| 一：条件 必须下载sun公司的JavaMail API包，地址为：http://java.sun.com/products/javamail/ 我这里用的是1.2版本，将相关包(jar文件)加到CLASSPATH中 二：该程序非常简单，不需要我们考虑很多地层的东西，因为API都帮我们做好了这些事情，下面是一个简单的发邮件的Servlet：(对于熟悉的人来说，恐怕是再简单不过了的一个servlet)
import java.io.*; import javax.servlet.*; import javax.servlet.http.*; import sun.net.smtp.*; public class SendMailServlet extends HttpServlet { public static String MAIL_FROM = "from"; public static String MAIL_TO = "to"; public static String MAIL_SUBJECT = "subject"; public static String MAIL_BODY = "body"; public static String MAIL_HOST = "mailhost"; public void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { resp.setContentType("text/html; charset=gb2312"); PrintWriter out = resp.getWriter(); out.println("<form method=POST action=\"" + req.getRequestURI() + "\">"); out.println("<table>"); out.println("<tr><td>send mail server:</td>"); out.println("<td><input type=text name=" + MAIL_HOST + " size=30></td></tr>"); out.println("<tr><td>from:</td>"); out.println("<td><input type=text name=" + MAIL_FROM + " size=30></td></tr>"); out.println("<tr><td>to:</td>"); out.println("<td><input type=text name=" + MAIL_TO + " size=30></td></tr>"); out.println("<tr><td>subject:</td>"); out.println("<td><input type=text name=" + MAIL_SUBJECT + " size=30></td></tr>"); out.println("<tr><td>text:</td>"); out.println("<td><textarea name=" + MAIL_BODY + " cols=40 rows=10></textarea></td></tr>"); out.println("</table><br>"); out.println("<input type=submit value=\"Send\">"); out.println("<input type=reset value=\"Reset\">"); out.println("</form>"); out.flush(); } public void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException,IOException { resp.setContentType("text/html; charset=gb2312"); PrintWriter out = new PrintWriter(resp.getOutputStream()); String from = req.getParameter(MAIL_FROM); String to = req.getParameter(MAIL_TO); String subject = req.getParameter(MAIL_SUBJECT); String body = req.getParameter(MAIL_BODY); String mailhost = req.getParameter(MAIL_HOST); try { SmtpClient mailer = new SmtpClient(mailhost); mailer.from(from); mailer.to(to); PrintStream ps = mailer.startMessage(); ps.println("From: " + from); ps.println("To: " + to); ps.println("Subject: " + subject); ps.println(body); mailer.closeServer(); out.println("Success!"); } catch (Exception ex) { out.println("An error about:" + ex.getMessage()); } out.flush(); } public void init(ServletConfig cfg) throws ServletException { super.init(cfg); } public void destroy() { super.destroy(); } } |
