } }
現在編譯上述Servlet並在web.xml文件中創建以下條目：
<servlet> <servlet-name>SendEmail</servlet-name> <servlet-class>com.jsoft.testservletbasics.SendFile</servlet-class> </servlet> <servlet-mapping> <servlet-name>SendEmail</servlet-name> <url-pattern>/SendEmail</url-pattern> </servlet-mapping>
四、用戶身份認證部分
如果需要向電子郵件服務器提供用戶ID和密碼來進行身份認證，那麽可以設置如下所示的屬性：
props.setProperty("mail.user", "myuser");
props.setProperty("mail.password", "mypwd");
電子郵件發送機制的其余部分與上面解釋的一致。
測試工程：https://github.com/easonjim/5_java_example/tree/master/servletbasics/test16
Servlet發送郵件