单击 a4j:commandbutton 时，方法不会被执行
我正在使用jsf2.0、richfaces 4.0、tomcat 6.0开发一个应用程序。在页面上我试图删除一行。但是，当我单击删除图标时，有时不会出现弹出面板，并且当显示该面板时，单击删除按钮时没有任何反应。
以下是我的 .xhtml 文件：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:c="http://java.sun.com/jsp/jstl/core"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:a4j="http://richfaces.org/a4j"
xmlns:rich="http://richfaces.org/rich">
<ui:composition template="template.xhtml">
<ui:define name="metadata">
<f:metadata>
<f:viewParam name="meetingId" required="true" value="#{meetingBean.selectedMeetId}" />
</f:metadata>
</ui:define>
<ui:define name="content">
<h3>List of Employees in selected meeting</h3>
<a4j:status onstart="#{rich:component('statPane')}.show()"
onstop="#{rich:component('statPane')}.hide()" />
<h:form>
<c:if test="#{! empty meetingBean.selectedMeeting}">
<c:set target="#{flash}" property="selectedMeeting"
value="#{meetingBean.selectedMeeting}" />
</c:if>
<c:if test="#{! empty flash.selectedMeeting}">
<c:set target="#{meetingBean}" property="selectedMeeting"
value="#{flash.selectedMeeting}" />
</c:if>
<rich:extendedDataTable value="#{meetingBean.selectedMeeting.employees}" var="empMeet" border="1" id="table">
<rich:column>
<f:facet name="header">Employee Id</f:facet>
#{empMeet.empId}
</rich:column>
<rich:column>
<f:facet name="header"> Employee Name</f:facet>
#{empMeet.firstName} #{empMeet.lastName}
</rich:column>
<rich:column>
<a4j:commandLink execute="@this" render="@none" oncomplete="#{rich:component('confirmPanel')}.show();">
<h:graphicImage value="/images/icons/delete.gif" alt="delete" />
<a4j:param value="#{empMeet.empId}" assignTo="#{meetingBean.deleteEmpId}" />
</a4j:commandLink>
</rich:column>
</rich:extendedDataTable>
<a4j:jsFunction name="removeEmp" action="#{meetingBean.deleteEmployee}" render="table" execute="@this"
oncomplete="#{rich:component('confirmPanel')}.hide();" >
</a4j:jsFunction>
<rich:popupPanel id="statPane" autosized="true">
<h:graphicImage value="/images/ai.gif" />
Please wait...
</rich:popupPanel>
<rich:popupPanel id="confirmPanel" autosized="true" >
Are you sure you want to delete the row?
<a4j:commandButton value="Cancel" onclick="#{rich:component('confirmPane')}.hide(); return false;" />
<a4j:commandButton value="Delete" onclick="removeEmp(); return false;" />
</rich:popupPanel>
<h:commandButton action="addEmpMeeting" value="Invite More Employees" />
</h:form>
</ui:define>
</ui:composition>
</html>
以下是我的 bean 类：
package com.drishti.apps.mommanager.meeting;
/**
* this class represents a meeting object
*/
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.ListIterator;
import java.util.Map;
import javax.faces.application.FacesMessage;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ManagedProperty;
import javax.faces.event.ComponentSystemEvent;
import javax.faces.model.DataModel;
import javax.faces.model.ListDataModel;
import org.richfaces.component.SortOrder;
import com.drishti.apps.mommanager.employee.AbstractBacking;
import com.drishti.apps.mommanager.employee.EmployeeEntity;
import com.drishti.apps.mommanager.employee.EmployeeService;
@ManagedBean
public class MeetingBean extends AbstractBacking {
@ManagedProperty(value = "#{requestScope}")
private Map<String, Object> requestMap;
private int meetingId;
private Date meetingTime;
private String agenda;
private String result;
public String[] empIdsInMeeting;
private List<EmployeeEntity> employees = new ArrayList<EmployeeEntity>();
private Integer selectedMeetId;
private MeetingEntity selectedMeeting;
private String selectedAgenda;
private int deleteEmpId;
private EmployeeEntity deletableEmployee;
/**
* this method is used to load a meeting object when it is being updated
*
* @param cse
*/
public void loadMeeting(ComponentSystemEvent cse) {
if (null == getSelectedMeeting()) {
Integer meetId = getSelectedMeetId();
if (meetId == null) {
meetId = (Integer)getFlash().get("selectedMeetId");
}
if (meetId == null) {
getFacesContext().addMessage(null, new FacesMessage("The meeting is invalid"));
getFlash().setKeepMessages(true);
