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Thread: call a JSP method

  1. 03-25-2010, 06:38 AM #1
    sauravsinha
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    Thumbs down call a JSP method

    how can we call a JSP method within a javascript function?
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  2. 03-25-2010, 08:45 AM #2
    RamyaSivakanth's Avatar
    RamyaSivakanth
    RamyaSivakanth is offline Senior Member
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    Default

    See this below sample code for calling jsp meth in javascript.

    <%!
    String hai()
    {
    return "Iam Ramya";
    }
    %>
    <HTML>
    <HEAD><TITLE> Example of onClick Event Handler</TITLE>
    <SCRIPT LANGUAGE="JavaScript">
    function callJsp(){

    alert("<%= hai()%>");
    }
    </SCRIPT>
    </HEAD>
    <BODY BGCOLOR="FFFFFF" TEXT="000000">

    <form name="myform">
    <INPUT TYPE="button" VALUE="Click Here" onClick="callJsp()">
    </form>
    </BODY>
    </HTML>
    Ramya:cool:
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  3. 03-25-2010, 10:08 AM #3
    Tolls
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    Default

    Except, of course, that method is not actually being called in the Javascript.
    It's being called on the server when the JSP is run, which puts a value into that place, which is then used by the Javascript on the client.
    Very different to it actually being called by the Javascript.

    In short, you can't. JSP code runs on the server, and Javascript on the client.

    You can make calls to the server to do stuff, but I doubt that's what you want.
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  4. 09-26-2011, 04:11 PM #4
    seenuvasan
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    Default Re: call a JSP method

    Hi Ramya,
    i have one doubt in ur code.
    how to pass params to jsp method from js.
    ex:
    <SCRIPT LANGUAGE="JavaScript">
    function callJsp(){
    var name="seenu";
    alert("<%= hai(name)%>");
    }
    </SCRIPT>

    in above code shows error . how to pass name params to jsp method?.

    Quote Originally Posted by RamyaSivakanth View Post
    See this below sample code for calling jsp meth in javascript.

    <%!
    String hai()
    {
    return "Iam Ramya";
    }
    %>
    <HTML>
    <HEAD><TITLE> Example of onClick Event Handler</TITLE>
    <SCRIPT LANGUAGE="JavaScript">
    function callJsp(){

    alert("<%= hai()%>");
    }
    </SCRIPT>
    </HEAD>
    <BODY BGCOLOR="FFFFFF" TEXT="000000">

    <form name="myform">
    <INPUT TYPE="button" VALUE="Click Here" onClick="callJsp()">
    </form>
    </BODY>
    </HTML>
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  5. 09-26-2011, 04:19 PM #5
    Tolls
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    Default Re: call a JSP method

    You can't (as I said 18 months ago).
    "name" exists on the client.
    hai() exists on the server.

    Unless your client makes a call (say an Ajax call) to the server then they will never meet.
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