Calling method onClick of Jsp form Jsp
I wish to call a method in JSP onClick, the method is on the same JSP inside scriptlet.
How should I archive this?
<%@ page import="java.io.*,java.lang.*,java.util.*,java.net.*,java.util.*,java.text.*"%>
<%@ page import="javax.activation.*,javax.mail.*,org.apache.commons.*"%>
<%@ page import="javax.servlet.http.*,javax.servlet.*"%>
<%!
public String sendMail(String to, String sub, String msg) {
String res = null;
System.out.println("HI");
return res;
}%>
<html>
<head>
<title>Send Email using JSP</title>
</head>
<body>
<center>
<h1>Send Email using JSP</h1>
</center>
<form>
<label>Email To</label><br />
<input type="text" name="to" /><br />
<label>Subject</label><br />
<input type="text" name="sub" /><br />
<label for="body">Message</label><br />
<input type="text" name="msg" /><br />
<input type="submit" onClick="sendMail( to, sub, msg )"/>
</form>
</body>
</html>
Note
The methods name is "sendMail", It's called on submit button I want to do the whole code in JSP only.
Answer
The
onclickevent occurs when the user clicks on an element. This attribute has the ability to call JS functions (front end)
In your case, you want to call a JAVA function (server side) so the best way is to move the java code to a servlet and use it.
Anyway if you want to keep the JAVA function in the jsp, you can do this via ajax in this way
<script type="text/javascript">
$(document).ready(function() {
$('#sendMailBtn').click(function (){
$.ajax({
type: "post",
url: "/path",
data: "email=" + $('#email').val() + "&subject="+$('#subject').val() + "&msg=" + $('#msg').val(),
success: function(msg){
//
}
});
});
});
</script>
AJAX is a developer's dream, because you can
Update a web page without reloading the page Request data from a server - after the page has loaded Receive data from a server - after the page has loaded Send data to a server - in the background
Check the full code here
<%@ page import="java.io.*,java.lang.*,java.util.*,java.net.*,java.util.*,java.text.*"%>
<%@ page import="javax.activation.*,javax.mail.*,org.apache.commons.*"%>
<%@ page import="javax.servlet.http.*,javax.servlet.*"%>
<%!
public String sendMail(String to, String sub, String msg) {
String res = null;
System.out.println("HI");
return res;
}
%>
<html>
<head>
<title>Send Email using JSP</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js"></script>
</head>
<body>
<center>
<h1>Send Email using JSP</h1>
</center>
<form>
<label>Email To</label><br />
<input id="email" type="text" name="to" /><br />
<label>Subject</label><br />
<input id="subject" type="text" name="sub" /><br />
<label for="body">Message</label><br />
<input id="msg" type="text" name="msg" /><br />
<input id="sendMailBtn" type="submit" />
</form>
</body>
<script type="text/javascript">
$(document).ready(function() {
$('#sendMailBtn').click(function (){
$.ajax({
type: "post",
url: "/path",
data: "email=" + $('#email').val() + "&subject="+$('#subject').val() + "&msg=" + $('#msg').val(),
success: function(msg){
//
}
});
});
});
</script>
</html>
For more information check