outtag.java

jsp 应用开发技术光盘 是《jsp应用开发技术》这本书的源代码

package ch19;

import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import java.io.IOException;

public class OutTag extends TagSupport 
{
	private Object value;	
	
    /**
     *覆盖doStartTag方法
     */
	public void setValue(Object value) {
   	 	this.value=value;
	}
   
    public int doStartTag() throws JspTagException {
    	return EVAL_BODY_INCLUDE;
    }
    
    /**
     *覆盖doEndTag方法
     */
	public int doEndTag()throws JspTagException	{

		try
		{			
			pageContext.getOut().write(value.toString());			
		}
		catch(IOException ex)
		{
			throw new JspTagException("Fatal error:hello tag conld not write to JSP out");
		}
		return EVAL_PAGE;
	}
}