Top 10 Java/jsp Learning Series (javamail API sends an email to [servlet])

A: condition must download Sun's javamail API package, address: http://java.sun.com/products/javamail/

I use version 1.2 here and add the relevant package (JAR file) to classpath.

II. This program is very simple, and we don't need to consider a lot of ground layer things, because the API has helped us do these things well. Below is a simple e-mail servlet: (for people familiar with it, i'm afraid it's a simple 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 = "";

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 ();

Printstream PS = mailer. startmessage ();

PS. println ("from:" + from );

PS. println ("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 ();

}

}