dynamic jsp: help in view-validator-successView

**jose_spring** · May 4th, 2007, 04:46 PM

Hi all,

It's the first time I try to make a server side validation of my web-pages.
I created a test webapp and that works perfectly:

->FormController (extends SimpleFormController) uses a validator to display the currentView page (page by default and when errors), and the successView after onSubmit -> no problem (both jsps exist already in the WEB-INF/jsp).

My current project has to create dynamically .jsp (through a database).
my problem is that my jsp webforms are empty.
workflow:
go to the database -> pageController (implements Controller) -> jsp -> browser.

Using a SimpleFormController doesn't allow me to create the jsp compare to the Controller's handleRequest method.
So, how can I do to implement the validation process if the currentView is not already populated at the FormController step?

I hope you visualize what I mean.
Thanks for any clarification.

**cwilkes** · May 5th, 2007, 01:09 AM

My current project has to create dynamically .jsp (through a database).

Do you mean have the JSP files themselves created dynamically? That seems a little bit weird. What you want to do is create your JSP and put in code/jsptags/whatever in there to dynamically display your content.

Or do you mean to display a different JSP based on some user inputs? You'll want to return a different "viewName" in your ModelAndView, ie:

Code:

  return new ModelAndView(
    (req.getParameter("foo") != null) ? "fooView" : "nonFooView");

If your code doesn't explicitly return a "ModelAndView" then you're going to use the default formView and successView that you defined in your XML.

**jose_spring** · May 7th, 2007, 01:00 PM

Hi,
my jsp is dynamically populated/displayed Indeed :

Code:

<html>
   <%-- .............................. --%>
  <c:forEach items="${Item}" var="item">
  <center>
    <<c:out value="${item.html}"escapeXml="false"/>>
  </center>
  </c:forEach>
  </form>
  </body>
</html>

here my actual controller:

Code:

public class GenericFormController extends SimpleFormController {

    public ModelAndView onSubmit(Object command)
            throws ServletException {

        return new ModelAndView(new RedirectView(getSuccessView()));
    }

    protected Object formBackingObject(HttpServletRequest request) throws ServletException {

        Test test = new Test();
         /*...........*/
        return test;

    }

and my xml:

Code:

    <bean id="test" class="bean.Test"/>

    <bean id="testVal" class="validator.TestVal">
        <property name="test">
            <ref bean="test"/>
        </property>
    </bean>

    <bean id="genericFormController" class="web.GenericFormController">
        <property name="sessionForm"><value>true</value></property>
        <property name="commandName"><value>bean</value></property>
        <property name="commandClass"><value>bean.Test</value></property>
        <property name="validator"><ref bean="testVal"/></property>
        <property name="formView"><value>test</value></property>
        <property name="successView"><value>done.html</value></property>

        <property name="dataSource">
            <ref bean="dataSource"/>
        </property>
    </bean>

    <bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
        <property name="mappings">
            <props>
                <prop key="test.html">genericFormController</prop>
                <prop key="done.html">sqlController</prop>
            </props>
        </property>
    </bean>

Without a validator I just used to use a Controller to connect to the data base, put the information into a Object's List than display the jsp:

Code:

public class GenericController extends AbstractController
{
    DataSource dataSource;


    HashMap<String, Object> map;

    public GenericController()
    {
    }

    public void setDataSource(DataSource dataSource){
        this.dataSource = dataSource;
    }

    public ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse httpServletResponse) throws Exception
    {

        map = new HashMap<String, Object>();

        PageQuery pq = new PageQuery(dataSource);
        Page p = pq.runQuery(1);
        map.put("Page",p);

        ItemQuery iq = new ItemQuery(dataSource);
        ArrayList items = iq.runQuery(1);
        map.put("Item",items);

        return new ModelAndView("test", map);
    }

}

Right now, I catch test.html which launches 'genericFormController', validator and the formView (test.jsp) is displayed, but I have a blank page.
So, I think you better understood that I would like to add a step to populate dynamically my test.jsp via one other Controller before being displayed.

I tried to create a such Controller, but the xml file doesn't like me to assign something else than:

Code:

<property name="formView"><value>test</value></property> 
<!-- 'test' here is test.jsp  -->

I tried to set the bean of the new Controller (which populate AND Display the jsp) as a value of "formView" but I got an error.

Thanks for your help.

**jose_spring** · May 8th, 2007, 12:32 PM

hi,

I managed to skip (but not exactly the behavior I expected) the problem I exposed above setting the formView to a jsp which redirects to the controller which populate the jsp via with database data and create a ModelAndView.

But now, I get the form page ok except for this:

I use jstl tag to have access to the bean information.
my jsp:

Code:

...
  <c:forEach items="${Item}" var="item">
  <center>
    <<c:out value="${item.html}"escapeXml="false"/>>
  </center>
...
  </c:forEach>

but some 'item.html' contain other jstl and spring form tag (like spring:bind).
exemple:

Code:

html = "spring:bind path="+springBind+">\n" +
          "<span>"+label+"</span>\n<input type=text id="+nameRef+" name="+nameRef+" value=\"<c:out value=${"+springBind+"}\" />"+szClass+function+"/>\n"+
          "</spring:bind";

so, I got the following html code:

Code:

send to browser:
   <spring:bind path=bean.f1_1_1>
   <span>Patient #</span>
   <input type=text id=f1_1_1 name=f1_1_1 value="<c:out value='${bean.f1_1_1}' />"/>
   </spring:bind>

browser's interpretation:
   <spring:bind _moz-userdefined="" path="bean.f1_1_1">
   <span>Patient #</span>
   <input id="f1_1_1" type="text" value="<c:out value=${bean.f1_1_1} />" name="f1_1_1"/>
  </spring:bind>

So, my problem here is that <c: out isn't interpreted but just considered as a String.
Anyone has any idea to reload the jsp interpretation process?
Do have I to split the process into: first create a first jsp (to obtain only html code except the <c: out expressions, store it and then send it back to the browser? but if yes, how??

**cwilkes** · May 8th, 2007, 09:02 PM

If you want to use "<c : out...>" you must import the taglib, but you could also just do a "${item.html}" without the c tag.

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