我有带p:datatble的jsf页面和用于添加/更新/删除表格数据的控制按钮。当用户点击按钮时，会显示p:dialog。
这是我的users.xhtml：
<h:form id="form">
<!-- Table for displayng users information -->
<p:dataTable id="users" var="user" value="#{usersBean.users}" selectionMode="single"
selection="#{usersBean.selected}" rowKey="#{user.id}">
<!-- Controls -->
<f:facet name="header">
<p:commandButton id="addButton" value="New" oncomplete="addUser.show()"
update=":form:newUser"/>
<p:commandButton id="updbutton" value="Update" oncomplete="updUser.show()"
update=":form:updateUser" action="#{usersBean.constructUser}"/>
<p:commandButton id="delButton" value="Delete" oncomplete="delUser.show()"
update=":form:delDialog"/>
</f:facet>
<p:column>
<f:facet name="header">
Login
</f:facet>
<h:outputText value="#{user.login}"/>
</p:column>
<p:column>
<f:facet name="header">
Password
</f:facet>
<h:outputText value="#{user.password}"/>
</p:column>
<p:column>
<f:facet name="header">
Name
</f:facet>
<h:outputText value="#{user.name}"/>
</p:column>
<p:column>
<f:facet name="header">
Surname
</f:facet>
<h:outputText value="#{user.surname}"/>
</p:column>
<p:column>
<f:facet name="header">
Role
</f:facet>
<h:outputText value="#{user.role}"/>
</p:column>
<f:facet name="footer">
<p:commandButton value="CVS" ajax="false">
<p:dataExporter target="users" type="csv" fileName="Users"/>
</p:commandButton>
</f:facet>
</p:dataTable>
<!-- Dialog for adding new User -->
<p:dialog id="addDialog" header="Add new user" widgetVar="addUser" resizable="false"
width="400" showEffect="clip" hideEffect="fold">
<h:panelGrid id="newUser" columns="2" cellpadding="4">
<p:outputLabel for="newLogin" value="Login :"/>
<p:inputText id="newLogin" value="#{usersBean.newUser.login}"/>
<p:outputLabel for="newPassword" value="Password :"/>
<p:inputText id="newPassword" value="#{usersBean.newUser.password}"/>
<p:outputLabel for="newName" value="Name :"/>
<p:inputText id="newName" value="#{usersBean.newUser.name}"/>
<p:outputLabel for="newSurname" value="Surname :"/>
<p:inputText id="newSurname" value="#{usersBean.newUser.surname}"/>
<p:outputLabel for="newRole" value="Role :"/>
<p:selectOneMenu id="newRole" value="#{usersBean.newUser.role}">
<f:selectItems value="#{usersBean.roles}"/>
</p:selectOneMenu>
<f:facet name="footer">
<p:commandButton value="Save" actionListener="#{usersBean.addUser}"
update=":form:users"
oncomplete="addUser.hide()"/>
</f:facet>
</h:panelGrid>
</p:dialog>
<!-- Dialog for deleting User -->
<p:confirmDialog id="delDialog" message="Are You sure to delete
#{usersBean.selected.name} user?" widgetVar="delUser" resizable="false"
width="400" showEffect="clip" hideEffect="fold">
<p:commandButton id="confirm" value="Yes" action="#{usersBean.delete}"
update=":form:users" onclick="delUser.hide()"/>
<p:commandButton id="declice" value="No" onclick="delUser.hide()"/>
</p:confirmDialog>
<!-- Dialog for updating User information -->
<p:dialog id="updDialog" header="Update user information" widgetVar="updUser"
resizable="false" width="400" showEffect="clip" hideEffect="fold">
<h:panelGrid id="updateUser" columns="2" cellpadding="4">
<p:outputLabel for="updLogin" value="Login :"/>
<p:inputText id="updLogin" value="#{usersBean.updated.login}"/>
<p:outputLabel for="updPassword" value="Password :"/>
<p:inputText id="updPassword" value="#{usersBean.updated.password}"/>
<p:outputLabel for="updName" value="Name :"/>
<p:inputText id="updName" value="#{usersBean.updated.name}"/>
<p:outputLabel for="updSurname" value="Surname :"/>
<p:inputText id="updSurname" value="#{usersBean.updated.surname}"/>
<p:outputLabel for="updRole" value="Role :"/>
<p:selectOneMenu id="updRole" value="#{usersBean.updated.role}">
<f:selectItems value="#{usersBean.roles}"/>
</p:selectOneMenu>
<f:facet name="footer">
<p:commandButton value="Update" action="#{usersBean.updUser}"
update=":form:users" onclick="updUser.hide()"/>
</f:facet>
</h:panelGrid>
</p:dialog>
</h:form>
我的托管bean：
@ManagedBean(name = "usersBean")
@ViewScoped
public class UsersController {
private List<String> roles;
private UserDAO userDAO;
private List<UserEnt> users;
private UserEnt newUser;
private UserEnt selected;
private UserEnt updated;
public UsersController() {
userDAO = new UserDAO();
newUser = new UserEnt();
selected = new UserEnt();
updated = new UserEnt();
}
public UserEnt getNewUser() {
return newUser;
}
public void setNewUser(UserEnt newUser) {
this.newUser = newUser;
}
public List<UserEnt> getUsers() {
return users;
}
public void setUsers(List<UserEnt> users) {
this.users = users;
}
public List<String> getRoles() {
return roles;
}
public void setRoles(List<String> roles) {
this.roles = roles;
}
public UserEnt getSelected() {
return selected;
}
public void setSelected(UserEnt selected) {
this.selected = selected;
}
public UserEnt getUpdated() {
return updated;
}
public void setUpdated(UserEnt updated) {
this.updated = updated;
}
@PostConstruct
public void initData() {
roles = new ArrayList<String>();
roles.add("ROLE_USER");
roles.add("ROLE_ADMIN");
users = userDAO.getListOfUsers();
}
public void constructUser() {
updated = selected;
}
public void addUser() {
userDAO.saveNewUser(newUser);
users = userDAO.getListOfUsers();
}
public void delete() {
userDAO.deleteUser(selected);
users = userDAO.getListOfUsers();
}
public void updUser() {
userDAO.updateUser(updated);
users = userDAO.getListOfUsers();
}
}
如果在p:dialog
p:datatable？
答案 0 :(得分：1)
更改您的更新按钮，如：
<p:commandButton id="updbutton" value="Update" oncomplete="handleRequest(xhr, status, args)"
update=":form:updateUser" action="#{usersBean.constructUser}"/>
并添加如下脚本：
<script type="text/javascript">
function handleRequest(xhr, status, args) {
if(!args.noUserSelected) {
updUser.show()
}
}
</script>
在你的bean类中，进行如下更改。
public void constructUser() {
/*ADD SOME LOGIC TO CHECK if selected is initializeded with values based on if selected is not initialized with values add callback parameter RequestContext.getCurrentInstance().addCallbackParam("noUserSelected", true);*/
updated = selected;
}
这样你就可以在js函数中得到这个参数，并且不会显示对话框。
HTH，