Question

我想验证数据库中是否存在社会安全号码。这是我的验证者。

@RequestScoped
@FacesValidator("personalIdValidator")
public class PersonalIdValidator implements Validator {

    @EJB
    private UserDaoLocal userDao;

    @Override
    public void validate(FacesContext context, UIComponent component,
            Object value) throws ValidatorException {

        boolean ok;
        String personalId = value.toString();
        String regex = "[0-9]{11}";
        ok = Pattern.matches(regex, personalId);

        if (!ok || userDao.findUserExist(personalId)) {
            throw new ValidatorException(new FacesMessage(FacesMessage.SEVERITY_ERROR, "Błędny pesel", "Błędny pesel"));
        }
    }
}

在Validator中，我有一个@EJB userDao，我做了一个方法userDao.findUserExist(personalId) 这个方法：

@Override
public boolean findUserExist(String personalId) {
    try {
        Query q = em.createQuery("SELECT u FROM User u WHERE u.personalId = :personalId");
        q.setParameter("personalId", personalId);
        user = (User) q.getSingleResult();
        if(user == null) {
            return false;
        } else {
            return true;
        }

    } catch (Exception e) {
        System.out.println("Błąd" + e.getMessage());
        return false;
    }
}

但是当我这样做时，我有一个错误：

警告：StandardWrapperValve [Faces Servlet]：PWC1406： servlet Faces Servlet的Servlet.service（）引发了异常 java.lang.NullPointerException at pl.ePrzychodnia.validators.PersonalIdValidator.validate（PersonalIdValidator.java:41）在javax.faces.component.UIInput.validateValue（UIInput.java:1149）at javax.faces.component.UIInput.validate（UIInput.java:967）at javax.faces.component.UIInput.executeValidate（UIInput.java:1233）at at javax.faces.component.UIInput.processValidators（UIInput.java:698）at at javax.faces.component.UIComponentBase.processValidators（UIComponentBase.java:1214）在 javax.faces.component.UIComponentBase.processValidators（UIComponentBase.java:1214）在 org.primefaces.component.panel.Panel.processValidators（Panel.java:297）在javax.faces.component.UIForm.processValidators（UIForm.java:253）在 javax.faces.component.UIComponentBase.processValidators（UIComponentBase.java:1214）在 javax.faces.component.UIComponentBase.processValidators（UIComponentBase.java:1214）在 javax.faces.component.UIViewRoot.processValidators（UIViewRoot.java:1172）在 com.sun.faces.lifecycle.ProcessValidationsPhase.execute（ProcessValidationsPhase.java:76）在com.sun.faces.lifecycle.Phase.doPhase（Phase.java:101）at com.sun.faces.lifecycle.LifecycleImpl.execute（LifecycleImpl.java:118）在javax.faces.webapp.FacesServlet.service（FacesServlet.java:593）at org.apache.catalina.core.StandardWrapper.service（StandardWrapper.java:1550）在 org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:281）在 org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:175）在 org.apache.catalina.core.StandardPipeline.doInvoke（StandardPipeline.java:655）在 org.apache.catalina.core.StandardPipeline.invoke（StandardPipeline.java:595）在 org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:161）在 org.apache.catalina.connector.CoyoteAdapter.doService（CoyoteAdapter.java:331）在 org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:231）在 com.sun.enterprise.v3.services.impl.ContainerMapper $ AdapterCallable.call（ContainerMapper.java:317）在 com.sun.enterprise.v3.services.impl.ContainerMapper.service（ContainerMapper.java:195）在 com.sun.grizzly.http.ProcessorTask.invokeAdapter（ProcessorTask.java:860）在 com.sun.grizzly.http.ProcessorTask.doProcess（ProcessorTask.java:757）在 com.sun.grizzly.http.ProcessorTask.process（ProcessorTask.java:1056）在 com.sun.grizzly.http.DefaultProtocolFilter.execute（DefaultProtocolFilter.java:229）在 com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter（DefaultProtocolChain.java:137）在 com.sun.grizzly.DefaultProtocolChain.execute（DefaultProtocolChain.java:104）在 com.sun.grizzly.DefaultProtocolChain.execute（DefaultProtocolChain.java:90）在 com.sun.grizzly.http.HttpProtocolChain.execute（HttpProtocolChain.java:79）在 com.sun.grizzly.ProtocolChainContextTask.doCall（ProtocolChainContextTask.java:54）在 com.sun.grizzly.SelectionKeyContextTask.call（SelectionKeyContextTask.java:59）在com.sun.grizzly.ContextTask.run（ContextTask.java:71）at com.sun.grizzly.util.AbstractThreadPool $ Worker.doWork（AbstractThreadPool.java:532）在 com.sun.grizzly.util.AbstractThreadPool $ Worker.run（AbstractThreadPool.java:513）在java.lang.Thread.run（Thread.java:722）

Answer 1

第一个：

替换

String personalId = value.toString();

通过

String confirm = (String) component.getAttributes().get("theInputFromYourPage");

你也可以试试这个：

private static final String regex = "[0-9]{11}";
private Pattern pattern;
private Matcher matcher;

public PersonalIdValidator() {
    pattern = Pattern.compile(regex);
}

public void validate(FacesContext context, UIComponent component,
        Object value) throws ValidatorException {
    // TODO Auto-generated method stub
    matcher = pattern.matcher(value.toString());
    if (!matcher.matches()) {


        // DO YOUR STUFF QUERY


    } else {
                    // FacesMessages, invite the user to respect regex [0-9]{11}
            }
}

Validator JSF中的EJB bean

1 个答案: