Is it possible to use a Java method in a jsp?

Question

I have a class ManXML that has a method that returns an array of strings String[] : getArrayTemas(). I want to use that output as a variable in the script of my jsp.

 <script>
$(document).ready(function() {
    BindControls();
});

function BindControls() {
    const BD = new ManXML("BaseDados");

    var Temas = BD.getArrayTemas();

    $('#tbTemas').autocomplete({
        source : Temas,
        minLength : 0,
        scroll : true
    }).focus(function() {
        $(this).autocomplete("search", "");
    });
}
 </script>

Are you really trying to call from the JSP? Or from Javascript (which runs in the browser)? https://stackoverflow.com/questions/6649125/calling-java-methods-in-javascript-code — Thilo, Jun 12 '19 at 00:52

score 0 · Answer 1 · answered Jun 11 '19 at 22:15

0

Yes, it's possible.
In my answer, I suppose your getArrayTemas() is a static method.

At first, you have to import your class in the jsp and then you can use your static method:

<%@page import="x.y.z.ManXML"%> 

<%
   String [] arrayTernas = ManXML.getArrayTemas();

%>

Finally you can use your arrayTernas with <%=arrayTernas%> or ${arrayTernas} (if you are using JSTL)

answered Jun 11 '19 at 22:15

harry-potter

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But the class needs the constructor, the string that recieves from parameter – Yunrin 127 Jun 11 '19 at 22:25
I tried something like.... <%@page import="Parte2.ManXML"%> <% ManXMLBD = new ManXML("BaseDados"); String [] arrayTemas = BD.getArrayTemas(); %> – Yunrin 127 Jun 11 '19 at 22:27
As I said, I supposed that your method was static. It's not a good practice creating a new instance in a JSP. Aren't you able to convert your method to a static one? – harry-potter Jun 11 '19 at 22:33
You could also inject an instance to call methods on with `request.setAttribute` from the controller code that dispatched to that JSP (assuming there is one). – Thilo Jun 12 '19 at 00:51
How would I do that? – Yunrin 127 Jun 12 '19 at 07:44
And I cant convert into a static one – Yunrin 127 Jun 12 '19 at 07:49

Is it possible to use a Java method in a jsp?

1 Answers1