Hi all. I have this code: 1. JSP file(DataTableTest.jsp): <%@ page language="java" pageEncoding="UTF-8"%> | <%@ taglib uri="http://java.sun.com/jsf/html"; prefix="h"%> | <%@ taglib uri="http://java.sun.com/jsf/core"; prefix="f"%> | | <f:view> | <h:form id="dataTableForm"> | <h:dataTable border="1" id="dataTableTest" value="#{dataTableTest.data}" var="item"> | <h:column> | <h:outputLabel value="#{item.label}"/> | <h:inputText value="#{item.text}" /> | </h:column> | <h:column> | <h:commandButton action="#{dataTableTest.update}" value="Update" /> | </h:column> | </h:dataTable> | <h:commandButton value="Preview" action="#{dataTableTest.previewMe}" /> | </h:form> | </f:view> | 2. Java1(DataTableTest.java): package org.jbpm.webapp.bean; | import java.util.ArrayList; | import java.util.List; | | import javax.faces.model.DataModel; | import javax.faces.model.ListDataModel; | | public class DataTableTest { | private DataModel myData=null; | private List listData=null; | | public DataModel getData(){ | if (myData==null){ | myData=new ListDataModel(); | } | if (listData==null){ | listData=new ArrayList(); | MyObject myObject=new MyObject(); | myObject.setLabel("line1"); | myObject.setText("Line 1"); | listData.add(myObject); | | myObject=new MyObject(); | myObject.setLabel("line2"); | myObject.setText("Line 2"); | listData.add(myObject); | } | myData.setWrappedData(listData); | return myData; | } | | public String previewMe(){ | int origin=myData.getRowIndex(); | System.out.println("1.Debug from Data table ==========="); | for (int i=0; i<myData.getRowCount(); i++){ | myData.setRowIndex(i); | System.out.println("line "+i+" : "+((MyObject)myData.getRowData()).getText()); | } | System.out.println("2.Debug from Data table ==========="); | myData.setRowIndex(origin); | return "home"; | } | | public String update(){ | int originIndex=myData.getRowIndex(); | if (originIndex>=0){ | String item=((MyObject)myData.getRowData()).getText(); | String label=((MyObject)myData.getRowData()).getLabel(); | MyObject myObject=new MyObject(); | myObject.setLabel(label); | myObject.setText(item); | | listData.set(originIndex, myObject); | System.out.println("Index: " + originIndex + " data: " + myObject.getText()); | } | return "home"; | } | } | 3. Java2(MyObject.java): package org.jbpm.webapp.bean; | | public class MyObject { | private String label; | private String text; | | public String getLabel() { | return label; | } | public void setLabel(String label) { | this.label = label; | } | public String getText() { | return text; | } | public void setText(String text) { | this.text = text; | } | }
Do not worry about faces-config.xml. Here is my PROBLEM. When i run this code on Tomcat Server, the Result as i want. But when i run this code with JBPM WEB APP(i insert my code into jbpm.war) on Jbpm Server, i have this error at start time of DataTableTest.jsp page. 4. Error: 17:25:14,578 DEBUG [LogFilter] request http://localhost:8080/jbpm/faces/login.jsp | 17:25:14,578 DEBUG [LogFilter] request parameter [login:username]=Every One | 17:25:14,578 DEBUG [LogFilter] request parameter [login_SUBMIT]=1 | 17:25:14,578 DEBUG [LogFilter] request parameter [login:_link_hidden_]= | 17:25:14,593 DEBUG [LogFilter] request parameter [login:_id3]=Data Table | 17:25:14,593 DEBUG [LogFilter] session parameter [org.apache.myfaces.application.jsp.JspStateManagerImpl.SERIALIZED_VIEW-/login.jsp]=[Ljava.lang.Object;@437d | 17:25:14,593 DEBUG [LogFilter] session parameter [javax.faces.request.charset]=ISO-8859-1 | 17:25:14,593 DEBUG [LogFilter] session parameter [EMAIL PROTECTED] | 17:25:14,593 DEBUG [PersistenceContext] beginning transaction | 17:25:14,718 ERROR [[jsp]] Servlet.service() for servlet jsp threw exception | java.lang.NullPointerException: Attribute 'for' of label component with id dataTableForm:dataTableTest_0:_id1 | at org.apache.myfaces.renderkit.html.HtmlLabelRenderer.encodeBegin(HtmlLabelRenderer.java:60) | at javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:307) | at org.apache.myfaces.renderkit.RendererUtils.renderChild(RendererUtils.java:441) | at org.apache.myfaces.renderkit.RendererUtils.renderChildren(RendererUtils.java:427) | at org.apache.myfaces.renderkit.RendererUtils.renderChild(RendererUtils.java:448) | at org.apache.myfaces.renderkit.html.HtmlTableRendererBase.renderColumnBody(HtmlTableRendererBase.java:195) | at org.apache.myfaces.renderkit.html.HtmlTableRendererBase.encodeColumnChild(HtmlTableRendererBase.java:168) | at org.apache.myfaces.renderkit.html.HtmlTableRendererBase.encodeInnerHtml(HtmlTableRendererBase.java:154) | at org.apache.myfaces.renderkit.html.HtmlTableRendererBase.encodeChildren(HtmlTableRendererBase.java:94) | at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:319) | at javax.faces.webapp.UIComponentTag.encodeChildren(UIComponentTag.java:343) | at javax.faces.webapp.UIComponentTag.doEndTag(UIComponentTag.java:251) | at org.apache.myfaces.taglib.UIComponentBodyTagBase.doEndTag(UIComponentBodyTagBase.java:55) | at org.apache.jsp.DataTableTest_jsp._jspx_meth_h_dataTable_0(org.apache.jsp.DataTableTest_jsp:192) | at org.apache.jsp.DataTableTest_jsp._jspx_meth_h_form_0(org.apache.jsp.DataTableTest_jsp:139) | at org.apache.jsp.DataTableTest_jsp._jspx_meth_f_view_0(org.apache.jsp.DataTableTest_jsp:109) | at org.apache.jsp.DataTableTest_jsp._jspService(org.apache.jsp.DataTableTest_jsp:74) | at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97) | at