问题
I am using zk ce version 6.5 and i have a problem. My login/index pages is being loaded twice.
when i on logout button call this:
Executions.createComponents("login", center, null);
above page has two fields and i am using MVVM approach.
Now it loads fine, but as soon as i enter the username in the textbox or enter the password in textbox, page is automatically refreshed. I have checked in my code, i am not calling the above method anywhere else in a process here.
Please tell me why on textbox/password textbox i am getting this behaviour for the loginpage. once it's reloaded twice, it gets the username and takes me to home page. now i logout and same scenario.
for two times, i am getting call to this method, once is obvious, bacause on logout i called it, but on entering any text in textbox and removing the focus from it. then this method is again called.
@AfterCompose
public void afterCompose(@ContextParam(ContextType.VIEW) Component view){
Selectors.wireComponents(view, this, false);
}
I have inspected my code too, there is no event on any of the textfield.
login.zul
<zk>
<window id="loginWin" border="none" width="100%" height="100%"
apply="org.zkoss.bind.BindComposer"
viewModel="@id('vmc') @init('com.example.LoginViewModel')"
validationMessages="@id('vmsgs')">
<borderlayout>
<west border="normal" size="70%" title="What Intelliops Do?">
<div width="100%" height="100%">
asdasd as asd a d asdasd a sd asd asasd asd d asdasd as
d a d asdasd a sd asd asasd asd a d asdasd a sd asd
asasd asd a d asdasd a sd asd asasd asd
</div>
</west>
<east border="normal" size="30%" title="Login">
<div width="100%" height="100%">
<grid sizedByContent="true"
form="@id('lv') @load(vmc.userDto)
@save(vmc.userDto, before='loginButtonInvoke')
@validator('com.example.LoginValidator')">
<columns>
<column width="50%"></column>
<column width="50%"></column>
</columns>
<rows>
<row align="left" width="100%"
style="background:white;.row:hover{background-color: #fff};border:none">
<cell style="text-align:right">
User Name
</cell>
<cell>
<textbox id="userNameTextBox" type="text"
value="@bind(lv.user.username)" maxlength="50" />
<image src="@load(vmsgs['userNameTextBoxError'])" width="12px"
height="12px" tooltiptext="@load(vmsgs['userNameTextBox'])"></image>
</cell>
</row>
<row width="100%"
style="background:white;.row:hover{background-color: #fff};border:none">
<cell style="text-align:right">
Password
</cell>
<cell>
<textbox id="passwordTextBox" type="password"
value="@bind(lv.user.password)" maxlength="20" />
<image src="@load(vmsgs['passwordTextBoxError'])" width="12px"
height="12px" tooltiptext="@load(vmsgs['passwordTextBox'])" />
</cell>
</row>
<row width="100%"
style="background:white;.row:hover{background-color: #fff};border:none">
<cell style="text-align:right">
<button id="loginButton" label="Login"
onClick="@command('loginButtonInvoke')" />
</cell>
<cell>
<label id="loginErrorLabel" style="color:red" />
</cell>
</row>
<row spans="2" width="100%"
style="background:white;.row:hover{background-color: #fff};border:none">
<cell colspan="2" style="text-align:right">
<a id="forgetPasswordLink">
Forgot Password?
