iteratetag.java

来自「JavaWeb高级特性书中源代码」· Java 代码 · 共 46 行

package org.it315;
import javax.servlet.jsp.tagext.TagSupport;
import javax.servlet.jsp.JspException;
public class IterateTag extends TagSupport 
{
	String name;
	String [] items;
	int i = 1;

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

	public void setItems(String[] items) 
	{
		this.items = items;
	}

	public int doStartTag() throws JspException 
	{
		if(items!=null && items.length > 0)
		{
			pageContext.setAttribute(name,items[0]);
			return EVAL_BODY_INCLUDE;
		}
		else
		{
			return SKIP_BODY;
		}
	}

	public int doAfterBody() throws JspException 
	{
		if(i < items.length)
		{
			pageContext.setAttribute(name,items[i]);
			i++;
			return EVAL_BODY_AGAIN;
		}
		else
		{
			return SKIP_BODY;
		}
	}
}