我对 JSF 和 primefaces 有点陌生，我遇到了一个非常烦人的问题。
我正在制作一个非常基本的应用程序来了解更多关于 primefaces 的信息。我有一个简单的表单，它有几个文本输入字段、两个日期选择器和一个下拉菜单（selectOneMenu）。
一切正常，当我提交表单时，所有值都放在支持 bean 中，下拉菜单中的值除外。该项目的设置器永远不会被调用。并且应用程序不会调用public void saveNewActivity(ActionEvent evt)命令按钮上定义的控制器上的方法。但是，当我在 html 中删除或注释掉下拉菜单时，它确实调用了该方法（但下拉菜单的字段显然是null）。
我已经尝试了将近两天，但仍然无法使其正常工作。
我有以下代码（片段）：
我的 html/jsf 代码
<div id="newActivitycontent">
<h:form id="newActivityForm">
<h:messages id="messages"/>
<table>
<tr>
<td>Gebruiker:</td>
<td><p:selectOneMenu value="#{plannedActivityController.newActivity.organiser}}"
converter="#{userConverter}">
<f:selectItem itemLabel="Kies een gebruiker" itemValue=""/>
<f:selectItems value="#{plannedActivityController.users}" var="user"
itemLabel="#{user.firstname} #{user.lastname}" itemValue="#{user}"/>
</p:selectOneMenu></td>
</tr>
<tr>
<td>Titel:</td>
<td><p:inputText value="#{plannedActivityController.newActivity.name}"/></td>
</tr>
<tr>
<td>Beschrijving:</td>
<td><p:inputText value="#{plannedActivityController.newActivity.desctription}"/></td>
</tr>
<tr>
<td>Startdatum:</td>
<td><p:calendar value="#{plannedActivityController.newActivity.startDateDate}"/></td>
</tr>
<tr>
<td>Einddatum:</td>
<td><p:calendar value="#{plannedActivityController.newActivity.endDateDate}"/></td>
</tr>
</table>
<p:commandButton id="btnSaveNewActivity" value="Opslaan"
actionListener="#{plannedActivityController.saveNewActivity}"
update=":overviewForm:activityTable messages"/>
<p:commandButton id="btnCancelNewActivity" value="Annuleren"
actionListener="#{plannedActivityController.cancelNewActivity}" onclick="hideAddNewUI()"
update=":overviewForm:activityTable" type="reset" immediate="true"/>
</h:form>
</div>
该代码使用的控制器：
@Named
@SessionScoped
public class PlannedActivityController implements Serializable {
@Inject
private ApplicationModel appModel;
@Inject
private SessionModel sessionModel;
@Inject
private ActivityMapper activityMapper;
@Inject
private UserMapper userMapper;
private ActivityBean newActivity;
private ActivityBean selectedActivity;
private List<ActivityBean> activities;
private List<UserBean> users;
public PlannedActivityController() {
}
@PostConstruct
public void onCreated() {
convertActivities();
onNewActivity();
users = userMapper.mapToValueObjects(appModel.getUsers());
}
public void convertActivities() {
List<PlannedActivity> originalActivities = appModel.getActivities();
this.activities = activityMapper.mapToValueObjects(originalActivities);
}
public void onRowEditComplete(RowEditEvent event) {
System.out.println("row edited : " + event.getObject());
//TODO: save changes back to db!
}
public void onRowSelectionMade(SelectEvent event) {
System.out.println("row selected : " + event.getObject());
selectedActivity = (ActivityBean)event.getObject();
}
//Activity crud methods
public void onNewActivity() {
newActivity = new ActivityBean();
newActivity.setId(new Date().getTime());
}
public void saveNewActivity(ActionEvent evt) {
PlannedActivity newAct = activityMapper.mapToEntity(newActivity);
if(newAct != null) {
appModel.getActivities().add(newAct);
}
convertActivities();
}
public void cancelNewActivity() {
//TODO: cleanup.
}
public void deleteSelectedActivity() {
if(selectedActivity != null) {
activities.remove(selectedActivity);
appModel.setActivities(activityMapper.mapToEntities(activities));
convertActivities();
} else {
//TODO: show error or information dialog, that delete cannot be done when nothing has been selected!
