tabletag.java

阿

package com.abc.tag;

import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;

import java.util.*;
import java.beans.*;

public class TableTag extends BodyTagSupport {

	List data;

	String type, name;

	Iterator it;

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

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getType() {
		return type;
	}

	public void setType(String type) {
		this.type = type;
	}

	public int doStartTag() throws JspException {
		try {
			
			pageContext.getOut().write("<table border=1>");
			it = data.iterator();
			if (it.hasNext()) {
				/*
				pageContext.setAttribute(name, Beans.instantiate(getClass()
						.getClassLoader(), type));
				*/
				pageContext.setAttribute(name, it.next());
			} else {
				return SKIP_BODY;
			}
		} catch (Exception e) {
			throw new JspException(e);
		}
		//return EVAL_BODY_INCLUDE;  please don't use the bodyContent object, use pageContext.getOut() directly
		return EVAL_BODY_BUFFERED;

	}
	
	public int doAfterBody() throws JspException {
		if(it.hasNext()) {
			pageContext.setAttribute(name, it.next());
			return EVAL_BODY_AGAIN;
		}
		else {
			return SKIP_BODY;
		}

	}

	public int doEndTag() throws JspException {
		try {
			//bodyContent.getEnclosingWriter().print("</table>");
			//pageContext.getOut().println("</table>");
			
			bodyContent.print("</table>");  //!!!!
			
			getPreviousOut().print(bodyContent.getString());
			
			//pageContext.getOut().println(bodyContent.getString());
		} catch (Exception e) {
			throw new JspException(e);
		}
		return EVAL_PAGE;
	}

}