getFacesContext().getApplication().getNavigationHandler()
.handleNavigation(getFacesContext(), null, "listMeetings");
} else {
MeetingEntity meet = MeetingService.getCurrentInstance().getMeetingForId(meetId);
if (meet == null) {
getFacesContext().addMessage(null, new FacesMessage("The meeting is invalid"));
getFlash().setKeepMessages(true);
getFacesContext().getApplication().getNavigationHandler()
.handleNavigation(getFacesContext(), null, "listMeetings");
} else {
getFlash().put("selectedMeeting", meet);
getSelectedMeeting();
}
}
}
}
/**
* this method updates a meeting object
*
* @return
*/
public void updateMeeting() {
//String result = null;
MeetingService meetSer = MeetingService.getCurrentInstance();
MeetingEntity meeting = getSelectedMeeting();
meetSer.updateMeeting(meeting);
getFlash().clear();
//result = "meetUpdated";
//return result;
}
/**
* this method adds a meeting object to database
*
* @return
*/
public void addMeeting() {
MeetingEntity meeting = (MeetingEntity)getRequestMap().get("meetingEntity");
MeetingService.getCurrentInstance().addMeeting(meeting);
//return "successMeeting";
}
/**
* this method is used to delete a meeting
*/
public void deleteMeeting(){
MeetingService meetSer = MeetingService.getCurrentInstance();
MeetingEntity meeting = getSelectedMeeting();
meetSer.deleteMeeting(meeting);
getFlash().clear();
}
/**
* returns data model containing all meetings present in database
*
* @return
*/
public DataModel<MeetingEntity> getMeetingList() {
DataModel<MeetingEntity> meetingList = new ListDataModel<MeetingEntity>(MeetingService.getCurrentInstance()
.getMeetings());
return meetingList;
}
/**
* returns list containing agenda of all meetings
*
* @return
*/
public ArrayList<String> getAgendaList() {
ArrayList<String> agendaList = new ArrayList<String>();
agendaList.add(getSelectedMeeting().getAgenda());
return agendaList;
}
/**
* this method is used to get a list of employee names for employees who are not invited to a particular meeting
*/
public List<String> getEmpNameIdList() {
List<EmployeeEntity> employeeList = new ArrayList<EmployeeEntity>(EmployeeService.getCurrentInstance()
.getEmployeeList());
List<String> uninvitedEmpList = new ArrayList<String>();
ListIterator<EmployeeEntity> empIter = employeeList.listIterator();
ArrayList<Integer> idList = new ArrayList<Integer>();
while (empIter.hasNext()) {
idList.add(empIter.next().getEmpId());
}
MeetingEntity meeting = getSelectedMeeting();
List<EmployeeEntity> employees = meeting.getEmployees();
if(employees!=null){
ListIterator<EmployeeEntity> invitedIter = employees.listIterator();
ArrayList<Integer> invitedIds = new ArrayList<Integer>();
while (invitedIter.hasNext()) {
invitedIds.add(invitedIter.next().getEmpId());
}
idList.removeAll(invitedIds);
}
EmployeeEntity emp;
ListIterator<Integer> idIter = idList.listIterator();
while (idIter.hasNext()) {
int id = idIter.next();
emp = EmployeeService.getCurrentInstance().getEmployeeForId(id);
uninvitedEmpList.add(emp.getFirstName() + " " + emp.getLastName() + " (" + emp.getEmpId() + ")");
}
return uninvitedEmpList;
}
/**
* this method adds employees to a meeting
* @return
*/
public String addEmpToMeeting() {
MeetingEntity meeting = MeetingService.getCurrentInstance().getMeetingFromAgenda(
getSelectedMeeting().getAgenda());
for (int i = 0; i < empIdsInMeeting.length; i++) {
String id = null;
id = empIdsInMeeting[i].substring(empIdsInMeeting[i].lastIndexOf("(") + 1,
empIdsInMeeting[i].lastIndexOf(")"));
int empId = Integer.parseInt(id);
meeting.getEmployees().add(EmployeeService.getCurrentInstance().getEmployeeForId(empId));
}
MeetingService.getCurrentInstance().addMeeting(meeting);
return "empAddedToMeeting";
}
/**
* this method removes employee from a meeting
* @return
*/
public void deleteEmployee(){
List<EmployeeEntity>inviteEmployees=getSelectedMeeting().getEmployees();
EmployeeEntity emp=getDeletableEmployee();
inviteEmployees.remove(emp);
}
public Integer getSelectedMeetId() {
return selectedMeetId;
}
public void setSelectedMeetId(Integer selectedMeetId) {
this.selectedMeetId = selectedMeetId;
