在PrimeFaces表单中验证后,JSF转换器不起作用

时间:2012-04-09 15:40:11

标签: java jsf primefaces converter

我正在使用JSF 2.1和PrimeFaces 3.2,服务器Tomcat 7开发应用程序。现在,我正在使用表单来注册新用户。问题出在转换器上。

我使用的标准字段很少,其中两个是密码。我有密码的自定义数据类型,所以我想使用转换器将字符串数据从字段转换为Bean中的Password变量。 Primefaces表单在提交后使用AJAX,可能存在问题。如果我完全填写表格,没有验证错误,一切正常。但是如果存在验证错误并且没有转换器错误(我检查转换器中的密码长度),则整个表单将停止工作。我必须刷新页面才能让它再次运行。

以下是一些消息来源:

密码类:

public class Password {

    public static final short MIN_LENGTH = 5;

    private String text;
    private String hash;

    public Password(String text) {
        this.text = text;
        this.hash = Hasher.sha512(text);
    }

    /**
     * Get password instance with known hash only
     * @param hash SHA-512 hash
     * @return Password instance
     */
    public static Password getFromHash(String hash) {
        Password password = new Password(null);
        password.hash = hash;
        return password;
    }



    @Override
    public int hashCode() {
        return hash.hashCode();
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        final Password other = (Password) obj;
        if ((this.hash == null) ? (other.hash != null) : !this.hash.equals(other.hash)) {
            return false;
        }
        return true;
    }

    @Override
    public String toString() {
        return hash;
    }

    /**
     * @return the text
     */
    public String getText() {
        return text;
    }
}

密码转换器:

@FacesConverter(forClass = Password.class)
public class PasswordConverter implements Converter {

    @Override
    public Object getAsObject(FacesContext context, UIComponent component, String value) {
        String text = (String) value;

        if (text.length() >= Password.MIN_LENGTH) {
            return new Password(text);
        }

        FacesMessage msg = new FacesMessage(Texter.get("forms/forms", "shortPassword").replace("%limit%", String.valueOf(Password.MIN_LENGTH)));
        msg.setSeverity(FacesMessage.SEVERITY_ERROR);
        throw new ConverterException(msg);
    }

    @Override
    public String getAsString(FacesContext context, UIComponent component, Object value) {
        try {
            Password password = (Password) value;
            return password.getText();
        } catch (Exception ex) {
            throw new ConverterException(ex);
        }
    }
}

facelet中的表单:

<h:form id="registration">
    <p:panelGrid columns="3">

        <h:outputLabel value="#{commonTxt.email}:" for="email" />
        <p:inputText id="email" value="#{userRegistrationForm.email}" required="true" requiredMessage="#{formsTxt.msgEmpty}">
            <f:validator validatorId="email" />

            <f:validator validatorId="unique" />
            <f:attribute name="entity" value="SystemUser" />
            <f:attribute name="field" value="email" />
            <f:attribute name="uniqueMessage" value="#{formsTxt.nonUniqueEmail}" />
        </p:inputText>
        <p:message for="email" />

        <h:outputLabel value="#{usersTxt.password}:" for="password" />
        <p:password id="password" value="#{userRegistrationForm.password}" binding="#{password}" autocomplete="off" feedback="true" weakLabel="#{formsTxt.passwordWeak}" goodLabel="#{formsTxt.passwordGood}" strongLabel="#{formsTxt.passwordStrong}" promptLabel="#{formsTxt.passwordPrompt}" />
        <p:message for="password" />

        <h:outputLabel value="#{usersTxt.passwordCheck}:" for="passwordCheck" />
        <p:password id="passwordCheck" value="#{userRegistrationForm.passwordCheck}" binding="#{passwordCheckInput}" autocomplete="off">
            <f:validator validatorId="match" />
            <f:attribute name="matchAgainst" value="#{password}" />
            <f:attribute name="matchMessage" value="#{formsTxt.passwordMismatch}" />
        </p:password>
        <p:message for="passwordCheck" />

        <p:column /><p:column /><p:column />

        <h:outputLabel value="#{usersTxt.name}:" for="name" />
        <p:inputText id="name" value="#{userRegistrationForm.name}" maxlength="255" required="true" requiredMessage="#{formsTxt.msgEmpty}" />
        <p:message for="name" />


        <f:facet name="footer">
            <p:commandButton value="#{usersTxt.register}" action="#{userRegistrationForm.register()}" update="registration" />
        </f:facet>
    </p:panelGrid>
</h:form>

我不会发布bean #{userRegistrationForm}的代码,有两个带有getter和setter的Passwords属性。

任何有助于解决我的问题的帮助表示赞赏。提前谢谢。

1 个答案:

答案 0 :(得分:1)

解决!我刚用FacesContext.getCurrentInstance().isValidationFailed()来查看验证是否失败。如果发生故障,转换器现在返回null(转换将不会完成),在其他情况下转换器将返回适当的对象。并且表单在转换工作时工作正常。