Center component on jsf page

问题

I was trying to center the component in jsf page, it looks sth like this:

<p:panel header="Enter your credentials:" style="vertical-align:middle;">

    <h:panelGrid columns="2" styleClass="panelGridCenter">
                <h:outputText value="Login: " />
                <p:inplace id="Login">
                    <p:inputText value="Enter login" />
                </p:inplace>
            </h:panelGrid>
    </p:panel>

I've tried to enter sth like this:

style="vertical-align:middle;"

I've tried to use a css class (I've had almost no experience with css):

.panelGridCenter {
      margin: 0 auto;
      vertical-align:middle;
}

But it doesn't work. Can you give me any examples or hints how to position this component (panel) in the center of the jsf page?

p - primefaces

thx in advance

回答1:

Try below code I will hope this answer be your question

<h:form>            
        <table width="100%" cellpadding="0" cellspacing="0" border="0" align="center"  class="outer_table">
            <tr>
                <td>
                    <table width="500" height="300" cellpadding="0" cellspacing="0" border="0" align="center">
                        <tr>
                            <td align="center">
                                <p:panel header="Login">
                                    <h:panelGrid columns="2" cellpadding="5">

                                        <h:outputLabel for="username" value="username" />
                                        <p:inputText id="username" value="#{loginBean.uname}" required="true" label="username"/>

                                        <h:outputLabel for="password" value="password" />
                                        <p:password id="password" value="#{loginBean.password}" required="true" label="password" />

                                        <p:commandButton value="Login"  action="#{loginBean.loginProject}" update=":growl"/>

                                    </h:panelGrid>
                                </p:panel>
                            </td>
                        </tr>
                    </table>
                </td>
            </tr>
        </table>
    </h:form>

css

<script type="text/css">
    html, body
    {
        margin:0px;
        padding:0px;
        width:100%;
        min-height:100%;
        height:100%;
    }
    .outer_table
    {
        width:100%;
        height:100%;
    }
</script>

回答2:

This may be irrelevant as I cannot answer your question, but a dialog (centered by default) looks pretty cool for a login-page:

    <h:body>
        <p:growl id="growl" life="5000" autoUpdate="true" showDetail="true" escape="false"/>

        <h:form>    
            <p:dialog id="dialog" header="Login" footer="..." width="400" widgetVar="dlg" visible="true" closable="false" showEffect="clip" draggable="false" resizable="false" style="box-shadow: 7px 10px 5px #303030;"> 

                    <p:panelGrid columns="2" style="margin: 0 auto">
                        <h:outputText value="username:"/>            
                        <h:inputText value="#{loginBean.username}" id="username"/>            
                        <h:outputText value="password:"/>            
                        <h:inputSecret value="#{loginBean.password}" id="password"/>            
                    </p:panelGrid>
                    <p:commandButton  id="button" value="Login" action="#{loginBean.doLogin}" style="float:right"/>            

            </p:dialog>
        </h:form>   
    </h:body>

visible="true" makes the dialog show automatically after load.

Inspired by this article, also showing how to secure parts of the application.

回答3:

I am not an expert but sharing my own experience. After putting the panel into form, try putting the form into div with style as below:

<div style="width:360px; margin: 10% auto 10% auto;">
<h:form>
    ....
</h:form>
</div>

来源：https://stackoverflow.com/questions/24314745/center-component-on-jsf-page

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