setSelectedMeeting(MeetingService.getCurrentInstance().getMeetingForId(selectedMeetId));
}
public MeetingEntity getSelectedMeeting() {
return selectedMeeting;
}
public void setSelectedMeeting(MeetingEntity selectedMeeting) {
this.selectedMeeting = selectedMeeting;
}
public Map<String, Object> getRequestMap() {
return requestMap;
}
public void setRequestMap(Map<String, Object> requestMap) {
this.requestMap = requestMap;
}
public Date getMeetingTime() {
return meetingTime;
}
public void setMeetingTime(Date meetingTime) {
this.meetingTime = meetingTime;
}
public String getAgenda() {
return agenda;
}
public void setAgenda(String agenda) {
this.agenda = agenda;
}
public String getResult() {
return result;
}
public void setResult(String result) {
this.result = result;
}
public int getMeetingId() {
return this.meetingId;
}
public List<EmployeeEntity> getEmployees() {
return employees;
}
public String[] getEmpIdsInMeeting() {
return empIdsInMeeting;
}
public void setEmpIdsInMeeting(String[] empIdsInMeeting) {
this.empIdsInMeeting = empIdsInMeeting;
}
public void setEmployees(List<EmployeeEntity> employees) {
this.employees = employees;
}
public String getSelectedAgenda() {
return selectedAgenda;
}
public void setSelectedAgenda(String selectedAgenda) {
this.selectedAgenda = selectedAgenda;
}
public void setTimeOrder(SortOrder timeOrder) {
this.timeOrder = timeOrder;
}
public int getDeleteEmpId() {
return deleteEmpId;
}
public void setDeleteEmpId(int deleteEmpId) {
this.deleteEmpId = deleteEmpId;
setDeletableEmployee(EmployeeService.getCurrentInstance().getEmployeeForId(deleteEmpId));
}
public EmployeeEntity getDeletableEmployee() {
return deletableEmployee;
}
public void setDeletableEmployee(EmployeeEntity deletableEmployee) {
this.deletableEmployee = deletableEmployee;
}
}
请帮忙。
I am developing an application using jsf2.0, richfaces 4.0, tomcat 6.0. On a page I am trying to delete a row . But when I click the delete icon, sometimes popup panel does not appear and when it is shown , nothing happens on clicking the delete button.
Following is my .xhtml file:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:c="http://java.sun.com/jsp/jstl/core"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:a4j="http://richfaces.org/a4j"
xmlns:rich="http://richfaces.org/rich">
<ui:composition template="template.xhtml">
<ui:define name="metadata">
<f:metadata>
<f:viewParam name="meetingId" required="true" value="#{meetingBean.selectedMeetId}" />
</f:metadata>
</ui:define>
<ui:define name="content">
<h3>List of Employees in selected meeting</h3>
<a4j:status onstart="#{rich:component('statPane')}.show()"
onstop="#{rich:component('statPane')}.hide()" />
<h:form>
<c:if test="#{! empty meetingBean.selectedMeeting}">
<c:set target="#{flash}" property="selectedMeeting"
value="#{meetingBean.selectedMeeting}" />
</c:if>
<c:if test="#{! empty flash.selectedMeeting}">
<c:set target="#{meetingBean}" property="selectedMeeting"
value="#{flash.selectedMeeting}" />
</c:if>
<rich:extendedDataTable value="#{meetingBean.selectedMeeting.employees}" var="empMeet" border="1" id="table">
<rich:column>
<f:facet name="header">Employee Id</f:facet>
#{empMeet.empId}
</rich:column>
<rich:column>
<f:facet name="header"> Employee Name</f:facet>
#{empMeet.firstName} #{empMeet.lastName}
</rich:column>
<rich:column>
<a4j:commandLink execute="@this" render="@none" oncomplete="#{rich:component('confirmPanel')}.show();">
<h:graphicImage value="/images/icons/delete.gif" alt="delete" />
<a4j:param value="#{empMeet.empId}" assignTo="#{meetingBean.deleteEmpId}" />
</a4j:commandLink>
</rich:column>
</rich:extendedDataTable>
<a4j:jsFunction name="removeEmp" action="#{meetingBean.deleteEmployee}" render="table" execute="@this"
oncomplete="#{rich:component('confirmPanel')}.hide();" >
</a4j:jsFunction>
<rich:popupPanel id="statPane" autosized="true">
<h:graphicImage value="/images/ai.gif" />
Please wait...
</rich:popupPanel>
<rich:popupPanel id="confirmPanel" autosized="true" >
Are you sure you want to delete the row?
