Java webpage execute script
Question
I am new to Java, please help.
I wrote html page index.jsp that suppose to get value from user and execute a script with that value.
The code is-
<body> <form name="Execute-Java" action=""> <p> <label for="s">IP- </label> <input type="text" name="server" value="xxxx"> </p><br> <input type="submit" value="Execute java" name="Submit"/> </form> </body>
Also wrote a java code, compiled it using javac and ran it using java command-line successfully.
public class SendEmail {
public static void main(String [] args){
String from = "from@from.com";
String to = "to@to.com";
String subject = "Test Subject";
String body_email = "Body test";
String host = "x.x.x.x";
//Get the session object
Properties properties = System.getProperties();
properties.setProperty("mail.smtp.host", host);
Session session = Session.getDefaultInstance(properties);
//compose the message
try{
MimeMessage message = new MimeMessage(session);
message.setFrom(new InternetAddress(from));
message.addRecipient(Message.RecipientType.TO,new InternetAddress(to));
message.setSubject(subject);
message.setText(body_email);
// Send message
Transport.send(message);
System.out.println("message sent successfully....");
}catch (MessagingException mex) {mex.printStackTrace();}
} }
Now i would like the index.jsp page to somehow execute the java code when user click submit using the host value given by the user.
Can it be done and what should i do?
1 answers
solution1
0 2016-05-30 12:40:53
If you want to do some calculations with user input from html (jsp) on server-side you should use Application-Layer protocol from OSI (HTTP, HTTPS fe) .
Approach - using Ajax send http request to Server (java-servlet resource, deployed on Tomcat or another servlet container). Or you may use default behavior of form.submit() .
Make SendEmail class an Servlet extending it from HTTPServlet, implement doPost method(or doGet), set address for servlet.
Set action and method attributes for form.
Submit form.
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