How to send variable data from doView to JSP page?

[12年前 に Jignesh Vachhani によって更新されました。]

you can set it through renderRequest parameter and can access it to your jsp file.

[12年前 に Ravi Kumar Gupta によって更新されました。]

Thats right.. you can access attributes like this.
Just request.getAttribute("attr") will work in jsp..

[12年前 に Ravi Kumar Gupta によって更新されました。]

An attribute is an object. You need to check whether it is null or not before you can use it and that will save from some errors as well..

Best is to check before sending the value to jsp. Don't send null..

If you can share the code you are using that will give clear idea..

[12年前 に Sandeep Nair によって更新されました。]

Hi,

It should work. I am attaching a small portlet called AttributePortlet in which i have set attribute in doView and reading the same in view.jsp

Regards,
Sandeep

[12年前 に Ravi Kumar Gupta によって更新されました。]

Try like this..
<%
Object scriptObj = renderRequest.getAttribute("generatedScript");
String script = "";
if(Validator.isNotNull(scriptObj)){
script = scriptObj.toString();
}

%>
Now use script variable as you wish.. it should not give exception..

[12年前 に Ravi Kumar Gupta によって更新されました。]

Validator is a utility class. You can just check like

if(scriptObj!=null){
script = scriptObj.toString();
}

Or to use Validator you need to import

<%@page import="com.liferay.portal.kernel.util.Validator" %>

[12年前 に Ravi Kumar Gupta によって更新されました。]

This should not happen.. can u try this

Object scriptObj = request.getAttribute("generatedScript");

instead of

Object scriptObj = renderRequest.getAttribute("generatedScript");

Can you share complete doView() method code.. are you redirecting to some other page.. ??

[12年前 に Sandeep Nair によって更新されました。]

Try this

public void doView(RenderRequest request, RenderResponse response) throws PortletException, IOException {

//gets data only for consumers table
ResultSet rs = queryDb.queryDb("Consumers");
String javaScript = Tablerize.create(rs);
request.setAttribute("generatedScript", "this is a test variable");

//prints out javascript in console for reference
System.out.println("----------------------------------------------");
System.out.println(javaScript);
System.out.println("----------------------------------------------");

response.setContentType("text/html");
PortletRequestDispatcher dispatcher =
getPortletContext().getRequestDispatcher("/WEB-INF/jsp/MedelogGetAdmin_view.jsp");
dispatcher.include(request, response);


}

And i would suggest you to use MVCPortlet so that you dont have to worry about dispatching and stuff.

Regards,
sandeep

[12年前 に Sandeep Nair によって更新されました。]

Well if you see your code you were dispatching the control to jsp and then setting the attribute

response.setContentType("text/html");
PortletRequestDispatcher dispatcher =
getPortletContext().getRequestDispatcher("/WEB-INF/jsp/MedelogGetAdmin_view.jsp");
dispatcher.include(request, response);

-------------------And then--------------

//gets data only for consumers table
ResultSet rs = queryDb.queryDb("Consumers");
String javaScript = Tablerize.create(rs);
request.setAttribute("generatedScript", "this is a test variable");

//prints out javascript in console for reference
System.out.println("----------------------------------------------");
System.out.println(javaScript);
System.out.println("----------------------------------------------");

So its apparent that the request wouldnt have the attribute as you are setting it later. So i moved the logic of fetching from db and setting in request before
First the below

//gets data only for consumers table
ResultSet rs = queryDb.queryDb("Consumers");
String javaScript = Tablerize.create(rs);
request.setAttribute("generatedScript", "this is a test variable");

//prints out javascript in console for reference
System.out.println("----------------------------------------------");
System.out.println(javaScript);
System.out.println("----------------------------------------------");

And then i included the jsp

response.setContentType("text/html");
PortletRequestDispatcher dispatcher =
getPortletContext().getRequestDispatcher("/WEB-INF/jsp/MedelogGetAdmin_view.jsp");
dispatcher.include(request, response);

-------

As far as MVCPortlet goes right now your portlet class may be extending GenericPortlet I suppose but you can extend MVCPortlet instead and it makes life easier for you.

More about MVCPortlet here -->http://www.liferay.com/documentation/liferay-portal/6.0/development/-/ai/portlet-development

Regards,
Sandeep