自定义迭代器在JSF1.0中运行良好，而在JSF2.0中不起作用

Question

我们正在将我的应用程序从JSF1.0迁移到JSF2.0。

在JSF1.0中，我们有自定义迭代器类，它将用于在JSP页面上显示List值。

如果我们在JSF2.0中使用相同的自定义转换器，则List的最后一条记录会在所有行中重复显示。

以下是输出的屏幕截图。该列表包含4个对象，最后一个对象的值为“test4”和“abc4”

我们在JSF2运行时使用JSP作为视图。

FirstName LastName test4 abc4 test4 abc4 test4 abc4 test4 abc4

这是自定义迭代器自定义标记。

package com.util;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;

import javax.el.ValueExpression;
import javax.faces.context.FacesContext;
import javax.faces.el.ValueBinding;
import javax.faces.webapp.UIComponentBodyTag;
import javax.faces.webapp.UIComponentELTag;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;


    /**
     * Custom JSF Iterator Tag
     */

    public class CustomIterator
        extends
            UIComponentELTag
    {
        /**
         * <p>
         *  Thread Safety: @ThreadSafe
         * </p> 
      */
        /*private final static Logger LOGSERVICE = Logger
            .getInstance(CustomIterator.class.getName());*/

        /**
         * The Iterator.
         */
        private Iterator iterator;

        /**
         * The data.
         */
        private Object values;

        /**
         * The data tag attribute.
         */
        private String data;

        /**
         * The temporary storage name.
         */
        private String var;

        private ValueExpression ve;

        public ValueExpression getVe() {
            return ve;
        }

        public void setVe(ValueExpression ve) {
            this.ve = ve;
        }

        /**
         * Default Constructor.
         */
        public CustomIterator()
        {
        }

        public String getComponentType()
        {
            return null;
        }

        public String getRendererType()
        {
            return null;
        }

        public void setData(String data)
        {
            this.data = data;
        }

        public String getData()
        {
            return data;
        }

        public void setVar(String var)
        {
            this.var = var;
        }

        public String getVar()
        {
            return var;
        }

        /**
         * Start tag encoder.
         * 
         * @return indication to render.
         */
        public int doStartTag()
        {
            final String methodName = "doStartTag";

            FacesContext context = FacesContext.getCurrentInstance();
            if (isValueReference(data))
            {
                //ValueBinding vb = context.getApplication().createValueBinding(data);

                ValueExpression ve12 = context.getApplication().getExpressionFactory().createValueExpression(context.getELContext(), data, ArrayList.class);
                if (ve12 != null)
                {
                    //values = vb.getValue(context);

                    values = ve12.getValue(getELContext());
                }
                else
                {
                    return SKIP_BODY;
                }
            }
            else
            {
                throw new NullPointerException();
            }

            if ((null != values) && (values instanceof List))
            {
                List list = (List) values;
                if (null == iterator)
                {
                    iterator = list.iterator();
                }
                //ValueBinding vb = null;
                //ValueExpression ve = null;
                Object obj = null;
                if (iterator.hasNext())
                {
                    obj = iterator.next();

                    ve = context.getApplication().getExpressionFactory().createValueExpression(context.getELContext(), UtilConstants.EXPRESSION_OPEN_STR
                            + var
                            + UtilConstants.EXPRESSION_CLOSE_STR, Object.class);

                    ve.setValue(getELContext(), obj);
                    return EVAL_BODY_INCLUDE;
                }
                else
                {
                    return SKIP_BODY;
                }
            }

            return 0;
        }
        private boolean isValueReference(String value)
        {

            if (value == null)
            {
                throw new NullPointerException();
            }
            if ((value.indexOf("#{") != -1)
                && (value.indexOf("#{") < value.indexOf('}')))
            {
                return true;
            }
            return false;

        }

        /**
         * End tag encoder.
         * 
         * @return indication to render.
         */
        public int doEndTag()
            throws JspException
        {
            final String methodName = "doEndTag";

            return 0;
        }

        /**
         * After body encoder.
         * 
         * @return indication to render.
         */
        public int doAfterBody()
        {
            final String methodName = "doAfterBody";

            FacesContext context = FacesContext.getCurrentInstance();
            if (null != bodyContent)
            {
                try
                {
                    JspWriter out = getPreviousOut();
                    out.print(bodyContent.getString());
                    bodyContent.clearBody();
                }
                catch (IOException e)
                {
                    //LOGSERVICE.logError(e.getMessage());
                }

            }
            if ((iterator != null) && (iterator.hasNext()))
            {
                if (values instanceof List)
                {
                    Object obj = iterator.next();

                    ve.setValue(getELContext(), obj);
                }

                return EVAL_BODY_AGAIN;
            }
            else
            {

                return SKIP_BODY;
            }
        }


        public void release()
        {
            final String methodName = "release";

            iterator = null;
        }

    }

请建议如何解决此问题。