Fetching Java variable from JSP into Script tag

Question

I am writing a JSP and have the Java code written in the <code> tags.

I would like to use a Java variable which is inside the <code> tag, inside the script tag.

Example:-

  <html>
    <head>
    var myJSVar = $(myJavaVariable)//Something like this and this doesn't work
    </head>
    <body>
    <pre>
    <code>
     String myJavaVariable = "Sample String";
    </code>
    .....

Thanks!!!!

Possible duplicate of [java variable in a jsp tag?](http://stackoverflow.com/questions/5121954/java-variable-in-a-jsp-tag) — Tony, Apr 26 '16 at 09:58

score 2 · Answer 1 · answered Apr 26 '16 at 10:26

2

First you have to declare , <% String myJavaVariable = "Sample String"; %>

Then in script, var myJSVar = "<%=myJavaVariable%>";

answered Apr 26 '16 at 10:26

Dominic Philip

108
2
10

Priyamal · Answer 2 · 2016-04-26T12:25:09.353

Its not possible to get java variable inside a script. you can set the values in to a HTML element using java after you have done that you can use <script> tag to access the values which is in HTML element

    <% String Name="myName"; %>
    <input type="text" name="Name" id="Name"  value="<%=Name%>" maxlength="50" />

using script tag to get the data in html element.

<script>              
    var name = document.getElementById('Name').value;
    <script>

<code> is not a tag used in HTML to write java code. so you cant do any coding inside a code tag anything you will write in there will be just interpreted on browser in the format of a code.

changed the answer according to your comments.example on getting values as a json and converting them to java objects

  String json = "{\"Name\":\"priyamal\",\"Mob\":\"077045\"}";
    ObjectMapper mapperobject = new ObjectMapper();
    Map<String, Object> javaobj = mapperobject.readValue(json, new TypeReference<Map<String,Object>>() { });
    out.println("MyName:" + javaobj.get("Name") + "Mobile:" + javaobj.get("Mob"));

Actually I have a Json object like jsonPrettyPrintString it will display the json data on browser. I need a tree structure of ui on browser but it's simply displaying plain json code. — user3649158, Apr 26 '16 at 11:03
first of all you should to know how to ask a question properly.you have never mention anything related to getting values from as a json string. wait i'll update my answer. — Priyamal, Apr 26 '16 at 12:18

score 0 · Answer 3 · edited Apr 26 '16 at 10:49

0

There are two ways to use java variable on jsp

${message}
<%String myVar="blabla";%>

Hope this is useful for you.

edited Apr 26 '16 at 10:49

Sampada

2,931
7
27
39

answered Apr 26 '16 at 10:31

ankit singh

153
1
5

Fetching Java variable from JSP into Script tag

3 Answers3