Also, beans should implement the java.io.Serializable interface if you are going to store them in the Session object.
On Mon, Feb 7, 2011 at 10:12 PM, Stephen Johnson <[email protected]>wrote: > Do you have sessions enabled for your application? > > > On Mon, Feb 7, 2011 at 5:39 AM, Louis H. <[email protected]> wrote: > >> Hi, >> I am trying jsp form handling via bean and I am wondering why this jsp >> page gives me an NPE after submitting. This happening with scope "session" >> (when I change scope to "page" it's working correctly): >> >> *<%@ page contentType="text/html;charset=UTF-8" language="java" %>* >> *<jsp:useBean id="testik" class="formBeans.Test1" scope="session"/> >> *//Works >> ok with scope="page" >> *<jsp:setProperty name="testik" property="*"/> *//NPE >> thrown here >> *<html xmlns="http://www.w3.org/1999/xhtml";> * >> * <head> * >> * <title>TestFormPage</title> * >> * </head> * >> * <body>* >> * <form action="testForm.jsp" method="post">* >> * <input type="text" id="testPole" name="testPole" value="<%= >> testik.getTestPole() %>"/>* >> * <input type="submit"/>* >> * </form>* >> * </body>* >> *</html>* >> >> Source of bean for handling data (nothing interesting here): >> *package formBeans;* >> *public class Test1 {* >> * private String testPole="";* >> * >> * >> * public String getTestPole() {* >> * return testPole;* >> * }* >> * public void setTestPole(String testPole) {* >> * this.testPole = testPole;* >> * }* >> *}* >> >> If I get it right, the "<jsp:useBean id="testik" class="formBeans.Test1" >> scope="session"/>" should create and initialize a bean in session (if it >> is not present already) but it seems the bean is not created. >> Any suggestion appreciated. >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Google App Engine for Java" group. >> To post to this group, send email to >> [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/google-appengine-java?hl=en. >> > > -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
