I am new to Java. I have a HTML which has a show users button, on clicking this button I want to redirect the user to the users.jsp page. How do I achieve that? Will a function like this help?
function msg()
{
alert("List of Users");<br/>
jsp:forward page="Users.jsp"<br/>
}
Java and JavaScript are two entirely distinct languages which runs each on its own environment. Java/JSP runs at the webserver machine, produces template text including HTML/CSS/JS and sends it over network to the client side as a HTTP response. Once arrived at the client machine, the webbrowser starts to display HTML, apply CSS and interpret/execute JS. If Java/JSP has done its job well, you should not see any line of Java/JSP code in the obtained HTML source (rightclick page > View Source).
The only way to let Java/JSP do something with JavaScript is to generate/print it accordingly that it get interpreted/executed in the client side the way you want. The only way to let JavaScript do something with Java/JSP code is to let it fire a HTTP request to an URL on which a JSP file or a Java Servlet listens and then exectues accordingly. You can fire a HTTP request with form.submit(), window.location and new XMLHttpRequest() (which is the base idea of Ajax).
In your particular case, you can just use window.location:
function msg() {
alert('List of Users');
window.location = 'Users.jsp';
}
or if this button is part of a <form>, then just specify it in the form action:
<form action="Users.jsp" onclick="msg()">
<input type="submit">
</form>
with
function msg() {
alert('List of Users');
}
To learn more about the wall between Java/JSP and JavaScript, you may find this article useful. As to learning Web Development in general, you may find this answer useful and for Java Web Development this answer.
=) first thing to learn: java != javascript
anyway, here's a nice function for you
function msg() {
alert("List of Users");
location.href = "users.jsp";
}
and the accompanying HTML
<button onclick="msg()">Click Me!</button>
good luck
===edit===
Full HTML page:
<html>
<head><title>Hi</title></head>
<body>
<script>
function msg() {
alert("List of Users");
location.href = "users.jsp";
}
</script>
<button onclick="msg()">Click Me!</button>
</body>
</html>
Essentially, if you print that ^ out in your servelet, you will get the desired result.
If you are more comfortable with Java than Javascript, perhaps Google Web Toolkit would be a desirable option.
You cannot embed JSP in JavaScript, because JavaScript is ran by the browser, and browser does not implement JSP.
Try window.location = "Users.jsp"; in JavaScript.
