我正在开发使用JSF 2.0和Glassfish的纯Javaee6应用程序。我的JSF实施是PrimeFaces(在Glassfish提供的Mojarra旁边)。

我想验证JSF表单中2个密码字段的值是否相等。使用接缝,有整洁的组件 <s:validateEquality for="pw1"/>。我只想使用JSF(或JSF库的组成部分),而无需接缝。到目前为止,我只看到了用自定义验证器验证表单的示例。但是我想在不编写Java代码或JavaScript代码的情况下比较字段。那可能吗?

这是接缝的样子:

...
<h:inputSecret id="passwort" value="#{personHome.instance.password}" 
    redisplay="true" required="true">
  <f:validateLength minimum="8"/>
  <a:support event="onblur" reRender="passwortField" bypassUpdates="true" ajaxSingle="true" />
</h:inputSecret>
...    
<h:inputSecret id="passwort2" required="true" redisplay="true">
  <!-- find the JSF2.0-equivalent to this tag: -->
  <s:validateEquality for="passwort"/>
  <a:support event="onblur" reRender="passwort2Field" bypassUpdates="true" ajaxSingle="true" />
</h:inputSecret>
...
有帮助吗?

解决方案 5

这就是我最终做到的方式,因为它很简单。唯一的问题是它不是真正可重复使用的,但是由于我只需要一个情况,所以我宁愿保存一些LOC,然后这样做。从我的角度来看:

<h:inputSecret id="password" value="#{personHome.person.password}">
  <f:ajax event="blur" render="passwordError" />
</h:inputSecret> 
<h:message for="password" errorClass="invalid" id="passwordError" />

<h:inputSecret id="password2" validator="#{personHome.validateSamePassword}">
  <f:ajax event="blur" render="password2Error" />
</h:inputSecret> 
<h:message for="password2" errorClass="invalid" id="password2Error" />

我的支持豆(只是重要的部分):

@Named @ConversationScoped
public class PersonHome {
  private Person person;

  public Person getPerson() {
    if (person == null) return new Person();
    else return person;
  }

  public void validateSamePassword(context:FacesContext, toValidate:UIComponent, value:Object) {
    String confirmPassword = (String)value;
    if (!confirmPassword.equals(person.getPassword()) {
      FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_ERROR, "Passwords do not match!", "Passwords do not match!")
      throw new Validatorexception(message);
    }
  }

其他提示

Seam3面对模块 将支持即将发布的alpha3版本中的“跨场验证”。这是您最少代码解决方案的最佳选择,请参阅此信息 博客 howto。

另外,我通过使用f:属性标签将另一个表单字段的客户端传递给自定义验证器,然后使用传递到自定义验证器中的uicomponent访问ID提交的另一个。

这是facelet文件:

<h:outputLabel value="Enter your email address" rendered="#{!cc.attrs.registration.subRegistration}" />
<h:inputText label="Email" id="textEmail1" value="#{cc.attrs.registration.email}" rendered="#{!cc.attrs.registration.subRegistration}" required="true" maxlength="128" size="35"></h:inputText>
<h:message for="textEmail1" rendered="#{!cc.attrs.registration.subRegistration}"></h:message>

<h:outputLabel value="Re-enter your email address confirmation:" rendered="#{!cc.attrs.registration.subRegistration and cc.attrs.duplicateEmailRequired}" />
<h:inputText label="Email repeat" id="textEmail2" rendered="#{!cc.attrs.registration.subRegistration and cc.attrs.duplicateEmailRequired}" maxlength="64" size="35">
    <f:validator validatorId="duplicateFieldValidator" />
    <f:attribute name="field1Id" value="#{component.parent.parent.clientId}:textEmail1" />
</h:inputText>
<h:message for="textEmail2" rendered="#{!cc.attrs.registration.subRegistration and cc.attrs.duplicateEmailRequired}"></h:message>

这是验证器类:

package ca.triumf.mis.trevents.jsf.validator;

import javax.faces.application.FacesMessage;
import javax.faces.component.UIComponent;
import javax.faces.component.UIInput;
import javax.faces.context.FacesContext;
import javax.faces.validator.FacesValidator;
import javax.faces.validator.Validator;
import javax.faces.validator.ValidatorException;

@FacesValidator(value="duplicateFieldValidator")
public class DuplicateFieldValidator implements Validator {

@Override
public void validate(FacesContext context, UIComponent component, Object value)
        throws ValidatorException {
    // Obtain the client ID of the first field from f:attribute.
    System.out.println(component.getFamily());
    String field1Id = (String) component.getAttributes().get("field1Id");

