filterhtmlsimpletag.java

用java编写的程序

package webbook.chapter12;

import java.io.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import webbook.util.StringUtil;

public class FilterHtmlSimpleTag extends SimpleTagSupport {
	public void doTag() throws JspTagException {
		PageContext pageContext = (PageContext) getJspContext();
		JspWriter out = pageContext.getOut();
		JspFragment frag = getJspBody();
		StringWriter writer = new StringWriter();
		try {
			frag.invoke(writer);			
			out.println(StringUtil.filterHtml(writer.toString()));			
		} catch (JspException e) {
			throw new JspTagException(e);
		} catch (IOException e) {
			throw new JspTagException(e);
		}
	}
}