如何在jsp页面中将javascript值赋给jsp变量

Question

I have a text field, I need to send these text value to the same page which is in jsp .

I just want to assign javascript value to jsp variable.

Answer 1

You can't. JSP runs on the server, Javascript runs on the client, so when Javascript runs the JSP variable doesnt exist anymore.

Consider using AJAX .

Answer 2

You could set a hidden field.

Put this in your JSP form:

<input type="hidden" id="foo" name="foo" />

Execute this script whenever you want to fill the field:

document.getElementById("foo").value = "some value";

When you submit the form, it'll be available as follows in the servlet:

String foo = request.getParameter("foo"); // "some value"
// ...

See also:

• Communication between Java/JSP/JSF and JavaScript