<a4j:commandButton value="Cancel" onclick="#{rich:component('confirmPane')}.hide(); return false;" />
<a4j:commandButton value="Delete" onclick="removeEmp(); return false;" />
</rich:popupPanel>
<h:commandButton action="addEmpMeeting" value="Invite More Employees" />
</h:form>
</ui:define>
</ui:composition>
</html>
Following is my bean class:
package com.drishti.apps.mommanager.meeting;
/**
* this class represents a meeting object
*/
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.ListIterator;
import java.util.Map;
import javax.faces.application.FacesMessage;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ManagedProperty;
import javax.faces.event.ComponentSystemEvent;
import javax.faces.model.DataModel;
import javax.faces.model.ListDataModel;
import org.richfaces.component.SortOrder;
import com.drishti.apps.mommanager.employee.AbstractBacking;
import com.drishti.apps.mommanager.employee.EmployeeEntity;
import com.drishti.apps.mommanager.employee.EmployeeService;
@ManagedBean
public class MeetingBean extends AbstractBacking {
@ManagedProperty(value = "#{requestScope}")
private Map<String, Object> requestMap;
private int meetingId;
private Date meetingTime;
private String agenda;
private String result;
public String[] empIdsInMeeting;
private List<EmployeeEntity> employees = new ArrayList<EmployeeEntity>();
private Integer selectedMeetId;
private MeetingEntity selectedMeeting;
private String selectedAgenda;
private int deleteEmpId;
private EmployeeEntity deletableEmployee;
/**
* this method is used to load a meeting object when it is being updated
*
* @param cse
*/
public void loadMeeting(ComponentSystemEvent cse) {
if (null == getSelectedMeeting()) {
Integer meetId = getSelectedMeetId();
if (meetId == null) {
meetId = (Integer)getFlash().get("selectedMeetId");
}
if (meetId == null) {
getFacesContext().addMessage(null, new FacesMessage("The meeting is invalid"));
getFlash().setKeepMessages(true);
getFacesContext().getApplication().getNavigationHandler()
.handleNavigation(getFacesContext(), null, "listMeetings");
} else {
MeetingEntity meet = MeetingService.getCurrentInstance().getMeetingForId(meetId);
if (meet == null) {
getFacesContext().addMessage(null, new FacesMessage("The meeting is invalid"));
getFlash().setKeepMessages(true);
getFacesContext().getApplication().getNavigationHandler()
.handleNavigation(getFacesContext(), null, "listMeetings");
} else {
getFlash().put("selectedMeeting", meet);
getSelectedMeeting();
}
}
}
}
/**
* this method updates a meeting object
*
* @return
*/
public void updateMeeting() {
//String result = null;
MeetingService meetSer = MeetingService.getCurrentInstance();
MeetingEntity meeting = getSelectedMeeting();
meetSer.updateMeeting(meeting);
getFlash().clear();
//result = "meetUpdated";
//return result;
}
/**
* this method adds a meeting object to database
*
* @return
*/
public void addMeeting() {
MeetingEntity meeting = (MeetingEntity)getRequestMap().get("meetingEntity");
MeetingService.getCurrentInstance().addMeeting(meeting);
//return "successMeeting";
}
/**
* this method is used to delete a meeting
*/
public void deleteMeeting(){
MeetingService meetSer = MeetingService.getCurrentInstance();
MeetingEntity meeting = getSelectedMeeting();
meetSer.deleteMeeting(meeting);
getFlash().clear();
}
/**
* returns data model containing all meetings present in database
*
* @return
*/
public DataModel<MeetingEntity> getMeetingList() {
DataModel<MeetingEntity> meetingList = new ListDataModel<MeetingEntity>(MeetingService.getCurrentInstance()
.getMeetings());
return meetingList;
}
/**
* returns list containing agenda of all meetings
*
* @return
*/
public ArrayList<String> getAgendaList() {
ArrayList<String> agendaList = new ArrayList<String>();
agendaList.add(getSelectedMeeting().getAgenda());
return agendaList;
}
/**
* this method is used to get a list of employee names for employees who are not invited to a particular meeting
*/
public List<String> getEmpNameIdList() {
List<EmployeeEntity> employeeList = new ArrayList<EmployeeEntity>(EmployeeService.getCurrentInstance()
.getEmployeeList());
List<String> uninvitedEmpList = new ArrayList<String>();
ListIterator<EmployeeEntity> empIter = employeeList.listIterator();
