readfiletag.java

JavaWeb高级特性书中源代码

package org.it315;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.TagSupport;
public class ReadFileTag extends TagSupport
{
	private String src;
	public void setSrc(String src)
	{
		this.src = src;
	}
	public int doStartTag() throws JspException
	{
		InputStream in;
		BufferedReader br;
		try
		{
			in = pageContext.getServletContext().getResourceAsStream(src);
			br = new BufferedReader(new InputStreamReader(in));
			String line = br.readLine();
			while(line != null)
			{
				pageContext.getOut().write(line + "\r\n");
				line = br.readLine();
			}
			br.close();
		}
		catch(IOException ioe)
		{
			ioe.getMessage();
		}
		return SKIP_BODY;
	}
}