在线求救：tag报一下错误！！！高分（200）

tag源代码如下：package com.westerasoft.khcerp.tag.mms.basedata;import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.TagSupport;
import org.apache.ecs.html.*;import com.westerasoft.khcerp.form.mms.basedata.MaterialClassActionForm;
public class MmsMaterialClassEditTag extends TagSupport {
public int doStartTag() throws JspException {
JspWriter writer = pageContext.getOut();
try {


HttpServletRequest request =
(HttpServletRequest) pageContext.getRequest();
MaterialClassActionForm classForm = (MaterialClassActionForm)request.getAttribute("classForm");
//输出信息
/*
writer.println(
      (new Table().setWidth("90%").setBorder("0").setAlign("center")
            .addElement(new TD().addElement(new Input().setName("classID").setValue(classForm.getClassID()).setType("hidden"))
    .addElement(new Input().setName("parentClassID").setValue(classForm.getParentClassID()).setType("hidden"))
    .addElement(new Input().setName("postion").setValue(classForm.getPostion()).setType("hidden"))
    .addElement(new Input().setName("classMethodID").setValue(classForm.getClassMethodID()).setType("hidden"))
    .addElement(new Input().setName("classNo").setValue(classForm.getClassNo()))
       .setWidth("20%").setAlign("left").setClass("td"))
            .addElement(new TD().addElement(new Input().setName("className").setValue(classForm.getClassName())).setWidth("20%").setAlign("left").setClass("td"))
            .addElement(new TD().addElement(new Input().setName("level").setValue(classForm.getLevel())).setWidth("20%").setAlign("left").setClass("td"))
            .addElement(new TD().addElement(new Input().setName("desc").setValue(classForm.getDesc())).setWidth("20%").setAlign("left").setClass("td"))
                       .setClass("table1"))
               );
 
*/
writer.println(
(new Table().setWidth("90%").setBorder("0").setAlign("center")
.addElement(new TR().setAlign("center").addElement(new TD().addElement("classno").setWidth("16%").setAlign("right").setClass("td1"))
   .addElement(new TD().addElement(new Input().setName("classNo").setValue("aaa")).setWidth("84%").setAlign("left").setWidth("84%").setAlign("left").setClass("td"))
)
.setClass("table1"))

);


} catch (Exception e) {
throw new JspException(e.getMessage());
}
return (SKIP_BODY);
}}