JSP页面发送简单邮件的代码

 
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@page import="java.util.*"%>
<%@page import="javax.mail.*"%>
<%@page import="javax.mail.internet.*"%>
<%!class SmtpAuth extends javax.mail.Authenticator {
    private String username, password;
    public SmtpAuth(String username, String password) {
      this.username = username;
      this.password = password;
    }
    @Override
    protected javax.mail.PasswordAuthentication getPasswordAuthentication() {
      return new javax.mail.PasswordAuthentication(username, password);
    }
  }%>
<%
  if ("POST".equals(request.getMethod())) {
    String smtpServer = "xxxx.net"; // 修改为你的邮件服务器的地址
    int smtpServerPort = 25; // 端口，一般都是25
    boolean ifAuth = true;// 服务器需要身份认证，如果不需要认证，则后面的用户名和密码就不需要了
    String username = "xxxx@xxxx.net"; // 外发邮件的话，需要用户名
    String password = ""; // 密码
    String from = "xxxxx@xxxx.net"; // 发信人的邮件地址
    String displayName = "老紫竹"; // 发信人的称呼

    request.setCharacterEncoding("UTF-8");
    HashMap<String, String> map = new HashMap<String, String>();
    map.put("state", "success");
    String message = "邮件发送成功！";
    Session emailSession = null;
    Properties props = System.getProperties();
    props.put("mail.smtp.host", smtpServer);
    props.put("mail.smtp.port", smtpServerPort);

    String to = request.getParameter("to");
    String subject = request.getParameter("subject");
    String content = request.getParameter("content");
    String contentType = "text/plain";
    String charset = "UTF-8";
    try {
      if (ifAuth) {
        props.put("mail.smtp.auth", "true");
        SmtpAuth smtpAuth = new SmtpAuth(username, password);
        emailSession = javax.mail.Session.getInstance(props, smtpAuth);
      } else {
        props.put("mail.smtp.auth", "false");
        emailSession = javax.mail.Session.getDefaultInstance(props, null);
      }
      emailSession.setDebug(false);
      Transport trans = null;
      Message msg = new MimeMessage(emailSession);
      try {
        Address from_address = new InternetAddress(from, displayName);
        msg.setFrom(from_address);
      } catch (java.io.UnsupportedEncodingException e) {
        e.printStackTrace();
      }
      InternetAddress[] address = { new InternetAddress(to) };
      msg.setRecipients(Message.RecipientType.TO, address);
      msg.setSubject(subject);
      Multipart mp = new MimeMultipart();
      MimeBodyPart mbp = new MimeBodyPart();
      mbp.setContent(content.toString(), contentType + ";charset=" + charset);
      mp.addBodyPart(mbp);
      msg.setContent(mp); // Multipart加入到信件
      msg.setSentDate(new Date()); // 设置信件头的发送日期
      // 发送信件
      msg.saveChanges();
      trans = emailSession.getTransport("smtp");
      trans.connect(smtpServer, username, password);
      trans.sendMessage(msg, msg.getAllRecipients());
      trans.close();
    } catch (AuthenticationFailedException e) {
      map.put("state", "failed");
      message = "邮件发送失败！错误原因：\n" + "身份验证错误!";
      e.printStackTrace();
    } catch (MessagingException e) {
      message = "邮件发送失败！错误原因：\n" + e.getMessage();
      map.put("state", "failed");
      e.printStackTrace();
      Exception ex = null;
      if ((ex = e.getNextException()) != null) {
        System.out.println(ex.toString());
        ex.printStackTrace();
      }
    }
    out.println("\n提示信息:" + message);
  }
%>
<form method="post">
<table>
  <tr>
    <td>收件人：</td>
    <td><input type="text" name="to" size="70" /></td>
  </tr>
  <tr>
    <td>标题：</td>
    <td><input type="text" name="subject" size="70" /></td>
  </tr>
  <tr>
    <td>内容：</td>
    <td><textarea name="content" cols="60" rows="10"></textarea></td>
  </tr>
  <tr>
    <td colspan="2"><input type="submit" /></td>
  </tr>
</table>
</form>