</a>
</cell>
</row>
</rows>
</grid>
</div>
</east>
</borderlayout>
</window>
</zk>
loginviewmode class
package com.example;
import org.apache.log4j.Logger;
import org.zkoss.bind.annotation.AfterCompose;
import org.zkoss.bind.annotation.Command;
import org.zkoss.bind.annotation.ContextParam;
import org.zkoss.bind.annotation.ContextType;
import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.select.Selectors;
import org.zkoss.zk.ui.select.annotation.Wire;
import org.zkoss.zkplus.spring.SpringUtil;
import org.zkoss.zul.Label;
import org.zkoss.zul.Textbox;
import com.example.UserDTO;
import com.example.IUserService;
import example.Pages;
import example.TemplateUtil;
import example.UserUtil;
public class LoginViewModel{
private Logger logger = Logger.getLogger(this.getClass().getName());
IUserService userService = (IUserService)SpringUtil.getBean("userService");
UserDTO userDto = new UserDTO();
private static final String USER_ROLES = "userRoles";
private static final String MASTER = "master";
@Wire("#userNameTextBox")
Textbox userNameTextBox;
@Wire("#passwordTextBox")
Textbox passwordTextBox;
@Wire("#loginErrorLabel")
Label loginErrorLabel;
@AfterCompose
public void afterCompose(@ContextParam(ContextType.VIEW) Component view){
Selectors.wireComponents(view, this, false);
}
@Command("loginButtonInvoke")
public void loginButtonInvoke(){
logger.info("LoginViewModel:afterCompose >>>>>>>>>>>>>>>");
logger.info("loginButtonInvoke: " + userDto.getUserIntelliOps().getUsername() + " " + userDto.getUserIntelliOps().getPassword());
userDto = userService.getUserAuthentication(userDto);
if(userDto!=null){
UserUtil.setSession(userDto);
logger.info("loginButtonInvoke:userDto!=null ");
/*List<ViewObjectOperation> list = userService.getAllOtherOperationsService().userAuthorizationMatrix(userDto.getUserIntelliOps().getRoles().get(0).toString());*/
//List<ViewObjectOperation> list = userService.getAllOtherOperationsService().userAuthorizationMatrix(3+"");
//logger.info("asdasdas " + list.size());
/*getUserAuthorizedMenu*/
//TODO what is the following line doing here????
userService.getUserAuthorizedMenu();
TemplateUtil.loadContent(Pages.HOME_FILE,true);
}else{
if(userDto==null){
userDto = new UserDTO();
}
loginErrorLabel.setValue("Invalid username or password.");
}
}
public UserDTO getUserDto() {
return userDto;
}
public void setUserDto(UserDTO userDto) {
this.userDto = userDto;
}
}
TemplateUtil class to draw the pages
package com.example;
import org.apache.log4j.Logger;
import org.zkoss.zk.ui.Executions;
import org.zkoss.zk.ui.Path;
import org.zkoss.zul.A;
import org.zkoss.zul.Borderlayout;
import org.zkoss.zul.Button;
import org.zkoss.zul.Center;
import org.zkoss.zul.Include;
import org.zkoss.zul.North;
public class TemplateUtil {
static Logger logger = Logger.getLogger(TemplateUtil.class.getName());
public static void loadContent(String contentPage, boolean isMenu) {
logger.info("TemplateUtil: loadContent().......... ");
Borderlayout mainlayout = (Borderlayout) Path.getComponent("/main/mainLayout");
North topHeader = mainlayout.getNorth();
topHeader.getFellow("menuDiv").setVisible(isMenu);
//TODO remove the following logger
if(isMenu==true ){
anchorUsername.setLabel(UserUtil.getUserName());
logger.info("isMenu==true....");
Executions.createComponents(Pages.MENU_FILE, topHeader.getFellow("menuDiv"), null);
UserUtil.setSession(true);
}
topHeader.invalidate();
Center center = mainlayout.getCenter();
center.getChildren().clear();
logger.info("contentPage: " + contentPage);
Executions.createComponents(contentPage, center, null);
}
}
please help me on this
Let me update you. 1. first time no refresh 2. after login, when i click on logout and go to login page, as soon as i add the value in any of the textbox, pages refreshes. no action is written on any of those fields.
回答1:
I am not able to understand why you are doing ...
Executions.createComponents("login", center, null);
When you going for logout
From my understanding you can do this thing like this...
//Executions.getCurrent().getDesktop().invalidate();//Condition base if you needed use it otherwise dont use it
Executions.getCurrent().getSession().invalidate();
Executions.sendRedirect("/login.zul");
来源：https://stackoverflow.com/questions/15269086/my-login-index-zul-page-is-loading-twice-where-as-i-am-only-calling-it-once