iteratetag.java

张新曼 精通JSP Web 开发技术与典型应用 随书光盘源码

package ch10;

import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
public class IterateTag extends TagSupport {
	/**
	 * 添加缺省串行版本标识
	 */
	private static final long serialVersionUID = 1L;
	private int arrayCount=0;
	private String[] strings=null;
	public int doStartTag(){
		strings = (String[]) pageContext.getAttribute("strings");
		return EVAL_BODY_INCLUDE;
	}
	public int doAfterBody() throws JspException{
		try{
			pageContext.getOut().print(""+strings[arrayCount]+"<br>");
		}catch(Exception e){
			throw new JspException(e.toString());
		}
		arrayCount++;
		if(arrayCount>=strings.length){
			return SKIP_BODY;
		}
		return EVAL_BODY_AGAIN;
	}
}