javax.servlet.ServletException: Cannot get value for express
tahirakramch Aug 4, 2006 5:46 AMI m having problem with running of my JSP page which is calling managed bean properties. I dont know wht thing is missing but I hope with review of u ppl I will got the solution..
convert.jsp:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <%@taglib uri="http://java.sun.com/jsf/html" prefix="h"%> <%@taglib uri="http://java.sun.com/jsf/core" prefix="f"%> <html> <head> </head> <body> <f:view> <html> <head> <title>Celsius converter</title> </head> <body> <h1>Celcius Convertersss</h1> <hr> <h:form> <h:inputText value="#{pageBean.celsius}" /> <h:outputText value="Celsius" /><br/> <h:outputText value="#{pageBean.fahrenheit}" /> <h:outputText value="Fahrenheit" /><br/> <h:commandButton value="Convert" action="#{pageBean.convertToFahrenheit}" /> </h:form> </body> </html> </f:view> </body> </html>
faces-config.xml:
<?xml version="1.0"?> <!DOCTYPE faces-config PUBLIC "-//Sun Microsystems, Inc.//DTD JavaServer Faces Config 1.1//EN" "http://java.sun.com/dtd/web-facesconfig_1_1.dtd"> <faces-config> <!--Now this config file is empty--> <managed-bean> <managed-bean-name>pageBean</managed-bean-name> <managed-bean-class>jsfbean.PageBean</managed-bean-class> <managed-bean-scope>request</managed-bean-scope> </managed-bean> </faces-config>
PageBean:
package jsfbean; public class PageBean { private Double celsius = null; private Double fahrenheit = null; public PageBean(){ } public void setCelsius(Double celsius){ this.celsius = celsius; } public Double getCelsius(){ return celsius; } public void setFahrenheit(Double fahrenheit){ this.fahrenheit = fahrenheit; } public Double getFahrenheit(){ return fahrenheit; } public void convertToFahrenheit(){ setFahrenheit(new Double(getCelsius().doubleValue() * 1.8 + 32)); } }
web.xml:
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd"> <web-app> <display-name>The simplest JSF application.</display-name> <servlet> <servlet-name>Faces Servlet</servlet-name> <servlet-class>javax.faces.webapp.FacesServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>Faces Servlet</servlet-name> <url-pattern>*.jsf</url-pattern> </servlet-mapping> <listener> <listener-class>org.apache.myfaces.webapp.StartupServletContextListener</listener-class> </listener> </web-app>
Please share if u have solve this problem....
Thx