Unable to bind value from java bean to jsp using jstl

Question

I have a String getter and setter that i am setting in my bean.

I am trying to get the value in my jsp using jstl like this :

    <jsp:useBean class="com.test.MyBean" id="results" scope="request"/>


    <script type="text/javascript">
    function setMyFields(){
    var flag="<c:out value='${results.sdateFlag}'/>";
    alert(flag);                
    var text_box = document.getElementById('mySelectedDate');
    if(flag=="true"){
    text_box.setAttribute('disabled', 'disabled');
    }
    }
    window.onload = setMyFields;
    </script>

I have imported jstl core as well in my jsp.

But when i do this i get an error like this :

    javax.servlet.ServletException: Unable to find a value for "sdateFlag" in object of class "com.test.MyBean" using operator "."
    at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:660)
    at com.ibm._jsp._pageMyAmount._jspService(_pageMyAmount.java:306)
    at com.ibm.ws.jsp.runtime.HttpJspBase.service(HttpJspBase.java:87)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
    at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1101)
    at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:569)
    at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:478)
    at com.ibm.wsspi.webcontainer.servlet.GenericServletWrapper.handleRequest(GenericServletWrapper.java:122)
    at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper.handleRequest(AbstractJSPExtensionServletWrapper.java:226)
    at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:321)

But ihave been debugging the java class using the java debugger and it seems the value is getting set. Then why is it not getting the value ?

EDIT : These are the setter and getter of my bean :

public void setDateFlag(String  b)          { sDateFlag = b; }
public String isDateFlag()                  { return sDateFlag; }

What's wrong here ? Am i missing something ?

Answer 1

You're treating the dateFlag as a boolean property, but it is in fact a String . So you "getter" should be called getDateFlag , not isDateFlag . As mentioned, the isPropertyName syntax is only applicable to properties of type boolean .

Also, <c:out value='${results.dateFlag}'/> isn't really needed. You should be able to simply do ${results.dateFlag} .

Answer 2

So , i got the problem fixed and it was a bizarre solution. The problem it seems is, any variable declared must follow java standards. And my problem was , i had given the variable name as sDateFlag in my original proprietary code, which does not follow the java naming conventions. When i removed it and gave it as flag , it started working. I R&D ed the answer using this link here : JSTL . Though it's not fully correct, it led me to the root cause of my problem. And i will like to convey my thanks to all of you guys , who have replied to me, to make the process easy .