javax.servlet.http.HttpServlet.service(HttpServlet.java:810) | at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322) | at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314) | at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) | at javax.servlet.http.HttpServlet.service(HttpServlet.java:810) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) | at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672) | at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463) | at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398) | at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301) | at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:415) | at org.apache.myfaces.application.jsp.JspTilesViewHandlerImpl.dispatch(JspTilesViewHandlerImpl.java:233) | at org.apache.myfaces.application.jsp.JspTilesViewHandlerImpl.renderView(JspTilesViewHandlerImpl.java:219) | at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:300) | at javax.faces.webapp.FacesServlet.service(FacesServlet.java:95) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) | at org.jbpm.webapp.filter.AuthenticationFilter.doFilter(AuthenticationFilter.java:25) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) | at org.jbpm.webapp.filter.PersistenceFilter.doFilter(PersistenceFilter.java:28) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) | at org.jbpm.webapp.filter.ContextFilter.doFilter(ContextFilter.java:19) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) | at org.jbpm.webapp.filter.LogFilter.doFilter(LogFilter.java:38) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) | at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) | at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) | at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) | at org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:39) | at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:159) | at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59) | at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) | at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) | at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) | at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) | at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856) | at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744) | at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) | at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112) | at java.lang.Thread.run(Thread.java:595) | 17:25:14,781 DEBUG [PersistenceContext] rolling back transaction | 17:25:14,781 ERROR [[FacesServlet]] Servlet.service() for servlet FacesServlet threw exception | javax.faces.FacesException: Attribute 'for' of label component with id dataTableForm:dataTableTest_0:_id1 | at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:421) | at org.apache.myfaces.application.jsp.JspTilesViewHandlerImpl.dispatch(JspTilesViewHandlerImpl.java:233) | at org.apache.myfaces.application.jsp.JspTilesViewHandlerImpl.renderView(JspTilesViewHandlerImpl.java:219) | at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:300) | at javax.faces.webapp.FacesServlet.service(FacesServlet.java:95) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) | at org.jbpm.webapp.filter.AuthenticationFilter.doFilter(AuthenticationFilter.java:25) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) | at org.jbpm.webapp.filter.PersistenceFilter.doFilter(PersistenceFilter.java:28) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) | at org.jbpm.webapp.filter.ContextFilter.doFilter(ContextFilter.java:19) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) | at org.jbpm.webapp.filter.LogFilter.doFilter(LogFilter.java:38) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) | at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) | at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) | at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) | at org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:39) | at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:159) | at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59) | at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) | at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) | at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) | at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) | at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856) | at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744) | at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) | at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112) | at java.lang.Thread.run(Thread.java:595) | Caused by: org.apache.jasper.JasperException: Attribute 'for' of label component with id dataTableForm:dataTableTest_0:_id1 | at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:370) | at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314) | at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) | at javax.servlet.http.HttpServlet.service(HttpServlet.java:810) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) | at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672) | at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463) | at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398) | at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301) | at org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:415) | ... 35 more | 17:25:14,828 DEBUG [StaticNotifier] woke up Help me to correct it please. 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