    // Find the actual JSF component for the client ID.
    UIInput textInput = (UIInput) context.getViewRoot().findComponent(field1Id);
    if (textInput == null)
        throw new IllegalArgumentException(String.format("Unable to find component with id %s",field1Id));
    // Get its value, the entered text of the first field.
    String field1 = (String) textInput.getValue();

    // Cast the value of the entered text of the second field back to String.
    String confirm = (String) value;

    // Check if the first text is actually entered and compare it with second text.
    if (field1 != null && field1.length() != 0 && !field1.equals(confirm)) {
        throw new ValidatorException(new FacesMessage("E-mail addresses are not equal."));
    }
}
}

您可以以这种非常简单的方式使用PrimeFaces标签:

<p:password id="password" value="#{bean.password}" match="repeated_password" />

<p:password id="repeated_password" value="#{bean.password}" />

我不得不使用两个答案的混合物才能成功。

我使用了Ifischers简短解决方案,但我的BEAN密码字段为空。

因此,我使用Brian Leathem的线从上下文中获取UIInput:

public void passwordValidator(FacesContext context, UIComponent toValidate, Object value) {

    UIInput passwordField = (UIInput) context.getViewRoot().findComponent("registerForm:password");
    if (passwordField == null)
        throw new IllegalArgumentException(String.format("Unable to find component."));
    String password = (String) passwordField.getValue();
    String confirmPassword = (String) value;
    if (!confirmPassword.equals(password)) {
        FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_ERROR, "Passwords do not match!", "Passwords do not match!");
        throw new ValidatorException(message);
    }
}

如果您正在使用JSF公用事业库 综合, ,那么您可以使用 <o:validateEqual>. 。它还允许设置自定义消息。这 展示 有一个现场示例,说明验证密码确认的常见用户酶。在调用验证器之前,您甚至不需要Ajax来更新模型(AS 您自己的方法 做)。

这是必要的最低代码:

<h:inputSecret id="password" value="#{personHome.person.password}" />
<h:message for="password" />

<h:inputSecret id="password2" />
<h:message for="password2" />

<o:validateEqual components="password password2" 
    message="Passwords do not match!" showMessageFor="password2" />

无需Java代码。

您可以使用Apache Myfaces Extval轻松完成。

编辑: :在阅读之前,请考虑一下此解决方案非常有效,答案是从2012年7月开始的,所以请不要因为您不喜欢它而投票给我。世界改变了,现在我们拥有更好的组成部分和解决方案。

没有解决方案,我被迫以丑陋的方式进行验证(不建议)。至少它可以工作直到找到更好的解决方案。

在返回操作的方法中,我检查两个值,如果值不同,则在上下文上添加错误消息,然后将NULL返回到导航处理程序。

package com.jsf.beans.user;

import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;
import javax.faces.component.html.HtmlInputSecret;

import org.apache.commons.lang.StringUtils;

import com.pichler.jsf.beans.base.JsfViewBean;

 @ManagedBean(name = "changePassword")
 @RequestScoped
 public class ChangePassword extends JsfViewBean {
private HtmlInputSecret inputSecret1, inputSecret2;

/**
 * @return the inputSecret1
 */
public HtmlInputSecret getInputSecret1() {
    return inputSecret1;
}

/**
 * @param inputSecret1
 *            the inputSecret1 to set
 */
public void setInputSecret1(HtmlInputSecret inputSecret1) {
    this.inputSecret1 = inputSecret1;
}

/**
 * @return the inputSecret2
 */
public HtmlInputSecret getInputSecret2() {
    return inputSecret2;
}

/**
 * @param inputSecret2
 *            the inputSecret2 to set
 */
public void setInputSecret2(HtmlInputSecret inputSecret2) {
    this.inputSecret2 = inputSecret2;
}

private String password1, password2;

public String alterar() {
    if (!StringUtils.equals(password1, password2)) {
        addErrorMessage(inputSecret1.getClientId(),
                "As senhas não coincidem");
        addErrorMessage(inputSecret2.getClientId(),
                "As senhas não coincidem");
        return null;
    }
    return null;
}

/**
 * @return the password1
 */
public String getPassword1() {
    return password1;
}

/**
 * @param password1
 *            the password1 to set
 */
public void setPassword1(String password1) {
    this.password1 = password1;
}

/**
 * @return the password2
 */
public String getPassword2() {
    return password2;
}

/**
 * @param password2
 *            the password2 to set
 */
public void setPassword2(String password2) {
    this.password2 = password2;
}

}

*JSFViewBean只是一个具有一些常见方法的类,例如“ addMessages”。

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