Ich versuche, ein Feld zu validieren, indem ich einen Feldwert an ein Servlet sende, und als Antwort erhalte ich Wahr oder Falsch, d. H. Ob dieses Feld gültig ist oder nicht. hier ist meine dialogdatei

  <bodytext
            jcr:primaryType="cq:Widget"
            fieldDescription="Type Text Here"
            fieldLabel="Body Text"
            name="./bodytext"
     validator= "function(value) {   
var dialog = this.findParentByType('dialog');  
var postParams = {};
postParams['value'] = value;

CQ.HTTP.post ('/ bin / feeds / validation.json', Funktion (Optionen, Erfolg, Antwort) {response.valid? True: 'Der Name des Formulars existiert bereits auf dieser Seite.';}, PostParams);
} "xtype =" textarea "/>

und hier ist mein Servlet-Code

import java.io.IOException;

import javax.servlet.ServletException;

import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.SlingHttpServletResponse;
import org.apache.sling.api.servlets.SlingAllMethodsServlet;
import org.apache.sling.api.servlets.SlingSafeMethodsServlet;
import org.apache.sling.commons.json.JSONException;
import org.apache.sling.commons.json.io.JSONWriter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.day.cq.commons.TidyJSONWriter;

public abstract class AbstractValidatorServlet extends SlingAllMethodsServlet {

    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    private static final Logger LOG = LoggerFactory.getLogger(AbstractValidatorServlet.class);


    @Override
    protected final void doPost(final SlingHttpServletRequest request, final SlingHttpServletResponse response)
        throws ServletException, IOException {
        final String value = request.getRequestParameter("value").getString();
       final boolean valid = isValid(value);      
        response.setContentType("application/json");
        response.setCharacterEncoding("utf-8");


        try {
            final TidyJSONWriter writer = new TidyJSONWriter(response.getWriter());
            response.setContentType("application/json");
            //JSONWriter writer = new JSONWriter(response.getWriter());
                    try {
                    writer.object();
                    writer.key("valid").value(valid);
                    writer.endObject(); 

                } catch (JSONException e) {

                    e.printStackTrace();
                }
             }  catch (final IOException ioe) {
            LOG.error("error writing JSON response", ioe);
        }
    }

    /**
     * Validate the given value for this request and path.
     *
     * @param request servlet request
     * @param path path to current component being validated
     * @param value input value to validate
     * @return true if value is valid, false otherwise
     */
    protected abstract boolean isValid(final String value);

}



import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import org.apache.commons.lang.StringEscapeUtils;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Properties;
import org.apache.felix.scr.annotations.Property;
import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.Service;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.tidy.Tidy;

import com.adobe.granite.xss.XSSAPI;

@Component
@Service
@Properties({
    @Property(name="sling.servlet.paths",value="/bin/feeds/validation"),
    @Property(name = "sling.servlet.extensions", value = "json"),
    @Property(name = "sling.servlet.methods", value = "POST"),
    @Property(name = "sling.servlet.selectors", value = "validator"),
    @Property(name = "service.description", value = "XSS API HTML Validator Servlet")
})
public final class HTMLValidatorServlet extends AbstractValidatorServlet {

    private static final long serialVersionUID = 1L;
    private static final Logger LOG = LoggerFactory.getLogger(HTMLValidatorServlet.class);

    @Reference
    XSSAPI xssapi;

    @Override
    protected boolean isValid(final String value) {
            String data = "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">"
                    + "<html xmlns=\"http://www.w3.org/1999/xhtml\"><title></title><body>"+StringEscapeUtils.unescapeHtml(value)+"</body></html>";

            Tidy tidy=new Tidy();
            tidy.setXmlTags(true); 
            tidy.setXHTML(true);
            StringWriter writer = new StringWriter(); 
            tidy.setErrout(new PrintWriter(writer)); 
            ByteArrayInputStream in = new ByteArrayInputStream(data.getBytes()); 
            ByteArrayOutputStream out = new ByteArrayOutputStream(); 
            tidy.parse(in,out); 
            int numErrors = tidy.getParseErrors();
            if(numErrors > 0) 
            { 
                return false;
            }
            else{
            return true;
            }
    }

}

Ich erhalte einen nicht spezifizierten Fehler in cq5. kann irgendjemand wo mir fehlt. Danke im Vorau