JSF f:validateRequired标记

它用于确保本地值在EditableValueHolder组件上不为空。

标签属性

JSF <f：validateRequired>标记示例

// index.xhtml

<h:form id="form">
<h:outputLabel for="username">User Name</h:outputLabel>
<h:inputText id="name-id" value="#{user.name}" validatorMessage="User name is required">
<f:validateRequired />
</h:inputText><br/>
<h:commandButton value="OK" action="response.xhtml"></h:commandButton>
</h:form>

// User.java

import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;
@ManagedBean
@RequestScoped
public class User{
String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}