}
}
//Getters & Setters
public ApplicationModel getAppModel() {
return appModel;
}
public void setAppModel(ApplicationModel appModel) {
this.appModel = appModel;
}
public SessionModel getSessionModel() {
return sessionModel;
}
public void setSessionModel(SessionModel sessionModel) {
this.sessionModel = sessionModel;
}
public ActivityMapper getActivityMapper() {
return activityMapper;
}
public void setActivityMapper(ActivityMapper activityMapper) {
this.activityMapper = activityMapper;
}
public UserMapper getUserMapper() {
return userMapper;
}
public void setUserMapper(UserMapper userMapper) {
this.userMapper = userMapper;
}
public ActivityBean getNewActivity() {
return newActivity;
}
public void setNewActivity(ActivityBean newActivity) {
this.newActivity = newActivity;
}
public ActivityBean getSelectedActivity() {
return selectedActivity;
}
public void setSelectedActivity(ActivityBean selectedActivity) {
this.selectedActivity = selectedActivity;
}
public List<ActivityBean> getActivities() {
return activities;
}
public void setActivities(List<ActivityBean> activities) {
this.activities = activities;
}
public List<UserBean> getUsers() {
return users;
}
public void setUsers(List<UserBean> users) {
this.users = users;
}
}
我的活动豆：
public class ActivityBean implements Serializable {
private Long id = 0L;
private String name;
private String desctription;
private UserBean organiser;
private Calendar startDate;
private Calendar endDate;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDesctription() {
return desctription;
}
public void setDesctription(String desctription) {
this.desctription = desctription;
}
public UserBean getOrganiser() {
return organiser;
}
public void setOrganiser(UserBean organiser) {
this.organiser = organiser;
}
public Calendar getStartDate() {
return startDate;
}
public void setStartDate(Calendar startDate) {
this.startDate = startDate;
}
public Date getStartDateDate() {
if(this.startDate == null) {
return null;
}
return this.endDate.getTime();
}
public void setStartDateDate(Date startDate) {
if(this.startDate == null) {
this.startDate = new GregorianCalendar();
}
this.startDate.setTime(startDate);
}
public String getStartDateString() {
if(this.startDate == null) {
return null;
}
return startDate.get(Calendar.DAY_OF_MONTH) + "/" + startDate.get(Calendar.MONTH) + "/" + startDate.get(Calendar.YEAR) + "";
}
public Calendar getEndDate() {
return endDate;
}
public void setEndDate(Calendar endDate) {
this.endDate = endDate;
}
public Date getEndDateDate() {
if(this.endDate == null) {
return null;
}
return endDate.getTime();
}
public void setEndDateDate(Date endDate) {
if(this.endDate == null) {
this.endDate = new GregorianCalendar();
}
this.endDate.setTime(endDate);
}
public String getEndDateString() {
if(this.endDate == null) {
return null;
}
return endDate.get(Calendar.DAY_OF_MONTH) + "/" + endDate.get(Calendar.MONTH) + "/" + endDate.get(Calendar.YEAR) + "";
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
ActivityBean that = (ActivityBean) o;
if (id != null ? !id.equals(that.id) : that.id != null) return false;
return true;
}
@Override
public int hashCode() {
return id != null ? id.hashCode() : 0;
}
}
我的用户bean：
public class UserBean {
private Long id;
private String username;
private String firstname;
private String lastname;
private String email;
private String phone;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getFirstname() {
return firstname;
}
public void setFirstname(String firstname) {
this.firstname = firstname;
}
public String getLastname() {
return lastname;
}
public void setLastname(String lastname) {
this.lastname = lastname;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
UserBean userBean = (UserBean) o;
if (id != null ? !id.equals(userBean.id) : userBean.id != null) return false;
return true;
}
@Override
public int hashCode() {
return id != null ? id.hashCode() : 0;
}
}
以及 selectOneMenu 使用的转换器：
@Named
public class userConverter implements Converter{
@Inject
private PlannedActivityController activityController;
@Override
public Object getAsObject(FacesContext facesContext, UIComponent uiComponent, String s) {
for (UserBean user : activityController.getUsers()) {
if(user.getId().toString().equals(s)) {
return user;
}
}
return null;
}
@Override
public String getAsString(FacesContext facesContext, UIComponent uiComponent, Object o) {
if(o instanceof UserBean) {
UserBean user = (UserBean)o;
return user.getId().toString();
}
return "";
}
}