用JSF1.2实现迭代，循环标签（还是组件？）

package com.zdt.tld; import java.io.IOException; import java.util.Map; import javax.faces.component.UIComponentBase; import javax.faces.component.UIInput; import javax.faces.context.FacesContext; import javax.faces.context.ResponseWriter; import javax.faces.webapp.UIComponentBodyTag; import javax.faces.webapp.UIComponentTag; public class UITextWithCmd extends UIInput { private static final String TEXT = ".text"; public UITextWithCmd() { log(this.getValue()); } private static final String CMD = ".cmd"; public void encodeEnd(FacesContext context) throws IOException { log("encodeEnd"); ResponseWriter writer = context.getResponseWriter(); String clientId = getClientId(context); encodeTextField(writer, clientId); encodeCommand(writer, clientId); encodeSelect(writer, clientId); } public void decode(FacesContext context) { log("decode"); Map reqParaMap = context.getExternalContext().getRequestParameterMap(); String clientId = getClientId(context); String submittedValue = (String) reqParaMap.get(clientId + TEXT); setSubmittedValue(submittedValue); setValid(true); } private void encodeTextField(ResponseWriter writer, String clientId) throws IOException { log("encodeTextField"); writer.startElement("input", this); writer.writeAttribute("name", "userName", null); writer.writeAttribute("id", "userName", null); Object value = getValue(); if (value != null) { writer.writeAttribute("value", value.toString(), null); } String size = (String) getAttributes().get("size"); if (size != null) { writer.writeAttribute("size", size, null); } writer.endElement("input"); } private void encodeCommand(ResponseWriter writer, String clientId) throws IOException { log("encodeCommand"); writer.startElement("input", this); writer.writeAttribute("type", "button", null); writer.writeAttribute("name", clientId + CMD, null); writer.writeAttribute("value", "requestUserName", null); writer.writeAttribute("onClick", "requestUserName()", null); writer.endElement("input"); } private void encodeSelect(ResponseWriter writer, String clientId) throws IOException { log("encodeSelect"); writer.startElement("select", this); writer.writeAttribute("name", "userKind", null); writer.startElement("option", this); writer.writeAttribute("value", "01", null); writer.writeText("text", null); writer.endElement("option"); writer.endElement("select"); writer.write("<select name='userId'><option value='1'>U0001</option></select>"); } private void log(Object obj){ } }