ArrayList<Integer> idList = new ArrayList<Integer>();
while (empIter.hasNext()) {
idList.add(empIter.next().getEmpId());
}
MeetingEntity meeting = getSelectedMeeting();
List<EmployeeEntity> employees = meeting.getEmployees();
if(employees!=null){
ListIterator<EmployeeEntity> invitedIter = employees.listIterator();
ArrayList<Integer> invitedIds = new ArrayList<Integer>();
while (invitedIter.hasNext()) {
invitedIds.add(invitedIter.next().getEmpId());
}
idList.removeAll(invitedIds);
}
EmployeeEntity emp;
ListIterator<Integer> idIter = idList.listIterator();
while (idIter.hasNext()) {
int id = idIter.next();
emp = EmployeeService.getCurrentInstance().getEmployeeForId(id);
uninvitedEmpList.add(emp.getFirstName() + " " + emp.getLastName() + " (" + emp.getEmpId() + ")");
}
return uninvitedEmpList;
}
/**
* this method adds employees to a meeting
* @return
*/
public String addEmpToMeeting() {
MeetingEntity meeting = MeetingService.getCurrentInstance().getMeetingFromAgenda(
getSelectedMeeting().getAgenda());
for (int i = 0; i < empIdsInMeeting.length; i++) {
String id = null;
id = empIdsInMeeting[i].substring(empIdsInMeeting[i].lastIndexOf("(") + 1,
empIdsInMeeting[i].lastIndexOf(")"));
int empId = Integer.parseInt(id);
meeting.getEmployees().add(EmployeeService.getCurrentInstance().getEmployeeForId(empId));
}
MeetingService.getCurrentInstance().addMeeting(meeting);
return "empAddedToMeeting";
}
/**
* this method removes employee from a meeting
* @return
*/
public void deleteEmployee(){
List<EmployeeEntity>inviteEmployees=getSelectedMeeting().getEmployees();
EmployeeEntity emp=getDeletableEmployee();
inviteEmployees.remove(emp);
}
public Integer getSelectedMeetId() {
return selectedMeetId;
}
public void setSelectedMeetId(Integer selectedMeetId) {
this.selectedMeetId = selectedMeetId;
setSelectedMeeting(MeetingService.getCurrentInstance().getMeetingForId(selectedMeetId));
}
public MeetingEntity getSelectedMeeting() {
return selectedMeeting;
}
public void setSelectedMeeting(MeetingEntity selectedMeeting) {
this.selectedMeeting = selectedMeeting;
}
public Map<String, Object> getRequestMap() {
return requestMap;
}
public void setRequestMap(Map<String, Object> requestMap) {
this.requestMap = requestMap;
}
public Date getMeetingTime() {
return meetingTime;
}
public void setMeetingTime(Date meetingTime) {
this.meetingTime = meetingTime;
}
public String getAgenda() {
return agenda;
}
public void setAgenda(String agenda) {
this.agenda = agenda;
}
public String getResult() {
return result;
}
public void setResult(String result) {
this.result = result;
}
public int getMeetingId() {
return this.meetingId;
}
public List<EmployeeEntity> getEmployees() {
return employees;
}
public String[] getEmpIdsInMeeting() {
return empIdsInMeeting;
}
public void setEmpIdsInMeeting(String[] empIdsInMeeting) {
this.empIdsInMeeting = empIdsInMeeting;
}
public void setEmployees(List<EmployeeEntity> employees) {
this.employees = employees;
}
public String getSelectedAgenda() {
return selectedAgenda;
}
public void setSelectedAgenda(String selectedAgenda) {
this.selectedAgenda = selectedAgenda;
}
public void setTimeOrder(SortOrder timeOrder) {
this.timeOrder = timeOrder;
}
public int getDeleteEmpId() {
return deleteEmpId;
}
public void setDeleteEmpId(int deleteEmpId) {
this.deleteEmpId = deleteEmpId;
setDeletableEmployee(EmployeeService.getCurrentInstance().getEmployeeForId(deleteEmpId));
}
public EmployeeEntity getDeletableEmployee() {
return deletableEmployee;
}
public void setDeletableEmployee(EmployeeEntity deletableEmployee) {
this.deletableEmployee = deletableEmployee;
}
}
Please help .
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评论（2）
该问题可能与 JSF 覆盖您的自定义 onclick 有关。
解决方法是使用 onmousedown 而不是 onclick，潜在的警告如下所述：
http://blogs.oracle.com/jtb/entry/jsf_h_commandlink_and_onclick
The problem is probably related to JSF overriding your custom onclick.
The work-around would be to use onmousedown instead of onclick, with the potential caveat described here:
http://blogs.oracle.com/jtb/entry/jsf_h_commandlink_and_onclick
几天前我遇到了同样的问题，将 return 更改为 true 可能对你有用。
i had the same problem few days ago, changing the return to true may work for you.